Use a native strcasestr() if found.

2 files changed, 5 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index d93fc49cc..0a40e5595 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1900,6 +1900,7 @@ AC_CHECK_FUNCS( strtoll \
                 select \
                 strdup \
                 strstr \
+                strcasestr \
                 strtok_r \
                 uname \
                 strcasecmp \
diff --git a/lib/strequal.c b/lib/strequal.c
index cb8767002..adf84403d 100644
--- a/lib/strequal.c
+++ b/lib/strequal.c
@@ -90,6 +90,9 @@ int curl_strnequal(const char *first, const char *second, size_t max)
  */
 char *Curl_strcasestr(const char *haystack, const char *needle)
 {
+#if defined(HAVE_STRCASESTR)
+  return strcasestr(haystack, needle);
+#else
   size_t nlen = strlen(needle);
   size_t hlen = strlen(haystack);
 
@@ -99,6 +102,7 @@ char *Curl_strcasestr(const char *haystack, const char *needle)
     haystack++;
   }
   return NULL;
+#endif
 }
 
 #ifndef HAVE_STRLCAT