Andrey Semashev wrote:
But that would mean one has to specify second order dependencies as well for configure checks.
¯\_(ツ)_/¯
I'm not sure I understand. Is it that Cygwin doesn't accept angle brackets with Windows paths?
The Cygwin compiler just doesn't accept Windows paths, as far as I can see. Performing C++ SOURCE FILE Test BOOST_FILESYSTEM_HAS_STAT_ST_BLKSIZE failed with the following output: Change Dir: C:/boost-git/develop/__build_gcc/CMakeFiles/CMakeTmp Run Build Command(s):C:/cygwin64/bin/make.exe -f Makefile cmTC_8f9df/fast && /usr/bin/make -f CMakeFiles/cmTC_8f9df.dir/build.make CMakeFiles/cmTC_8f9df.dir/build make[1]: Entering directory '/cygdrive/c/boost-git/develop/__build_gcc/CMakeFiles/CMakeTmp' Building CXX object CMakeFiles/cmTC_8f9df.dir/src.cxx.obj C:/cygwin64/bin/c++.exe -DBOOST_FILESYSTEM_HAS_STAT_ST_BLKSIZE @CMakeFiles/cmTC_8f9df.dir/includes_CXX.rsp -o CMakeFiles/cmTC_8f9df.dir/src.cxx.obj -c C:/boost-git/develop/__build_gcc/CMakeFiles/CMakeTmp/src.cxx C:/boost-git/develop/__build_gcc/CMakeFiles/CMakeTmp/src.cxx:1:10: fatal error: C:/boost-git/develop/libs/filesystem/config/has_stat_st_blksize.cpp: No such file or directory 1 | #include <C:/boost-git/develop/libs/filesystem/config/has_stat_st_blksize.cpp> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ compilation terminated. make[1]: *** [CMakeFiles/cmTC_8f9df.dir/build.make:79: CMakeFiles/cmTC_8f9df.dir/src.cxx.obj] Error 1 make[1]: Leaving directory '/cygdrive/c/boost-git/develop/__build_gcc/CMakeFiles/CMakeTmp' make: *** [Makefile:127: cmTC_8f9df/fast] Error 2 Source file was: #include <C:/boost-git/develop/libs/filesystem/config/has_stat_st_blksize.cpp>