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Clean up printf arg-control test, per Kurt Roeckx.

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This commit is contained in:
Tom Lane
2005-02-24 01:34:45 +00:00
parent 41994145d4
commit e71d09a472
2 changed files with 17 additions and 21 deletions
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20
config/c-library.m4
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@ -1,5 +1,5 @@
# Macros that test various C library quirks
# $PostgreSQL: pgsql/config/c-library.m4,v 1.30 2005/02/22 03:55:50 momjian Exp $
# $PostgreSQL: pgsql/config/c-library.m4,v 1.31 2005/02/24 01:34:45 tgl Exp $
# PGAC_VAR_INT_TIMEZONE
@ -273,25 +273,23 @@ esac])# PGAC_FUNC_SNPRINTF_LONG_LONG_INT_FORMAT
# Determine if printf supports %1$ argument selection, e.g. %5$ selects
# the fifth argument after the printf print string.
# This is not in the C99 standard, but in the Single Unix Specification (SUS).
# It is used in our langauge translation strings.
# It is used in our language translation strings.
#
AC_DEFUN([PGAC_FUNC_PRINTF_ARG_CONTROL],
[AC_MSG_CHECKING([printf supports argument control])
[AC_MSG_CHECKING([whether printf supports argument control])
AC_CACHE_VAL(pgac_cv_printf_arg_control,
[AC_TRY_RUN([#include <stdio.h>
#include <string.h>
int does_printf_have_arg_control()
int main()
{
char buf[100];
/* can it swap arguments? */
snprintf(buf, 100, "%2$d|%1$d", 3, 4);
if (strcmp(buf, "4|3") != 0)
return 0;
return 1;
}
main() {
exit(! does_printf_have_arg_control());
snprintf(buf, 100, "%2\$d %1\$d", 3, 4);
if (strcmp(buf, "4 3") != 0)
return 1;
return 0;
}],
[pgac_cv_printf_arg_control=yes],
[pgac_cv_printf_arg_control=no],