diff options
Diffstat (limited to 'gnulib/m4/memcmp.m4')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/m4/memcmp.m4 | 61 |
2 files changed, 61 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/m4/memcmp.m4 b/gnulib/m4/memcmp.m4 new file mode 100644 index 0000000..dcc2212 --- /dev/null +++ b/gnulib/m4/memcmp.m4 @@ -0,0 +1,61 @@ +# memcmp.m4 serial 16 +dnl Copyright (C) 2002-2004, 2007-2011 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. + +AC_DEFUN([gl_FUNC_MEMCMP], +[ + dnl We don't use AC_FUNC_MEMCMP any more, because it is no longer maintained + dnl in Autoconf and because it invokes AC_LIBOBJ. + AC_CACHE_CHECK([for working memcmp], [gl_cv_func_memcmp_working], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [AC_INCLUDES_DEFAULT], + [[/* Some versions of memcmp are not 8-bit clean. */ + char c0 = '\100', c1 = '\200', c2 = '\201'; + if (memcmp(&c0, &c2, 1) >= 0 || memcmp(&c1, &c2, 1) >= 0) + return 1; + /* The Next x86 OpenStep bug shows up only when comparing 16 bytes + or more and with at least one buffer not starting on a 4-byte + boundary. William Lewis provided this test program. */ + { + char foo[21]; + char bar[21]; + int i; + for (i = 0; i < 4; i++) + { + char *a = foo + i; + char *b = bar + i; + strcpy (a, "--------01111111"); + strcpy (b, "--------10000000"); + if (memcmp (a, b, 16) >= 0) + return 1; + } + return 0; + } + ]])], + [gl_cv_func_memcmp_working=yes], + [gl_cv_func_memcmp_working=no], + [dnl When cross-compiling, guess memcmp works when it exists. + dnl This is useful for mingw. + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#include <string.h>]], + [[int ret = memcmp ("foo", "bar", 0);]])], + [gl_cv_func_memcmp_working="guessing yes"], + [gl_cv_func_memcmp_working="guessing no"]) + ]) + ]) + case "$gl_cv_func_memcmp_working" in + *yes) gl_func_memcmp=yes ;; + *) gl_func_memcmp=no ;; + esac + if test $gl_func_memcmp = no; then + AC_DEFINE([memcmp], [rpl_memcmp], + [Define to rpl_memcmp if the replacement function should be used.]) + fi +]) + +# Prerequisites of lib/memcmp.c. +AC_DEFUN([gl_PREREQ_MEMCMP], [:]) |