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| author | Arnout Vandecappelle <arnout@mind.be> | 2015-10-04 16:25:32 +0100 |
|---|---|---|
| committer | Peter Korsgaard <peter@korsgaard.com> | 2015-10-04 18:22:21 +0200 |
| commit | 1e97b2787331c5f4452d8c9a76961a89ec355d9d (patch) | |
| tree | 3650a31a1a9b2fa3b9955823839057fa7b91ac89 /package/gcc | |
| parent | f4682cf933a3e0e1017aa8827a8c57fdd79e30f3 (diff) | |
| download | buildroot-1e97b2787331c5f4452d8c9a76961a89ec355d9d.tar.gz buildroot-1e97b2787331c5f4452d8c9a76961a89ec355d9d.zip | |
ccache: support changing the output directory
When building in a different output directory than the original build,
there will currently be a lot of ccache misses because in many cases
there is some -I/... absolute path in the compilation. Ccache has an
option CCACHE_BASEDIR to substitute absolute paths with relative paths,
so they wil be the same in the hash (and in the output).
Since there are some disadvantages to this path rewriting, it is made
optional as BR2_CCACHE_USE_BASEDIR. It defaults to y because the
usefulness of ccache is severely reduced without this option.
In addition to CCACHE_BASEDIR, we also substitute away the occurences
of $(HOST_DIR) in the calculation of the compiler hash. This is done
regardless of the setting of BR2_CCACHE_USE_BASEDIR because it's
quite harmless.
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Diffstat (limited to 'package/gcc')
| -rw-r--r-- | package/gcc/gcc.mk | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/package/gcc/gcc.mk b/package/gcc/gcc.mk index 103cbe17b7..420c4e9b7c 100644 --- a/package/gcc/gcc.mk +++ b/package/gcc/gcc.mk @@ -256,8 +256,10 @@ HOST_GCC_COMMON_CCACHE_HASH_FILES += package/gcc/$(GCC_VERSION)/1000-powerpc-lin endif endif +# _CONF_OPTS contains some references to the absolute path of $(HOST_DIR), +# so substitute those away. HOST_GCC_COMMON_TOOLCHAIN_WRAPPER_ARGS += -DBR_CCACHE_HASH=\"`\ - printf '%s' $($(PKG)_CONF_OPTS) $(GCC_VERSION) \ + printf '%s' $(subst $(HOST_DIR),@HOST_DIR@,$($(PKG)_CONF_OPTS)) \ | sha256sum - $(HOST_GCC_COMMON_CCACHE_HASH_FILES) \ | cut -c -64 | tr -d '\n'`\" endif # BR2_CCACHE |
