aclocal.m4: New file with new test libiberty_AC_FUNC_STRNCMP.

	* aclocal.m4: New file with new test libiberty_AC_FUNC_STRNCMP.

	* configure.in (AC_CHECK_HEADERS): Add sys/mman.h fcntl.h.
	(libiberty_AC_FUNC_STRNCMP): Invoke.

	* strncmp.c: New file.

From-SVN: r33498

1 files changed, 28 insertions, 0 deletions

diff --git a/libiberty/strncmp.c b/libiberty/strncmp.c
new file mode 100644
index 00000000000..b3b9de16b10
--- /dev/null
+++ b/libiberty/strncmp.c
@@ -0,0 +1,28 @@
+/* strncmp -- compare two strings, stop after n bytes.
+   This function is in the public domain.  */
+
+#include <ansidecl.h>
+#ifdef __STDC__
+#include <stddef.h>
+#else
+#define size_t unsigned long
+#endif
+
+int
+strncmp(s1, s2, n)
+     const char *s1, *s2;
+     register size_t n;
+{
+  register unsigned char u1, u2;
+
+  while (n-- > 0)
+    {
+      u1 = (unsigned char) *s1++;
+      u2 = (unsigned char) *s2++;
+      if (u1 != u2)
+	return u1 - u2;
+      if (u1 == '\0')
+	return 0;
+    }
+  return 0;
+}