Auto detecting your dev setup to initialize the default profile (/tmp/c3ipr/pr_897_2_0_0/.conan/profiles/default)
CC and CXX: /usr/bin/gcc, /usr/bin/g++ 
Found gcc 5.4
gcc>=5, using the major as version

************************* WARNING: GCC OLD ABI COMPATIBILITY ***********************
 
Conan detected a GCC version > 5 but has adjusted the 'compiler.libcxx' setting to
'libstdc++' for backwards compatibility.
Your compiler is likely using the new CXX11 ABI by default (libstdc++11).

If you want Conan to use the new ABI for the default profile, run:

    $ conan profile update settings.compiler.libcxx=libstdc++11 default

Or edit '/tmp/c3ipr/pr_897_2_0_0/.conan/profiles/default' and set compiler.libcxx=libstdc++11

************************************************************************************



Default settings
	os=Linux
	os_build=Linux
	arch=x86_64
	arch_build=x86_64
	compiler=gcc
	compiler.version=5
	compiler.libcxx=libstdc++
	build_type=Release
*** You can change them in /tmp/c3ipr/pr_897_2_0_0/.conan/profiles/default ***
*** Or override with -s compiler='other' -s ...s***


[HOOK - conan-center.py] pre_export(): [DEPRECATED GLOBAL CPPSTD (KB-H001)] OK
[HOOK - conan-center.py] pre_export(): [REFERENCE LOWERCASE (KB-H002)] OK
[HOOK - conan-center.py] pre_export(): [RECIPE METADATA (KB-H003)] OK
[HOOK - conan-center.py] pre_export(): [HEADER_ONLY, NO COPY SOURCE (KB-H005)] OK
[HOOK - conan-center.py] pre_export(): [FPIC OPTION (KB-H006)] OK
[HOOK - conan-center.py] pre_export(): [VERSION RANGES (KB-H008)] OK
[HOOK - conan-center.py] pre_export(): [RECIPE FOLDER SIZE (KB-H009)] Total recipe size: 6.7060546875 KB
[HOOK - conan-center.py] pre_export(): [RECIPE FOLDER SIZE (KB-H009)] OK
[HOOK - conan-center.py] pre_export(): [EXPORT LICENSE (KB-H023)] exports: None
[HOOK - conan-center.py] pre_export(): [EXPORT LICENSE (KB-H023)] exports: CMakeLists.txt
[HOOK - conan-center.py] pre_export(): [EXPORT LICENSE (KB-H023)] OK
[HOOK - conan-center.py] pre_export(): [TEST PACKAGE FOLDER (KB-H024)] OK
[HOOK - conan-center.py] pre_export(): [META LINES (KB-H025)] OK
[HOOK - conan-center.py] pre_export(): [CONAN CENTER INDEX URL (KB-H027)] OK
[HOOK - conan-center.py] pre_export(): [CMAKE MINIMUM VERSION (KB-H028)] OK
[HOOK - conan-center.py] pre_export(): [TEST PACKAGE - RUN ENVIRONMENT (KB-H029)] OK
[HOOK - conan-center.py] pre_export(): [SYSTEM REQUIREMENTS (KB-H032)] OK
[HOOK - conan-center.py] pre_export(): [CONANDATA.YML FORMAT (KB-H030)] OK
[HOOK - conan-center.py] pre_export(): [TEST PACKAGE - NO IMPORTS() (KB-H034)] OK
[HOOK - conan-center.py] pre_export(): [NO AUTHOR (KB-H037)] OK
[HOOK - conan-center.py] pre_export(): [NO TARGET NAME (KB-H040)] OK
Exporting package recipe
flann/1.9.1 exports: File 'conandata.yml' found. Exporting it...
flann/1.9.1 exports: Copied 1 '.yml' file: conandata.yml
flann/1.9.1 exports_sources: Copied 1 '.txt' file: CMakeLists.txt
[HOOK - conan-center.py] post_export(): [CONANDATA.YML REDUCE (KB-H031)] Saving conandata.yml: {'sources': {'1.9.1': {'sha256': 'b23b5f4e71139faa3bcb39e6bbcc76967fbaf308c4ee9d4f5bfbeceaa76cc5d3', 'url': 'https://github.com/mariusmuja/flann/archive/1.9.1.tar.gz'}}}
[HOOK - conan-center.py] post_export(): [CONANDATA.YML REDUCE (KB-H031)] New conandata.yml contents: sources:
  1.9.1:
    sha256: b23b5f4e71139faa3bcb39e6bbcc76967fbaf308c4ee9d4f5bfbeceaa76cc5d3
    url: https://github.com/mariusmuja/flann/archive/1.9.1.tar.gz

[HOOK - conan-center.py] post_export(): [CONANDATA.YML REDUCE (KB-H031)] OK
flann/1.9.1: A new conanfile.py version was exported
flann/1.9.1: Folder: /tmp/c3ipr/pr_897_2_0_0/.conan/data/flann/1.9.1/_/_/export
flann/1.9.1: Using the exported files summary hash as the recipe revision: 1793d75da4a0f532e2a0dabf279bb679 
flann/1.9.1: Exported revision: 1793d75da4a0f532e2a0dabf279bb679
Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=5
os=Linux
os_build=Linux
[options]
flann:shared=True
[build_requires]
[env]

flann/1.9.1: Forced build from source
flann/1.9.1 (test package): Installing package
Requirements
    flann/1.9.1 from local cache - Cache
Packages
    flann/1.9.1:77d57cfe06671f8aa2a9c02a85cddc97f4090f9a - Build

[HOOK - conan-center.py] pre_source(): [IMMUTABLE SOURCES (KB-H010)] OK
flann/1.9.1: Configuring sources in /tmp/c3ipr/pr_897_2_0_0/.conan/data/flann/1.9.1/_/_/source

[HOOK - conan-center.py] post_source(): [LIBCXX MANAGEMENT (KB-H011)] OK
[HOOK - conan-center.py] post_source(): [CPPSTD MANAGEMENT (KB-H022)] OK
flann/1.9.1: Copying sources to build folder
flann/1.9.1: Building your package in /tmp/c3ipr/pr_897_2_0_0/.conan/data/flann/1.9.1/_/_/build/77d57cfe06671f8aa2a9c02a85cddc97f4090f9a
flann/1.9.1: Generator cmake created conanbuildinfo.cmake
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK. 'fPIC' option found and apparently well managed
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK
flann/1.9.1: Calling build()
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/g++
-- Check for working CXX compiler: /usr/bin/g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Conan: called by CMake conan helper
-- Conan: called inside local cache
-- Conan: Adjusting output directories
-- Conan: Using cmake global configuration
-- Conan: Adjusting default RPATHs Conan policies
-- Conan: Adjusting language standard
-- Conan: Adjusting fPIC flag (ON)
-- Conan: Compiler GCC>=5, checking major version 5
-- Conan: Checking correct version: 5
-- Conan: C++ stdlib: libstdc++
-- Found PythonInterp: /opt/pyenv/versions/3.7.5/bin/python (found version "3.7.5") 
-- Could NOT find HDF5 (missing: HDF5_LIBRARIES HDF5_INCLUDE_DIRS) (found version "")
CMake Warning at source_subfolder/CMakeLists.txt:78 (message):
  hdf5 library not found, some tests will not be run


-- Could NOT find GTest (missing: GTEST_LIBRARY GTEST_INCLUDE_DIR GTEST_MAIN_LIBRARY) 
CMake Warning at source_subfolder/CMakeLists.txt:117 (message):
  gtest library not found, some tests will not be run


-- Found OpenMP_C: -fopenmp (found version "4.0") 
-- Found OpenMP_CXX: -fopenmp (found version "4.0") 
-- Found OpenMP: TRUE (found version "4.0")  
-- Install prefix: /tmp/c3ipr/pr_897_2_0_0/.conan/data/flann/1.9.1/_/_/package/77d57cfe06671f8aa2a9c02a85cddc97f4090f9a
-- Build type: Release
-- Building C bindings: OFF
-- Building examples: OFF
-- Building tests: OFF
-- Building documentation: OFF
-- Building python bindings: OFF
-- Building matlab bindings: OFF
-- Building CUDA library: OFF
-- Using OpenMP support: ON
-- Using MPI support: OFF
-- Configuring done
CMake Error at source_subfolder/src/cpp/CMakeLists.txt:32 (add_library):
  Cannot find source file:

    empty.cpp

  Tried extensions .c .C .c++ .cc .cpp .cxx .cu .m .M .mm .h .hh .h++ .hm
  .hpp .hxx .in .txx


CMake Error at source_subfolder/src/cpp/CMakeLists.txt:32 (add_library):
  No SOURCES given to target: flann_cpp


CMake Generate step failed.  Build files cannot be regenerated correctly.
flann/1.9.1: 

JSON file created at '/tmp/c3ipr/pr_897_2_0_0/_create.json'