depends: native_capnp picks system gcc, not CC/CXX #33859
Description
native_capnp seems to ignore the CC/CXX settings. This leads to compile failures on distros that come with an older GCC, such as RHEL-based Linux 8, or the latest OpenSuse Leap:
# ( cd depends && make CC=clang CXX=clang++ -j $(nproc) )
Configuring native_capnp...
-- The CXX compiler identification is GNU 7.5.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - failed
-- Check for working CXX compiler: /usr/bin/g++
-- Check for working CXX compiler: /usr/bin/g++ - broken
CMake Error at /usr/share/cmake/Modules/CMakeTestCXXCompiler.cmake:60 (message):
The C++ compiler
"/usr/bin/g++"