diff options
Diffstat (limited to 'm4/mbrlen.m4')
| -rw-r--r-- | m4/mbrlen.m4 | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/m4/mbrlen.m4 b/m4/mbrlen.m4 index 8bf0756..5baf8e3 100644 --- a/m4/mbrlen.m4 +++ b/m4/mbrlen.m4 @@ -1,5 +1,5 @@ -# mbrlen.m4 serial 8 -dnl Copyright (C) 2008, 2010-2012 Free Software Foundation, Inc. +# mbrlen.m4 serial 9 -*- coding: utf-8 -*- +dnl Copyright (C) 2008, 2010-2016 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -227,6 +227,40 @@ int main () ]) ]) +dnl Test whether mbrlen returns the correct value on empty input. + +AC_DEFUN([gl_MBRLEN_EMPTY_INPUT], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether mbrlen works on empty input], + [gl_cv_func_mbrlen_empty_input], + [ + dnl Initial guess, used when cross-compiling or when no suitable locale + dnl is present. +changequote(,)dnl + case "$host_os" in + # Guess no on AIX and glibc systems. + aix* | *-gnu*) + gl_cv_func_mbrlen_empty_input="guessing no" ;; + *) gl_cv_func_mbrlen_empty_input="guessing yes" ;; + esac +changequote([,])dnl + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ + #include <wchar.h> + static mbstate_t mbs; + int + main (void) + { + return mbrlen ("", 0, &mbs) != (size_t) -2; + }]])], + [gl_cv_func_mbrlen_empty_input=yes], + [gl_cv_func_mbrlen_empty_input=no], + [:]) + ]) +]) + # Prerequisites of lib/mbrlen.c. AC_DEFUN([gl_PREREQ_MBRLEN], [ : |