When integrating PDB output in mingw targeting build systems, it
might be a lot of extra work to specify unique file names for
the pdb output. Therefore allow omitting the actual file name
and let it implicitly be the same name as the linker output, with
a pdb extension.

As the current form of the pdb option takes a separate parameter value,
e.g. "-pdb out.pdb", it is impractical to leave out the parameter value.

Therefore, introduce a second syntax for the option, with an equals
sign, like -pdb=out.pdb, where the value easily can be omitted.

The form -pdb= for requesting pdb files with an implicit name should
work fine, even though it looks a bit unconventional in that form.

Differential Revision: https://reviews.llvm.org/D62004

llvm-svn: 361014

GNU ld doesn't have such a flag though, so this is a lld specific
option.

Differential Revision: https://reviews.llvm.org/D60860

llvm-svn: 358759

Differential Revision: https://reviews.llvm.org/D58380

llvm-svn: 354387

Differential Revision: https://reviews.llvm.org/D57808

llvm-svn: 353342

This fixes PR40582.

Patch by Georg Koppen!

Differential Revision: https://reviews.llvm.org/D57679

llvm-svn: 353145

Move them to the same section as the newly added ignored options
without a defined name.

Also move options that actually weren't ignored to the right section.

Differential Revision: https://reviews.llvm.org/D57374

llvm-svn: 352529

GCC can use LLD with -fuse-ld=lld for MinGW these days, but by
default these options are passed to the linker (unless -fno-lto
is passed to the GCC driver).

Differential Revision: https://reviews.llvm.org/D57304

llvm-svn: 352459

to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636

Originally authored by Rui Ueyama.

Differential Revision: https://reviews.llvm.org/D53031

llvm-svn: 350464

This is necessary for handling defaultlib directives embedded in
object files, unless they use an absolute path.

Differential Revision: https://reviews.llvm.org/D53015

llvm-svn: 344123

Differential Revision: https://reviews.llvm.org/D51840

llvm-svn: 341846

In this mode, we retain the symbol table, but skip the actual debug
information.

Differential Revision: https://reviews.llvm.org/D48745

llvm-svn: 335947

Differential Revision: https://reviews.llvm.org/D46872

llvm-svn: 332398

This allows producing pdb debug info. This is an LLD specific option
since GCC and GNU binutils doesn't support the PDB file format.

Differential Revision: https://reviews.llvm.org/D46796

llvm-svn: 332327

llvm-svn: 327562

Currently --start-group=foo is accidentally accepted by the MinGW driver.

Differential Revision: https://reviews.llvm.org/D43836

llvm-svn: 326478

These are required for handling circular dependencies between
static libraries, which is something that lld-link always does without
any extra parameters.

Differential Revision: https://reviews.llvm.org/D43786

llvm-svn: 326172

The COFF linker automatically sets the IMAGE_DLL_CHARACTERISTICS_NO_SEH
when suitable, similarly to link.exe.

Differential Revision: https://reviews.llvm.org/D41275

llvm-svn: 320861

Without this the LLVM_BUILD_LLVM_DYLIB+DLLVM_LINK_LLVM_DYLIB build
break.

Also remove unneeded lldCore from wasm/CMakeLists.txt

Differential Revision: https://reviews.llvm.org/D41194

llvm-svn: 320610

Differential Revision: https://reviews.llvm.org/D41127

llvm-svn: 320526

The linker refuses using -dynamicbase:no on these architectures.

Stop passing -dynamicbase (which just reinforces the lld-link
default) for simplicity.

Differential Revision: https://reviews.llvm.org/D41052

llvm-svn: 320518

LLD already writes a build id if debug info is enabled.

Some projects set --pie-executable to avoid GNU ld bugs about stripping
base relocations from an executable when they actually are used.
Since -fixed:no is the default (and we don't support setting the
-fixed option via the MinGW frontend), we don't need to handle this.

--disable-auto-image-base is ignored just like --enable-auto-image-base
(as we ignore from before).

Differential Revision: https://reviews.llvm.org/D40031

llvm-svn: 318285

GNU ld doesn't seem to support --icf at all, but this was suggested
in D39885, and GNU gold seems to support it.

Differential Revision: https://reviews.llvm.org/D40019

llvm-svn: 318283

Differential Revision: https://reviews.llvm.org/D40018

llvm-svn: 318282

All of these are disabled by default in GNU ld, but enabled by default
in lld.

Disable dynamicbase by default since it potentially could cause
compatibility issues, but just ignore the others since the lld
default should be fine for most concievable cases.

Differential Revision: https://reviews.llvm.org/D40017

llvm-svn: 318281

In GNU ld, this option is only available on i386, not on x86_64
(where it's enabled by default with no option to disable it either).

Differential Revision: https://reviews.llvm.org/D40015

llvm-svn: 318280

Differential Revision: https://reviews.llvm.org/D39541

llvm-svn: 317376

Also move the -mllvm option to the right section of the options
list.

Differential Revision: https://reviews.llvm.org/D39528

llvm-svn: 317302

In GNU ld, this option is enabled by default, but can be set
to reduce some warnings.

For lld, ignore the flag (for now); in case linking still succeeds
everything should be fine, if not, it should be clear to the user
what part failed (possibly requiring adjusting the user project
to not rely on this feature), instead of straight out failing due to
an unknown flag.

Differential Revision: https://reviews.llvm.org/D39330

llvm-svn: 316693

Differential Revision: https://reviews.llvm.org/D39329

llvm-svn: 316692

Previously, the COFF driver would call exit(0) when called
as a library.  Now it takes `ExitEarly` option, and if it
is false, it doesn't exit.  So it is now more library-friendly.

Furthermore, link() calls freeArena() before returning, to
clean up resources.

Based on an Andrew Kelley's patch.

Differential Revision: https://reviews.llvm.org/D39202

llvm-svn: 316370

Differential Revision: https://reviews.llvm.org/D38761

llvm-svn: 315563

Differential Revision: https://reviews.llvm.org/D38828

llvm-svn: 315529

llvm-svn: 314730

GNU ld manual says that multi-letter long option can be prefixed with
either -- or -. Therefore, we should accept not only --subsystem but
also -subsystem, for example.

There is one exception. If an option starts with "o", it should only be
prefixed with -- to avoid ambiguity with -o<filename> option.

Differential Revision: https://reviews.llvm.org/D37825

llvm-svn: 313286

Differential Revision: https://reviews.llvm.org/D37823

llvm-svn: 313285

Arg instances can be claimed. After claimed, its `isClaimed` function
returns true. We do not use that notion in lld, so using NoClaim
versions of functions is just confusing. This patch is to just use
hasArg instead of hasArgNoClaim.

llvm-svn: 313187

There are no alises handled by this switch, but getUnaliasesdOption is
preferred way of doing this. This is also consistent with ELF and COFF.

llvm-svn: 313180

llvm-svn: 313178

This is how the flag is documented in GNU binutils ld; -Bstatic
only applies to -l options after it, until the next -Bdynamic.

Differential Revision: https://reviews.llvm.org/D37794

llvm-svn: 313175