diff options
Diffstat (limited to 'config/c-library.m4')
| -rw-r--r-- | config/c-library.m4 | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/config/c-library.m4 b/config/c-library.m4 index 679f3844b8..aa6aa397f1 100644 --- a/config/c-library.m4 +++ b/config/c-library.m4 @@ -1,5 +1,5 @@ # Macros that test various C library quirks -# $PostgreSQL: pgsql/config/c-library.m4,v 1.29 2004/12/16 17:48:26 momjian Exp $ +# $PostgreSQL: pgsql/config/c-library.m4,v 1.30 2005/02/22 03:55:50 momjian Exp $ # PGAC_VAR_INT_TIMEZONE @@ -266,3 +266,36 @@ case $pgac_cv_snprintf_long_long_int_format in LONG_LONG_INT_FORMAT=$pgac_cv_snprintf_long_long_int_format;; *) AC_MSG_RESULT(none);; esac])# PGAC_FUNC_SNPRINTF_LONG_LONG_INT_FORMAT + + +# PGAC_FUNC_PRINTF_ARG_CONTROL +# --------------------------------------- +# 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. +# +AC_DEFUN([PGAC_FUNC_PRINTF_ARG_CONTROL], +[AC_MSG_CHECKING([printf supports argument control]) +AC_CACHE_VAL(pgac_cv_printf_arg_control, +[AC_TRY_RUN([#include <stdio.h> + +int does_printf_have_arg_control() +{ + 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()); +}], +[pgac_cv_printf_arg_control=yes], +[pgac_cv_printf_arg_control=no], +[pgac_cv_printf_arg_control=cross]) +])dnl AC_CACHE_VAL +AC_MSG_RESULT([$pgac_cv_printf_arg_control]) +])# PGAC_FUNC_PRINTF_ARG_CONTROL |