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[binutils-gdb] testsuite: Disable ccache
- From: sergiodj+buildbot at sergiodj dot net
- To: gdb-testers at sourceware dot org
- Date: Thu, 15 Sep 2016 08:25:06 -0400
- Subject: [binutils-gdb] testsuite: Disable ccache
- Authentication-results: sourceware.org; auth=none
*** TEST RESULTS FOR COMMIT 49b4de64242d4ae035e0e2197837278e33c187fc ***
Author: Jan Kratochvil <jan.kratochvil@redhat.com>
Branch: master
Commit: 49b4de64242d4ae035e0e2197837278e33c187fc
testsuite: Disable ccache
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.
gdb/testsuite/ChangeLog
2016-09-15 Jan Kratochvil <jan.kratochvil@redhat.com>
* lib/future.exp: Set CCACHE_DISABLE, clear CCACHE_NODISABLE.
- Follow-Ups:
- Failures on Fedora-x86_64-native-gdbserver-m32, branch master
- Failures on Debian-i686, branch master
- Failures on Debian-s390x-native-gdbserver-m64, branch master
- Failures on Fedora-i686, branch master
- Failures on Fedora-x86_64-native-extended-gdbserver-m64, branch master
- Failures on Fedora-x86_64-native-gdbserver-m64, branch master
- Failures on Fedora-ppc64be-native-gdbserver-m64, branch master
- Failures on Ubuntu-AArch64-native-gdbserver-m64, branch master
- Failures on Debian-x86_64-native-extended-gdbserver-m64, branch master
- Failures on Debian-s390x-native-extended-gdbserver-m64, branch master
- Failures on Debian-i686-native-extended-gdbserver, branch master
- Failures on Fedora-ppc64le-native-extended-gdbserver-m64, branch master
- Failures on Fedora-ppc64be-native-extended-gdbserver-m64, branch master
- Failures on Fedora-ppc64le-native-gdbserver-m64, branch master