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Fix GCC 8 build on macOS bigsur %apple-clang@12.0.5 (#28795)

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* gcc: revise patch range on darwin

* gcc: add conflict to work around bootstrap failure

closes #23296 . See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100340
.

```
Comparing stages 2 and 3
Bootstrap comparison failure!
gcc/tree-ssa-operands.o differs
gcc/tree-ssanames.o differs
gcc/ipa-inline.o differs
gcc/tree-ssa-pre.o differs
gcc/gimple-loop-interchange.o differs
...
```
639 total differences.

* gcc: bump conflict up to correct later version
This commit is contained in:
Seth R. Johnson 2022-02-06 07:48:16 -05:00 committed by GitHub
parent d82dcd35b3
commit 6e36c71d68
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1 changed files with 8 additions and 2 deletions
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10
var/spack/repos/builtin/packages/gcc/package.py
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@ -226,8 +226,14 @@ class Gcc(AutotoolsPackage, GNUMirrorPackage):
# Binutils can't build ld on macOS
conflicts('+binutils', when='platform=darwin')
# Bootstrap comparison failure:
# see https://github.com/spack/spack/issues/23296
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100340
# on XCode 12.5
conflicts('+bootstrap', when='@:11.1 %apple-clang@12.0.5')
# aarch64/M1 is supported in GCC 12+
conflicts('@:11.99', when='target=aarch64: platform=darwin',
conflicts('@:11', when='target=aarch64: platform=darwin',
msg='Only GCC 12 and newer support macOS M1 (aarch64)')
# Newer binutils than RHEL's is required to run `as` on some instructions
@ -252,7 +258,7 @@ class Gcc(AutotoolsPackage, GNUMirrorPackage):
# https://github.com/Homebrew/homebrew-core/pull/39041
patch('https://raw.githubusercontent.com/Homebrew/formula-patches/master/gcc/8.3.0-xcode-bug-_Atomic-fix.patch',
sha256='33ee92bf678586357ee8ab9d2faddf807e671ad37b97afdd102d5d153d03ca84',
when='@6:8')
when='@6:8.3')
if macos_version() >= Version('10.15'):
# Fix system headers for Catalina SDK
# (otherwise __OSX_AVAILABLE_STARTING ends up undefined)