http://llvm.org/bugs/show_bug.cgi?id=6978
Summary: lit should not unset CCACHE_DIR
Product: Test Suite
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: lit
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
The gcc that I have in my path is the one provided by ccache. To work properly,
CCACHE_DIR needs to be set or else ccache will try to use $HOME/.ccache as its
cache location.
When, from inside tools/clang/test, I run
CCACHE_DIR=/var/tmp/ccache \
PATH=/usr/libexec/ccache/:$PATH \
../../../utils/lit/lit.py Driver
the variable CCACHE_DIR ends up unset for some reason, causing
tools/clang/test/Driver/Output/hello.c.tmp.log
to contain
"/usr/libexec/ccache/gcc" -c -m64 -o /tmp/cc-lRfkeD.o -x assembler
/tmp/cc-wRxkGW.s
ccache: failed to create [..]/.ccache (Permission denied)
if $HOME/.ccache is not writable (which with automated building, a dedicated
user account and proper sandboxing will be the case), causing the test to fail.
In such a scenario, not adding ccache's gcc wrapper to the PATH isn't a
feasible solution (because it's usually added globally). Instead, ccache is
usually disabled by setting CCACHE_DISABLE. Again, this variable does not get
through, so this doesn't work either.
Does lit.py need to strip CCACHE_* from the environment? If not, could it be
made not to?
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