Merge pull request #3824 from orestisfl/ac_replace_funcs

Use AC_REPLACE_FUNCS

libi3/mkdirp.c

@@ -12,12 +12,11 @@
 #include <string.h>
 #include <sys/stat.h>
 
+#ifndef HAVE_mkdirp
 /*
  * Emulates mkdir -p (creates any missing folders)
  *
  */
-
-#if !defined(__sun)
 int mkdirp(const char *path, mode_t mode) {
     if (mkdir(path, mode) == 0)
         return 0;

libi3/strndup.c

@@ -10,8 +10,7 @@
 #include <sys/types.h>
 #include <string.h>
 
-#if defined(__APPLE__)
-
+#ifndef HAVE_strndup
 /*
  * Taken from FreeBSD
  * Returns a pointer to a new string which is a duplicate of the
@@ -30,5 +29,4 @@ char *strndup(const char *str, size_t n) {
     copy[len] = '\0';
     return (copy);
 }
-
 #endif