-# strcasestr.m4 serial 16
-dnl Copyright (C) 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+# strcasestr.m4 serial 21
+dnl Copyright (C) 2005, 2007-2014 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.
]])],
[gl_cv_func_strcasestr_works_always=yes],
[gl_cv_func_strcasestr_works_always=no],
- [dnl glibc 2.12 and cygwin 1.7.7 have a known bug. Assume that it
- dnl works on all other platforms, even if it is not linear.
+ [dnl glibc 2.12 and cygwin 1.7.7 have a known bug. uClibc is not
+ dnl affected, since it uses different source code for strcasestr
+ dnl than glibc.
+ dnl Assume that it works on all other platforms, even if it is not
+ dnl linear.
AC_EGREP_CPP([Lucky user],
[
#ifdef __GNU_LIBRARY__
#include <features.h>
- #if (__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)
+ #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
+ || defined __UCLIBC__
Lucky user
#endif
#elif defined __CYGWIN__
Lucky user
#endif
],
- [gl_cv_func_strcasestr_works_always=yes],
+ [gl_cv_func_strcasestr_works_always="guessing yes"],
[gl_cv_func_strcasestr_works_always="guessing no"])
])
])
- if test "$gl_cv_func_strcasestr_works_always" != yes; then
- REPLACE_STRCASESTR=1
- AC_LIBOBJ([strcasestr])
- fi
+ case "$gl_cv_func_strcasestr_works_always" in
+ *yes) ;;
+ *)
+ REPLACE_STRCASESTR=1
+ ;;
+ esac
fi
fi
- if test $HAVE_STRCASESTR = 0 || test $REPLACE_STRCASESTR = 1; then
- AC_LIBOBJ([strcasestr])
- gl_PREREQ_STRCASESTR
- fi
]) # gl_FUNC_STRCASESTR_SIMPLE
dnl Additionally, check that strcasestr is efficient.
#include <stdlib.h> /* for malloc */
#include <unistd.h> /* for alarm */
static void quit (int sig) { exit (sig + 128); }
-]], [[size_t m = 1000000;
+]], [[
+ int result = 0;
+ size_t m = 1000000;
char *haystack = (char *) malloc (2 * m + 2);
char *needle = (char *) malloc (m + 2);
- void *result = 0;
/* Failure to compile this test due to missing alarm is okay,
since all such platforms (mingw) also lack strcasestr. */
signal (SIGALRM, quit);
memset (needle, 'A', m);
needle[m] = 'B';
needle[m + 1] = 0;
- result = strcasestr (haystack, needle);
+ if (!strcasestr (haystack, needle))
+ result |= 1;
}
- return !result;]])],
+ return result;
+ ]])],
[gl_cv_func_strcasestr_linear=yes], [gl_cv_func_strcasestr_linear=no],
[dnl Only glibc > 2.12 and cygwin > 1.7.7 are known to have a
dnl strcasestr that works in linear time.
[
#include <features.h>
#ifdef __GNU_LIBRARY__
- #if (__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)
+ #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
+ && !defined __UCLIBC__
Lucky user
#endif
#endif
#endif
#endif
],
- [gl_cv_func_strcasestr_linear=yes],
+ [gl_cv_func_strcasestr_linear="guessing yes"],
[gl_cv_func_strcasestr_linear="guessing no"])
])
])
- if test "$gl_cv_func_strcasestr_linear" != yes; then
- REPLACE_STRCASESTR=1
- AC_LIBOBJ([strcasestr])
- gl_PREREQ_STRCASESTR
- fi
+ case "$gl_cv_func_strcasestr_linear" in
+ *yes) ;;
+ *)
+ REPLACE_STRCASESTR=1
+ ;;
+ esac
fi
]) # gl_FUNC_STRCASESTR