diff options
Diffstat (limited to 'm4/strchrnul.m4')
| -rw-r--r-- | m4/strchrnul.m4 | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/m4/strchrnul.m4 b/m4/strchrnul.m4 index a64e805..b59eda9 100644 --- a/m4/strchrnul.m4 +++ b/m4/strchrnul.m4 @@ -1,5 +1,5 @@ -# strchrnul.m4 serial 7 -dnl Copyright (C) 2003, 2007, 2009-2011 Free Software Foundation, Inc. +# strchrnul.m4 serial 9 +dnl Copyright (C) 2003, 2007, 2009-2013 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. @@ -10,10 +10,39 @@ AC_DEFUN([gl_FUNC_STRCHRNUL], AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS]) - AC_REPLACE_FUNCS([strchrnul]) + AC_CHECK_FUNCS([strchrnul]) if test $ac_cv_func_strchrnul = no; then HAVE_STRCHRNUL=0 - gl_PREREQ_STRCHRNUL + else + AC_CACHE_CHECK([whether strchrnul works], + [gl_cv_func_strchrnul_works], + [AC_RUN_IFELSE([AC_LANG_PROGRAM([[ +#include <string.h> /* for strchrnul */ +]], [[const char *buf = "a"; + return strchrnul (buf, 'b') != buf + 1; + ]])], + [gl_cv_func_strchrnul_works=yes], + [gl_cv_func_strchrnul_works=no], + [dnl Cygwin 1.7.9 introduced strchrnul, but it was broken until 1.7.10 + AC_EGREP_CPP([Lucky user], + [ +#if defined __CYGWIN__ + #include <cygwin/version.h> + #if CYGWIN_VERSION_DLL_COMBINED > CYGWIN_VERSION_DLL_MAKE_COMBINED (1007, 9) + Lucky user + #endif +#else + Lucky user +#endif + ], + [gl_cv_func_strchrnul_works="guessing yes"], + [gl_cv_func_strchrnul_works="guessing no"]) + ]) + ]) + case "$gl_cv_func_strchrnul_works" in + *yes) ;; + *) REPLACE_STRCHRNUL=1 ;; + esac fi ]) |