cmake.mk,rules.mk: fix host builds using CMake and ccache

Commit f98878e4 ("cmake.mk: set C/CXX compiler for host builds as
well") has introduced regression as it didn't taken usage of ccache into
the account so fix it by handling ccache use cases as well.

In order to get this working we need to export HOSTCXX_NOCACHE in
rules.mk as well.

Fixes: f98878e4 ("cmake.mk: set C/CXX compiler for host builds as well")
Reported-by: Ansuel Smith <ansuelsmth@gmail.com>
Tested-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>

include/cmake.mk

@@ -23,12 +23,22 @@ ifeq ($(CONFIG_CCACHE),)
  CMAKE_CXX_COMPILER:=$(call cmake_tool,$(TARGET_CXX))
  CMAKE_C_COMPILER_ARG1:=
  CMAKE_CXX_COMPILER_ARG1:=
+
+ CMAKE_HOST_C_COMPILER:=$(HOSTCC)
+ CMAKE_HOST_CXX_COMPILER:=$(HOSTCXX)
+ CMAKE_HOST_C_COMPILER_ARG1:=
+ CMAKE_HOST_CXX_COMPILER_ARG1:=
 else
   CCACHE:=$(STAGING_DIR_HOST)/bin/ccache
   CMAKE_C_COMPILER:=$(CCACHE)
   CMAKE_C_COMPILER_ARG1:=$(TARGET_CC_NOCACHE)
   CMAKE_CXX_COMPILER:=$(CCACHE)
   CMAKE_CXX_COMPILER_ARG1:=$(TARGET_CXX_NOCACHE)
+
+  CMAKE_HOST_C_COMPILER:=$(CCACHE)
+  CMAKE_HOST_C_COMPILER_ARG1:=$(HOSTCC_NOCACHE)
+  CMAKE_HOST_CXX_COMPILER:=$(CCACHE)
+  CMAKE_HOST_CXX_COMPILER_ARG1:=$(HOSTCXX_NOCACHE)
 endif
 CMAKE_AR:=$(call cmake_tool,$(TARGET_AR))
 CMAKE_NM:=$(call cmake_tool,$(TARGET_NM))
@@ -97,8 +107,12 @@ define Host/Configure/Default
 		LDFLAGS="$(HOST_LDFLAGS)" \
 		cmake \
 			-DCMAKE_BUILD_TYPE=Release \
-			-DCMAKE_C_COMPILER="$(HOSTCC)" \
-			-DCMAKE_CXX_COMPILER="$(HOSTCXX)" \
+			-DCMAKE_C_COMPILER="$(CMAKE_HOST_C_COMPILER)" \
+			-DCMAKE_C_COMPILER_ARG1="$(CMAKE_HOST_C_COMPILER_ARG1)" \
+			-DCMAKE_CXX_COMPILER="$(CMAKE_HOST_CXX_COMPILER)" \
+			-DCMAKE_CXX_COMPILER_ARG1="$(CMAKE_HOST_CXX_COMPILER_ARG1)" \
+			-DCMAKE_ASM_COMPILER="$(CMAKE_HOST_C_COMPILER)" \
+			-DCMAKE_ASM_COMPILER_ARG1="$(CMAKE_HOST_C_COMPILER_ARG1)" \
 			-DCMAKE_C_FLAGS_RELEASE="-DNDEBUG" \
 			-DCMAKE_CXX_FLAGS_RELEASE="-DNDEBUG" \
 			-DCMAKE_EXE_LINKER_FLAGS:STRING="$(HOST_LDFLAGS)" \

rules.mk

@@ -292,6 +292,7 @@ HOSTCXX_NOCACHE:=$(HOSTCXX)
 export TARGET_CC_NOCACHE
 export TARGET_CXX_NOCACHE
 export HOSTCC_NOCACHE
+export HOSTCXX_NOCACHE
 
 ifneq ($(CONFIG_CCACHE),)
   TARGET_CC:= ccache_cc