I have a C++ library packaged with conan and it contains a test_package with a conanfile.py that uses the new conan 2.0 self.requries(self.tested_reference_str) and test_type = "explicit".
When not cross-building everything runs fine. I can build the library using conan build . and build and run the consumer test_package.
In case of cross-building, the main library can be built without issues. However, the build of the test_package fails with:
----Running------
> . "/work/tests/test_package/build/generators/conanbuild.sh" && cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE="/work/tests/test_package/build/generators/conan_toolchain.cmake" -DCMAKE_POLICY_DEFAULT_CMP0091="NEW" -DCMAKE_BUILD_TYPE="Release" "/work/tests/test_package/."
-----------------
-- Using Conan toolchain: /work/tests/test_package/build/generators/conan_toolchain.cmake
-- The CXX compiler identification is GNU 11.3.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - failed
-- Check for working CXX compiler: /opt/poky/4.0.5/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-g++
-- Check for working CXX compiler: /opt/poky/4.0.5/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-g++ - broken
CMake Error at /opt/poky/4.0.5/sysroots/x86_64-pokysdk-linux/usr/share/cmake-3.22/Modules/CMakeTestCXXCompiler.cmake:62 (message):
The C++ compiler
"/opt/poky/4.0.5/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-g++"
is not able to compile a simple test program.
It fails with the following output:
Change Dir: /work/tests/test_package/build/Release/CMakeFiles/CMakeTmp
Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_8ea64/fast && /usr/bin/gmake -f CMakeFiles/cmTC_8ea64.dir/build.make CMakeFiles/cmTC_8ea64.dir/build
gmake[1]: Entering directory '/work/tests/test_package/build/Release/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_8ea64.dir/testCXXCompiler.cxx.o
/opt/poky/4.0.5/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-g++ -O2 -pipe -g -feliminate-unused-debug-types -stdlib=libstdc++ -o CMakeFiles/cmTC_8ea64.dir/testCXXCompiler.cxx.o -c /work/tests/test_package/build/Release/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
arm-poky-linux-gnueabi-g++: error: unrecognized command-line option ‘-stdlib=libstdc++’
gmake[1]: *** [CMakeFiles/cmTC_8ea64.dir/build.make:78: CMakeFiles/cmTC_8ea64.dir/testCXXCompiler.cxx.o] Error 1
gmake[1]: Leaving directory '/work/tests/test_package/build/Release/CMakeFiles/CMakeTmp'
gmake: *** [Makefile:127: cmTC_8ea64/fast] Error 2
CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
CMakeLists.txt:2 (project)
host profile:
[settings]
os=Linux
arch=armv7hf
compiler=clang
compiler.version=14
# Tried also with libc++
compiler.libcxx=libstdc++11
build_type=Release
build profile:
[settings]
os=Linux
arch=x86_64
compiler=gcc
compiler.version=11
# Without the following the error becomes:
# arm-poky-linux-gnueabi-g++: error: unrecognized command-line option ‘-stdlib=libc++’
compiler.libcxx=libstdc++11
build_type=Release
[env]
CC=gcc-11
CXX=g++-11
Any idea why cross compiling works for the library itself but the test_package fails?
Edit: I looked into conaninfo.txt, CMakeCache.txt, for both: the library generated files and the test_package generated files. Conan specifies the clang compiler in both cases (library build and test_package) but CMake uses anyway the GNU compiler for the test_package. It seems the CMAKE_CXX_COMPILER is not passed correctly to CMake in case of the test_package. A conan install inside the test_package folder also results in the wrong compiler (GNU) being used.