Hi folks, It turns out that if you try and build GCC 4.9.2 on a Haswell box with --with-arch=native then the build fails because the assembler in RHEL6.7 doesn't understand some of the instructions GCC emits.
Apparently these are supported by binutils-2.25 and I can see that there is a GCC-4.9.2-binutils-2.25.eb present in EB but the toolchains don't use that. Is there any better way of getting any GCC build to use a version with binutils-2.25 other than to copy all the GCC eb's and then edit them to include a dependency on binutils-2.25? We did see --amend/--try-amend with versionsuffix=-binutils-2.25 but instead of adding that onto the GCC-4.9.2.eb when resolving dependencies it seems to just build GCC-4.9.2.eb as GCC-4.9.2-binutils-2.25.eb (but without the newer binutils) which is the opposite of what we're trying to achieve. Shame this only popped up now but the test system I've had to play with was Sandybridge and (unsurprisingly) that was supported fine in RHEL6. All the best, Chris -- Christopher Samuel Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: [email protected] Phone: +61 (0)3 903 55545 http://www.vlsci.org.au/ http://twitter.com/vlsci
