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gcc: Ensure matching assembler/binutils on RHEL8 (#33994)

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gcc@10: Newer binutils than RHEL7/8's are required to for guaranteed operaton. Therefore, on RHEL7/8, reject ~binutils. You need to add +binutils to be sure to have binutils which are recent enough.

See this discussion with the OpenBLAS devs for reference:
https://github.com/xianyi/OpenBLAS/issues/3805#issuecomment-1319878852

Co-authored-by: Bernhard Kaindl <contact@bernhard.kaindl.dev>
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Bernhard Kaindl 2022-11-18 19:55:52 +01:00 committed by GitHub
parent 778dddc523
commit c601bdf7bf
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var/spack/repos/builtin/packages/gcc/package.py
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@ -342,6 +342,14 @@ class Gcc(AutotoolsPackage, GNUMirrorPackage):
# Newer binutils than RHEL's is required to run `as` on some instructions
# generated by new GCC (see https://github.com/spack/spack/issues/12235)
conflicts("~binutils", when="@7: os=rhel6", msg="New GCC cannot use system assembler on RHEL6")
# Ditto for RHEL7/8: OpenBLAS uses flags which the RHEL system-binutils don't have:
# https://github.com/xianyi/OpenBLAS/issues/3805#issuecomment-1319878852
conflicts(
"~binutils", when="@10: os=rhel7", msg="gcc: Add +binutils - preinstalled as might be old"
)
conflicts(
"~binutils", when="@10: os=rhel8", msg="gcc: Add +binutils - preinstalled as might be old"
)
# GCC 11 requires GCC 4.8 or later (https://gcc.gnu.org/gcc-11/changes.html)
conflicts("%gcc@:4.7", when="@11:")