Merge pull request #184 from t6/alloca

Check for alloca.h in the configure script

cava.c

@@ -1,12 +1,10 @@
 #define _XOPEN_SOURCE_EXTENDED
 #include <locale.h>
 
-#ifdef SNDIO
-#include <stdlib.h>
-#endif
-
-#ifndef SNDIO
+#ifdef HAVE_ALLOCA_H
 #include <alloca.h>
+#else
+#include <stdlib.h>
 #endif
 
 #include <stdio.h>
@@ -63,11 +61,6 @@
 
 #ifdef SNDIO
 #include "input/sndio.c"
-#include <stdlib.h>
-#endif
-
-#ifndef SNDIO
-#include <alloca.h>
 #endif
 
 #include <iniparser.h>

configure.ac

@@ -36,6 +36,11 @@ AC_CHECK_HEADERS([pthread.h],
 	AC_MSG_ERROR([no pthread.h header header file found])
 )
 
+dnl ######################
+dnl checking for alloca.h
+dnl ######################
+
+AC_CHECK_HEADER([alloca.h], [CPPFLAGS="$CPPFLAGS -DHAVE_ALLOCA_H"])
 
 dnl ######################
 dnl checking for alsa dev