Ping?
http://gcc.gnu.org/ml/gcc-patches/2011-06/msg01368.html
We had a bug report from a customer that the linker was ignoring the
--demangle and --no-demangle options when generating map files.
Moreover, it was failing in a host-dependent way; on Windows hosts,
it was always emitting demangled names in the map file, while on
Linux hosts, it never did. Moreover, on Windows hosts it also
ignored the setting of the COLLECT_NO_DEMANGLE environment variable.
This turns out to be a problem in collect2, or actually, three
problems:
(1) By default, collect2 is configured to filter out --demangle and
--no-demangle from the linker options, and it tries to do demangling
on symbol names in stdout and stderr itself instead. But, it is too
stupid to know about the map file.
(2) Collect2 is trying to set COLLECT_NO_DEMANGLE to disable
demangling in ld, but in a nonportable way that causes it to be
always unset instead on Windows.
(3) If you configure with --with-demangler-in-ld to try to disable
the collect2 demangling, there's another bug that causes it to ignore
any explicit --demangle or --no-demangle options and only pay
attention to whether or not COLLECT_NO_DEMANGLE is set.
The attached patch addresses all three problems:
(1) I've flipped the default to --with-demangler-in-ld=yes. Note
that configure.ac already takes care not to let this percolate
through to collect2 without verifying that the linker is GNU ld and
that it is a version that supports --demangle. Perhaps back in 2004
when this option was first added, the ld demangling support was
deemed too experimental to make it the default, but that's surely not
the case any more. Also, since this has been broken since 2004, I'm
not sure there's much reason to be concerned with backwards
compatibility, here....
(2) I fixed the COLLECT_NO_DEMANGLE environment variable setting
recipe.
(3) I simplified the argument processing for --demangle and
--no-demangle to pass them straight through to the linker when
HAVE_LD_DEMANGLE is defined.
OK to commit?
-Sandra
2011-06-17 Sandra Loosemore <san...@codesourcery.com>
gcc/
* configure.ac (demangler_in_ld): Default to yes.
* configure: Regenerated.
* collect2.c (main): When HAVE_LD_DEMANGLE is defined, don't
mess with COLLECT_NO_DEMANGLE, and just pass --demangle and
--no-demangle options straight through to ld. When
HAVE_LD_DEMANGLE is not defined, set COLLECT_NO_DEMANGLE in a
way that has the intended effect on Windows.
