[Bug testsuite/31780] New: [gdb/testsuite] object files overwritten in gdb.base/ctxobj.exp

["vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=31780

            Bug ID: 31780
           Summary: [gdb/testsuite] object files overwritten in
                    gdb.base/ctxobj.exp
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: testsuite
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

I ran test-case gdb.base/ctxobj.exp with the fission target board, and ran into
trouble.

The problem is that there are two shared libraries, build from the same
sources, but with different defines.

The compilation of the second shared library overwrites the object files of the
first library.

AFAIK, this is considered bad testsuite style, because we want to be able to
find back all artifacts after running a test-case, but it doesn't affect the
running of the test-case.

However, in the fission case this also overwrites the .dwo files of the first
shared library, effectively throwing away the debug info of the first shared
library, which does cause trouble.

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