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[trunk] activate LargeFileSupport in CMake

This commit is contained in:
Julien Malik 2011-11-28 15:32:22 +00:00
parent 27ba604ad7
commit 2eba4fb96b
7 changed files with 218 additions and 1 deletions
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10
CMake/TestFileOffsetBits.c Normal file
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@ -0,0 +1,10 @@
#include <sys/types.h>
int main(int argc, char **argv)
{
/* Cause a compile-time error if off_t is smaller than 64 bits */
#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
int off_t_is_large[ (LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? 1 : -1 ];
return 0;
}

24
CMake/TestLargeFiles.c.cmake.in Normal file
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@ -0,0 +1,24 @@
#cmakedefine _LARGEFILE_SOURCE
#cmakedefine _LARGEFILE64_SOURCE
#cmakedefine _LARGE_FILES
#cmakedefine _FILE_OFFSET_BITS
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
/* Cause a compile-time error if off_t is smaller than 64 bits,
* and make sure we have ftello / fseeko.
*/
#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
int off_t_is_large[ (LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? 1 : -1 ];
FILE *fp = fopen(argv[0],"r");
off_t offset = ftello( fp );
fseeko( fp, offset, SEEK_CUR );
fclose(fp);
return 0;
}

120
CMake/TestLargeFiles.cmake Normal file
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# - Define macro to check large file support
#
# OPJ_TEST_LARGE_FILES(VARIABLE)
#
# VARIABLE will be set to true if off_t is 64 bits, and fseeko/ftello present.
# This macro will also set defines necessary enable large file support, for instance
# _LARGE_FILES
# _LARGEFILE_SOURCE
# _FILE_OFFSET_BITS 64
# HAVE_FSEEKO
#
# However, it is YOUR job to make sure these defines are set in a CMakedefine so they
# end up in a config.h file that is included in your source if necessary!
MACRO(OPJ_TEST_LARGE_FILES VARIABLE)
IF(NOT DEFINED ${VARIABLE})
# On most platforms it is probably overkill to first test the flags for 64-bit off_t,
# and then separately fseeko. However, in the future we might have 128-bit filesystems
# (ZFS), so it might be dangerous to indiscriminately set e.g. _FILE_OFFSET_BITS=64.
MESSAGE(STATUS "Checking for 64-bit off_t")
# First check without any special flags
TRY_COMPILE(FILE64_OK "${PROJECT_BINARY_DIR}"
"${PROJECT_SOURCE_DIR}/CMake/TestFileOffsetBits.c")
if(FILE64_OK)
MESSAGE(STATUS "Checking for 64-bit off_t - present")
endif(FILE64_OK)
if(NOT FILE64_OK)
# Test with _FILE_OFFSET_BITS=64
TRY_COMPILE(FILE64_OK "${PROJECT_BINARY_DIR}"
"${PROJECT_SOURCE_DIR}/CMake/TestFileOffsetBits.c"
COMPILE_DEFINITIONS "-D_FILE_OFFSET_BITS=64" )
if(FILE64_OK)
MESSAGE(STATUS "Checking for 64-bit off_t - present with _FILE_OFFSET_BITS=64")
set(_FILE_OFFSET_BITS 64)
endif(FILE64_OK)
endif(NOT FILE64_OK)
if(NOT FILE64_OK)
# Test with _LARGE_FILES
TRY_COMPILE(FILE64_OK "${PROJECT_BINARY_DIR}"
"${PROJECT_SOURCE_DIR}/CMake/TestFileOffsetBits.c"
COMPILE_DEFINITIONS "-D_LARGE_FILES" )
if(FILE64_OK)
MESSAGE(STATUS "Checking for 64-bit off_t - present with _LARGE_FILES")
set(_LARGE_FILES 1)
endif(FILE64_OK)
endif(NOT FILE64_OK)
if(NOT FILE64_OK)
# Test with _LARGEFILE_SOURCE
TRY_COMPILE(FILE64_OK "${PROJECT_BINARY_DIR}"
"${PROJECT_SOURCE_DIR}/CMake/TestFileOffsetBits.c"
COMPILE_DEFINITIONS "-D_LARGEFILE_SOURCE" )
if(FILE64_OK)
MESSAGE(STATUS "Checking for 64-bit off_t - present with _LARGEFILE_SOURCE")
set(_LARGEFILE_SOURCE 1)
endif(FILE64_OK)
endif(NOT FILE64_OK)
if(NOT FILE64_OK)
# now check for Windows stuff
TRY_COMPILE(FILE64_OK "${PROJECT_BINARY_DIR}"
"${PROJECT_SOURCE_DIR}/CMake/TestWindowsFSeek.c")
if(FILE64_OK)
MESSAGE(STATUS "Checking for 64-bit off_t - present with _fseeki64")
set(HAVE__FSEEKI64 1)
endif(FILE64_OK)
endif(NOT FILE64_OK)
if(NOT FILE64_OK)
MESSAGE(STATUS "Checking for 64-bit off_t - not present")
else(NOT FILE64_OK)
# Set the flags we might have determined to be required above
configure_file("${PROJECT_SOURCE_DIR}/CMake/TestLargeFiles.c.cmake.in"
"${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestLargeFiles.c")
MESSAGE(STATUS "Checking for fseeko/ftello")
# Test if ftello/fseeko are available
TRY_COMPILE(FSEEKO_COMPILE_OK "${PROJECT_BINARY_DIR}"
"${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestLargeFiles.c")
if(FSEEKO_COMPILE_OK)
MESSAGE(STATUS "Checking for fseeko/ftello - present")
endif(FSEEKO_COMPILE_OK)
if(NOT FSEEKO_COMPILE_OK)
# glibc 2.2 neds _LARGEFILE_SOURCE for fseeko (but not 64-bit off_t...)
TRY_COMPILE(FSEEKO_COMPILE_OK "${PROJECT_BINARY_DIR}"
"${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestLargeFiles.c"
COMPILE_DEFINITIONS "-D_LARGEFILE_SOURCE" )
if(FSEEKO_COMPILE_OK)
MESSAGE(STATUS "Checking for fseeko/ftello - present with _LARGEFILE_SOURCE")
set(_LARGEFILE_SOURCE 1)
endif(FSEEKO_COMPILE_OK)
endif(NOT FSEEKO_COMPILE_OK)
endif(NOT FILE64_OK)
if(FSEEKO_COMPILE_OK)
SET(${VARIABLE} 1 CACHE INTERNAL "Result of test for large file support" FORCE)
set(HAVE_FSEEKO 1)
else(FSEEKO_COMPILE_OK)
if (HAVE__FSEEKI64)
SET(${VARIABLE} 1 CACHE INTERNAL "Result of test for large file support" FORCE)
SET(HAVE__FSEEKI64 1 CACHE INTERNAL "Windows 64-bit fseek" FORCE)
else (HAVE__FSEEKI64)
MESSAGE(STATUS "Checking for fseeko/ftello - not found")
SET(${VARIABLE} 0 CACHE INTERNAL "Result of test for large file support" FORCE)
endif (HAVE__FSEEKI64)
endif(FSEEKO_COMPILE_OK)
ENDIF(NOT DEFINED ${VARIABLE})
ENDMACRO(OPJ_TEST_LARGE_FILES VARIABLE)

11
CMake/TestWindowsFSeek.c Normal file
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#include <stdio.h>
int main()
{
__int64 off=0;
_fseeki64(NULL, off, SEEK_SET);
return 0;
}

4
CMakeLists.txt
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@ -168,6 +168,10 @@ CHECK_INCLUDE_FILE("sys/stat.h" HAVE_SYS_STAT_H)
CHECK_INCLUDE_FILE("sys/types.h" HAVE_SYS_TYPES_H)
CHECK_INCLUDE_FILE("unistd.h" HAVE_UNISTD_H)
# Enable Large file support
INCLUDE(TestLargeFiles)
OPJ_TEST_LARGE_FILES(OPJ_HAVE_LARGEFILES)
#-----------------------------------------------------------------------------
# Build Library
INCLUDE_DIRECTORIES(BEFORE ${OPENJPEG_BINARY_DIR})

40
libopenjpeg/opj_includes.h
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@ -26,6 +26,12 @@
#ifndef OPJ_INCLUDES_H
#define OPJ_INCLUDES_H
/*
* This must be included before any system headers,
* since they can react to macro defined there
*/
#include "opj_config.h"
/*
==========================================================
Standard includes used by the library
@ -42,6 +48,40 @@
#include <ctype.h>
#include <assert.h>
/*
Use fseeko() and ftello() if they are available since they use
'off_t' rather than 'long'. It is wrong to use fseeko() and
ftello() only on systems with special LFS support since some systems
(e.g. FreeBSD) support a 64-bit off_t by default.
*/
#if defined(HAVE_FSEEKO)
# define fseek fseeko
# define ftell ftello
#endif
#if defined(MSWINDOWS) && !defined(Windows95) && !defined(__BORLANDC__) && \
!(defined(_MSC_VER) && _MSC_VER < 1400) && \
!(defined(__MINGW32__) && __MSVCRT_VERSION__ < 0x800)
/*
Windows '95 and Borland C do not support _lseeki64
Visual Studio does not support _fseeki64 and _ftelli64 until the 2005 release.
Without these interfaces, files over 2GB in size are not supported for Windows.
*/
# define OPJ_FSEEK(stream,offset,whence) _fseeki64(stream,/* __int64 */ offset,whence)
# define OPJ_FSTAT(fildes,stat_buff) _fstati64(fildes,/* struct _stati64 */ stat_buff)
# define OPJ_FTELL(stream) /* __int64 */ _ftelli64(stream)
# define OPJ_STAT_STRUCT_T struct _stati64
# define OPJ_STAT(path,stat_buff) _stati64(path,/* struct _stati64 */ stat_buff)
#else
# define OPJ_FSEEK(stream,offset,whence) fseek(stream,offset,whence)
# define OPJ_FSTAT(fildes,stat_buff) fstat(fildes,stat_buff)
# define OPJ_FTELL(stream) ftell(stream)
# define OPJ_STAT_STRUCT_T struct stat
# define OPJ_STAT(path,stat_buff) stat(path,stat_buff)
#endif
/*
==========================================================
OpenJPEG interface

8
opj_config.h.cmake.in
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@ -15,6 +15,14 @@
#cmakedefine HAVE_LIBTIFF
#cmakedefine HAVE_TIFF_H
#cmakedefine _LARGEFILE_SOURCE
#cmakedefine _LARGEFILE64_SOURCE
#cmakedefine _LARGE_FILES
#cmakedefine _FILE_OFFSET_BITS
#cmakedefine HAVE_FSEEKO
#cmakedefine HAVE__FSEEKI64
#cmakedefine HAVE_LIBLCMS1
#cmakedefine HAVE_LIBLCMS2
#cmakedefine HAVE_LCMS1_H