cmake.mk: add host build support

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 45282

include/cmake.mk

@@ -32,6 +32,7 @@ CMAKE_NM:=$(call cmake_tool,$(TARGET_NM))
 CMAKE_RANLIB:=$(call cmake_tool,$(TARGET_RANLIB))
 
 CMAKE_FIND_ROOT_PATH:=$(STAGING_DIR);$(TOOLCHAIN_DIR)$(if $(CONFIG_EXTERNAL_TOOLCHAIN),;$(CONFIG_TOOLCHAIN_ROOT))
+CMAKE_HOST_FIND_ROOT_PATH:=$(STAGING_DIR_HOST)
 
 define Build/Configure/Default
 	(cd $(PKG_BUILD_DIR); \
@@ -77,3 +78,28 @@ define Build/InstallDev/cmake
 endef
 
 Build/InstallDev = $(if $(CMAKE_INSTALL),$(Build/InstallDev/cmake))
+
+define Host/Configure/Default
+	(cd $(HOST_BUILD_DIR); \
+		CFLAGS="$(HOST_CFLAGS)" \
+		CXXFLAGS="$(HOST_CFLAGS)" \
+		LDFLAGS="$(HOST_LDFLAGS)" \
+		cmake \
+			-DCMAKE_BUILD_TYPE=Release \
+			-DCMAKE_C_FLAGS_RELEASE="-DNDEBUG" \
+			-DCMAKE_CXX_FLAGS_RELEASE="-DNDEBUG" \
+			-DCMAKE_EXE_LINKER_FLAGS:STRING="$(HOST_LDFLAGS)" \
+			-DCMAKE_MODULE_LINKER_FLAGS:STRING="$(HOST_LDFLAGS)" \
+			-DCMAKE_SHARED_LINKER_FLAGS:STRING="$(HOST_LDFLAGS)" \
+			-DCMAKE_FIND_ROOT_PATH="$(CMAKE_HOST_FIND_ROOT_PATH)" \
+			-DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=BOTH \
+			-DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY \
+			-DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY \
+			-DCMAKE_STRIP=: \
+			-DCMAKE_INSTALL_PREFIX=$(STAGING_DIR_HOST) \
+			-DCMAKE_PREFIX_PATH=$(STAGING_DIR_HOST) \
+			-DCMAKE_SKIP_RPATH=TRUE  \
+			$(CMAKE_HOST_OPTIONS) \
+		$(CMAKE_SOURCE_DIR) \
+	)
+endef