Martin Storsjö 7af584ed87 [libunwind] Try to add --unwindlib=none while configuring and building libunwind ... If Clang is set up to link directly against libunwind (via the --unwindlib option, or the corresponding builtin default option), configuring libunwind will fail while bootstrapping (before the initial libunwind is built), because every cmake test will fail due to -lunwind not being found, and linking the shared library will fail similarly. Check if --unwindlib=none is supported, and add it in that case. Using check_c_compiler_flag on its own doesn't work, because that only adds the tested flag to the compilation command, and if -lunwind is missing, the linking step would still fail - instead try adding it to CMAKE_REQUIRED_FLAGS and restore the variable if it doesn't work. This avoids having to pass --unwindlib=none while building libunwind. Differential Revision: https://reviews.llvm.org/D112126		2021-11-05 10:10:19 +02:00
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Modules	[CMake] Cache the compiler-rt library search results	2021-10-27 17:53:03 -07:00
config-ix.cmake	[libunwind] Try to add --unwindlib=none while configuring and building libunwind	2021-11-05 10:10:19 +02:00