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Fix gdb.trace testcase build failures with Clang

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25 gdb.trace tests failed to build on x86 with Clang because the
x86_trace_dummy function is optimized out, causing the builds to
fail with variations on the following error:

  gdb compile failed, /usr/bin/ld:
    /gdbtest/build/gdb/testsuite/outputs/gdb.trace/backtrace/backtrace0.o:
    in function `main':
    /gdbtest/src/gdb/testsuite/gdb.trace/actions.c:146: undefined
    reference to `x86_trace_dummy'
    clang-12: error: linker command failed with exit code 1

This commit adds __attribute__ ((used)) to x86_trace_dummy to prevent
this.

gdb/testsuite/ChangeLog:

	* gdb.trace/trace-common.h (x86_trace_dummy): Add
	__attribute__ ((used)).
This commit is contained in:
Gary Benson 2020-11-17 14:52:49 +00:00
parent 0833984dda
commit 811bdca093
2 changed files with 6 additions and 1 deletions
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5
gdb/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2020-11-17 Gary Benson <gbenson@redhat.com>
* gdb.trace/trace-common.h (x86_trace_dummy): Add
__attribute__ ((used)).
2020-11-17 Andrew Burgess <andrew.burgess@embecosm.com>
* gdb.gdb/unittest.exp: Spot 'Running...' lines.

2
gdb/testsuite/gdb.trace/trace-common.h
View file

@ -30,7 +30,7 @@
#if (defined __x86_64__ || defined __i386__)
static void
static void __attribute__ ((used))
x86_trace_dummy ()
{
int x = 0;