#12703: GLPK fails to build with LTO (`gcc -flto ...`)
-------------------------------------------------+-------------------------
Reporter: leif | Owner: leif
Type: defect | Status:
Priority: minor | needs_review
Component: packages: standard | Milestone: sage-6.4
Keywords: link time optimization nm | Resolution:
glpsol spkg upgrade update | Merged in:
Authors: Leif Leonhardy | Reviewers: Nathann
Report Upstream: Reported upstream. Developers | Cohen
acknowledge bug. | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by jpflori):
Replying to [comment:47 leif]:
> Replying to [comment:44 jpflori]:
> > I you just wanted to point out that building with `CFLAGS=-flto`
should work, then something very fishy is going on...
>
> Yep, `CFLAGS=-flto` should work, provided your compiler and linker
support it (binutils at least >=2.22 should, GCC needs to be configured
accordingly -- AFAIK Sage's isn't).
What should I look for in `gcc -v`?
My debian's one spits:
{{{
% gcc -v
~/glpk/src
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.9/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.9.1-19'
--with-bugurl=file:///usr/share/doc/gcc-4.9/README.Bugs --enable-
languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-
suffix=-4.9 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --with-gxx-include-
dir=/usr/include/c++/4.9 --libdir=/usr/lib --enable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--enable-gnu-unique-object --disable-vtable-verify --enable-plugin --with-
system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-
cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64/jre --enable-
java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-amd64 --with-
arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --with-arch-32=i586 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 4.9.1 (Debian 4.9.1-19)
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/12703#comment:48>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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