cmake: check all available compiler features even if BUILD_STRICT_C90
This commit is contained in:
Hugues Delorme
parent
43a296656d
commit
b6c9518e97
189
CMakeLists.txt
189
CMakeLists.txt
@ -75,7 +75,7 @@ include(TestBigEndian)
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test_big_endian(GMIO_HOST_IS_BIG_ENDIAN)
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test_big_endian(GMIO_HOST_IS_BIG_ENDIAN)
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# Adapt C compiler flags to satisfy the GMIO_BUILD_STRICT_C90 option
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# Adapt C compiler flags to satisfy the GMIO_BUILD_STRICT_C90 option
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# It must be done before checking of C99 and POSIX features
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# It must be done before checking non ANSI features(C99, POSIX, ...)
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if(GMIO_BUILD_STRICT_C90)
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if(GMIO_BUILD_STRICT_C90)
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if(CMAKE_C_COMPILER_IS_GCC_COMPATIBLE)
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if(CMAKE_C_COMPILER_IS_GCC_COMPATIBLE)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ansi -pedantic-errors")
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ansi -pedantic-errors")
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@ -97,113 +97,112 @@ endif()
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check_type_size("int" GMIO_SIZEOF_INT)
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check_type_size("int" GMIO_SIZEOF_INT)
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check_type_size("long" GMIO_SIZEOF_LONG)
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check_type_size("long" GMIO_SIZEOF_LONG)
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# Check non-ANSI available features
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# Check availability of a 64b integer type
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if(GMIO_HAVE_STDINT_H)
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set(CMAKE_REQUIRED_INCLUDES stdint.h)
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endif()
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check_type_size("int64_t" GMIO_SIZEOF_INT64_T)
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if(NOT HAVE_GMIO_SIZEOF_INT64_T)
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check_type_size("__int64" GMIO_SIZEOF_MSVC_INT64)
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if(NOT HAVE_GMIO_SIZEOF_MSVC_INT64)
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check_type_size("long long" GMIO_SIZEOF_LONG_LONG)
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endif()
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endif()
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set(CMAKE_REQUIRED_INCLUDES) # Pop changes
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if(HAVE_GMIO_SIZEOF_INT64_T)
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set(GMIO_HAVE_INT64_T ${HAVE_GMIO_SIZEOF_INT64_T})
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elseif(HAVE_GMIO_SIZEOF_MSVC_INT64)
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set(GMIO_HAVE_MSVC_INT64 ${HAVE_GMIO_SIZEOF_MSVC_INT64})
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elseif(HAVE_GMIO_SIZEOF_LONG_LONG)
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set(GMIO_HAVE_LONG_LONG ${HAVE_GMIO_SIZEOF_LONG_LONG})
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endif()
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# Check C99 features
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if(NOT GMIO_BUILD_STRICT_C90)
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if(NOT GMIO_BUILD_STRICT_C90)
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# Check availability of a 64b integer type
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if(GMIO_HAVE_STDINT_H)
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set(CMAKE_REQUIRED_INCLUDES stdint.h)
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endif()
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check_type_size("int64_t" GMIO_SIZEOF_INT64_T)
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if(NOT HAVE_GMIO_SIZEOF_INT64_T)
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check_type_size("__int64" GMIO_SIZEOF_MSVC_INT64)
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if(NOT HAVE_GMIO_SIZEOF_MSVC_INT64)
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check_type_size("long long" GMIO_SIZEOF_LONG_LONG)
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endif()
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endif()
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set(CMAKE_REQUIRED_INCLUDES)
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if(HAVE_GMIO_SIZEOF_INT64_T)
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set(GMIO_HAVE_INT64_T ${HAVE_GMIO_SIZEOF_INT64_T})
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elseif(HAVE_GMIO_SIZEOF_MSVC_INT64)
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set(GMIO_HAVE_MSVC_INT64 ${HAVE_GMIO_SIZEOF_MSVC_INT64})
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elseif(HAVE_GMIO_SIZEOF_LONG_LONG)
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set(GMIO_HAVE_LONG_LONG ${HAVE_GMIO_SIZEOF_LONG_LONG})
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endif()
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# Check C99 features
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check_function_exists(strtof GMIO_HAVE_STRTOF_FUNC)
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check_function_exists(strtof GMIO_HAVE_STRTOF_FUNC)
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if(CMAKE_C_COMPILER_IS_GCC_COMPATIBLE)
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if(CMAKE_C_COMPILER_IS_GCC_COMPATIBLE)
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list(APPEND CMAKE_REQUIRED_LIBRARIES m) # -lm
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list(APPEND CMAKE_REQUIRED_LIBRARIES m) # -lm
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endif()
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endif()
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check_function_exists(powf GMIO_HAVE_POWF_FUNC)
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check_function_exists(powf GMIO_HAVE_POWF_FUNC)
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set(CMAKE_REQUIRED_LIBRARIES)
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set(CMAKE_REQUIRED_LIBRARIES) # Pop changes
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check_include_files(stdbool.h GMIO_HAVE_STDBOOL_H)
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check_include_files(stdbool.h GMIO_HAVE_STDBOOL_H)
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endif()
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# Check POSIX features
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# Check POSIX features
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if(UNIX)
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if(UNIX)
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# See:
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# See:
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# http://linux.die.net/man/2/fstat64
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# http://linux.die.net/man/2/fstat64
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# https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man2/fstat.2.html
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# https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man2/fstat.2.html
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# https://www.gnu.org/software/libc/manual/html_mono/libc.html#Feature-Test-Macros
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# https://www.gnu.org/software/libc/manual/html_mono/libc.html#Feature-Test-Macros
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if(APPLE)
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if(APPLE)
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add_definitions(-D_DARWIN_USE_64_BIT_INODE)
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add_definitions(-D_DARWIN_USE_64_BIT_INODE)
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list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_DARWIN_USE_64_BIT_INODE)
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list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_DARWIN_USE_64_BIT_INODE)
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else()
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add_definitions(-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE=1)
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list(APPEND CMAKE_REQUIRED_DEFINITIONS
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-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE=1)
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endif()
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endif()
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set(GMIO_HAVE_SYS_TYPES_H ${HAVE_SYS_TYPES_H})
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if(NOT DEFINED HAVE_SYS_TYPES_H)
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check_include_files(sys/types.h GMIO_HAVE_SYS_TYPES_H)
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endif()
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set(GMIO_HAVE_SYS_STAT_H ${HAVE_SYS_STAT_H})
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if (NOT DEFINED HAVE_SYS_STAT_H)
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check_include_files(sys/stat.h GMIO_HAVE_SYS_STAT_H)
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endif()
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check_function_exists(fileno GMIO_HAVE_POSIX_FILENO_FUNC)
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# Have fstat64() ?
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check_c_source_compiles(
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"#include <sys/stat.h>
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int main() { fstat64(0, NULL); return 0; }"
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GMIO_HAVE_POSIX_FSTAT64_FUNC)
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if(WIN32)
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check_function_exists(_fstat64 GMIO_HAVE_WIN__FSTAT64_FUNC)
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endif()
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# Check size(in bytes) of stat::st_size
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set(CMAKE_EXTRA_INCLUDE_FILES sys/stat.h)
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if(GMIO_HAVE_WIN__FSTAT64_FUNC)
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check_type_size("((struct _stat64*)0)->st_size" GMIO_SIZEOF_STRUCT_STAT_ST_SIZE)
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elseif(GMIO_HAVE_POSIX_FSTAT64_FUNC)
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check_type_size("((struct stat64*)0)->st_size" GMIO_SIZEOF_STRUCT_STAT_ST_SIZE)
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else()
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else()
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check_type_size("((struct stat*)0)->st_size" GMIO_SIZEOF_STRUCT_STAT_ST_SIZE)
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add_definitions(-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE=1)
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list(APPEND CMAKE_REQUIRED_DEFINITIONS
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-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE=1)
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endif()
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endif()
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set(CMAKE_EXTRA_INCLUDE_FILES)
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endif()
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set(CMAKE_REQUIRED_DEFINITIONS)
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# Verify large file support
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set(GMIO_HAVE_SYS_TYPES_H ${HAVE_SYS_TYPES_H})
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if(GMIO_HAVE_SYS_STAT_H
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if(NOT DEFINED HAVE_SYS_TYPES_H)
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AND NOT(GMIO_SIZEOF_STRUCT_STAT_ST_SIZE STREQUAL "0") # Not arch-dependent size
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check_include_files(sys/types.h GMIO_HAVE_SYS_TYPES_H)
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AND NOT(GMIO_SIZEOF_STRUCT_STAT_ST_SIZE EQUAL 8))
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endif()
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message(WARNING "<sys/stat.h> does not provide 64b variant of fstat(), you may encounter problems with files > 2GB")
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endif()
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# Have builtin byte swap functions ?
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set(GMIO_HAVE_SYS_STAT_H ${HAVE_SYS_STAT_H})
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if(CMAKE_C_COMPILER_IS_GCC_COMPATIBLE)
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if (NOT DEFINED HAVE_SYS_STAT_H)
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# __builtin_bswap16() is missing in x86 GCC version prior to v4.7
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check_include_files(sys/stat.h GMIO_HAVE_SYS_STAT_H)
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# See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624
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endif()
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check_c_source_compiles(
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"int main() { return (int)__builtin_bswap16(0x1122); }"
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check_function_exists(fileno GMIO_HAVE_POSIX_FILENO_FUNC)
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GMIO_HAVE_GCC_BUILTIN_BSWAP16_FUNC)
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check_c_source_compiles(
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# Have fstat64() ?
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"int main() { return (int)__builtin_bswap32(0x11223344); }"
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check_c_source_compiles(
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GMIO_HAVE_GCC_BUILTIN_BSWAP32_FUNC)
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"#include <sys/stat.h>
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elseif(MSVC)
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int main() { fstat64(0, NULL); return 0; }"
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check_c_source_compiles(
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GMIO_HAVE_POSIX_FSTAT64_FUNC)
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"#include <stdlib.h>
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if(WIN32)
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int main() { return (int)_byteswap_ulong(0x11223344); }"
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check_function_exists(_fstat64 GMIO_HAVE_WIN__FSTAT64_FUNC)
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GMIO_HAVE_MSVC_BUILTIN_BSWAP_FUNC)
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endif()
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endif()
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endif() # !GMIO_BUILD_STRICT_C90
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# Check size(in bytes) of stat::st_size
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set(CMAKE_EXTRA_INCLUDE_FILES sys/stat.h)
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if(GMIO_HAVE_WIN__FSTAT64_FUNC)
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check_type_size("((struct _stat64*)0)->st_size" GMIO_SIZEOF_STRUCT_STAT_ST_SIZE)
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elseif(GMIO_HAVE_POSIX_FSTAT64_FUNC)
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check_type_size("((struct stat64*)0)->st_size" GMIO_SIZEOF_STRUCT_STAT_ST_SIZE)
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else()
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check_type_size("((struct stat*)0)->st_size" GMIO_SIZEOF_STRUCT_STAT_ST_SIZE)
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endif()
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set(CMAKE_EXTRA_INCLUDE_FILES)
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set(CMAKE_REQUIRED_DEFINITIONS)
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# Verify large file support ?
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if(GMIO_HAVE_SYS_STAT_H
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AND NOT(GMIO_SIZEOF_STRUCT_STAT_ST_SIZE STREQUAL "0") # Not arch-dependent size
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AND NOT(GMIO_SIZEOF_STRUCT_STAT_ST_SIZE EQUAL 8))
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message(WARNING "<sys/stat.h> does not provide 64b variant of fstat(), you may encounter problems with files > 2GB")
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endif()
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# Have compiler-intrisics bytes wap functions ?
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if(CMAKE_C_COMPILER_IS_GCC_COMPATIBLE)
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# __builtin_bswap16() is missing in x86 GCC version prior to v4.7
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# See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624
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check_c_source_compiles(
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"int main() { return (int)__builtin_bswap16(0x1122); }"
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GMIO_HAVE_GCC_BUILTIN_BSWAP16_FUNC)
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check_c_source_compiles(
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"int main() { return (int)__builtin_bswap32(0x11223344); }"
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GMIO_HAVE_GCC_BUILTIN_BSWAP32_FUNC)
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elseif(MSVC)
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check_c_source_compiles(
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"#include <stdlib.h>
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int main() { return (int)_byteswap_ulong(0x11223344); }"
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GMIO_HAVE_MSVC_BUILTIN_BSWAP_FUNC)
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endif()
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# Specific flags for GCC-like compilers
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# Specific flags for GCC-like compilers
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if(CMAKE_C_COMPILER_IS_GCC_COMPATIBLE)
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if(CMAKE_C_COMPILER_IS_GCC_COMPATIBLE)
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@ -283,5 +282,5 @@ endif()
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# Examples:
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# Examples:
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# cmake -DCMAKE_INSTALL_PREFIX=gcc-linux64 -DCMAKE_BUILD_TYPE=Debug -DCMAKE_DEBUG_POSTFIX=_d
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# cmake -DCMAKE_INSTALL_PREFIX=gcc-linux64 -DCMAKE_BUILD_TYPE=Debug -DCMAKE_DEBUG_POSTFIX=_d
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# cmake -DCMAKE_INSTALL_PREFIX=gcc-linux64 -DCMAKE_BUILD_TYPE=Release -DCMAKE_RELEASE_POSTFIX=_r
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# cmake -DCMAKE_INSTALL_PREFIX=gcc-linux64 -DCMAKE_BUILD_TYPE=Release -DCMAKE_RELEASE_POSTFIX=
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# make VERBOSE=1 or cmake -DCMAKE_VERBOSE_MAKEFILE=TRUE
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# make VERBOSE=1 or cmake -DCMAKE_VERBOSE_MAKEFILE=TRUE
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