sound/lame: Add optional experimental optimization

Add optional experimental optimization
Generic approach for --enable-expopt=full

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

sound/lame/Config.in

@@ -0,0 +1,12 @@
+menu "Configuration"
+	depends on PACKAGE_lame-lib
+
+config LAME-LIB_OPTIMIZE_SPEED
+	bool "Optimize for speed"
+	default n
+	help
+		This enables additional experimental
+		optmization and increases performance 
+		considerably at the expense of binary size.
+
+endmenu

sound/lame/Makefile

@@ -22,6 +22,8 @@ PKG_MAINTAINER:=Ted Hess <thess@kitschensync.net>
 PKG_LICENSE:=LGPL-2.0
 PKG_LICENSE_FILES:=COPYING LICENSE
 
+PKG_CONFIG_DEPENDS:= CONFIG_LAME-LIB_OPTIMIZE_SPEED
+
 include $(INCLUDE_DIR)/package.mk
 
 PKG_INSTALL=1
@@ -43,6 +45,10 @@ define Package/lame/description
 lame mp3 encoder
 endef
 
+define Package/lame-lib/config
+	source "$(SOURCE)/Config.in"
+endef
+
 define Package/lame-lib
 $(call Package/lame/Default)
   TITLE:=lame-lib
@@ -56,6 +62,11 @@ ifeq ($(ARCH),i386)
 TARGET_CFLAGS+=-msse
 endif
 
+ifeq ($(CONFIG_LAME-LIB_OPTIMIZE_SPEED),y)
+	TARGET_CFLAGS += $(TARGET_CFLAGS) -O3 -fomit-frame-pointer -ffast-math -fschedule-insns2
+	TARGET_CFLAGS := $(filter-out -Os,$(TARGET_CFLAGS))
+endif
+
 CONFIGURE_ARGS += --disable-gtktest --disable-static
 
 define Package/lame/install