https://llvm.org/bugs/show_bug.cgi?id=31177
Bug ID: 31177
Summary: PowerPC: soft-float commit breaks Linux kernel build
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: PowerPC
Assignee: unassignedb...@nondot.org
Reporter: an...@samba.org
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
The recent patch to enable soft-float support on PPC64 ("[PowerPC] Refactor
soft-float support, and enable PPC64 soft float") has broken Linux kernel
builds.
We want to avoid floating point in the kernel, but certain files want to be
built with vectorisation. One example is arch/powerpc/lib/xor_vmx.c.
The command line on these files contains the somewhat convoluted:
-msoft-float -mno-altivec -mno-vsx -maltivec -mabi=altivec
There are only two files in the kernel that use altivec in C, so perhaps we can
come up with a way to solve this in the kernel.
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