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Reapply r362235 (by kp):

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llvm: Default to -mno-relax on RISC-V

Compiling on a RISC-V system fails with 'relocation R_RISCV_ALIGN
requires unimplemented linker relaxation; recompile with -mno-relax'.

Our default linker (ld.lld) doesn't support relaxation, so default to
no-relax so we don't generate object files the linker can't handle.

Reviewed by:	mhorne
Sponsored by:	Axiado
Differential Revision:	https://reviews.freebsd.org/D25210
This commit is contained in:
Dimitry Andric 2020-08-06 19:24:17 +00:00
parent ec280e9ec4
commit 82343267e3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/projects/clang1100-import/; revision=363981
1 changed files with 3 additions and 2 deletions
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5
contrib/llvm-project/clang/lib/Driver/ToolChains/Arch/RISCV.cpp
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@ -536,8 +536,9 @@ void riscv::getRISCVTargetFeatures(const Driver &D, const llvm::Triple &Triple,
if (Args.hasArg(options::OPT_ffixed_x31))
Features.push_back("+reserve-x31");
// -mrelax is default, unless -mno-relax is specified.
if (Args.hasFlag(options::OPT_mrelax, options::OPT_mno_relax, true))
// FreeBSD local, because ld.lld doesn't support relaxations
// -mno-relax is default, unless -mrelax is specified.
if (Args.hasFlag(options::OPT_mrelax, options::OPT_mno_relax, false))
Features.push_back("+relax");
else
Features.push_back("-relax");