* rename `entry` to `entry_symbol_name` for the zig build API
* integrate with `zig cc` command line options
* integrate with COFF linking with LLD
* integrate with self-hosted ELF linker
* don't put it in the hash for MachO since it is ignored
Prior to this change, even if the use specified the sysroot on the
compiler line like so
```
zig cc --sysroot=/path/to/sdk
```
it would only be used as a prefix to include paths and not as a prefix
for `zig ld` linker.
* stage1 backend allows configuring the uwtables function attr
via a flag rather than its own logic.
* stage2 defaults to enabling uwtable attr when
linking libunwind, or always on windows
* stage2 makes link_eh_frame_hdr true automatically if uwtable
attr is set to be on for zig functions
* CLI: add -funwind-tables and -fno-unwind-tables to allow the user to
override the defaults.
* hook it up to `zig cc`
closes#9046
- hash/eql functions moved into a Context object
- *Context functions pass an explicit context
- *Adapted functions pass specialized keys and contexts
- new getPtr() function returns a pointer to value
- remove functions renamed to fetchRemove
- new remove functions return bool
- removeAssertDiscard deleted, use assert(remove(...)) instead
- Keys and values are stored in separate arrays
- Entry is now {*K, *V}, the new KV is {K, V}
- BufSet/BufMap functions renamed to match other set/map types
- fixed iterating-while-modifying bug in src/link/C.zig
fix drivers: zig {cc,c++}
- `-dynamiclib` is an alias to `-shared`
- associate `-dynamiclib` with zig `.shared` semantics
fix drivers: zig {cc,c++,build-lib,build-exe}
- use `-dynamic` for {exe,dylib}
- for dylib this fixes a regression
- for exe this replaces incorrect use of `-static`
Clang docs say:
> Like -MMD, but also implies -E and writes to stdout by default.
Previously, Zig handled this option by forwarding it directly to Clang,
and disabling depfiles. However this did not adhere to Clang's documented
behavior of these flags.
Now, in addition to being forwarded directly to Clang, `-MM` also
sets c_out_mode = .preprocessor, just like `-E`.
Another issue I noticed is that Zig did not recognize the aliases for
-MG, -MM, or -MMD. The aliases are now recognized.
The CLI gains -flto and -fno-lto options to override the default.
However, the cool thing about this is that the defaults are great! In
general when you use build-exe in release mode, Zig will enable LTO if
it would work and it would help.
zig cc supports detecting and honoring the -flto and -fno-lto flags as
well. The linkWithLld functions are improved to all be the same with
regards to copying the artifact instead of trying to pass single objects
through LLD with -r. There is possibly a future improvement here as
well; see the respective TODOs.
stage1 is updated to support outputting LLVM bitcode instead of machine
code when lto is enabled. This allows LLVM to optimize across the Zig and
C/C++ code boundary.
closes#2845
* CLI: change to -mred-zone and -mno-red-zone to match gcc/clang.
* build.zig: remove the double negative and make it an optional bool.
This follows precedent from other flags, allowing the compiler CLI to
be the decider of what is default instead of duplicating the default
value into the build system code.
* Compilation: make it an optional `want_red_zone` instead of a
`no_red_zone` bool. The default is decided by a call to
`target_util.hasRedZone`.
* When creating a Clang command line, put -mred-zone on the command
line if we are forcing it to be enabled.
* Update update_clang_options.zig with respect to the recent {s}/{} format changes.
* `zig cc` integration with red zone preference.
* stage2: Make zig cc more verbose
Make `zig cc` print more info from Clang itself and from our own linker
invocation, this is needed for CMake to properly discover all the
include directories and library search paths.
Closes#7110
* Update `update_clang_options`
* Typo fixes
Co-authored-by: Jakub Konka <kubkon@jakubkonka.com>
This cleans up how the CLI parses and handles -E, -S, and -c.
Compilation explicitly acknowledges when it is being used to do C
preprocessing.
-S is properly translated to -fno-emit-bin -femit-asm but Compilation
does not yet handle -femit-asm.
There is not yet a mechanism for skipping the linking step when there is
only a single object file, and so to make this work we have to do a file
copy in link.flush() to copy the file from zig-cache into the output
directory.
In an MSVC context, `-MT` means
"Use static run-time"
and it is a flag with no parameter.
On POSIX it means
"Specify name of main file output in depfile"
and it is "joined or separate".
The former was interfering with the latter. Now, the MT flag is required
to be specified with a `/` to disambiguate: `/MT`.
This caused link errors in c++ code because it was not correct to pass
these flags to child codegens. And that was the only reason to detect
these flags. Otherwise we can safely rely on non-explicitly-detected
flag forwarding.
This is only the first step; it makes zig cc recognize -z and append it to the linker args, but the linker arg parsing doesn't support -z yet so it will just give the warning 'unsupported linker arg: -z'
* The generated options data file is sorted now in a way that
makes sure longer prefixes are first. This prevents collisions
with some parameters.
* Add support for `-fPIC`, `-fno-PIC`, `-nostdlib`, `-shared`,
`-rdynamic`, `-Wl,-soname`, `-Wl,-rpath`
* Better support for `-o`.
* Disable generating h files
* Shared library support.
* Better positional argument support.
