diff options
Diffstat (limited to 'gl/m4/vasnprintf.m4')
| -rw-r--r-- | gl/m4/vasnprintf.m4 | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/gl/m4/vasnprintf.m4 b/gl/m4/vasnprintf.m4 index 50a20cca..ebe3c52c 100644 --- a/gl/m4/vasnprintf.m4 +++ b/gl/m4/vasnprintf.m4 @@ -1,4 +1,4 @@ -# vasnprintf.m4 serial 29 +# vasnprintf.m4 serial 31 dnl Copyright (C) 2002-2004, 2006-2010 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -54,6 +54,7 @@ AC_DEFUN([gl_PREREQ_PRINTF_PARSE], # Prerequisites of lib/vasnprintf.c. AC_DEFUN_ONCE([gl_PREREQ_VASNPRINTF], [ + AC_REQUIRE([AC_C_INLINE]) AC_REQUIRE([AC_FUNC_ALLOCA]) AC_REQUIRE([AC_TYPE_LONG_LONG_INT]) AC_REQUIRE([gt_TYPE_WCHAR_T]) @@ -62,6 +63,17 @@ AC_DEFUN_ONCE([gl_PREREQ_VASNPRINTF], dnl Use the _snprintf function only if it is declared (because on NetBSD it dnl is defined as a weak alias of snprintf; we prefer to use the latter). AC_CHECK_DECLS([_snprintf], , , [#include <stdio.h>]) + dnl We can avoid a lot of code by assuming that snprintf's return value + dnl conforms to ISO C99. So check that. + AC_REQUIRE([gl_SNPRINTF_RETVAL_C99]) + case "$gl_cv_func_snprintf_retval_c99" in + *yes) + AC_DEFINE([HAVE_SNPRINTF_RETVAL_C99], [1], + [Define if the return value of the snprintf function is the number of + of bytes (excluding the terminating NUL) that would have been produced + if the buffer had been large enough.]) + ;; + esac ]) # Extra prerequisites of lib/vasnprintf.c for supporting 'long double' |