From 8cedff6dfe4e39d55173218b7a4d67384d1ad124 Mon Sep 17 00:00:00 2001
From: Philip Walden <pcwalden@comcast.net>
Date: Fri, 23 Sep 2016 07:57:38 -0700
Subject: [PATCH] Adds --without-mmal option to configure. As documented in
 issue 169, the recentlay added MMAL camera support for the Raspberry Pi does
 not build on the Wheezy version of Raspbian. This option disables the
 autoconf generation of MMAL dependencies.

---
 configure.ac | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/configure.ac b/configure.ac
index 819e6343..9e945f75 100644
--- a/configure.ac
+++ b/configure.ac
@@ -389,14 +389,22 @@ AM_COND_IF([FOUND_PKGCONFIG],,[AC_MSG_ERROR([Required package 'pkg-config' not f
 
 # Check for raspberry pi mmal interface
 #
-HAVE_MMAL=""
-LIBRASPBERRYPIDEVPATH="/opt/vc/include/interface/mmal"
+WITHOUT_MMAL="no"
+AC_ARG_WITH([mmal],
+AS_HELP_STRING([--without-mmal],
+               [Compile without RaspberyPi mmal camera support]),
+WITHOUT_MMAL="yes",
+WITHOUT_MMAL="no")
 
-if test -d ${LIBRASPBERRYPIDEVPATH}; then
+if test "${WITHOUT_MMAL}" = "no"; then
+  HAVE_MMAL=""
+  LIBRASPBERRYPIDEVPATH="/opt/vc/include/interface/mmal"
+
+  if test -d ${LIBRASPBERRYPIDEVPATH}; then
        HAVE_MMAL="yes"
-fi
+  fi
 
-AS_IF([test "${HAVE_MMAL}" = "yes" ], [
+  AS_IF([test "${HAVE_MMAL}" = "yes" ], [
            AC_SUBST(MMAL_CFLAGS)
            AC_SUBST(MMAL_OBJ)
            AC_SUBST(MMAL_LIBS)
@@ -404,7 +412,8 @@ AS_IF([test "${HAVE_MMAL}" = "yes" ], [
            MMAL_CFLAGS="-std=gnu99 -DHAVE_MMAL -Irasppicam -I/opt/vc/include"
            MMAL_LIBS="-L/opt/vc/lib  -lmmal_core -lmmal_util -lmmal_vc_client -lvcos -lvchostif -lvchiq_arm"
            AC_DEFINE([HAVE_MMAL], 1, [Define to 1 if we want MMAL])
-])
+  ])
+fi
 
 #
 # Check for libavcodec and libavformat from ffmpeg
@@ -1230,6 +1239,8 @@ if test "${HAVE_MMAL}" = "yes"; then
     echo " ... MMAL_CFLAGS: $MMAL_CFLAGS"
     echo " ... MMAL_OBJ: $MMAL_OBJ"
     echo " ... MMAL_LIBS: $MMAL_LIBS"
+elif test "${WITHOUT_MMAL}" = "yes"; then
+    echo "MMAL support:        disabled"
 else
     echo "MMAL support:        No"
     echo " ... libraspberrypi-dev package not installed"