Fix GH-11408: Unable to build PHP 8.3.0 alpha 1 / fileinfo extension

On some configurations, the COMPILE_DL_FILEINFO must come from the
config.h file. If the COMPILE_DL_FILEINFO macro is not set, the build
won't include the ZEND_GET_MODULE block necessary for building this
extension as a shared object.

Closes GH-11505.

NEWS

@@ -6,6 +6,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-11507 (String concatenation performance regression in 8.3).
     (nielsdos)
 
+- Fileinfo:
+  . Fix GH-11408 (Unable to build PHP 8.3.0 alpha 1 / fileinfo extension).
+    (nielsdos)
+
 - MBString:
   . Implement mb_str_pad() RFC. (nielsdos)
 

ext/fileinfo/fileinfo.c

@@ -14,6 +14,9 @@
   +----------------------------------------------------------------------+
 */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
 #include "php.h"
 
 #include "libmagic/magic.h"