--- /dev/null
+Allow cache answer for strcasestr discovery.
+
+Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+
+diff -Nura php-5.6.7.orig/ext/fileinfo/config.m4 php-5.6.7/ext/fileinfo/config.m4
+--- php-5.6.7.orig/ext/fileinfo/config.m4 2015-04-08 22:19:45.798770792 -0300
++++ php-5.6.7/ext/fileinfo/config.m4 2015-04-08 22:26:33.110654338 -0300
+@@ -14,6 +14,7 @@
+ libmagic/readcdf.c libmagic/softmagic.c"
+
+ AC_MSG_CHECKING([for strcasestr])
++ AC_CACHE_VAL(ac_cv_func_strcasestr,
+ AC_TRY_RUN([
+ #include <string.h>
+ #include <strings.h>
+@@ -46,7 +47,7 @@
+ AC_MSG_RESULT(no)
+ AC_MSG_NOTICE(using libmagic strcasestr implementation)
+ libmagic_sources="$libmagic_sources libmagic/strcasestr.c"
+- ])
++ ]))
+
+ PHP_NEW_EXTENSION(fileinfo, fileinfo.c $libmagic_sources, $ext_shared,,-I@ext_srcdir@/libmagic)
+ PHP_ADD_BUILD_DIR($ext_builddir/libmagic)