build: improve ccache support

[openwrt/openwrt.git] / include / host-build.mk

diff --git a/include/host-build.mk b/include/host-build.mk
index 9fc14241c64b69bd3a3a4ad39ca1c301b01139a4..7d84ab0f5fc443dedc103d80928a13a09f0f7199 100644 (file)
--- a/include/host-build.mk
+++ b/include/host-build.mk
@@ -132,7 +132,9 @@ define Host/Exports/Default
   $(1) : export STAGING_PREFIX=$$(HOST_BUILD_PREFIX)
   $(1) : export PKG_CONFIG_PATH=$$(STAGING_DIR_HOST)/lib/pkgconfig:$$(HOST_BUILD_PREFIX)/lib/pkgconfig
   $(1) : export PKG_CONFIG_LIBDIR=$$(HOST_BUILD_PREFIX)/lib/pkgconfig
-  $(if $(CONFIG_CCACHE),$(1) : export CCACHE_DIR:=$(STAGING_DIR_HOST)/ccache)
+  $(if $(CONFIG_CCACHE),$(1) : export CCACHE_BASEDIR:=$(TOPDIR))
+  $(if $(CONFIG_CCACHE),$(1) : export CCACHE_DIR:=$(if $(call qstrip,$(CONFIG_CCACHE_DIR)),$(call qstrip,$(CONFIG_CCACHE_DIR)),$(TOPDIR)/.ccache))
+  $(if $(CONFIG_CCACHE),$(1) : export CCACHE_COMPILERCHECK:=%compiler% -dumpmachine; %compiler% -dumpversion)
   $(if $(HOST_CONFIG_SITE),$(1) : export CONFIG_SITE:=$(HOST_CONFIG_SITE))
   $(if $(IS_PACKAGE_BUILD),$(1) : export PATH=$$(TARGET_PATH_PKG))
 endef