Public bug reported:
The build on ppc64el fails with the following error:
plt.c: In function ‘arch_elf_add_plt_entry’:
plt.c:781:17: error: ‘libsym’ may be used uninitialized in this function
[-Werror=maybe-uninitialized]
781 | free(libsym);
| ^~~~~~~~~~~~
cc1: all warnings being treated as errors
This seems to be happening because our back-port of this upstream patch is
wrong:
commit 7f20cb21a0d021ab3b12d8a5187beb728f339b0f
Author: Thierry Fauck <thie...@linux.vnet.ibm.com>
AuthorDate: Tue May 13 07:48:24 2014 -0400
Commit: Petr Machata <pmach...@gmail.com>
CommitDate: Wed Nov 11 19:08:43 2015 +0100
Support for powerpc64 arch ppc64el
Signed-off-by: Thierry Fauck <thie...@linux.vnet.ibm.com>
Add support for ppc64le proc and ELF ABIv2.
Provides support for irelative and wchar
The original patch leans on a jump to a "fail" label (that is declared near the
beginning of the function and does the following):
free(name);
return PLT_FAIL;
In the 0.7.3 code, however, a different definition of the "fail" label
exists. It is declared later in the function and relies on the libsym
variable being initialized:
free(name);
free(libsym);
return plt_fail;
** Affects: ltrace (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1967518
Title:
ltrace - build on ppc64el fails
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