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| author | Francis Ricci <francisjricci@gmail.com> | 2017-01-09 03:51:42 +0000 |
|---|---|---|
| committer | Francis Ricci <francisjricci@gmail.com> | 2017-01-09 03:51:42 +0000 |
| commit | ae4b8805fdce22aacb5644520c4dc42ce2656ebf (patch) | |
| tree | 77e6862afbfa593d23c5069cfd364d3334be406a /cmake/Modules | |
| parent | cf0113c530ec1a9e44a3fcec909ee10725df5347 (diff) | |
Enable weak hooks on darwin
Summary:
By default, darwin requires a definition for weak interface functions at
link time. Adding the '-U' link flag with each weak function allows these
weak interface functions to be used without definitions, which mirrors
behavior on linux and windows.
Reviewers: compnerd, eugenis
Subscribers: kubabrecka, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D28203
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@291417 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'cmake/Modules')
| -rw-r--r-- | cmake/Modules/SanitizerUtils.cmake | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/cmake/Modules/SanitizerUtils.cmake b/cmake/Modules/SanitizerUtils.cmake index c66083c24..3e1a6346e 100644 --- a/cmake/Modules/SanitizerUtils.cmake +++ b/cmake/Modules/SanitizerUtils.cmake @@ -46,6 +46,17 @@ macro(add_sanitizer_rt_symbols name) endforeach() endmacro() +# This function is only used on Darwin, where undefined symbols must be specified +# in the linker invocation. +function(add_weak_symbols libname linkflags) + file(STRINGS "${COMPILER_RT_SOURCE_DIR}/lib/${libname}/weak_symbols.txt" WEAK_SYMBOLS) + set(local_linkflags ${${linkflags}}) + foreach(SYMBOL ${WEAK_SYMBOLS}) + set(local_linkflags ${local_linkflags} -Wl,-U,${SYMBOL}) + endforeach() + set(${linkflags} ${local_linkflags} PARENT_SCOPE) +endfunction() + macro(add_sanitizer_rt_version_list name) set(vers ${CMAKE_CURRENT_BINARY_DIR}/${name}.vers) cmake_parse_arguments(ARG "" "" "LIBS;EXTRA" ${ARGN}) |