Am 2017-07-18 16:32, schrieb John David Anglin:
On 2017-07-17 12:33 PM, John David Anglin wrote:
I would like to know if the gentoo folks would consider fixing the
__gmon_start__ bug:
https://sourceware.org/bugzilla/show_bug.cgi?id=19170
There is some risk in applying the patch as rebuilding a library
package may break other
packages which depend on the library. This could break critical tools
such as binutils and
gcc. In which case, some manual intervention may be needed. However,
the transition
on Debian went fairly smoothly. As a result, we no longer have the
external symbol
__gmon_start exposed and we have correct library dependencies.
The issues with _init referred to in the BZ report are fixed. It is
now PIC; and PIE applications
work on hppa thanks to Alan Modra.
Helge: we need to add PIE load address to the kernel TODO list if it's
not already there.
Although not ideal, we could keep the __gmon_start__ patch in Debian.
The other approach is to install the __gmon_start__ patch and let
gentoo revert it. I'm starting
to think this is best.
I don't think there will be a big problem for Gentoo to accept it, as
long as there is a working upgrade path like "build glibc with flag
-special-foo, rebuild system, remove flag and rebuild glibc again". And
of course a hint in the release notes so it will be obvious to the
packagers what they have to take care of. That flag thing is something
that Gentoo probably can add to their build scripts, something that e.g.
keeps the symbol in the lib without exporting it during linking, so it
would be resolvable first and the reference goes away on rebuild. Or
whatever ;)
Eike
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