added lua detection to configure

1 files changed, 47 insertions, 3 deletions

diff --git a/src/configure b/src/configure
index fdc1e0c..49562cf 100755
--- a/src/configure
+++ b/src/configure
@@ -138,10 +138,54 @@ case $CRYPTO_LIB in
   ;;
 esac
 
+test_lua_version()
+{
+  LUA_VERSION=`cat $1 | grep "#define LUA_VERSION[ 	]" | cut -f2- | tr -d '"' | sed -e 's/Lua \([0-9][0-9.]*\)/\1/'`
+  LUA_VERSION_NUM=`cat $1 | grep "#define LUA_VERSION_NUM" | awk '{ print $3 }'`
+  LUA_RELEASE=`cat $1 | grep "#define LUA_RELEASE[ 	]" | cut -f2-`
+
+  if [ $LUA_VERSION_NUM -ge 500 ]; then
+    return 1;
+  else
+    return 0;
+  fi
+}
+
 if [ -z "$LUA_DIR" ]; then
-  CFLAGS="$CFLAGS -I/usr/include/lua5.1"
-  LDFLAGS="$LDFLAGS -llua5.1"
-  LUAC=luac5.1
+  for prefix in /usr /usr/local; do
+    if [ -e $prefix/include/lua.h ]; then
+      test_lua_version $prefix/include/lua.h
+      if [ $? -eq 1 ]; then
+        echo "using Lua $LUA_VERSION ($LUA_RELEASE) found at $prefix/include"
+        CFLAGS="$CFLAGS -I$prefix/include"
+        LDFLAGS="$LDFLAGS -L$prefix/lib -llua"
+        LUAC=$prefix/luac
+        break
+      fi
+    else
+      for dir in $prefix/include/lua*; do
+        if [ -e $dir/lua.h ]; then
+          test_lua_version $dir/lua.h
+          if [ $? -eq 1 ]; then
+            echo "using Lua $LUA_VERSION ($LUA_RELEASE) found at $dir"
+            CFLAGS="$CFLAGS -I$dir"
+            LDFLAGS="$LDFLAGS -L$prefix/lib -llua$LUA_VERSION"
+            LUAC=$prefix/bin/luac$LUA_VERSION
+            break
+          fi
+        fi
+      done
+      if [ -n $LUAC ]; then
+        break
+      fi
+    fi
+  done
+
+  if [ -z $LUAC ]; then
+    echo "ERROR: no suitable lua found .. please install lua 5.1 or higher or use --with-lua"
+    return 1
+  fi
+
 else
   CFLAGS="$CFLAGS -I$LUA_DIR/include"
   LDFLAGS="$LDFLAGS $LUA_DIR/lib/liblua.a"