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lld: make -v behave similarly to GNU ld.bfd

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Previously, lld exited with an error status if the only option given to
the command was -v. GNU linkers gracefully exit in that case. This patch
makes lld behave like GNU.

Note that even with this patch, lld's -v and --version options behave
slightly differently than GNU linkers' counterparts. For example,
if you run ld.bfd -v -v, the version string is printed out twice.
But that is an edge case that I don't think we need to take care of.

Fixes https://bugs.llvm.org/show_bug.cgi?id=31582

Obtained from:	LLVM r319717
MFC after:	1 week
This commit is contained in:
Ed Maste 2017-12-05 01:47:41 +00:00
parent b07bc39a23
commit a6aca65caf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=326547
1 changed files with 4 additions and 3 deletions
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7
contrib/llvm/tools/lld/ELF/Driver.cpp
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@ -345,9 +345,10 @@ void LinkerDriver::main(ArrayRef<const char *> ArgsArr, bool CanExitEarly) {
if (Args.hasArg(OPT_v) || Args.hasArg(OPT_version))
message(getLLDVersion() + " (compatible with GNU linkers)");
// ld.bfd always exits after printing out the version string.
// ld.gold proceeds if a given option is -v. Because gold's behavior
// is more permissive than ld.bfd, we chose what gold does here.
// The behavior of -v or --version is a bit strange, but this is
// needed for compatibility with GNU linkers.
if (Args.hasArg(OPT_v) && !Args.hasArg(OPT_INPUT))
return;
if (Args.hasArg(OPT_version))
return;