diff options
| -rw-r--r-- | kde-modules/KDECompilerSettings.cmake | 26 | ||||
| -rw-r--r-- | kde-modules/KDEFrameworkCompilerSettings.cmake | 1 |
2 files changed, 26 insertions, 1 deletions
diff --git a/kde-modules/KDECompilerSettings.cmake b/kde-modules/KDECompilerSettings.cmake index 1c3b3715..872edf18 100644 --- a/kde-modules/KDECompilerSettings.cmake +++ b/kde-modules/KDECompilerSettings.cmake @@ -135,7 +135,6 @@ on a target that has source files in a language other than C++. Enables exceptions for C++ source files compiled for the CMakeLists.txt file in the current directory and all subdirectories. - Example usages: .. code-block:: cmake @@ -184,6 +183,19 @@ Example usages: -DQT_NO_FOREACH ) +Inclusion of this module defines the following variables: + +``ENABLE_BSYMBOLICFUNCTIONS`` + indicates whether we make use of -Bsymbolic-functions for linking. + It ensures libraries bind global function references locally rather than + at runtime. + This option only has an effect on ELF-based systems. + + The option is disabled by default except when using + KDEFrameworkCompilerSettings.cmake where it's enabled. Projects can enable + it by calling set(ENABLE_BSYMBOLICFUNCTIONS ON) or passing -DENABLE + BSYMBOLICFUNCTIONS=ON when configuring the build directory. + Since pre-1.0.0. #]=======================================================================] @@ -584,6 +596,18 @@ if (MSVC) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4661") endif() +option(ENABLE_BSYMBOLICFUNCTIONS "Make use of -Bsymbolic-functions" OFF) +if (ENABLE_BSYMBOLICFUNCTIONS) + set(_SYMBOLIC_FUNCTIONS_COMPILER_OPTION "-Wl,-Bsymbolic-functions") + list(APPEND CMAKE_REQUIRED_LIBRARIES "${_SYMBOLIC_FUNCTIONS_COMPILER_OPTION}") + check_cxx_source_compiles( "int main () { return 0; }" BSYMBOLICFUNCTIONS_AVAILABLE ) + list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES "${_SYMBOLIC_FUNCTIONS_COMPILER_OPTION}") + if (BSYMBOLICFUNCTIONS_AVAILABLE) + set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${_SYMBOLIC_FUNCTIONS_COMPILER_OPTION}") + set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${_SYMBOLIC_FUNCTIONS_COMPILER_OPTION}") + endif() +endif() + if (WIN32) # Disable deprecation warnings for some API # FIXME: do we really want this? diff --git a/kde-modules/KDEFrameworkCompilerSettings.cmake b/kde-modules/KDEFrameworkCompilerSettings.cmake index d7165f57..6b17fde9 100644 --- a/kde-modules/KDEFrameworkCompilerSettings.cmake +++ b/kde-modules/KDEFrameworkCompilerSettings.cmake @@ -38,6 +38,7 @@ if (NOT CMAKE_CXX_STANDARD) endif() set(KDE_COMPILERSETTINGS_LEVEL 5.84.0) +set(ENABLE_BSYMBOLICFUNCTIONS ON) include(KDECompilerSettings NO_POLICY_SCOPE) add_definitions(-DQT_NO_CAST_TO_ASCII |