libsoc: fix compilation error caused by multiple goals on make

Error of the following kind can happen when parallel build with goals "all" and
"install" both specified on the command line.  Seems like make can parallelly
build for both targets causing race conditions

	make[3]: Entering directory `/tmp/tmp.HIR3tEIqBb/build_dir/target-mips_24kc_musl/libsoc-2016-12-22-5b788d4d'
	Making all in lib
	Making install in lib
	make[4]: Entering directory `/tmp/tmp.HIR3tEIqBb/build_dir/target-mips_24kc_musl/libsoc-2016-12-22-5b788d4d/lib'
	  CC       libsoc_la-gpio.lo
	make[4]: Entering directory `/tmp/tmp.HIR3tEIqBb/build_dir/target-mips_24kc_musl/libsoc-2016-12-22-5b788d4d/lib'
	  CC       libsoc_la-spi.lo
	  CC       libsoc_la-gpio.lo
	  CC       libsoc_la-file.lo
	  CC       libsoc_la-i2c.lo
	  CC       libsoc_la-spi.lo
	  CC       libsoc_la-pwm.lo
	  CC       libsoc_la-board.lo
	  CC       libsoc_la-file.lo
	  CC       libsoc_la-conffile.lo
	  CC       libsoc_la-debug.lo
	  CC       libsoc_la-pwm.lo
	  CC       libsoc_la-conffile.lo
	  CCLD     libsoc.la
	OpenWrt-libtool: link: `libsoc_la-pwm.lo' is not a valid libtool object
	make[4]: *** [libsoc.la] Error 1

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
(cherry-picked from 19bde8da683bfee543b3815d0614e7bf900acda3)

diff --git a/libs/libsoc/Makefile b/libs/libsoc/Makefile
index 8209960b93cc9ebb506a245b771802cbe47bc976..c733a58110712b4d6f9694e5d9e3da614b2e2cc6 100644 (file)
--- a/libs/libsoc/Makefile
+++ b/libs/libsoc/Makefile
@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libsoc
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://github.com/jackmitch/libsoc.git
@@ -43,11 +43,6 @@ CONFIGURE_ARGS += \
        --enable-static \
        --disable-cxx
 
-MAKE_FLAGS += \
-       CFLAGS="$(TARGET_CFLAGS)" \
-       DESTDIR="$(PKG_INSTALL_DIR)" \
-       all install
-
 define Build/InstallDev
        $(INSTALL_DIR) $(1)/usr/include
        $(CP) $(PKG_INSTALL_DIR)/usr/include/libsoc_board.h $(1)/usr/include/