mirror of
https://github.com/postgres/postgres.git
synced 2025-07-27 12:41:57 +03:00
Support varlena fields with single-byte headers and unaligned storage.
This commit breaks any code that assumes that the mere act of forming a tuple (without writing it to disk) does not "toast" any fields. While all available regression tests pass, I'm not totally sure that we've fixed every nook and cranny, especially in contrib. Greg Stark with some help from Tom Lane
This commit is contained in:
Tom Lane
232
configure
vendored
232
configure
vendored
@ -11143,7 +11143,237 @@ fi
|
||||
## Types, structures, compiler characteristics
|
||||
##
|
||||
|
||||
echo "$as_me:$LINENO: checking for an ANSI C-conforming const" >&5
|
||||
echo "$as_me:$LINENO: checking whether byte ordering is bigendian" >&5
|
||||
echo $ECHO_N "checking whether byte ordering is bigendian... $ECHO_C" >&6
|
||||
if test "${ac_cv_c_bigendian+set}" = set; then
|
||||
echo $ECHO_N "(cached) $ECHO_C" >&6
|
||||
else
|
||||
# See if sys/param.h defines the BYTE_ORDER macro.
|
||||
cat >conftest.$ac_ext <<_ACEOF
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
#include <sys/types.h>
|
||||
#include <sys/param.h>
|
||||
|
||||
int
|
||||
main ()
|
||||
{
|
||||
#if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
|
||||
bogus endian macros
|
||||
#endif
|
||||
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
rm -f conftest.$ac_objext
|
||||
if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
|
||||
(eval $ac_compile) 2>conftest.er1
|
||||
ac_status=$?
|
||||
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_objext'
|
||||
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
|
||||
(eval $ac_try) 2>&5
|
||||
ac_status=$?
|
||||
echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); }; }; then
|
||||
# It does; now see whether it defined to BIG_ENDIAN or not.
|
||||
cat >conftest.$ac_ext <<_ACEOF
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
#include <sys/types.h>
|
||||
#include <sys/param.h>
|
||||
|
||||
int
|
||||
main ()
|
||||
{
|
||||
#if BYTE_ORDER != BIG_ENDIAN
|
||||
not big endian
|
||||
#endif
|
||||
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
rm -f conftest.$ac_objext
|
||||
if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
|
||||
(eval $ac_compile) 2>conftest.er1
|
||||
ac_status=$?
|
||||
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_objext'
|
||||
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
|
||||
(eval $ac_try) 2>&5
|
||||
ac_status=$?
|
||||
echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); }; }; then
|
||||
ac_cv_c_bigendian=yes
|
||||
else
|
||||
echo "$as_me: failed program was:" >&5
|
||||
sed 's/^/| /' conftest.$ac_ext >&5
|
||||
|
||||
ac_cv_c_bigendian=no
|
||||
fi
|
||||
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
|
||||
else
|
||||
echo "$as_me: failed program was:" >&5
|
||||
sed 's/^/| /' conftest.$ac_ext >&5
|
||||
|
||||
# It does not; compile a test program.
|
||||
if test "$cross_compiling" = yes; then
|
||||
# try to guess the endianness by grepping values into an object file
|
||||
ac_cv_c_bigendian=unknown
|
||||
cat >conftest.$ac_ext <<_ACEOF
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
short ascii_mm[] = { 0x4249, 0x4765, 0x6E44, 0x6961, 0x6E53, 0x7953, 0 };
|
||||
short ascii_ii[] = { 0x694C, 0x5454, 0x656C, 0x6E45, 0x6944, 0x6E61, 0 };
|
||||
void _ascii () { char *s = (char *) ascii_mm; s = (char *) ascii_ii; }
|
||||
short ebcdic_ii[] = { 0x89D3, 0xE3E3, 0x8593, 0x95C5, 0x89C4, 0x9581, 0 };
|
||||
short ebcdic_mm[] = { 0xC2C9, 0xC785, 0x95C4, 0x8981, 0x95E2, 0xA8E2, 0 };
|
||||
void _ebcdic () { char *s = (char *) ebcdic_mm; s = (char *) ebcdic_ii; }
|
||||
int
|
||||
main ()
|
||||
{
|
||||
_ascii (); _ebcdic ();
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
rm -f conftest.$ac_objext
|
||||
if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
|
||||
(eval $ac_compile) 2>conftest.er1
|
||||
ac_status=$?
|
||||
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_objext'
|
||||
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
|
||||
(eval $ac_try) 2>&5
|
||||
ac_status=$?
|
||||
echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); }; }; then
|
||||
if grep BIGenDianSyS conftest.$ac_objext >/dev/null ; then
|
||||
ac_cv_c_bigendian=yes
|
||||
fi
|
||||
if grep LiTTleEnDian conftest.$ac_objext >/dev/null ; then
|
||||
if test "$ac_cv_c_bigendian" = unknown; then
|
||||
ac_cv_c_bigendian=no
|
||||
else
|
||||
# finding both strings is unlikely to happen, but who knows?
|
||||
ac_cv_c_bigendian=unknown
|
||||
fi
|
||||
fi
|
||||
else
|
||||
echo "$as_me: failed program was:" >&5
|
||||
sed 's/^/| /' conftest.$ac_ext >&5
|
||||
|
||||
fi
|
||||
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
|
||||
else
|
||||
cat >conftest.$ac_ext <<_ACEOF
|
||||
/* confdefs.h. */
|
||||
_ACEOF
|
||||
cat confdefs.h >>conftest.$ac_ext
|
||||
cat >>conftest.$ac_ext <<_ACEOF
|
||||
/* end confdefs.h. */
|
||||
int
|
||||
main ()
|
||||
{
|
||||
/* Are we little or big endian? From Harbison&Steele. */
|
||||
union
|
||||
{
|
||||
long l;
|
||||
char c[sizeof (long)];
|
||||
} u;
|
||||
u.l = 1;
|
||||
exit (u.c[sizeof (long) - 1] == 1);
|
||||
}
|
||||
_ACEOF
|
||||
rm -f conftest$ac_exeext
|
||||
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
|
||||
(eval $ac_link) 2>&5
|
||||
ac_status=$?
|
||||
echo "$as_me:$LINENO: \$? = $ac_status" >&5
|
||||
(exit $ac_status); } && { ac_try='./conftest$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 $ac_status); }; }; then
|
||||
ac_cv_c_bigendian=no
|
||||
else
|
||||
echo "$as_me: program exited with status $ac_status" >&5
|
||||
echo "$as_me: failed program was:" >&5
|
||||
sed 's/^/| /' conftest.$ac_ext >&5
|
||||
|
||||
( exit $ac_status )
|
||||
ac_cv_c_bigendian=yes
|
||||
fi
|
||||
rm -f core *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
|
||||
fi
|
||||
fi
|
||||
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
|
||||
fi
|
||||
echo "$as_me:$LINENO: result: $ac_cv_c_bigendian" >&5
|
||||
echo "${ECHO_T}$ac_cv_c_bigendian" >&6
|
||||
case $ac_cv_c_bigendian in
|
||||
yes)
|
||||
|
||||
cat >>confdefs.h <<\_ACEOF
|
||||
#define WORDS_BIGENDIAN 1
|
||||
_ACEOF
|
||||
;;
|
||||
no)
|
||||
;;
|
||||
*)
|
||||
{ { echo "$as_me:$LINENO: error: unknown endianness
|
||||
presetting ac_cv_c_bigendian=no (or yes) will help" >&5
|
||||
echo "$as_me: error: unknown endianness
|
||||
presetting ac_cv_c_bigendian=no (or yes) will help" >&2;}
|
||||
{ (exit 1); exit 1; }; } ;;
|
||||
esac
|
||||
|
||||
echo "$as_me:$LINENO: checking for an ANSI C-conforming const" >&5
|
||||
echo $ECHO_N "checking for an ANSI C-conforming const... $ECHO_C" >&6
|
||||
if test "${ac_cv_c_const+set}" = set; then
|
||||
echo $ECHO_N "(cached) $ECHO_C" >&6
|
||||
|
||||
Reference in New Issue
Block a user