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Automatically check for the fdatasync() function and replace it with fsync()

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if not found. (CVS 2739)

FossilOrigin-Name: 385a08afefaf552db221ae8bd30ecc7e7c07ee5b
This commit is contained in:
drh
2005-10-04 18:38:49 +00:00
parent 762e584e2c
commit af6edf5534
4 changed files with 122 additions and 10 deletions
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107
configure vendored
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@@ -1496,7 +1496,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
# The following RCS revision string applies to configure.in
# $Revision: 1.31 $
# $Revision: 1.32 $
#########
# Programs needed
@@ -20340,6 +20340,111 @@ if test $ac_cv_func_usleep = yes; then
fi
#--------------------------------------------------------------------
# Redefine fdatasync as fsync on systems that lack fdatasync
#--------------------------------------------------------------------
echo "$as_me:$LINENO: checking for fdatasync" >&5
echo $ECHO_N "checking for fdatasync... $ECHO_C" >&6
if test "${ac_cv_func_fdatasync+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
/* Define fdatasync to an innocuous variant, in case <limits.h> declares fdatasync.
For example, HP-UX 11i <limits.h> declares gettimeofday. */
#define fdatasync innocuous_fdatasync
/* System header to define __stub macros and hopefully few prototypes,
which can conflict with char fdatasync (); below.
Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
<limits.h> exists even on freestanding compilers. */
#ifdef __STDC__
# include <limits.h>
#else
# include <assert.h>
#endif
#undef fdatasync
/* Override any gcc2 internal prototype to avoid an error. */
#ifdef __cplusplus
extern "C"
{
#endif
/* We use char because int might match the return type of a gcc2
builtin and then its argument prototype would still apply. */
char fdatasync ();
/* The GNU C library defines this for functions which it implements
to always fail with ENOSYS. Some functions are actually named
something starting with __ and the normal name is an alias. */
#if defined (__stub_fdatasync) || defined (__stub___fdatasync)
choke me
#else
char (*f) () = fdatasync;
#endif
#ifdef __cplusplus
}
#endif
int
main ()
{
return f != fdatasync;
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
(eval $ac_link) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest$ac_exeext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
ac_cv_func_fdatasync=yes
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
ac_cv_func_fdatasync=no
fi
rm -f conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
fi
echo "$as_me:$LINENO: result: $ac_cv_func_fdatasync" >&5
echo "${ECHO_T}$ac_cv_func_fdatasync" >&6
if test $ac_cv_func_fdatasync = yes; then
:
else
cat >>confdefs.h <<\_ACEOF
#define fdatasync fsync
_ACEOF
fi
#########
# Generate the output files.
#