espeak: Compile with uClibc++

Several Makefile cleanups.

Added PKG_BUILD_PARALLEL for faster compilation.

Several size optimizations applied.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

sound/espeak/Makefile

@@ -12,20 +12,22 @@ PKG_RELEASE:=2
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-source.zip
 PKG_SOURCE_URL:=@SF/espeak
 PKG_HASH:=bf9a17673adffcc28ff7ea18764f06136547e97bbd9edf2ec612f09b207f0659
+PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)-source
 
-PKG_LICENSE:=GPL-3.0
+PKG_MAINTAINER:=
+PKG_LICENSE:=GPL-3.0-or-later
 PKG_LICENSE_FILES:=License.txt
-PKG_MAINTAINER:=Nicolas Thill <nico@openwrt.org>
 
-PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)-source
 PKG_INSTALL:=1
+PKG_BUILD_PARALLEL:=1
 
+include $(INCLUDE_DIR)/uclibc++.mk
 include $(INCLUDE_DIR)/package.mk
 
 define Package/espeak
   SECTION:=sound
   CATEGORY:=Sound
-  DEPENDS:=+libpthread +libstdcpp +portaudio
+  DEPENDS:=$(CXX_DEPENDS) +portaudio
   TITLE:=Speech synthesizer
   URL:=http://espeak.sourceforge.net/
 endef
@@ -35,23 +37,26 @@ define Package/espeak/description
  other languages.
 endef
 
+# Use system header for portaudio
+define Build/Prepare
+	$(call Build/Prepare/Default)
+	rm $(PKG_BUILD_DIR)/src/portaudio.h
+endef
+
 MAKE_FLAGS+= \
 	AUDIO="portaudio" \
 	DATADIR="/usr/share/espeak" \
-	CXXFLAGS="$(TARGET_CFLAGS)" \
+	CXXFLAGS="$(TARGET_CXXFLAGS)" \
 	LDFLAGS="$(TARGET_LDFLAGS)" \
 
 MAKE_PATH:=./src
 
-# Use system header for portaudio
-define Build/Prepare
-	$(call Build/Prepare/Default)
-	rm $(PKG_BUILD_DIR)/src/portaudio.h
-endef
+TARGET_CXXFLAGS += -std=c++14 -ffunction-sections -fdata-sections -flto
+TARGET_LDFLAGS += $(FPIC) $(if $(CONFIG_USE_GLIBC),-lm) -Wl,--gc-sections,--as-needed
 
 define Package/espeak/install
 	$(INSTALL_DIR) $(1)/usr/bin
-	$(CP) $(PKG_INSTALL_DIR)/usr/bin/espeak $(1)/usr/bin/
+	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/espeak $(1)/usr/bin/
 	$(INSTALL_DIR) $(1)/usr/lib
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libespeak.so.* $(1)/usr/lib/
 	$(INSTALL_DIR) $(1)/usr/share

sound/espeak/patches/010-uclibcxx.patch

@@ -0,0 +1,21 @@
+--- a/src/Makefile
++++ b/src/Makefile
+@@ -83,15 +83,15 @@ libespeak_SOURCES = speak_lib.cpp compiledict.cpp dictionary.cpp intonation.cpp
+ 
+ SRCS1=$(speak_SOURCES)
+ OBJS1=$(patsubst %.cpp,%.o,$(SRCS1))
+-LIBS1=-lstdc++ $(LIB_AUDIO) -lpthread $(EXTRA_LIBS)
++LIBS1=$(LIB_AUDIO) -lpthread $(EXTRA_LIBS)
+ 
+ SRCS2=$(libespeak_SOURCES)
+ OBJS2=$(patsubst %.cpp,x_%.o,$(SRCS2))
+-LIBS2=-lstdc++ $(LIB_AUDIO) -lpthread
++LIBS2=$(LIB_AUDIO) -lpthread
+ 
+ SRCS3 = espeak.cpp
+ OBJS3=$(patsubst %.cpp,%.o,$(SRCS3))
+-LIBS3=-lstdc++ -L . -lespeak
++LIBS3=-L . -lespeak
+ 
+ CXXFLAGS=-O2
+