I just burned 2 days debugging a confusing interaction between ccache
and the -fsanitize-blacklist argument to Clang. Let's see if we can
live without ccache (swarming affinity + Ninja seems pretty decent).
As a point of reference, the Mac bots have been looking for ccache but
failing to find it. They're proof this will be fine.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2310063003
Review-Url: https://codereview.chromium.org/2310063003
I am hoping this makes it easier to get *SAN bots going.
Today we're generating a libcompiler_rt.a that's using a
relocation type that the ld on the bots doesn't know about.
This lld is will know about anything our Clang generates.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2301273002
Review-Url: https://codereview.chromium.org/2301273002
This makes it considerably easier to use ccache with the Android NDK.
You can now just set
compiler_prefix = "ccache"
ndk = "/path/to/ndk"
and we'll use the NDK clang, wrapped with ccache.
The name compiler_prefix is stolen from / compatible with Chrome.
If you have ccache, you can just always leave compiler_prefix="ccache" enabled.
This should make it an unusual thing for humans to have to change cc or cxx.
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2281163002
Review-Url: https://codereview.chromium.org/2281163002
Adding flags to the end of cc or cxx is pretty useful, but these always end up
on the command line before the GN generated flags, thus setting defaults that
GN will override.
For full flexibility we want to be able to add flags after the flags GN has
added, so that custom flags can override _it_.
I've updated the Fast bots with an example here: if we said cc="clang -O3 ...",
that '-O3' would be overriden later by the default Release-mode '-Os'. By
putting it in extra_cflags, we get the last word: our '-O3' overrides the
default '-Os'.
Another good use case is a hypothetical Actually-Shippable-Release mode. Our
Release mode bundles in tons of debug symbols via '-g'. libskia.a is about 10x
larger than it needs to be when built that way, but it helps us debug the bot
failures immensely. To build a libskia.{a,so} that you'd really ship, you can
now set extra_cflags="-g0" to override '-g'. You could set '-march' flags there
too, '-fomit-frame-pointer', etc.
There are lots of flags that won't matter where they end up in the command line.
To keep everything simple I've put them in extra_cflags with the rest. This means
the only time we change 'cc' or 'cxx' in our recipes is to prefix 'ccache'.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2241263003
Review-Url: https://codereview.chromium.org/2241263003
As an experiment, instead of replacing these with -GN twins, take
them over in-place. This should take over:
-FAST
-SKFOO
CQ_INCLUDE_TRYBOTS=master.client.skia:Perf-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE-Trybot,Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE-Trybot,Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot,Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-Fast-Trybot
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2229463002
Review-Url: https://codereview.chromium.org/2229463002
