Mailinglist Archive: opensuse-features (263 mails)

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[openFATE 311355] add LDFLAGS=-fuse-linker-plugin to %configure
Feature changed by: Sascha Peilicke (saschpe)
Feature #311355, revision 3
Title: add LDFLAGS=-fuse-linker-plugin to %configure

- Buildservice: Unconfirmed
+ Buildservice: Done
Priority
Requester: Desirable

Requested by: Christopher Yeleighton (yecril71pl)
Partner organization: openSUSE.org

Description:
openSuSE uses GCC as the compiler of choice. The compiler uses a link
editor to build executable objects; the default link editor is called
collect2 and collect2 uses ld to perform the final link. However, the
GCC suite distributes another linker called gold. Gold replaces
collect2. It is enabled by telling gcc to -fuse-linker-plugin; this is
not the default. The default settings for the GNU build system on
openSuSE are provided in an RPM macro called %configure. My suggestion
is to add LDFLAGS=-fuse-linker-plugin to this macro.

Test Case:
== ImageMagick == Try to build ImageMagick using the specification file
from the upstream tarball (version 6.6.7-7). The packager fails because
the PERL extension Magick.so contains an RPATH declaration.
== Qt == Try to build Qt from source in a KDE session with 1 GB
physical RAM. The traditional link editor never halts because it does
not have enough RAM.

Business case (Partner benefit):
openSUSE.org: === RPATH === The traditional link editor ld adds an
RPATH header in ELF executeable objects. Such objects are considered a
security threat by the tool brp-rpath and binary packages containing
them fail to build. The header is injected when the object is linked
against a shared library that is not placed in a standard operating
system directory; this may happen during a package build when a library
and a dependent executable are built together and a library is located
by means of the environment variable $LD_RUN_PATH. The gold link editor
does not have this problem because it is unaffected by the value of
$LD_RUN_PATH.
== EFFICIENCY == The gold link editor performs better and requires less
system resources than the traditional link editor ld.

Discussion:
#1: Marcus Meissner (msmeissn) (2011-05-26 15:03:07)
this is done by gcc 4.6 by default according to richi. So its not
necessary anymore to have it in the buildsystem configured.




--
openSUSE Feature:
https://features.opensuse.org/311355

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