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Simplify CMake rules in HandleLLVMOptions module.

Browse Source 
Summary: No functionality change.

Reviewers: Bigcheese

Reviewed By: Bigcheese

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D535

llvm-svn: 176973
This commit is contained in:
Alexey Samsonov 2013-03-13 20:50:23 +00:00
parent 6f984e6349
commit d3b3578c23
1 changed files with 26 additions and 27 deletions
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53
cmake/modules/HandleLLVMOptions.cmake
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@ -59,6 +59,24 @@ else(WIN32)
endif(UNIX)
endif(WIN32)
function(add_flag_or_print_warning flag)
check_c_compiler_flag(${flag} C_SUPPORTS_${flag})
check_cxx_compiler_flag(${flag} CXX_SUPPORTS_${flag})
if (C_SUPPORTS_${flag} AND CXX_SUPPORTS_${flag})
message(STATUS "Building with ${flag}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" PARENT_SCOPE)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" PARENT_SCOPE)
else()
message(WARNING "${flag} is not supported.")
endif()
endfunction()
function(append_if variable value condition)
if (${condition})
set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
endif()
endfunction()
if( LLVM_ENABLE_PIC )
if( XCODE )
# Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't
@ -67,23 +85,14 @@ if( LLVM_ENABLE_PIC )
elseif( WIN32 OR CYGWIN)
# On Windows all code is PIC. MinGW warns if -fPIC is used.
else()
check_cxx_compiler_flag("-fPIC" SUPPORTS_FPIC_FLAG)
if( SUPPORTS_FPIC_FLAG )
message(STATUS "Building with -fPIC")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
else( SUPPORTS_FPIC_FLAG )
message(WARNING "-fPIC not supported.")
endif()
add_flag_or_print_warning("-fPIC")
if( WIN32 OR CYGWIN)
# MinGW warns if -fvisibility-inlines-hidden is used.
else()
check_cxx_compiler_flag("-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG)
if( SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG )
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility-inlines-hidden")
endif()
endif()
append_if(CMAKE_CXX_FLAGS "-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG)
endif()
endif()
endif()
@ -194,24 +203,14 @@ elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
if (LLVM_ENABLE_PEDANTIC)
add_llvm_definitions( -pedantic -Wno-long-long )
check_cxx_compiler_flag("-Werror -Wnested-anon-types" CXX_SUPPORTS_NO_NESTED_ANON_TYPES_FLAG)
if( CXX_SUPPORTS_NO_NESTED_ANON_TYPES_FLAG )
set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-nested-anon-types" )
endif()
append_if(CMAKE_CXX_FLAGS "-Wno-nested-anon-types" CXX_SUPPORTS_NO_NESTED_ANON_TYPES_FLAG)
endif (LLVM_ENABLE_PEDANTIC)
check_cxx_compiler_flag("-Werror -Wcovered-switch-default" CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG)
if( CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG )
set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wcovered-switch-default" )
endif()
append_if(CMAKE_CXX_FLAGS "-Wcovered-switch-default" CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG)
check_c_compiler_flag("-Werror -Wcovered-switch-default" C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG)
if( C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG )
set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wcovered-switch-default" )
endif()
if (USE_NO_UNINITIALIZED)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-uninitialized")
endif()
if (USE_NO_MAYBE_UNINITIALIZED)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-maybe-uninitialized")
endif()
append_if(CMAKE_C_FLAGS "-Wcovered-switch-default" C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG)
append_if(CMAKE_CXX_FLAGS "-Wno-uninitialized" USE_NO_UNINITIALIZED)
append_if(CMAKE_CXX_FLAGS "-Wno-maybe-uninitialized" USE_NO_MAYBE_UNINITIALIZED)
endif (LLVM_ENABLE_WARNINGS)
if (LLVM_ENABLE_WERROR)
add_llvm_definitions( -Werror )