diff options
Diffstat (limited to 'Modules/Compiler/GNU.cmake')
| -rw-r--r-- | Modules/Compiler/GNU.cmake | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Modules/Compiler/GNU.cmake b/Modules/Compiler/GNU.cmake index 4491d4b..688a1b5 100644 --- a/Modules/Compiler/GNU.cmake +++ b/Modules/Compiler/GNU.cmake @@ -9,6 +9,7 @@ endif() set(__COMPILER_GNU 1) include(Compiler/CMakeCommonCompilerMacros) +include(Internal/CMakeCheckCompilerFlag) macro(__compiler_gnu lang) # Feature flags. @@ -16,6 +17,21 @@ macro(__compiler_gnu lang) set(CMAKE_${lang}_COMPILE_OPTIONS_PIC "-fPIC") if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.4) set(CMAKE_${lang}_COMPILE_OPTIONS_PIE "-fPIE") + # Support of PIE at link stage depends on various elements : platform, compiler, linker + # so the easiest way is to check if compiler supports these flags + cmake_check_compiler_flag(${lang} "${CMAKE_${lang}_COMPILE_OPTIONS_PIE};-pie" + CMAKE_${lang}_FLAG_PIE) + if (CMAKE_${lang}_FLAG_PIE) + set(CMAKE_${lang}_LINK_OPTIONS_PIE ${CMAKE_${lang}_COMPILE_OPTIONS_PIE} "-pie") + else() + set(CMAKE_${lang}_LINK_OPTIONS_PIE "") + endif() + cmake_check_compiler_flag(${lang} "-no-pie" CMAKE_${lang}_FLAG_NO_PIE) + if (CMAKE_${lang}_FLAG_NO_PIE) + set(CMAKE_${lang}_LINK_OPTIONS_NO_PIE "-no-pie") + else() + set(CMAKE_${lang}_LINK_OPTIONS_NO_PIE "") + endif() endif() if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4.0) set(CMAKE_${lang}_COMPILE_OPTIONS_VISIBILITY "-fvisibility=") |