From ba9fe029984b9b1614bdfc81072a3e95675bd74a Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Mon, 16 Sep 2013 11:24:18 +0000
Subject: added clang as optional compiler


diff --git a/configure b/configure
index f21f69d..10bb04d 100755
--- a/configure
+++ b/configure
@@ -23,8 +23,7 @@
 
 TARGET=`uname -s`
 
-CFLAGS='-g -O2'
-LDFLAGS='-g -Wall -O2'
+USE_CLANG=0
 
 LUA_LDFLAGS='-lm'
 LUA_DIR=''
@@ -33,6 +32,7 @@ print_usage() {
   echo "configure --help                    print this"
   echo "          --target=<TARGET>         build target i.e. Linux (default: autodetect)"
   echo "          --with-lua=<DIR>          use this lua tree instead of system default"
+  echo "          --use-clang               use clang/llvm as compiler/linker"
 }
 
 for arg
@@ -41,6 +41,9 @@ do
   --target=*)
     TARGET=${arg#--target=}
   ;;
+  --use-clang)
+    USE_CLANG=1
+  ;;
   --with-lua=*)
     LUA_DIR=${arg#--with-lua=}
   ;;
@@ -56,8 +59,18 @@ do
   esac
 done
 
+if [ $USE_CLANG -eq 0 ]; then
+  CFLAGS='-g -Wall -O2'
+  LDFLAGS='-g -Wall -O2'
+  COMPILER='gcc'
+else
+  CFLAGS='-g -O2'
+  LDFLAGS='-g -O2'
+  COMPILER='clang'
+fi
+
 rm -f include.mk
-case $TARGET in 
+case $TARGET in
   Linux)
     echo "Linux specific build options"
     LUA_LDFLAGS=$LUA_LDFLAGS' -ldl'
@@ -141,7 +154,7 @@ cat >> include.mk <<EOF
 # use ./configure instead
 
 TARGET := $TARGET
-CC := gcc
+CC := $COMPILER
 CFLAGS := $CFLAGS
 LDFLAGS := $LDFLAGS
 LUA_LDFLAGS := $LUA_LDFLAGS
-- 
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