Re: _XOPEN_SOURCE=500 breaks at least OSF1 V5.0 [Re: largefiles

[Akim Demaille]

>>>>> "Paul" == Paul Eggert <address@hidden> writes:

Paul> Then my diagnosis was incorrect.  Sorry about that.

No problem!

Paul> I looked into it some more and I think I now see the problem.

Thanks!  Below is the patch I applied to CVS Autoconf, since our
sources are somewhat diverging.  But first, the new results on the
same machine (victory :).

/tmp % cat configure.in                                     
AC_INIT
AC_FUNC_FSEEKO
/tmp % ace                                                  
/tmp % ./configure                                          
checking for gcc... gcc
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking whether we are using the GNU C compiler... yes
checking for object suffix... o
checking for executable suffix... 
checking whether gcc accepts -g... yes
checking for _LARGEFILE_SOURCE value needed for large files... 1
checking for fseeko... yes
/tmp % cat config.log                                            
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by  2.49b, executed with
 > ./configure 

on nostromo:

uname -m = i686
uname -r = 2.2.17
uname -s = Linux
uname -v = #1 Sat Sep 9 12:42:22 EST 2000

/usr/bin/uname -p = 
/bin/uname -X     = 

hostinfo               = 
/bin/universe          = 
/usr/bin/arch -k       = 
/bin/arch              = i686
/usr/bin/oslevel       = 
/usr/convex/getsysinfo = 
configure:863: checking for gcc
configure:885: result: gcc
configure:1106: checking whether the C compiler works
configure:1121: gcc -o conftest    conftest.c  >&5
configure:1125: ./conftest
configure:1137: result: yes
configure:1148: checking whether we are cross compiling
configure:1150: result: no
configure:1153: checking whether we are using the GNU C compiler
configure:1174: gcc -c   conftest.c >&5
configure:1185: result: yes
configure:1188: checking for object suffix
configure:1205: gcc -c   conftest.c >&5
configure:1218: result: o
configure:1224: checking for executable suffix
configure:1245: gcc -o conftest    conftest.c  >&5
configure:1264: result: 
configure:1273: checking whether gcc accepts -g
configure:1291: gcc -c -g  conftest.c >&5
configure:1300: result: yes
configure:1323: checking for _LARGEFILE_SOURCE value needed for large files
configure:1343: gcc -c -g -O2  conftest.c >&5
configure: In function `main':
configure:1336: `fseeko' undeclared (first use in this function)
configure:1336: (Each undeclared identifier is reported only once
configure:1336: for each function it appears in.)
configure: failed program was:
#line 1331 "configure"
#include "confdefs.h"
#include <stdio.h>
int
main ()
{
return !fseeko;
  ;
  return 0;
}
configure:1364: gcc -c -g -O2  conftest.c >&5
configure:1374: result: 1
configure:1388: checking for fseeko
configure:1406: gcc -o conftest -g -O2   conftest.c  >&5
configure:1415: result: yes
configure: exit 0

----------------------------------------------------------------------

Index: acfunctions.m4
===================================================================
RCS file: /cvs/autoconf/acfunctions.m4,v
retrieving revision 1.19
diff -u -u -r1.19 acfunctions.m4
--- acfunctions.m4 2000/11/14 16:01:05 1.19
+++ acfunctions.m4 2000/11/16 08:45:58
@@ -379,7 +379,7 @@
 AC_DEFUN([AC_FUNC_FSEEKO],
 [_AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE, 1,
    [ac_cv_sys_largefile_source],
-   [Define to make fseeko visible on some hosts (e.g. HP-UX 10.20).],
+   [Define to make fseeko visible on some hosts (e.g. glibc 2.2).],
    address@hidden:@include <stdio.h>], [return !fseeko;])
 
 # We used to try defining _XOPEN_SOURCE=500 too, to work around a bug
Index: acspecific.m4
===================================================================
RCS file: /cvs/autoconf/acspecific.m4,v
retrieving revision 1.313
diff -u -u -r1.313 acspecific.m4
--- acspecific.m4 2000/11/14 16:01:05 1.313
+++ acspecific.m4 2000/11/16 08:45:59
@@ -623,14 +623,12 @@
 with arguments. Remove this warning when you adjust your code.])])
 
 
-# _AC_SYS_LARGEFILE_SOURCE(PROLOGUE, BODY)
-# ----------------------------------------
-m4_define([_AC_SYS_LARGEFILE_SOURCE],
-[AC_LANG_PROGRAM(
-[$1
address@hidden:@include <sys/types.h>
-int a[[(off_t) 9223372036854775807 == 9223372036854775807 ? 1 : -1]];],
-[$2])])
+# _AC_SYS_LARGEFILE_TEST_INCLUDES
+# -------------------------------
+m4_define([_AC_SYS_LARGEFILE_TEST_INCLUDES],
address@hidden:@include <sys/types.h>
+int a[[(off_t) 9223372036854775807 == 9223372036854775807 ? 1 : -1]];[]dnl
+])
 
 
 # _AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE,
@@ -642,9 +640,9 @@
 [AC_CACHE_CHECK([for $1 value needed for large files], [$3],
 [while :; do
   $3=no
-  AC_COMPILE_IFELSE([_AC_SYS_LARGEFILE_SOURCE([$5], [$6])],
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$5], [$6])],
                    [break])
-  AC_COMPILE_IFELSE([_AC_SYS_LARGEFILE_SOURCE(address@hidden:@define $1 $2
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM(address@hidden:@define $1 $2
 $5], [$6])],
                    [$3=$2; break])
   break
@@ -690,10 +688,12 @@
 
   _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.])
+    [Number of bits in a file offset, on hosts where this is settable.],
+    [_AC_SYS_LARGEFILE_TEST_INCLUDES])
   _AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1,
     ac_cv_sys_large_files,
-    [Define for large files, on AIX-style hosts.])
+    [Define for large files, on AIX-style hosts.],
+    [_AC_SYS_LARGEFILE_TEST_INCLUDES])
 fi
 ])# AC_SYS_LARGEFILE