- for ac_flag in $ac_cv_sys_largefile_CFLAGS no; do
- case "$ac_flag" in
- no) ;;
- -D_FILE_OFFSET_BITS=*) ;;
- -D_LARGEFILE_SOURCE | -D_LARGEFILE_SOURCE=*) ;;
- -D_LARGE_FILES | -D_LARGE_FILES=*) ;;
- -D?* | -I?*)
- AC_SYS_LARGEFILE_SPACE_APPEND(CPPFLAGS, "$ac_flag") ;;
- *)
- AC_SYS_LARGEFILE_SPACE_APPEND(CFLAGS, "$ac_flag") ;;
- esac
- done
- AC_SYS_LARGEFILE_SPACE_APPEND(LDFLAGS, "$ac_cv_sys_largefile_LDFLAGS")
- AC_SYS_LARGEFILE_SPACE_APPEND(LIBS, "$ac_cv_sys_largefile_LIBS")
- AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS,
- ac_cv_sys_file_offset_bits,
- [Number of bits in a file offset, on hosts where this is settable.],
- [case "$host_os" in
- # HP-UX 10.20 and later
- hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)
- ac_cv_sys_file_offset_bits=64 ;;
- esac])
- AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE,
- ac_cv_sys_largefile_source,
- [Define to make fseeko etc. visible, on some hosts.],
- [case "$host_os" in
- # HP-UX 10.20 and later
- hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)
- ac_cv_sys_largefile_source=1 ;;
- esac])
- AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES,
- ac_cv_sys_large_files,
- [Define for large files, on AIX-style hosts.],
- [case "$host_os" in
- # AIX 4.2 and later
- aix4.[2-9]* | aix4.1[0-9]* | aix[5-9].* | aix[1-9][0-9]*)
- ac_cv_sys_large_files=1 ;;
- esac])
- fi
- ])
+# AC_SYS_LARGEFILE
+# ----------------
+# By default, many hosts won't let programs access large files;
+# one must use special compiler options to get large-file access to work.
+# For more details about this brain damage please see:
+# http://www.unix-systems.org/version2/whatsnew/lfs20mar.html
+AC_DEFUN([AC_SYS_LARGEFILE],
+[AC_ARG_ENABLE(largefile,
+ [ --disable-largefile omit support for large files])
+if test "$enable_largefile" != no; then
+
+ AC_CACHE_CHECK([for special C compiler options needed for large files],
+ ac_cv_sys_largefile_CC,
+ [ac_cv_sys_largefile_CC=no
+ if test "$GCC" != yes; then
+ ac_save_CC=$CC
+ while :; do
+ # IRIX 6.2 and later do not support large files by default,
+ # so use the C compiler's -n32 option if that helps.
+ AC_LANG_CONFTEST([AC_LANG_PROGRAM([_AC_SYS_LARGEFILE_TEST_INCLUDES])])
+ AC_COMPILE_IFELSE([], [break])
+ CC="$CC -n32"
+ AC_COMPILE_IFELSE([], [ac_cv_sys_largefile_CC=' -n32'; break])
+ break
+ done
+ CC=$ac_save_CC
+ rm -f conftest.$ac_ext
+ fi])
+ if test "$ac_cv_sys_largefile_CC" != no; then
+ CC=$CC$ac_cv_sys_largefile_CC
+ fi
+
+ _AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64,
+ ac_cv_sys_file_offset_bits,
+ [Number of bits in a file offset, on hosts where this is settable.],
+ [_AC_SYS_LARGEFILE_TEST_INCLUDES])
+ if test $ac_cv_sys_file_offset_bits = unknown; then
+ _AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1,
+ ac_cv_sys_large_files,
+ [Define for large files, on AIX-style hosts.],
+ [_AC_SYS_LARGEFILE_TEST_INCLUDES])
+ fi
+
+ AC_DEFINE([_DARWIN_USE_64_BIT_INODE], [1],
+ [Enable large inode numbers on Mac OS X 10.5.])
+fi
+])# AC_SYS_LARGEFILE
+])# m4_version_prereq 2.70
+
+# Enable large files on systems where this is implemented by Gnulib, not by the
+# system headers.
+# Set the variables WINDOWS_64_BIT_OFF_T, WINDOWS_64_BIT_ST_SIZE if Gnulib
+# overrides ensure that off_t or 'struct size.st_size' are 64-bit, respectively.
+AC_DEFUN([gl_LARGEFILE],
+[
+ AC_REQUIRE([AC_CANONICAL_HOST])
+ case "$host_os" in
+ mingw*)
+ dnl Native Windows.
+ dnl mingw64 defines off_t to a 64-bit type already, if
+ dnl _FILE_OFFSET_BITS=64, which is ensured by AC_SYS_LARGEFILE.
+ AC_CACHE_CHECK([for 64-bit off_t], [gl_cv_type_off_t_64],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <sys/types.h>
+ int verify_off_t_size[sizeof (off_t) >= 8 ? 1 : -1];
+ ]],
+ [[]])],
+ [gl_cv_type_off_t_64=yes], [gl_cv_type_off_t_64=no])
+ ])
+ if test $gl_cv_type_off_t_64 = no; then
+ WINDOWS_64_BIT_OFF_T=1
+ else
+ WINDOWS_64_BIT_OFF_T=0
+ fi
+ dnl But all native Windows platforms (including mingw64) have a 32-bit
+ dnl st_size member in 'struct stat'.
+ WINDOWS_64_BIT_ST_SIZE=1
+ ;;
+ *)
+ dnl Nothing to do on gnulib's side.
+ dnl A 64-bit off_t is
+ dnl - already the default on Mac OS X, FreeBSD, NetBSD, OpenBSD, IRIX,
+ dnl OSF/1, Cygwin,
+ dnl - enabled by _FILE_OFFSET_BITS=64 (ensured by AC_SYS_LARGEFILE) on
+ dnl glibc, HP-UX, Solaris,
+ dnl - enabled by _LARGE_FILES=1 (ensured by AC_SYS_LARGEFILE) on AIX,
+ dnl - impossible to achieve on Minix 3.1.8.
+ WINDOWS_64_BIT_OFF_T=0
+ WINDOWS_64_BIT_ST_SIZE=0
+ ;;
+ esac
+])