cmake.mk: fix support for ccache

Signed-off-by: Felix Fietkau <[email protected]>

SVN-Revision: 38853

include/cmake.mk

@@ -24,9 +24,9 @@ else
     CCACHE:=$(STAGING_DIR_HOST)/bin/ccache
   endif
   CMAKE_C_COMPILER:=$(CCACHE)
-  CMAKE_C_COMPILER_ARG1:=$(filter-out ccache,$(TARGET_CC))
+  CMAKE_C_COMPILER_ARG1:=$(TARGET_CC_NOCACHE)
   CMAKE_CXX_COMPILER:=$(CCACHE)
-  CMAKE_CXX_COMPILER_ARG1:=$(filter-out ccache,$(TARGET_CXX))
+  CMAKE_CXX_COMPILER_ARG1:=$(TARGET_CXX_NOCACHE)
 endif
 
 define Build/Configure/Default