diff options
Diffstat (limited to 'gnulib-m4/vasnprintf.m4')
| -rw-r--r-- | gnulib-m4/vasnprintf.m4 | 40 |
1 files changed, 35 insertions, 5 deletions
diff --git a/gnulib-m4/vasnprintf.m4 b/gnulib-m4/vasnprintf.m4 index 21a85bb1..a02f4e1e 100644 --- a/gnulib-m4/vasnprintf.m4 +++ b/gnulib-m4/vasnprintf.m4 @@ -1,4 +1,5 @@ -# vasnprintf.m4 serial 52 +# vasnprintf.m4 +# serial 54 dnl Copyright (C) 2002-2004, 2006-2024 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -6,8 +7,40 @@ dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_VASNPRINTF], [ + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CHECK_FUNCS_ONCE([vasnprintf]) - if test $ac_cv_func_vasnprintf = no; then + if test $ac_cv_func_vasnprintf = yes; then + dnl On Cygwin, in directives with a huge width, the width is ignored, and + dnl the function returns a wrong result. + AC_CACHE_CHECK([whether vasnprintf works], + [gl_cv_func_vasnprintf_works], + [AC_RUN_IFELSE( + [AC_LANG_SOURCE( + [[#include <stdio.h> + ]], + [[size_t len; + char *res = vasnprintf (NULL, &len, "x%03000000000dy\n", -17); + /* On Cygwin 3.4.6, res is "x-17y\n" and len == 6: wrong. */ + return (res != NULL && len < 10); + ]]) + ], + [gl_cv_func_vasnprintf_works=yes], + [gl_cv_func_vasnprintf_works=no], + [case "$host_os" in + # Guess no on Cygwin. + cygwin*) gl_cv_func_vasnprintf_works="guessing no";; + # If we don't know, obey --enable-cross-guesses. + *) gl_cv_func_vasnprintf_works="$gl_cross_guess_normal";; + esac + ]) + ]) + fi + if test $ac_cv_func_vasnprintf != yes \ + || case "$gl_cv_func_vasnprintf_works" in + *yes) false;; + *) true;; + esac + then gl_REPLACE_VASNPRINTF fi ]) @@ -41,7 +74,6 @@ AC_DEFUN([gl_FUNC_VASNWPRINTF], # Prerequisites of lib/printf-args.h, lib/printf-args.c. AC_DEFUN([gl_PREREQ_PRINTF_ARGS], [ - AC_REQUIRE([gt_TYPE_WCHAR_T]) AC_REQUIRE([gt_TYPE_WINT_T]) ]) @@ -50,7 +82,6 @@ AC_DEFUN([gl_PREREQ_PRINTF_ARGS], AC_DEFUN([gl_PREREQ_PRINTF_PARSE], [ AC_REQUIRE([gl_FEATURES_H]) - AC_REQUIRE([gt_TYPE_WCHAR_T]) AC_REQUIRE([gt_TYPE_WINT_T]) AC_REQUIRE([AC_TYPE_SIZE_T]) AC_CHECK_TYPE([ptrdiff_t], , @@ -184,7 +215,6 @@ int main() AC_DEFUN_ONCE([gl_PREREQ_VASNXPRINTF], [ AC_REQUIRE([AC_FUNC_ALLOCA]) - AC_REQUIRE([gt_TYPE_WCHAR_T]) AC_REQUIRE([gt_TYPE_WINT_T]) AC_CHECK_FUNCS([wcslen]) dnl Knowing DBL_EXPBIT0_WORD and DBL_EXPBIT0_BIT enables an optimization |