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Improve detection for linker flags

This commit is contained in:
Gunnar Beutner 2017-12-24 07:27:57 +01:00
parent ec061a9538
commit 32e178bb5f
1 changed files with 51 additions and 7 deletions
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58
CMakeLists.txt
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@ -147,8 +147,8 @@ include_directories(
set(CMAKE_MACOSX_RPATH 1)
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Qunused-arguments -g")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Qunused-arguments -g")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Qunused-arguments -fcolor-diagnostics")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Qunused-arguments -fcolor-diagnostics")
# Clang on Fedora requires -pthread, Apple Clang does not
# AppleClang is available since CMake 3.0.0
@ -176,15 +176,59 @@ if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -pthread")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -pthread")
endif()
if(NOT CMAKE_SYSTEM_NAME MATCHES AIX AND NOT CMAKE_SYSTEM_NAME MATCHES OpenBSD AND NOT CMAKE_SYSTEM_NAME MATCHES SunOS)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections -Wl,--no-export-dynamic -Bsymbolic-functions -Wl,--dynamic-list-cpp-typeinfo -Wl,--dynamic-list-data")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--gc-sections -Wl,--no-export-dynamic -Bsymbolic-functions -Wl,--dynamic-list-cpp-typeinfo -Wl,--dynamic-list-data")
endif()
endif()
include(CheckCXXCompilerFlag)
function(check_cxx_linker_flag flag var)
set(CMAKE_REQUIRED_FLAGS ${flag})
set(result 0)
check_cxx_compiler_flag(${flag} result)
set(${var} ${result} PARENT_SCOPE)
endfunction()
check_cxx_linker_flag("-Wl,--gc-sections" LD_GC_SECTIONS)
if(LD_GC_SECTIONS)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--gc-sections")
endif()
check_cxx_linker_flag("-Wl,--no-export-dynamic" LD_NO_EXPORT_DYNAMIC)
if(LD_NO_EXPORT_DYNAMIC)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--no-export-dynamic")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--no-export-dynamic")
endif()
check_cxx_linker_flag("-Bsymbolic-functions" LD_SYMBOLIC_FUNCTIONS)
if(LD_SYMBOLIC_FUNCTIONS)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Bsymbolic-functions")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Bsymbolic-functions")
endif()
check_cxx_linker_flag("-Wl,--dynamic-list-cpp-typeinfo" LD_DYNAMIC_LIST_CPP_TYPEINFO)
if(LD_DYNAMIC_LIST_CPP_TYPEINFO)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--dynamic-list-cpp-typeinfo")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--dynamic-list-cpp-typeinfo")
endif()
check_cxx_linker_flag("-Wl,--dynamic-list-data" LD_DYNAMIC_LIST_DATA)
if(LD_DYNAMIC_LIST_DATA)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--dynamic-list-data")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--dynamic-list-data")
endif()
check_cxx_compiler_flag("-Winvalid-pch" CXX_INVALID_PCH)
if(CXX_INVALID_PCH)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Winvalid-pch")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Winvalid-pch")
endif()
if(ICINGA2_LTO_BUILD)
check_cxx_compiler_flag("-flto" CXX_FLAG_LTO)