********************************************************************************
conan test conan-center-index/recipes/tcb-span/all/test_package/conanfile.py tcb-span/cci.20200603@ --profile=/home/conan/w/BuildSingleReference/20349/20ba5e3c-9bb7-4fbd-bce2-2eeba3b7f3d9/profile.txt
********************************************************************************
Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=4.9
os=Linux
os_build=Linux
[options]
[build_requires]
[env]

tcb-span/cci.20200603 (test package): Installing package
Requirements
    tcb-span/cci.20200603 from local cache - Cache
Packages
    tcb-span/cci.20200603:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 - Cache

Installing (downloading, building) binaries...
tcb-span/cci.20200603: Already installed!
[HOOK - conan-center.py] post_package_info(): [CMAKE FILE NOT IN BUILD FOLDERS (KB-H019)] OK
[HOOK - conan-center.py] post_package_info(): [LIBRARY DOES NOT EXIST (KB-H054)] OK
tcb-span/cci.20200603 (test package): Generator cmake_find_package created Findtcb-span.cmake
tcb-span/cci.20200603 (test package): Generator txt created conanbuildinfo.txt
tcb-span/cci.20200603 (test package): Generated conaninfo.txt
tcb-span/cci.20200603 (test package): Generated graphinfo
Using lockfile: '/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/build/dfae4d6ba682b8d9c5630c4c912db585c2a46c64/conan.lock'
Using cached profile from lockfile
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] 'fPIC' option not found
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK
tcb-span/cci.20200603 (test package): Calling build()

----Running------
> cd '/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/build/dfae4d6ba682b8d9c5630c4c912db585c2a46c64' && cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE="Release" -DCONAN_IN_LOCAL_CACHE="OFF" -DCONAN_COMPILER="gcc" -DCONAN_COMPILER_VERSION="4.9" -DCONAN_CXX_FLAGS="-m64" -DCONAN_SHARED_LINKER_FLAGS="-m64" -DCONAN_C_FLAGS="-m64" -DCONAN_LIBCXX="libstdc++" -DCMAKE_INSTALL_PREFIX="/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/build/dfae4d6ba682b8d9c5630c4c912db585c2a46c64/package" -DCMAKE_INSTALL_BINDIR="bin" -DCMAKE_INSTALL_SBINDIR="bin" -DCMAKE_INSTALL_LIBEXECDIR="bin" -DCMAKE_INSTALL_LIBDIR="lib" -DCMAKE_INSTALL_INCLUDEDIR="include" -DCMAKE_INSTALL_OLDINCLUDEDIR="include" -DCMAKE_INSTALL_DATAROOTDIR="share" -DCMAKE_MODULE_PATH="/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/build/dfae4d6ba682b8d9c5630c4c912db585c2a46c64" -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY="ON" -DCONAN_EXPORTED="1" -Wno-dev '/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package'
-----------------
-- The C compiler identification is GNU 4.9.4
-- The CXX compiler identification is GNU 4.9.4
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/g++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Conan: Using autogenerated Findtcb-span.cmake
-- Found tcb-span: cci.20200603 (found version "cci.20200603") 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/build/dfae4d6ba682b8d9c5630c4c912db585c2a46c64

----Running------
> cmake --build '/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/build/dfae4d6ba682b8d9c5630c4c912db585c2a46c64' '--' '-j3'
-----------------
Scanning dependencies of target test_package
[ 50%] Building CXX object CMakeFiles/test_package.dir/test_package.cxx.o
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY
    CMAKE_INSTALL_BINDIR
    CMAKE_INSTALL_DATAROOTDIR
    CMAKE_INSTALL_INCLUDEDIR
    CMAKE_INSTALL_LIBDIR
    CMAKE_INSTALL_LIBEXECDIR
    CMAKE_INSTALL_OLDINCLUDEDIR
    CMAKE_INSTALL_SBINDIR
    CONAN_COMPILER
    CONAN_COMPILER_VERSION
    CONAN_CXX_FLAGS
    CONAN_C_FLAGS
    CONAN_EXPORTED
    CONAN_IN_LOCAL_CACHE
    CONAN_LIBCXX
    CONAN_SHARED_LINKER_FLAGS


In file included from /usr/include/c++/4.9/array:35:0,
                 from /home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:15,
                 from /home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/test_package.cxx:1:
/usr/include/c++/4.9/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
 #error This file requires compiler and library support for the \
  ^
In file included from /home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/test_package.cxx:1:0:
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:136:7: error: expected nested-name-specifier before 'byte'
 using byte = unsigned char;
       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:145:21: error: 'constexpr' does not name a type
 TCB_SPAN_INLINE_VAR constexpr std::size_t dynamic_extent = SIZE_MAX;
                     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:145:21: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:147:54: error: 'dynamic_extent' was not declared in this scope
 template <typename ElementType, std::size_t Extent = dynamic_extent>
                                                      ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:154:5: error: 'constexpr' does not name a type
     constexpr span_storage() noexcept = default;
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:154:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:156:5: error: 'constexpr' does not name a type
     constexpr span_storage(E* p_ptr, std::size_t /*unused*/) noexcept
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:156:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:161:12: error: 'constexpr' does not name a type
     static constexpr std::size_t size = S;
            ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:161:12: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:160:14: error: 'nullptr' was not declared in this scope
     E* ptr = nullptr;
              ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:165:24: error: 'dynamic_extent' was not declared in this scope
 struct span_storage<E, dynamic_extent> {
                        ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:165:38: error: template argument 2 is invalid
 struct span_storage<E, dynamic_extent> {
                                      ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:183:1: error: 'constexpr' does not name a type
 constexpr auto size(const C& c) -> decltype(c.size())
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:183:1: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:189:1: error: 'constexpr' does not name a type
 constexpr std::size_t size(const T (&)[N]) noexcept
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:189:1: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:195:1: error: 'constexpr' does not name a type
 constexpr auto data(C& c) -> decltype(c.data())
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:195:1: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:201:1: error: 'constexpr' does not name a type
 constexpr auto data(const C& c) -> decltype(c.data())
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:201:1: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:207:1: error: 'constexpr' does not name a type
 constexpr T* data(T (&array)[N]) noexcept
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:207:1: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:213:1: error: 'constexpr' does not name a type
 constexpr const E* data(std::initializer_list<E> il) noexcept
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:213:1: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:223:1: error: expected unqualified-id before 'using'
 using void_t = void;
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:227:1: error: expected unqualified-id before 'using'
 using uncvref_t =
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:231:34: error: expected class-name before '{' token
 struct is_span : std::false_type {};
                                  ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:234:35: error: template argument 2 is invalid
 struct is_span<span<T, S>> : std::true_type {};
                                   ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:234:46: error: template argument 1 is invalid
 struct is_span<span<T, S>> : std::true_type {};
                                              ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:237:39: error: expected class-name before '{' token
 struct is_std_array : std::false_type {};
                                       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:240:21: error: 'array' is not a member of 'std'
 struct is_std_array<std::array<T, N>> : std::true_type {};
                     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:240:21: error: 'array' is not a member of 'std'
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:240:36: error: spurious '>>', use '>' to terminate a template argument list
 struct is_std_array<std::array<T, N>> : std::true_type {};
                                    ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:240:36: error: wrong number of template arguments (2, should be 1)
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:237:8: error: provided for 'template<class> struct tcb::detail::is_std_array'
 struct is_std_array : std::false_type {};
        ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:240:56: error: expected class-name before '{' token
 struct is_std_array<std::array<T, N>> : std::true_type {};
                                                        ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:243:44: error: expected class-name before '{' token
 struct has_size_and_data : std::false_type {};
                                            ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:246:29: error: 'void_t' was not declared in this scope
 struct has_size_and_data<T, void_t<decltype(detail::size(std::declval<T>())),
                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:246:45: error: 'size' is not a member of 'tcb::detail'
 struct has_size_and_data<T, void_t<decltype(detail::size(std::declval<T>())),
                                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:246:58: error: 'declval' is not a member of 'std'
 struct has_size_and_data<T, void_t<decltype(detail::size(std::declval<T>())),
                                                          ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:246:75: error: a function call cannot appear in a constant-expression
 struct has_size_and_data<T, void_t<decltype(detail::size(std::declval<T>())),
                                                                           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:246:76: error: a function call cannot appear in a constant-expression
 struct has_size_and_data<T, void_t<decltype(detail::size(std::declval<T>())),
                                                                            ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:247:45: error: 'data' is not a member of 'tcb::detail'
                                    decltype(detail::data(std::declval<T>()))>>
                                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:247:58: error: 'declval' is not a member of 'std'
                                    decltype(detail::data(std::declval<T>()))>>
                                                          ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:247:75: error: a function call cannot appear in a constant-expression
                                    decltype(detail::data(std::declval<T>()))>>
                                                                           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:247:76: error: a function call cannot appear in a constant-expression
                                    decltype(detail::data(std::declval<T>()))>>
                                                                            ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:247:77: error: spurious '>>', use '>' to terminate a template argument list
                                    decltype(detail::data(std::declval<T>()))>>
                                                                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:247:77: error: wrong number of template arguments (3, should be 2)
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:243:8: error: provided for 'template<class, class> struct tcb::detail::has_size_and_data'
 struct has_size_and_data : std::false_type {};
        ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:248:22: error: expected class-name before '{' token
     : std::true_type {};
                      ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:250:36: error: 'uncvref_t' does not name a type
 template <typename C, typename U = uncvref_t<C>>
                                    ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:250:45: error: expected '>' before '<' token
 template <typename C, typename U = uncvref_t<C>>
                                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:251:21: error: expected unqualified-id before '{' token
 struct is_container {
                     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:258:1: error: expected unqualified-id before 'using'
 using remove_pointer_t = typename std::remove_pointer<T>::type;
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:261:63: error: expected class-name before '{' token
 struct is_container_element_type_compatible : std::false_type {};
                                                               ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:266:19: error: 'enable_if' in namespace 'std' does not name a template type
     typename std::enable_if<
                   ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:266:28: error: expected template-argument before '<' token
     typename std::enable_if<
                            ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:266:28: error: expected '>' before '<' token
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:269:42: error: template argument 3 is invalid
                       void>::value>::type>
                                          ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:270:5: error: expected '::' before ':' token
     : std::is_convertible<
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:270:5: error: expected identifier before ':' token
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:270:5: error: qualified name does not name a class before ':' token
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:270:5: error: expected '{' before ':' token
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:270:5: error: expected unqualified-id before ':' token
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:275:38: error: expected class-name before '{' token
 struct is_complete : std::false_type {};
                                      ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:278:41: error: a function call cannot appear in a constant-expression
 struct is_complete<T, decltype(sizeof(T))> : std::true_type {};
                                         ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:278:42: error: template argument 2 is invalid
 struct is_complete<T, decltype(sizeof(T))> : std::true_type {};
                                          ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:278:61: error: expected class-name before '{' token
 struct is_complete<T, decltype(sizeof(T))> : std::true_type {};
                                                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:284:24: error: 'std::is_object' has not been declared
     static_assert(std::is_object<ElementType>::value,
                        ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:284:33: error: expected ',' or '...' before '<' token
     static_assert(std::is_object<ElementType>::value,
                                 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:287:53: error: 'tcb::detail::is_complete<ElementType, long unsigned int>::value' is not a type
     static_assert(detail::is_complete<ElementType>::value,
                                                     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:288:19: error: expected identifier before string constant
                   "A span's ElementType must be a complete type (not a forward "
                   ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:288:19: error: expected ',' or '...' before string constant
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:290:19: error: expected identifier before '!' token
     static_assert(!std::is_abstract<ElementType>::value,
                   ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:290:19: error: expected ',' or '...' before '!' token
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:290:5: error: 'int tcb::span<ElementType, Extent>::static_assert(int)' cannot be overloaded
     static_assert(!std::is_abstract<ElementType>::value,
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:284:5: error: with 'int tcb::span<ElementType, Extent>::static_assert(int)'
     static_assert(std::is_object<ElementType>::value,
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:293:11: error: expected nested-name-specifier before 'storage_type'
     using storage_type = detail::span_storage<ElementType, Extent>;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:297:11: error: expected nested-name-specifier before 'element_type'
     using element_type = ElementType;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:298:11: error: expected nested-name-specifier before 'value_type'
     using value_type = typename std::remove_cv<ElementType>::type;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:299:11: error: expected nested-name-specifier before 'size_type'
     using size_type = std::size_t;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:300:11: error: expected nested-name-specifier before 'difference_type'
     using difference_type = std::ptrdiff_t;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:301:11: error: expected nested-name-specifier before 'pointer'
     using pointer = element_type*;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:302:11: error: expected nested-name-specifier before 'const_pointer'
     using const_pointer = const element_type*;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:303:11: error: expected nested-name-specifier before 'reference'
     using reference = element_type&;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:304:11: error: expected nested-name-specifier before 'const_reference'
     using const_reference = const element_type&;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:305:11: error: expected nested-name-specifier before 'iterator'
     using iterator = pointer;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:306:11: error: expected nested-name-specifier before 'reverse_iterator'
     using reverse_iterator = std::reverse_iterator<iterator>;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:308:12: error: 'constexpr' does not name a type
     static constexpr size_type extent = Extent;
            ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:308:12: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:313:23: error: 'enable_if' in namespace 'std' does not name a template type
         typename std::enable_if<(E == dynamic_extent || E <= 0), int>::type = 0>
                       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:313:32: error: expected '>' before '<' token
         typename std::enable_if<(E == dynamic_extent || E <= 0), int>::type = 0>
                                ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:314:5: error: 'constexpr' does not name a type
     constexpr span() noexcept
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:314:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:317:5: error: 'constexpr' does not name a type
     TCB_SPAN_CONSTEXPR11 span(pointer ptr, size_type count)
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:317:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:323:5: error: 'constexpr' does not name a type
     TCB_SPAN_CONSTEXPR11 span(pointer first_elem, pointer last_elem)
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:323:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:332:29: error: 'enable_if' in namespace 'std' does not name a template type
               typename std::enable_if<
                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:332:38: error: expected '>' before '<' token
               typename std::enable_if<
                                      ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:337:5: error: 'constexpr' does not name a type
     constexpr span(element_type (&arr)[N]) noexcept : storage_(arr, N)
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:337:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:341:29: error: 'enable_if' in namespace 'std' does not name a template type
               typename std::enable_if<
                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:341:38: error: expected '>' before '<' token
               typename std::enable_if<
                                      ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:346:45: error: expected ')' before '<' token
     TCB_SPAN_ARRAY_CONSTEXPR span(std::array<value_type, N>& arr) noexcept
                                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:351:29: error: 'enable_if' in namespace 'std' does not name a template type
               typename std::enable_if<
                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:351:38: error: expected '>' before '<' token
               typename std::enable_if<
                                      ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:356:46: error: 'array' in namespace 'std' does not name a template type
     TCB_SPAN_ARRAY_CONSTEXPR span(const std::array<value_type, N>& arr) noexcept
                                              ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:356:51: error: expected ',' or '...' before '<' token
     TCB_SPAN_ARRAY_CONSTEXPR span(const std::array<value_type, N>& arr) noexcept
                                                   ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:356:73: error: expected initializer before 'noexcept'
     TCB_SPAN_ARRAY_CONSTEXPR span(const std::array<value_type, N>& arr) noexcept
                                                                         ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:362:23: error: 'enable_if' in namespace 'std' does not name a template type
         typename std::enable_if<
                       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:362:32: error: expected '>' before '<' token
         typename std::enable_if<
                                ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:367:5: error: 'constexpr' does not name a type
     constexpr span(Container& cont)
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:367:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:373:23: error: 'enable_if' in namespace 'std' does not name a template type
         typename std::enable_if<
                       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:373:32: error: expected '>' before '<' token
         typename std::enable_if<
                                ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:378:5: error: 'constexpr' does not name a type
     constexpr span(const Container& cont)
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:378:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:382:5: error: 'constexpr' does not name a type
     constexpr span(const span& other) noexcept = default;
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:382:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:385:29: error: 'enable_if' in namespace 'std' does not name a template type
               typename std::enable_if<
                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:385:38: error: expected '>' before '<' token
               typename std::enable_if<
                                      ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:390:5: error: 'constexpr' does not name a type
     constexpr span(const span<OtherElementType, OtherExtent>& other) noexcept
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:390:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:394:11: error: expected ';' at end of member declaration
     ~span() noexcept = default;
           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:394:13: error: 'noexcept' does not name a type
     ~span() noexcept = default;
             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:397:32: error: expected ';' at end of member declaration
     operator=(const span& other) noexcept = default;
                                ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:397:34: error: 'noexcept' does not name a type
     operator=(const span& other) noexcept = default;
                                  ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:401:5: error: 'constexpr' does not name a type
     TCB_SPAN_CONSTEXPR11 span<element_type, Count> first() const
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:401:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:408:5: error: 'constexpr' does not name a type
     TCB_SPAN_CONSTEXPR11 span<element_type, Count> last() const
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:408:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:414:55: error: 'dynamic_extent' was not declared in this scope
     template <std::size_t Offset, std::size_t Count = dynamic_extent>
                                                       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:415:5: error: expected unqualified-id before 'using'
     using subspan_return_t =
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:421:55: error: 'dynamic_extent' was not declared in this scope
     template <std::size_t Offset, std::size_t Count = dynamic_extent>
                                                       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:422:5: error: 'constexpr' does not name a type
     TCB_SPAN_CONSTEXPR11 subspan_return_t<Offset, Count> subspan() const
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:422:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:430:5: error: 'constexpr' does not name a type
     TCB_SPAN_CONSTEXPR11 span<element_type, dynamic_extent>
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:430:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:437:5: error: 'constexpr' does not name a type
     TCB_SPAN_CONSTEXPR11 span<element_type, dynamic_extent>
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:437:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:444:5: error: 'constexpr' does not name a type
     TCB_SPAN_CONSTEXPR11 span<element_type, dynamic_extent>
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:444:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:454:5: error: 'constexpr' does not name a type
     constexpr size_type size() const noexcept { return storage_.size; }
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:454:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:456:5: error: 'constexpr' does not name a type
     constexpr size_type size_bytes() const noexcept
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:456:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:461:24: error: 'constexpr' does not name a type
     TCB_SPAN_NODISCARD constexpr bool empty() const noexcept
                        ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:461:24: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:467:5: error: 'constexpr' does not name a type
     TCB_SPAN_CONSTEXPR11 reference operator[](size_type idx) const
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:467:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:473:5: error: 'constexpr' does not name a type
     TCB_SPAN_CONSTEXPR11 reference front() const
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:473:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:479:5: error: 'constexpr' does not name a type
     TCB_SPAN_CONSTEXPR11 reference back() const
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:479:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:485:5: error: 'constexpr' does not name a type
     constexpr pointer data() const noexcept { return storage_.ptr; }
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:485:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:488:5: error: 'constexpr' does not name a type
     constexpr iterator begin() const noexcept { return data(); }
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:488:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:490:5: error: 'constexpr' does not name a type
     constexpr iterator end() const noexcept { return data() + size(); }
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:490:5: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:492:30: error: 'reverse_iterator' does not name a type
     TCB_SPAN_ARRAY_CONSTEXPR reverse_iterator rbegin() const noexcept
                              ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:497:30: error: 'reverse_iterator' does not name a type
     TCB_SPAN_ARRAY_CONSTEXPR reverse_iterator rend() const noexcept
                              ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:503:5: error: 'storage_type' does not name a type
     storage_type storage_{};
     ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:527:1: error: 'constexpr' does not name a type
 constexpr span<ElementType, Extent>
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:527:1: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:534:1: error: 'constexpr' does not name a type
 constexpr span<T, N> make_span(T (&arr)[N]) noexcept
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:534:1: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:540:52: error: template declaration of 'tcb::span<T, N> tcb::make_span'
 TCB_SPAN_ARRAY_CONSTEXPR span<T, N> make_span(std::array<T, N>& arr) noexcept
                                                    ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:540:47: error: 'array' is not a member of 'std'
 TCB_SPAN_ARRAY_CONSTEXPR span<T, N> make_span(std::array<T, N>& arr) noexcept
                                               ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:540:59: error: expected primary-expression before ',' token
 TCB_SPAN_ARRAY_CONSTEXPR span<T, N> make_span(std::array<T, N>& arr) noexcept
                                                           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:540:65: error: 'arr' was not declared in this scope
 TCB_SPAN_ARRAY_CONSTEXPR span<T, N> make_span(std::array<T, N>& arr) noexcept
                                                                 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:547:22: error: 'array' in namespace 'std' does not name a template type
 make_span(const std::array<T, N>& arr) noexcept
                      ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:547:27: error: expected ',' or '...' before '<' token
 make_span(const std::array<T, N>& arr) noexcept
                           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:547:40: error: expected initializer before 'noexcept'
 make_span(const std::array<T, N>& arr) noexcept
                                        ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:553:1: error: 'constexpr' does not name a type
 constexpr span<typename Container::value_type> make_span(Container& cont)
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:553:1: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:559:1: error: 'constexpr' does not name a type
 constexpr span<const typename Container::value_type>
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:559:1: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:567:77: error: template argument 1 is invalid
                                              : sizeof(ElementType) * Extent)>
                                                                             ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:567:77: error: template argument 2 is invalid
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:568:39: error: expected initializer before 'noexcept'
 as_bytes(span<ElementType, Extent> s) noexcept
                                       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:575:19: error: 'enable_if' in namespace 'std' does not name a template type
     typename std::enable_if<!std::is_const<ElementType>::value, int>::type = 0>
                   ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:575:28: error: expected '>' before '<' token
     typename std::enable_if<!std::is_const<ElementType>::value, int>::type = 0>
                            ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:576:6: error: 'byte' was not declared in this scope
 span<byte, ((Extent == dynamic_extent) ? dynamic_extent
      ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:576:24: error: 'dynamic_extent' was not declared in this scope
 span<byte, ((Extent == dynamic_extent) ? dynamic_extent
                        ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:576:42: error: 'dynamic_extent' was not declared in this scope
 span<byte, ((Extent == dynamic_extent) ? dynamic_extent
                                          ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:577:71: error: template argument 1 is invalid
                                        : sizeof(ElementType) * Extent)>
                                                                       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:577:71: error: template argument 2 is invalid
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:578:48: error: expected initializer before 'noexcept'
 as_writable_bytes(span<ElementType, Extent> s) noexcept
                                                ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:584:1: error: 'constexpr' does not name a type
 constexpr auto get(span<E, S> s) -> decltype(s[N])
 ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:584:1: note: C++11 'constexpr' only available with -std=c++11 or -std=gnu++11
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:594:7: error: 'tuple_size' is not a class template
 class tuple_size<TCB_SPAN_NAMESPACE_NAME::span<ElementType, Extent>>
       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:595:46: error: template argument 2 is invalid
     : public integral_constant<size_t, Extent> {};
                                              ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:599:18: error: 'dynamic_extent' is not a member of 'tcb'
     ElementType, TCB_SPAN_NAMESPACE_NAME::dynamic_extent>>; // not defined
                  ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:599:18: error: 'dynamic_extent' is not a member of 'tcb'
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:599:57: error: template argument 2 is invalid
     ElementType, TCB_SPAN_NAMESPACE_NAME::dynamic_extent>>; // not defined
                                                         ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:598:43: error: wrong number of template arguments (1, should be 2)
 class tuple_size<TCB_SPAN_NAMESPACE_NAME::span<
                                           ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:594:7: error: provided for 'template<class ElementType, long unsigned int Extent> class std::tuple_size'
 class tuple_size<TCB_SPAN_NAMESPACE_NAME::span<ElementType, Extent>>
       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:602:7: error: 'tuple_element' is not a class template
 class tuple_element<I, TCB_SPAN_NAMESPACE_NAME::span<ElementType, Extent>> {
       ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:602:73: error: template argument 2 is invalid
 class tuple_element<I, TCB_SPAN_NAMESPACE_NAME::span<ElementType, Extent>> {
                                                                         ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:604:19: error: 'Extent' is not a type
     static_assert(Extent != TCB_SPAN_NAMESPACE_NAME::dynamic_extent &&
                   ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:604:26: error: expected ',' or '...' before '!=' token
     static_assert(Extent != TCB_SPAN_NAMESPACE_NAME::dynamic_extent &&
                          ^
/home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/tcb/span.hpp:607:11: error: expected nested-name-specifier before 'type'
     using type = ElementType;
           ^
/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/test_package.cxx:8:40: error: template argument 2 is invalid
 std::ptrdiff_t size(tcb::span<const int> s)
                                        ^
/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/test_package.cxx: In function 'std::ptrdiff_t size(int)':
/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/test_package.cxx:10:11: error: request for member 'size' in 's', which is of non-class type 'int'
  return s.size();
           ^
/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/test_package.cxx: In function 'int main()':
/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/test_package.cxx:16:2: error: 'array' is not a member of 'std'
  std::array<int, 2> cxxarr = {1, 2};
  ^
/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/test_package.cxx:16:13: error: expected primary-expression before 'int'
  std::array<int, 2> cxxarr = {1, 2};
             ^
/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/test_package.cxx:18:36: error: invalid conversion from 'int*' to 'int' [-fpermissive]
  printf("C-array: %ti\n", size(carr));
                                    ^
/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/test_package.cxx:8:16: note: initializing argument 1 of 'std::ptrdiff_t size(int)'
 std::ptrdiff_t size(tcb::span<const int> s)
                ^
/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/test_package.cxx:19:32: error: 'cxxarr' was not declared in this scope
  printf("array:   %ti\n", size(cxxarr));
                                ^
make[2]: *** [CMakeFiles/test_package.dir/test_package.cxx.o] Error 1
make[1]: *** [CMakeFiles/test_package.dir/all] Error 2
make: *** [all] Error 2
tcb-span/cci.20200603: WARN: Lib folder doesn't exist, can't collect libraries: /home/conan/w/BuildSingleReference/.conan/data/tcb-span/cci.20200603/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/lib
ERROR: tcb-span/cci.20200603 (test package): Error in build() method, line 12
	cmake.build()
	ConanException: Error 2 while executing cmake --build '/home/conan/w/BuildSingleReference/conan-center-index/recipes/tcb-span/all/test_package/build/dfae4d6ba682b8d9c5630c4c912db585c2a46c64' '--' '-j3'