The Meson Build System
http://mesonbuild.com/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
252 lines
9.2 KiB
252 lines
9.2 KiB
--- |
|
title: Release 0.52.0 |
|
short-description: Release notes for 0.52.0 |
|
... |
|
|
|
# New features |
|
|
|
## Gettext targets are ignored if `gettext` is not installed |
|
|
|
Previously the `i18n` module has errored out when `gettext` tools are |
|
not installed on the system. Starting with this version they will |
|
become no-ops instead. This makes it easier to build projects on |
|
minimal environments (such as when bootstrapping) that do not have |
|
translation tools installed. |
|
|
|
## Support taking environment values from a dictionary |
|
|
|
`environment()` now accepts a dictionary as first argument. If |
|
provided, each key/value pair is added into the `environment_object` |
|
as if `set()` method was called for each of them. |
|
|
|
On the various functions that take an `env:` keyword argument, you may |
|
now give a dictionary. |
|
|
|
## alias_target |
|
|
|
``` meson |
|
runtarget alias_target(target_name, dep1, ...) |
|
``` |
|
|
|
This function creates a new top-level target. Like all top-level |
|
targets, this integrates with the selected backend. For instance, with |
|
Ninja you can run it as `ninja target_name`. This is a dummy target |
|
that does not execute any command, but ensures that all dependencies |
|
are built. Dependencies can be any build target (e.g. return value of |
|
executable(), custom_target(), etc) |
|
|
|
|
|
## Enhancements to the pkg_config_path argument |
|
|
|
Setting sys_root in the [properties] section of your cross file will |
|
now set PKG_CONFIG_SYSROOT_DIR automatically for host system |
|
dependencies when cross compiling. |
|
|
|
## The Meson test program now accepts an additional "--gdb-path" argument to specify the GDB binary |
|
|
|
`meson test --gdb testname` invokes GDB with the specific test case. However, sometimes GDB is not in the path or a GDB replacement is wanted. |
|
Therefore, a `--gdb-path` argument was added to specify which binary is executed (per default `gdb`): |
|
|
|
```console |
|
$ meson test --gdb --gdb-path /my/special/location/for/gdb testname |
|
$ meson test --gdb --gdb-path cgdb testname |
|
``` |
|
|
|
## Better support for illumos and Solaris |
|
|
|
illumos (and hopefully Solaris) support has been dramatically |
|
improved, and one can reasonably expect projects to compile. |
|
|
|
## Splitting of Compiler.get_function_attribute('visibility') |
|
|
|
On macOS there is no `protected` visibility, which results in the |
|
visbility check always failing. 0.52.0 introduces two changes to |
|
improve this situation: |
|
|
|
1. the "visibility" check no longer includes "protected" |
|
2. a new set of "split" checks are introduced which check for a single |
|
attribute instead of all attributes. |
|
|
|
These new attributes are: |
|
* visibility:default |
|
* visibility:hidden |
|
* visibility:internal |
|
* visibility:protected |
|
|
|
## Clang-tidy target |
|
|
|
If `clang-tidy` is installed and the project's source root contains a |
|
`.clang-tidy` (or `_clang-tidy`) file, Meson will automatically define |
|
a `clang-tidy` target that runs Clang-Tidy on all source files. |
|
|
|
If you have defined your own `clang-tidy` target, Meson will not |
|
generate its own target. |
|
|
|
## Add blocks dependency |
|
|
|
Add `dependency('blocks')` to use the Clang blocks extension. |
|
|
|
## Meson's builtin b_lundef is now supported on macOS |
|
|
|
This has always been possible, but there are some additional |
|
restrictions on macOS (mainly do to Apple only features). With the |
|
linker internal re-architecture this has become possible |
|
|
|
## Compiler and dynamic linker representation split |
|
|
|
0.52.0 includes a massive refactor of the representaitons of compilers to |
|
tease apart the representations of compilers and dynamic linkers (ld). This |
|
fixes a number of compiler/linker combinations. In particular this fixes |
|
use GCC and vanilla clang on macOS. |
|
|
|
## Add `depth` option to `wrap-git` |
|
|
|
To allow shallow cloning, an option `depth` has been added to `wrap-git`. |
|
This applies recursively to submodules when `clone-recursive` is set to `true`. |
|
|
|
Note that the git server may have to be configured to support shallow cloning |
|
not only for branches but also for tags. |
|
|
|
## Enhancements to the source_set module |
|
|
|
`SourceSet` objects now provide the `all_dependencies()` method, that |
|
complement the existing `all_sources()` method. |
|
|
|
## added `--only test(s)` option to run_project_tests.py |
|
|
|
Individual tests or a list of tests from run_project_tests.py can be selected like: |
|
``` |
|
python run_project_tests.py --only fortran |
|
|
|
python run_project_tests.py --only fortran python3 |
|
``` |
|
|
|
This assists Meson development by only running the tests for the |
|
portion of Meson being worked on during local development. |
|
|
|
## Experimental Webassembly support via Emscripten |
|
|
|
Meson now supports compiling code to Webassembly using the Emscripten |
|
compiler. As with most things regarding Webassembly, this support is |
|
subject to change. |
|
|
|
## Version check in `find_program()` |
|
|
|
A new `version` keyword argument has been added to `find_program` to |
|
specify the required version. See [`dependency()`](#dependency) for |
|
argument format. The version of the program is determined by running |
|
`program_name --version` command. If stdout is empty it fallbacks to |
|
stderr. If the output contains more text than simply a version number, |
|
only the first occurrence of numbers separated by dots is kept. If the |
|
output is more complicated than that, the version checking will have |
|
to be done manually using [`run_command()`](#run_command). |
|
|
|
## Added `vs_module_defs` to `shared_module()` |
|
|
|
Like `shared_library()`, `shared_module()` now accepts |
|
`vs_module_defs` argument for controlling symbol exports, etc. |
|
|
|
## Improved support for static libraries |
|
|
|
Static libraries had numerous shortcomings in the past, especially |
|
when using uninstalled static libraries. This release brings many |
|
internal changes in the way they are handled, including: |
|
|
|
- `link_whole:` of static libraries. In the example below, lib2 used to miss |
|
symbols from lib1 and was unusable. |
|
```meson |
|
lib1 = static_library(sources) |
|
lib2 = static_library(other_sources, link_whole : lib1, install : true) |
|
``` |
|
- `link_with:` of a static library with an uninstalled static library. In the |
|
example below, lib2 now implicitly promote `link_with:` to `link_whole:` because |
|
the installed lib2 would oterhwise be unusable. |
|
```meson |
|
lib1 = static_library(sources, install : false) |
|
lib2 = static_library(sources, link_with : lib1, install : true) |
|
``` |
|
- pkg-config generator do not include uninstalled static libraries. In the example |
|
below, the generated `.pc` file used to be unusable because it contained |
|
`Libs.private: -llib1` and `lib1.a` is not installed. `lib1` is now omitted |
|
from the `.pc` file because the `link_with:` has been promoted to |
|
`link_whole:` (see above) and thus lib1 is not needed to use lib2. |
|
```meson |
|
lib1 = static_library(sources, install : false) |
|
lib2 = both_libraries(sources, link_with : lib1, install : true) |
|
pkg.generate(lib2) |
|
``` |
|
|
|
Many projects have been using `extract_all_objects()` to work around |
|
those issues, and hopefully those hacks could now be removed. Since |
|
this is a pretty large change, please double check if your static |
|
libraries behave correctly, and report any regression. |
|
|
|
## Enhancements to the kconfig module |
|
|
|
`kconfig.load()` may now accept a `configure_file()` as input file. |
|
|
|
## Added `include_type` kwarg to `dependency` |
|
|
|
The `dependency()` function now has a `include_type` kwarg. It can take the |
|
values `'preserve'`, `'system'` and `'non-system'`. If it is set to `'system'`, |
|
all include directories of the dependency are marked as system dependencies. |
|
|
|
The default value of `include_type` is `'preserve'`. |
|
|
|
Additionally, it is also possible to check and change the |
|
`include_type` state of an existing dependency object with the new |
|
`include_type()` and `as_system()` methods. |
|
|
|
## Enhancements to `configure_file()` |
|
|
|
`input:` now accepts multiple input file names for `command:`-configured file. |
|
|
|
`depfile:` keyword argument is now accepted. The dependency file can |
|
list all the additional files the configure target depends on. |
|
|
|
## Projects args can be set separately for build and host machines (potentially breaking change) |
|
|
|
Simplify `native` flag behavior in `add_global_arguments`, |
|
`add_global_link_arguments`, `add_project_arguments` and |
|
`add_project_link_arguments`. The rules are now very simple: |
|
|
|
- `native: true` affects `native: true` targets |
|
|
|
- `native: false` affects `native: false` targets |
|
|
|
- No native flag is the same as `native: false` |
|
|
|
This further simplifies behavior to match the "build vs host" decision |
|
done in last release with `c_args` vs `build_c_args`. The underlying |
|
motivation in both cases is to execute the same commands whether the |
|
overall build is native or cross. |
|
|
|
## Allow checking if a variable is a disabler |
|
|
|
Added the function `is_disabler(var)`. Returns true if a variable is a disabler |
|
and false otherwise. |
|
|
|
|
|
## gtkdoc-check support |
|
|
|
`gnome.gtkdoc()` now has a `check` keyword argument. If `true` runs it |
|
will run `gtkdoc-check` when running unit tests. Note that this has |
|
the downside of rebuilding the doc for each build, which is often very |
|
slow. It usually should be enabled only in CI. |
|
|
|
## `gnome.gtkdoc()` returns target object |
|
|
|
`gnome.gtkdoc()` now returns a target object that can be passed as |
|
dependency to other targets using generated doc files (e.g. in |
|
`content_files` of another doc). |
|
|
|
## Dist is now a top level command |
|
|
|
Previously creating a source archive could only be done with `ninja |
|
dist`. Starting with this release Meson provides a top level `dist` |
|
that can be invoked directly. It also has a command line option to |
|
determine which kinds of archives to create: |
|
|
|
```meson |
|
meson dist --formats=xztar,zip |
|
```
|
|
|