libtiff: add HostBuild define

Package spandsp3 in telephony feed require this package as an host tool
for the tiffio.h header.

Add all the bits and define to compile this as an Host tool to permit
correct compilation of spandsp3 package.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

libs/tiff/Makefile

@@ -20,6 +20,7 @@ PKG_LICENSE:=libtiff
 PKG_LICENSE_FILES:=LICENSE.md
 PKG_CPE_ID:=cpe:/a:libtiff:libtiff
 
+include $(INCLUDE_DIR)/host-build.mk
 include $(INCLUDE_DIR)/package.mk
 include $(INCLUDE_DIR)/cmake.mk
 
@@ -46,6 +47,18 @@ $(call Package/tiff/Default)
   DEPENDS:=+libtiff +libstdcpp
 endef
 
+CMAKE_HOST_OPTIONS += \
+	-DCMAKE_REQUIRED_LIBRARIES="-lm" \
+	-Dld-version-script=OFF \
+	-Dold-jpeg=OFF \
+	-Djbig=OFF \
+	-Dlzma=OFF \
+	-Dzstd=OFF \
+	-Dwebp=OFF \
+	-Djpeg12=OFF \
+	-Dcxx=OFF \
+	-Dlibdeflate=OFF
+
 CMAKE_OPTIONS += \
 	-Dld-version-script=OFF \
 	-Dold-jpeg=OFF \
@@ -73,5 +86,6 @@ define Package/tiff-utils/install
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/* $(1)/usr/bin/
 endef
 
+$(eval $(call HostBuild))
 $(eval $(call BuildPackage,libtiff))
 $(eval $(call BuildPackage,tiff-utils))