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| author | Alexander Grund <alexander.grund@tu-dresden.de> | 2019-12-09 08:42:40 (GMT) |
|---|---|---|
| committer | Brad King <brad.king@kitware.com> | 2019-12-09 16:37:40 (GMT) |
| commit | 958f858ad815024550b22eeaac02f183f8d646fd (patch) | |
| tree | bc7f997717889ad688b637db6c6cb609c11a8fff | |
| parent | 8c7b7df788851358392e4a00faf00bc2a674c3a6 (diff) | |
| download | CMake-958f858ad815024550b22eeaac02f183f8d646fd.zip CMake-958f858ad815024550b22eeaac02f183f8d646fd.tar.gz CMake-958f858ad815024550b22eeaac02f183f8d646fd.tar.bz2 | |
Check for support before adding bigtoc linker flag
Fixes: #20076
| -rw-r--r-- | CompileFlags.cmake | 12 | ||||
| -rw-r--r-- | Source/Modules/CheckCXXLinkerFlag.cmake | 29 |
2 files changed, 39 insertions, 2 deletions
diff --git a/CompileFlags.cmake b/CompileFlags.cmake index 91f2adf..053259f 100644 --- a/CompileFlags.cmake +++ b/CompileFlags.cmake @@ -54,12 +54,20 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "^parisc") endif() # Workaround for TOC Overflow on ppc64 +set(bigTocFlag "") if(CMAKE_SYSTEM_NAME STREQUAL "AIX" AND CMAKE_SYSTEM_PROCESSOR MATCHES "powerpc") - set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-bbigtoc") + set(bigTocFlag "-Wl,-bbigtoc") elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" AND CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64") - set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--no-multi-toc") + set(bigTocFlag "-Wl,--no-multi-toc") +endif() +if(bigTocFlag) + include(CheckCXXLinkerFlag) + check_cxx_linker_flag(${bigTocFlag} BIG_TOC_FLAG_SUPPORTED) + if(BIG_TOC_FLAG_SUPPORTED) + set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${bigTocFlag}") + endif() endif() if (CMAKE_CXX_COMPILER_ID STREQUAL SunPro AND diff --git a/Source/Modules/CheckCXXLinkerFlag.cmake b/Source/Modules/CheckCXXLinkerFlag.cmake new file mode 100644 index 0000000..6cb1ba3 --- /dev/null +++ b/Source/Modules/CheckCXXLinkerFlag.cmake @@ -0,0 +1,29 @@ +# Distributed under the OSI-approved BSD 3-Clause License. See accompanying +# file Copyright.txt or https://cmake.org/licensing for details. + +include_guard(GLOBAL) +include(CheckCXXSourceCompiles) +include(CMakeCheckCompilerFlagCommonPatterns) + +function(check_cxx_linker_flag _flag _var) + if(CMAKE_VERSION VERSION_LESS "3.14") + set(CMAKE_REQUIRED_LIBRARIES "${_flag}") + else() + set(CMAKE_REQUIRED_LINK_OPTIONS "${_flag}") + endif() + + # Normalize locale during test compilation. + set(_locale_vars LC_ALL LC_MESSAGES LANG) + foreach(v IN LISTS _locale_vars) + set(_locale_vars_saved_${v} "$ENV{${v}}") + set(ENV{${v}} C) + endforeach() + check_compiler_flag_common_patterns(_common_patterns) + check_cxx_source_compiles("int main() { return 0; }" ${_var} + ${_common_patterns} + ) + foreach(v IN LISTS _locale_vars) + set(ENV{${v}} ${_locale_vars_saved_${v}}) + endforeach() + set(${_var} "${${_var}}" PARENT_SCOPE) +endfunction() |