Test for SUPPORTS_VLA in CMake

fluidsynth/CMakeLists.txt

@@ -98,6 +98,7 @@ check_include_file ( limits.h  HAVE_LIMITS_H )
 check_include_file ( pthread.h HAVE_PTHREAD_H ) 
 check_include_file ( signal.h HAVE_SIGNAL_H ) 
 include ( TestInline )
+include ( TestVLA )
 include ( TestBigEndian )
 test_big_endian ( WORDS_BIGENDIAN )
 

fluidsynth/cmake_admin/TestVLA.cmake

@@ -0,0 +1,9 @@
+include ( CheckCSourceCompiles )
+if ( NOT SUPPORTS_VLA )
+    check_c_source_compiles ( 
+        "int main(int argc, char *argv[]){int arr[argc]; return 0;}"
+        _have_vla )
+    if ( _have_vla )
+        set ( SUPPORTS_VLA 1 )
+    endif ( _have_vla )
+endif ( NOT SUPPORTS_VLA )

fluidsynth/src/config.cmake

@@ -193,6 +193,9 @@
 /* Define to use the readline library for line editing */
 #cmakedefine WITH_READLINE @WITH_READLINE@
 
+/* Define if the compiler supports VLA */ 
+#cmakedefine SUPPORTS_VLA @SUPPORTS_VLA@ 
+
 /* Define to 1 if your processor stores words with the most significant byte
    first (like Motorola and SPARC, unlike Intel and VAX). */
 #cmakedefine WORDS_BIGENDIAN @WORDS_BIGENDIAN@

fluidsynth/src/utils/fluidsynth_priv.h

@@ -163,7 +163,7 @@ typedef int fluid_socket_t;
 #define INVALID_SOCKET -1
 #endif
 
-#if SUPPORTS_VLA
+#if defined(SUPPORTS_VLA)
 #  define FLUID_DECLARE_VLA(_type, _name, _len) \
      _type _name[_len]
 #else