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Detect PG_PRINTF_ATTRIBUTE automatically.

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This eliminates gobs of "unrecognized format function type" warnings
under MinGW compilers predating GCC 4.4.
This commit is contained in:
Noah Misch
2014-11-23 09:34:03 -05:00
parent b62f94c603
commit b779168ffe
5 changed files with 61 additions and 16 deletions
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36
configure vendored
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@ -10094,6 +10094,42 @@ _ACEOF
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for printf format archetype" >&5
$as_echo_n "checking for printf format archetype... " >&6; }
if ${pgac_cv_printf_archetype+:} false; then :
$as_echo_n "(cached) " >&6
else
ac_save_c_werror_flag=$ac_c_werror_flag
ac_c_werror_flag=yes
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
extern int
pgac_write(int ignore, const char *fmt,...)
__attribute__((format(gnu_printf, 2, 3)));
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
pgac_cv_printf_archetype=gnu_printf
else
pgac_cv_printf_archetype=printf
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
ac_c_werror_flag=$ac_save_c_werror_flag
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_printf_archetype" >&5
$as_echo "$pgac_cv_printf_archetype" >&6; }
cat >>confdefs.h <<_ACEOF
#define PG_PRINTF_ATTRIBUTE $pgac_cv_printf_archetype
_ACEOF
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for flexible array members" >&5
$as_echo_n "checking for flexible array members... " >&6; }