dejagnu: Disable ccache
Jan Kratochvil <[email protected]>
| Newsgroups | gmane.comp.sysutils.dejagnu.general,gmane.comp.gdb.patches |
|---|---|
| Message-ID | <[email protected]> |
Hi, there were always various problems with compatibility with ccache: https://bugzilla.redhat.com/show_bug.cgi?id=488863 https://bugzilla.redhat.com/show_bug.cgi?id=759592 https://sourceware.org/ml/gdb-patches/2009-02/msg00397.html IMO in a summary ccache finds more a benefit of faster compilation despite the debug info is no longer exactly the same (as without ccache). Although for example in this case ccache helped to find a real GDB bug: https://sourceware.org/ml/gdb-patches/2015-01/msg00497.html For the GDB testcases ccache has (IMO) no real performance advantage and it just brings heisenbugs - false FAILs - from time to time: Breakpoint 1, main () at gdb/testsuite/gdb.base/vdso-warning.c:21^M 21 return 0;^M (gdb) PASS: gdb.base/vdso-warning.exp: run: startup -> Breakpoint 1, main () at gdb/testsuite/gdb.base/hbreak-unmapped.c:21^M 21 return 0;^M (gdb) FAIL: gdb.base/vdso-warning.exp: run: startup So I find most safe and easy to just disable ccache for all testsuites. I guess this issues can be considered more general than just for the GDB testsuite, therefore posting it for dejagnu. Jan _______________________________________________ DejaGnu mailing list [email protected] https://lists.gnu.org/mailman/listinfo/dejagnu
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diff --git a/ChangeLog b/ChangeLog index 4880003..916fa04 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,7 @@ +2016-09-04 Jan Kratochvil <[email protected]> + + * runtest.exp: Set CCACHE_DISABLE, clear CCACHE_NODISABLE. + 2016-06-28 Ben Elliston <[email protected]> * aclocal.m4, Makefile.in: Regenerate with automake 1.15. diff --git a/runtest.exp b/runtest.exp index 2c6ca5d..0415e4e 100644 --- a/runtest.exp +++ b/runtest.exp @@ -87,6 +87,11 @@ set target_cpu "" ;# type of the cpu tests are running on set target_alias "" ;# standard abbreviation of target set compiler_flags "" ;# the flags used by the compiler +# Various ccache versions provide incorrect debug info such as ignoring +# different current directory, breaking GDB testsuite. +set env(CCACHE_DISABLE) 1 +unset -nocomplain env(CCACHE_NODISABLE) + # # some convenience abbreviations #