protobuf: fix libdir handling for host build

On some host machines (example: Gentoo amd64 no-multilib) by default
cmake will install libraries to lib64. But in OpenWrt the correct libdir
is lib (for instance the RPATH is set to lib). So you may end up with
libraries in lib64 while RPATH points to lib:

sk@darth ~/tmp/openwrt $ ldd staging_dir/hostpkg/bin/protoc
	linux-vdso.so.1 (0x00007ffc741ea000)
	libprotoc.so.3.8.0.0 => not found
	libprotobuf.so.3.8.0.0 => not found
	libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f0a8f7ea000)
	libstdc++.so.6 => /usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/libstdc++.so.6 (0x00007f0a8f572000)
	libm.so.6 => /lib64/libm.so.6 (0x00007f0a8f427000)
	libgcc_s.so.1 => /usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/libgcc_s.so.1 (0x00007f0a8f40d000)
	libc.so.6 => /lib64/libc.so.6 (0x00007f0a8f23c000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f0a8f827000)
sk@darth ~/tmp/openwrt $

Fix this by specifying the libdir during host builds.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

diff --git a/libs/protobuf/Makefile b/libs/protobuf/Makefile
index 251bdffa10794db67009eb0ec47a8af3f6b9b477..7d23a379d5184ab4f58b1e855325e90c6030c4a4 100644 (file)
--- a/libs/protobuf/Makefile
+++ b/libs/protobuf/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=protobuf
 PKG_VERSION:=3.8.0
-PKG_RELEASE:=4
+PKG_RELEASE:=5
 
 PKG_SOURCE:=$(PKG_NAME)-cpp-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://github.com/google/protobuf/releases/download/v$(PKG_VERSION)
@@ -72,6 +72,7 @@ CMAKE_HOST_OPTIONS += \
        -Dprotobuf_BUILD_TESTS=OFF \
        -DBUILD_SHARED_LIBS=ON \
        -DCMAKE_SKIP_RPATH=OFF \
+       -DCMAKE_INSTALL_LIBDIR=lib \
        -DCMAKE_INSTALL_RPATH="${STAGING_DIR_HOSTPKG}/lib"
 
 CMAKE_OPTIONS += \