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cmake: improve suppport of Clang

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This commit is contained in:
Hugues Delorme 2015-06-29 12:26:47 +02:00
parent f02529a411
commit 5219c289aa
1 changed files with 10 additions and 5 deletions
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15
CMakeLists.txt
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@ -29,6 +29,11 @@ set(GMIO_VERSION
#set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
# Detect Clang
if (CMAKE_C_COMPILER MATCHES ".*clang")
set(CMAKE_COMPILER_IS_CLANG 1)
endif ()
# Options
option(BUILD_SHARED_LIBS "Build shared libraries (DLL)" OFF)
option(BUILD_STRICT_C90 "Build with strict conformance to C90 standard" OFF)
@ -48,7 +53,7 @@ test_big_endian(GMIO_HOST_IS_BIG_ENDIAN)
# Adapt C compiler flags to satisfy the BUILD_STRICT_C90 option
# It must be done before checking of C99 and POSIX features
if(BUILD_STRICT_C90)
if(CMAKE_COMPILER_IS_GNUCC)
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ansi -pedantic-errors")
elseif(MSVC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /Za")
@ -65,7 +70,7 @@ if(NOT BUILD_STRICT_C90)
# Check C99 features
check_function_exists(strtof GMIO_HAVE_STRTOF_FUNC)
if(CMAKE_COMPILER_IS_GNUCC)
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG)
list(APPEND CMAKE_REQUIRED_LIBRARIES m) # -lm
endif()
check_function_exists(powf GMIO_HAVE_POWF_FUNC)
@ -121,7 +126,7 @@ if(NOT BUILD_STRICT_C90)
endif()
# Have builtin byte swap functions ?
if(CMAKE_COMPILER_IS_GNUCC)
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG)
# __builtin_bswap16() is missing in x86 GCC version prior to v4.7
# See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624
check_c_source_compiles(
@ -143,7 +148,7 @@ configure_file(src/gmio_core/config.h.cmake config.h @ONLY)
include_directories(${CMAKE_BINARY_DIR}) # For generated header files
# Specific flags for GCC
if(CMAKE_COMPILER_IS_GNUCC)
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstrict-aliasing")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wstrict-aliasing")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wcast-align -Wlogical-op -Wfloat-equal")
@ -286,7 +291,7 @@ add_executable(
src/gmio_stl/internal/stlb_byte_swap.c
src/gmio_stl/internal/stlb_write.c)
if(CMAKE_COMPILER_IS_GNUCC)
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_CLANG)
target_link_libraries(test_internal m) # -lm
endif()