+2000-06-08 Paul Eggert <eggert@twinsun.com>
+
+ Import AC_SYS_LARGEFILE from largefile.m4 serial 12.
+
+ * acspecific.m4 (AC_SYS_LARGEFILE, _AC_SYS_LARGEFILE_MACRO_VALUE,
+ _AC_SYS_LARGEFILE_SOURCE): New.
+ * doc/autoconf.texi (System Services): Document AC_SYS_LARGEFILE.
+
2000-06-08 Steven G. Johnson <stevenj@alum.mit.edu>
* aclang.m4 (AC_F77_LIBRARY_LDFLAGS): Don't override FLIBS if
- AC_CHECK_DECL, AC_CHECK_DECLS
To check whether a symbol is declared.
+- AC_CHECK_SIZEOF
+ No longer needs a cross-compilation size.
+
- AC_CHECK_TYPE
The test it performs is much more robust than previously, and makes
it possible to test builtin types in addition to typedefs.
Check for given members in aggregates (e.g., pw_gecos in struct
passwd).
-
- AC_PROG_CC_STDC
Checks if the compiler supports ISO C, included when needs special
options.
- AC_PROG_LEX
Now integrates `AC_DECL_YYTEXT' which is obsoleted.
-- AC_CHECK_SIZEOF
- No longer needs a cross-compilation size.
+- AC_SYS_LARGEFILE
+ Arrange for large-file support.
** C++ compatibility
Every macro has been revisited in order to support at best CC=c++.
interpval=$ac_cv_sys_interpreter
])
+
AC_DEFUNCT([AC_HAVE_POUNDBANG], [;use AC_SYS_INTERPRETER, taking no arguments])
AC_DEFUNCT([AC_ARG_ARRAY], [; don't do unportable things with arguments])
+# _AC_SYS_LARGEFILE_SOURCE(PROLOGUE, BODY)
+# ----------------------------------------
+define([_AC_SYS_LARGEFILE_SOURCE],
+[AC_LANG_PROGRAM(
+[$1
+@%:@include <sys/types.h>
+int a[[(off_t) 9223372036854775807 == 9223372036854775807 ? 1 : -1]];],
+[$2])])
+
+
+# _AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE,
+# CACHE-VAR,
+# DESCRIPTION,
+# [INCLUDES], [FUNCTION-BODY])
+# ----------------------------------------------------------
+define([_AC_SYS_LARGEFILE_MACRO_VALUE],
+[AC_CACHE_CHECK([for $1 value needed for large files], [$3],
+[while :; do
+ AC_COMPILE_IFELSE([_AC_SYS_LARGEFILE_SOURCE([$5], [$6])],
+ [break])
+ AC_COMPILE_IFELSE([_AC_SYS_LARGEFILE_SOURCE([@%:@define $1 $2
+$5], [$6])],
+ [$3=$2; break])
+ $3=no
+ break
+done])
+if test "$$3" != no; then
+ AC_DEFINE_UNQUOTED([$1], [$$3], [$4])
+fi[]dnl
+])# _AC_SYS_LARGEFILE_MACRO_VALUE
+
+
+# AC_SYS_LARGEFILE
+# ----------------
+# By default, many hosts won't let programs access large files;
+# one must use special compiler options to get large-file access to work.
+# For more details about this brain damage please see:
+# http://www.sas.com/standards/large.file/x_open.20Mar96.html
+AC_DEFUN([AC_SYS_LARGEFILE],
+[AC_ARG_ENABLE(largefile,
+ [ --disable-largefile omit support for large files])
+if test "$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-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_COMPILE_IFELSE([_AC_SYS_LARGEFILE_SOURCE()],
+ [break])
+ CC="$CC -n32"
+ AC_COMPILE_IFELSE([_AC_SYS_LARGEFILE_SOURCE()],
+ [ac_cv_sys_largefile_CC=' -n32'; break])
+ break
+ done
+ CC=$ac_save_CC
+ fi])
+ if test "$ac_cv_sys_largefile_CC" != no; then
+ CC=$CC$ac_cv_sys_largefile_CC
+ fi
+
+ _AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64,
+ ac_cv_sys_file_offset_bits,
+ [Number of bits in a file offset, on hosts where this is settable.])
+ _AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE, 1,
+ ac_cv_sys_largefile_source,
+ [Define to make ftello visible on some hosts (e.g. HP-UX 10.20).],
+ [@%:@include <stdio.h>], [return !ftello;])
+ _AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1,
+ ac_cv_sys_large_files,
+ [Define for large files, on AIX-style hosts.])
+ _AC_SYS_LARGEFILE_MACRO_VALUE(_XOPEN_SOURCE, 500,
+ ac_cv_sys_xopen_source,
+ [Define to make ftello visible on some hosts (e.g. glibc 2.1.3).],
+ [@%:@include <stdio.h>], [return !ftello;])
+fi
+])# AC_SYS_LARGEFILE
+
+
# AC_SYS_LONG_FILE_NAMES
# ----------------------
# Security: use a temporary directory as the most portable way of
if the system supports @samp{#!}, @samp{no} if not.
@end defmac
+@defmac AC_SYS_LARGEFILE
+@maindex SYS_LARGEFILE
+@cvindex _FILE_OFFSET_BITS
+@cvindex _LARGEFILE_SOURCE
+@cvindex _LARGE_FILES
+@cvindex _XOPEN_SOURCE
+@ovindex CC
+Arrange for
+@uref{http://www.sas.com/standards/large.file/x_open.20Mar96.html,
+large-file support}. On some hosts, one must use special compiler
+options to build programs that can access large files. Append any such
+options to the output variable @code{CC}. Define
+@code{_FILE_OFFSET_BITS}, @code{_LARGEFILE_SOURCE}, @code{_LARGE_FILES},
+and @code{_XOPEN_SOURCE} if necessary.
+
+The user can disable large-file support by configuring with the
+@option{--disable-largefile} option.
+
+If you use this macro, check that your program works even when
+@code{off_t} is longer than @code{long}, since this is common when
+large-file support is enabled. For example, it is not correct to print
+an arbitrary @code{off_t} value @code{X} with @code{printf ("%ld",
+(long) X)}.
+@end defmac
+
@defmac AC_SYS_LONG_FILE_NAMES
@maindex SYS_LONG_FILE_NAMES
@cvindex HAVE_LONG_FILE_NAMES
interpval=$ac_cv_sys_interpreter
])
+
AC_DEFUNCT([AC_HAVE_POUNDBANG], [;use AC_SYS_INTERPRETER, taking no arguments])
AC_DEFUNCT([AC_ARG_ARRAY], [; don't do unportable things with arguments])
+# _AC_SYS_LARGEFILE_SOURCE(PROLOGUE, BODY)
+# ----------------------------------------
+define([_AC_SYS_LARGEFILE_SOURCE],
+[AC_LANG_PROGRAM(
+[$1
+@%:@include <sys/types.h>
+int a[[(off_t) 9223372036854775807 == 9223372036854775807 ? 1 : -1]];],
+[$2])])
+
+
+# _AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE,
+# CACHE-VAR,
+# DESCRIPTION,
+# [INCLUDES], [FUNCTION-BODY])
+# ----------------------------------------------------------
+define([_AC_SYS_LARGEFILE_MACRO_VALUE],
+[AC_CACHE_CHECK([for $1 value needed for large files], [$3],
+[while :; do
+ AC_COMPILE_IFELSE([_AC_SYS_LARGEFILE_SOURCE([$5], [$6])],
+ [break])
+ AC_COMPILE_IFELSE([_AC_SYS_LARGEFILE_SOURCE([@%:@define $1 $2
+$5], [$6])],
+ [$3=$2; break])
+ $3=no
+ break
+done])
+if test "$$3" != no; then
+ AC_DEFINE_UNQUOTED([$1], [$$3], [$4])
+fi[]dnl
+])# _AC_SYS_LARGEFILE_MACRO_VALUE
+
+
+# AC_SYS_LARGEFILE
+# ----------------
+# By default, many hosts won't let programs access large files;
+# one must use special compiler options to get large-file access to work.
+# For more details about this brain damage please see:
+# http://www.sas.com/standards/large.file/x_open.20Mar96.html
+AC_DEFUN([AC_SYS_LARGEFILE],
+[AC_ARG_ENABLE(largefile,
+ [ --disable-largefile omit support for large files])
+if test "$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-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_COMPILE_IFELSE([_AC_SYS_LARGEFILE_SOURCE()],
+ [break])
+ CC="$CC -n32"
+ AC_COMPILE_IFELSE([_AC_SYS_LARGEFILE_SOURCE()],
+ [ac_cv_sys_largefile_CC=' -n32'; break])
+ break
+ done
+ CC=$ac_save_CC
+ 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_MACRO_VALUE(_LARGEFILE_SOURCE, 1,
+ ac_cv_sys_largefile_source,
+ [Define to make ftello visible on some hosts (e.g. HP-UX 10.20).],
+ [@%:@include <stdio.h>], [return !ftello;])
+ _AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1,
+ ac_cv_sys_large_files,
+ [Define for large files, on AIX-style hosts.])
+ _AC_SYS_LARGEFILE_MACRO_VALUE(_XOPEN_SOURCE, 500,
+ ac_cv_sys_xopen_source,
+ [Define to make ftello visible on some hosts (e.g. glibc 2.1.3).],
+ [@%:@include <stdio.h>], [return !ftello;])
+fi
+])# AC_SYS_LARGEFILE
+
+
# AC_SYS_LONG_FILE_NAMES
# ----------------------
# Security: use a temporary directory as the most portable way of
projects / thirdparty / autoconf.git / commitdiff
