caiyu/gmio
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cmake: group non-ANSI checks within "if(NOT BUILD_STRICT_C90)"

Browse Source
This commit is contained in:
Hugues Delorme 2015-04-02 09:38:08 +02:00
parent 6d962f7035
commit 35359a2580
1 changed files with 32 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
CMakeLists.txt
View File

@ -43,7 +43,7 @@ test_big_endian(GMIO_HOST_IS_BIG_ENDIAN)
# It must be done before checking of C99 and POSIX features
if(BUILD_STRICT_C90)
if(CMAKE_COMPILER_IS_GNUCC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ansi")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ansi -pedantic-errors")
elseif(MSVC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /Za")
endif()
@ -54,58 +54,60 @@ set(CMAKE_REQUIRED_FLAGS "${CMAKE_C_FLAGS}")
# Some compilers (like GCC v4.9) don't disable <stdint.h> in STRICT_ANSI mode
check_include_files(stdint.h GMIO_HAVE_STDINT_H)
check_include_files(sys/types.h GMIO_HAVE_SYS_TYPES_H)
check_include_files(sys/stat.h GMIO_HAVE_SYS_STAT_H)
check_function_exists(fileno GMIO_HAVE_POSIX_FILENO_FUNC)
check_function_exists(fstat64 GMIO_HAVE_POSIX_FSTAT64_FUNC)
if(WIN32)
check_function_exists(_fstat64 GMIO_HAVE_WIN__FSTAT64_FUNC)
endif()
# Check available C99 and compiler/OS specific features
# Check non-ANSI available features
if(NOT BUILD_STRICT_C90)
# Check C99 features
check_function_exists(strtof GMIO_HAVE_STRTOF_FUNC)
check_function_exists(powf GMIO_HAVE_POWF_FUNC)
check_include_files(stdbool.h GMIO_HAVE_STDBOOL_H)
# Check POSIX features
check_include_files(sys/types.h GMIO_HAVE_SYS_TYPES_H)
check_include_files(sys/stat.h GMIO_HAVE_SYS_STAT_H)
check_function_exists(fileno GMIO_HAVE_POSIX_FILENO_FUNC)
check_function_exists(fstat64 GMIO_HAVE_POSIX_FSTAT64_FUNC)
if(WIN32)
check_function_exists(_fstat64 GMIO_HAVE_WIN__FSTAT64_FUNC)
endif()
# Have BSD-like alloca() function ?
check_c_source_compiles(
"#include <alloca.h>
int main() { void* ptr = alloca(256); return 0; }"
GMIO_HAVE_BSD_ALLOCA_FUNC)
# Have Win32 _alloca() function ?
if(WIN32)
# Have Win32 _alloca() function ?
check_c_source_compiles(
"#include <malloc.h>
int main() { void* ptr = _alloca(256); return 0; }"
GMIO_HAVE_WIN__ALLOCA_FUNC)
endif() # WIN32
endif()
endif()
# Have builtin byte swap functions ?
if(CMAKE_COMPILER_IS_GNUCC)
# __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(
"int main() { return (int)__builtin_bswap16(0x1122); }"
GMIO_HAVE_GCC_BUILTIN_BSWAP16_FUNC)
check_c_source_compiles(
"int main() { return (int)__builtin_bswap32(0x11223344); }"
GMIO_HAVE_GCC_BUILTIN_BSWAP32_FUNC)
elseif(MSVC)
check_c_source_compiles(
"#include <stdlib.h>
int main() { return (int)_byteswap_ulong(0x11223344); }"
GMIO_HAVE_MSVC_BUILTIN_BSWAP_FUNC)
endif()
# Have builtin byte swap functions ?
if(CMAKE_COMPILER_IS_GNUCC)
# __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(
"int main() { return (int)__builtin_bswap16(0x1122); }"
GMIO_HAVE_GCC_BUILTIN_BSWAP16_FUNC)
check_c_source_compiles(
"int main() { return (int)__builtin_bswap32(0x11223344); }"
GMIO_HAVE_GCC_BUILTIN_BSWAP32_FUNC)
elseif(MSVC)
check_c_source_compiles(
"#include <stdlib.h>
int main() { return (int)_byteswap_ulong(0x11223344); }"
GMIO_HAVE_MSVC_BUILTIN_BSWAP_FUNC)
endif()
endif() # !BUILD_STRICT_C90
configure_file(src/gmio_core/config.h.cmake config.h @ONLY)
include_directories(${CMAKE_BINARY_DIR}) # For generated "config.h"
# Specific flags for GCC
if(CMAKE_COMPILER_IS_GNUCC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pedantic-errors -fstrict-aliasing")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstrict-aliasing")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Winline -Wextra -Wstrict-aliasing -Wcast-align -Wlogical-op -Wfloat-equal")
# Force PIC for GCC, see : https://www.gentoo.org/proj/en/base/amd64/howtos/index.xml?part=1&chap=3