libtool can currently produce 2 warnings:
1. No symbols were in the object file
2. An object file with the same basename was specified multiple times
The first warning here is often harmless and may just mean you have some
translation units with no symbols for the target you're building for.
The second warning can lead to real issues like those mentioned in
https://reviews.llvm.org/D113130 where ODR violations can slip in.
This introduces a new -warnings_as_errors flag that can be used by build
systems that want to verify they never hit these warnings. For example
with bazel the libtool caller first uniques names to make sure the
duplicate base name case is not possible, but if that doesn't work as
expected, having it fail would be preferred.
It's also worth noting that llvm-libtool-darwin works around an issue
that cctools libtool experiences related to debug info and duplicate
basenames, the workaround is described here:
30baa5d2a4/llvm/lib/Object/ArchiveWriter.cpp (L424-L465)
And it avoids this bug:
f0cbbb1c37/DuplicateBasenameIssue
Differential Revision: https://reviews.llvm.org/D118931
Although we moved to Github Issues. The bug report message refers to
Bugzilla still. This patch tries to update these URLs.
Reviewed By: MaskRay, Quuxplusone, jhenderson, libunwind, libc++
Differential Revision: https://reviews.llvm.org/D116351
1. Emit warnings for files without symbols.
2. Add -no_warning_for_no_symbols.
Test plan: make check-all
Differential revision: https://reviews.llvm.org/D95843
Add support for passing in libraries via `-l` and `-L` options to
`llvm-libtool-darwin`.
Reviewed by jhenderson, smeenai
Differential Revision: https://reviews.llvm.org/D85540
Add support for -arch_only option for llvm-libtool-darwin. This diff
also adds support for accepting universal files as input and flattening
them to create the required static library. Supports input universal
files contaning both Mach-O object files or archives.
Differences from cctools' libtool:
- `-arch_only` can be specified multiple times
- archives containing universal files are considered invalid (libtool
allows such archives)
Reviewed by jhenderson, smeenai
Differential Revision: https://reviews.llvm.org/D84770
Add support for `-D` and `-U` options for llvm-libtool-darwin. `-D`
allows for using zero for timestamps and UIDs/GIDs. `-U` allows for
using actual timestamps and UIDs/GIDs.
Reviewed by jhenderson, smeenai
Differential Revision: https://reviews.llvm.org/D84209
Add support for `-filelist` option for llvm-libtool-darwin. `-filelist`
option allows for passing in a file containing a list of filenames.
Reviewed by jhenderson, smeenai
Differential Revision: https://reviews.llvm.org/D84206
Add support for creating static libraries when the input includes only
Mach-O binaries (and not libraries/archives themselves).
Reviewed by alexshap, Ktwu, smeenai, jhenderson, MaskRay, mtrent
Differential Revision: https://reviews.llvm.org/D83002
This diff starts the implementation of llvm-libtool-darwin
(an llvm based replacement of cctool's libtool).
Libtool is used for creating static and dynamic libraries
from a bunch of object files given as input.
Reviewed by alexshap, smeenai, jhenderson, MaskRay
Differential Revision: https://reviews.llvm.org/D82923
