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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-09-25 21:46:24 +0000 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-09-25 21:46:24 +0000 |
| commit | 6023cf223446e3f7038d4b867635f47b2d26e194 (patch) | |
| tree | 18119e373e0865acbdbb463631658046088aa221 /libcxxabi/cmake | |
| parent | 5e9cdeed778f0a62792b6dcfb6c3e990f67b315a (diff) | |
| download | llvm-6023cf223446e3f7038d4b867635f47b2d26e194.tar.gz | |
[libcxxabi] Fix arm build failer with libgcc
Both arm32 armv7/armv8 bots which do not use compiler-rt are failing
to a linking issue:
[100%] Built target cxxabi_static
CMakeFiles/cxxabi_shared.dir/cxa_demangle.cpp.o: In function `(anonymous namespace)::itanium_demangle::OutputStream::writeUnsigned(unsigned long long, bool)':
/home/buildslave/buildslave/libcxx-libcxxabi-libunwind-armv7-linux-noexceptions/llvm/projects/libcxxabi/src/demangle/Utility.h:55: undefined reference to `__aeabi_uldivmod'
/home/buildslave/buildslave/libcxx-libcxxabi-libunwind-armv7-linux-noexceptions/llvm/projects/libcxxabi/src/demangle/Utility.h:56: undefined reference to `__aeabi_uldivmod'
clang-6.0: error: linker command failed with exit code 1 (use -v to see invocation)
It seems after r371273 OutputStream is used more extensively and
is pulling OutputStream::writeUnsigned (which thus requires unsigned
integer module).
The straightfoward fix is to explicit link against libgcc if
compiler-rt is not used.
llvm-svn: 372921
Diffstat (limited to 'libcxxabi/cmake')
| -rw-r--r-- | libcxxabi/cmake/config-ix.cmake | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/libcxxabi/cmake/config-ix.cmake b/libcxxabi/cmake/config-ix.cmake index 9195dfc74e19..94f89bedd976 100644 --- a/libcxxabi/cmake/config-ix.cmake +++ b/libcxxabi/cmake/config-ix.cmake @@ -7,6 +7,7 @@ include(CheckCSourceCompiles) check_library_exists(c fopen "" LIBCXXABI_HAS_C_LIB) if (NOT LIBCXXABI_USE_COMPILER_RT) check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXXABI_HAS_GCC_S_LIB) + check_library_exists(gcc __aeabi_uldivmod "" LIBCXXABI_HAS_GCC_LIB) endif () # libc++abi is built with -nodefaultlibs, so we want all our checks to also @@ -26,8 +27,13 @@ if (LIBCXXABI_HAS_NODEFAULTLIBS_FLAG) list(APPEND CMAKE_REQUIRED_FLAGS -rtlib=compiler-rt) find_compiler_rt_library(builtins LIBCXXABI_BUILTINS_LIBRARY) list(APPEND CMAKE_REQUIRED_LIBRARIES "${LIBCXXABI_BUILTINS_LIBRARY}") - elseif (LIBCXXABI_HAS_GCC_S_LIB) - list(APPEND CMAKE_REQUIRED_LIBRARIES gcc_s) + else () + if (LIBCXXABI_HAS_GCC_S_LIB) + list(APPEND CMAKE_REQUIRED_LIBRARIES gcc_s) + endif () + if (LIBCXXABI_HAS_GCC_LIB) + list(APPEND CMAKE_REQUIRED_LIBRARIES gcc) + endif () endif () if (MINGW) # Mingw64 requires quite a few "C" runtime libraries in order for basic |