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cmake: set _FILE_OFFSET_BITS=64 if required for platform

This commit is contained in:
Marvin W 2017-08-31 23:53:40 +02:00
parent 2cd6e94cc5
commit dc26841b9e
No known key found for this signature in database
GPG Key ID: 072E9235DB996F2A
2 changed files with 31 additions and 2 deletions
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22
CMakeLists.txt
View File

@ -44,10 +44,11 @@ set(TARGET_INSTALL LIBRARY DESTINATION ${LIB_INSTALL_DIR} RUNTIME DESTINATION ${
set(PLUGIN_INSTALL LIBRARY DESTINATION ${PLUGIN_INSTALL_DIR} RUNTIME DESTINATION ${PLUGIN_INSTALL_DIR})
include(CheckCCompilerFlag)
include(CheckCSourceCompiles)
macro(AddCFlagIfSupported flag)
string(REGEX REPLACE "[^a-z^A-Z^_^0-9]+" "_" flag_name ${flag})
CHECK_C_COMPILER_FLAG(${flag} COMPILER_SUPPORTS${flag_name})
check_c_compiler_flag(${flag} COMPILER_SUPPORTS${flag_name})
if(${COMPILER_SUPPORTS${flag_name}})
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}")
endif()
@ -55,7 +56,7 @@ endmacro()
macro(AddValaCFlagIfSupported flag)
string(REGEX REPLACE "[^a-z^A-Z^_^0-9]+" "_" flag_name ${flag})
CHECK_C_COMPILER_FLAG(${flag} COMPILER_SUPPORTS${flag_name})
check_c_compiler_flag(${flag} COMPILER_SUPPORTS${flag_name})
if(${COMPILER_SUPPORTS${flag_name}})
set(VALA_CFLAGS "${VALA_CFLAGS} ${flag}")
endif()
@ -78,6 +79,21 @@ AddValaCFlagIfSupported(-Wno-unused-variable)
AddValaCFlagIfSupported(-Wno-unused-function)
AddValaCFlagIfSupported(-Wno-unused-label)
try_compile(__WITHOUT_FILE_OFFSET_BITS_64 ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_SOURCE_DIR}/cmake/LargeFileOffsets.c COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS})
if(NOT __WITHOUT_FILE_OFFSET_BITS_64)
try_compile(__WITH_FILE_OFFSET_BITS_64 ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_SOURCE_DIR}/cmake/LargeFileOffsets.c COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} -D_FILE_OFFSET_BITS=64)
if(__WITH_FILE_OFFSET_BITS_64)
AddCFlagIfSupported(-D_FILE_OFFSET_BITS=64)
AddValaCFlagIfSupported(-D_FILE_OFFSET_BITS=64)
message(STATUS "Enabled large file support using _FILE_OFFSET_BITS=64")
else(__WITH_FILE_OFFSET_BITS_64)
message(STATUS "Large file support not available")
endif(__WITH_FILE_OFFSET_BITS_64)
unset(__WITH_FILE_OFFSET_BITS_64)
endif(NOT __WITHOUT_FILE_OFFSET_BITS_64)
unset(__WITHOUT_FILE_OFFSET_BITS_64)
if($ENV{USE_CCACHE})
# Configure CCache if available
find_program(CCACHE_FOUND ccache)
@ -85,6 +101,8 @@ if($ENV{USE_CCACHE})
message(STATUS "Using ccache")
set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
else(CCACHE_FOUND)
message(STATUS "USE_CCACHE was set but ccache was not found")
endif(CCACHE_FOUND)
endif($ENV{USE_CCACHE})

11
cmake/LargeFileOffsets.c Normal file
View File

@ -0,0 +1,11 @@
#include <sys/types.h>
#define _K ((off_t)1024)
#define _M ((off_t)1024 * _K)
#define _G ((off_t)1024 * _M)
#define _T ((off_t)1024 * _G)
int test[(((64 * _G -1) % 671088649) == 268434537) && (((_T - (64 * _G -1) + 255) % 1792151290) == 305159546)? 1: -1];
int main() {
return 0;
}