433290761f
The existing ccache infrastructure sets the cache directory hardcoded in the ccache binary. As this directory was set to ~/.buildroot-ccache, the cache is not necessarily local (e.g. in corporate environments the home directories may be mounted over NFS.) Previous versions of buildroot did allow to set the cache directory, but this was also hardcoded (so you had to rebuild ccache to change it), plus that support was removed. See http://lists.busybox.net/pipermail/buildroot/2011-July/044511.html for a discussion on this. This patch modifies ccache to respect a new shell variable (exported from the Makefile, based on a configuration option) instead of CCACHE_DIR. The name CCACHE_DIR itself is already used by autotargets for the ccache package. Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
53 lines
2.0 KiB
Makefile
53 lines
2.0 KiB
Makefile
#############################################################
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#
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# ccache
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#
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#############################################################
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CCACHE_VERSION = 3.1.7
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CCACHE_SITE = http://samba.org/ftp/ccache
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CCACHE_SOURCE = ccache-$(CCACHE_VERSION).tar.bz2
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# When ccache is being built for the host, ccache is not yet
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# available, so we have to use the special C compiler without the
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# cache.
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HOST_CCACHE_CONF_ENV = \
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CC="$(HOSTCC_NOCCACHE)"
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# Force ccache to use its internal zlib. The problem is that without
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# this, ccache would link against the zlib of the build system, but we
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# might build and install a different version of zlib in $(O)/host
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# afterwards, which ccache will pick up. This might break if there is
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# a version mismatch. A solution would be to add host-zlib has a
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# dependency of ccache, but it would require tuning the zlib .mk file
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# to use HOSTCC_NOCCACHE as the compiler. Instead, we take the easy
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# path: tell ccache to use its internal copy of zlib, so that ccache
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# has zero dependency besides the C library.
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HOST_CCACHE_CONF_OPT += ccache_cv_zlib_1_2_3=no
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# Patch host-ccache as follows:
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# - Use BUILDROOT_CACHE_DIR instead of CCACHE_DIR, because CCACHE_DIR
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# is already used by autotargets for the ccache package.
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# BUILDROOT_CACHE_DIR is exported by Makefile based on config option
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# BR2_CCACHE_DIR.
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# - ccache shouldn't use the compiler binary mtime to detect a change in
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# the compiler, because in the context of Buildroot, that completely
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# defeats the purpose of ccache. Of course, that leaves the user
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# responsible for purging its cache when the compiler changes.
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define HOST_CCACHE_PATCH_CONFIGURATION
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sed -i 's,getenv("CCACHE_DIR"),getenv("BUILDROOT_CACHE_DIR"),' $(@D)/ccache.c
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sed -i 's,getenv("CCACHE_COMPILERCHECK"),"none",' $(@D)/ccache.c
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endef
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HOST_CCACHE_POST_CONFIGURE_HOOKS += \
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HOST_CCACHE_PATCH_CONFIGURATION
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$(eval $(call AUTOTARGETS))
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$(eval $(call AUTOTARGETS,host))
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ifeq ($(BR2_CCACHE),y)
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ccache-stats: host-ccache
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$(Q)$(CCACHE) -s
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endif
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