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conan install autoconf/2.71@ --profile=/home/conan/w/BuildSingleReference/11499/4a36a2de-59cd-4dfe-9d89-026bcb68bce8/profile.txt --build=autoconf
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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]

autoconf/2.71: Forced build from source
Installing package: autoconf/2.71
Requirements
    autoconf/2.71 from local cache - Cache
    m4/1.4.18 from 'conan-center' - Cache
Packages
    autoconf/2.71:cb054d0b3e1ca595dc66bc2339d40f1f8f04ab31 - Build
    m4/1.4.18:24647d9fe8ec489125dfbae4b3ebefaf7581674c - Cache

Installing (downloading, building) binaries...
m4/1.4.18: Already installed!
m4/1.4.18: Appending PATH environment variable: /home/conan/w/BuildSingleReference/.conan/data/m4/1.4.18/_/_/package/24647d9fe8ec489125dfbae4b3ebefaf7581674c/bin
m4/1.4.18: Setting M4 environment variable: /home/conan/w/BuildSingleReference/.conan/data/m4/1.4.18/_/_/package/24647d9fe8ec489125dfbae4b3ebefaf7581674c/bin/m4
[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
autoconf/2.71: Copying sources to build folder
autoconf/2.71: Building your package in /home/conan/w/BuildSingleReference/.conan/data/autoconf/2.71/_/_/build/cb054d0b3e1ca595dc66bc2339d40f1f8f04ab31
autoconf/2.71: Generator txt created conanbuildinfo.txt
[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
autoconf/2.71: Calling build()
patches/2.71-0006-autoconf-trailer_m4-from-uppercase-env.patch: source/target file does not exist:
  --- b'bin/autoconf.in'
  +++ b'bin/autoconf.in'
autoconf/2.71: 
m4/1.4.18: WARN: Lib folder doesn't exist, can't collect libraries: /home/conan/w/BuildSingleReference/.conan/data/m4/1.4.18/_/_/package/24647d9fe8ec489125dfbae4b3ebefaf7581674c/lib
autoconf/2.71: WARN: Build folder is dirty, removing it: /home/conan/w/BuildSingleReference/.conan/data/autoconf/2.71/_/_/build/cb054d0b3e1ca595dc66bc2339d40f1f8f04ab31
autoconf/2.71: ERROR: Package 'cb054d0b3e1ca595dc66bc2339d40f1f8f04ab31' build failed
autoconf/2.71: WARN: Build folder /home/conan/w/BuildSingleReference/.conan/data/autoconf/2.71/_/_/build/cb054d0b3e1ca595dc66bc2339d40f1f8f04ab31
ERROR: autoconf/2.71: Error in build() method, line 66
	self._patch_files()
while calling '_patch_files', line 63
	tools.patch(**patch)
	ConanException: Failed to apply patch: patches/2.71-0006-autoconf-trailer_m4-from-uppercase-env.patch