Distribution tarballs from Mercurial repositories
Creating distribution tarballs can now be made out of projects based on Mercurial. As before, this remains possible only with the Ninja backend.
Keyword argument verification
Meson will now check the keyword arguments used when calling any function and print a warning if any of the keyword arguments is not known. In the future this will become a hard error.
Add support for Genie to Vala compiler
The Vala compiler has an alternative syntax, Genie, that uses the
.gs file extension. Meson now recognises and uses Genie files.
Pkgconfig support for additional cflags
The Pkgconfig module object can add arbitrary extra cflags to the Cflags value in the .pc file, using the "extra_cflags" keyword:
pkg.generate(libraries : libs, subdirs : h, version : '1.0', name : 'libsimple', filebase : 'simple', description : 'A simple demo library.', extra_cflags : '-Dfoo' )
Base options accessible via get_option()
Base options are now accessible via the get_option() function.
uses_lto = get_option('b_lto')
Allow crate type configuration for Rust compiler
Rust targets now take an optional
rust_crate_type keyword, allowing
you to set the crate type of the resulting artifact. Valid crate types
cdylib for shared libraries, and
staticlib for static libraries. For more, see Rust's linkage
Simultaneous use of Address- and Undefined Behavior Sanitizers
Both the address- and undefined behavior sanitizers can now be used
simultaneously by passing
-Db_sanitize=address,undefined to Meson.
Unstable SIMD module
A new experimental module to compile code with many different SIMD instruction sets and selecting the best one at runtime. This module is unstable, meaning its API is subject to change in later releases. It might also be removed altogether.
Import libraries for executables on Windows
The new keyword
executable() allows generation of an import
library for the executable.
Added build_rpath keyword argument
You can specify
build_rpath : '/foo/bar' in build targets and the
given path will get added to the target's rpath in the build tree. It
is removed during the install step.
Meson will print a warning when the user tries to add an rpath linker
flag manually, e.g. via
link_args to a target. This is not
recommended because having multiple rpath causes them to stomp on each
other. This warning will become a hard error in some future release.
Vulkan dependency module
Vulkan can now be used as native dependency. The dependency module will detect the VULKAN_SDK environment variable or otherwise try to receive the vulkan library and header via pkgconfig or from the system.
Limiting the maximum number of linker processes
With the Ninja backend it is now possible to limit the maximum number of
concurrent linker processes. This is usually only needed for projects
that have many large link steps that cause the system to run out of
memory if they are run in parallel. This limit can be set with the
Disable implicit include directories
By default Meson adds the current source and build directories to the
header search path. On some rare occasions this is not desired. Setting
implicit_include_directories keyword argument to
directories are not used.
Support for MPI dependency
MPI is now supported as a dependency. Because dependencies are
language-specific, you must specify the requested language with the
language keyword, i.e.,
dependency('mpi', language='c') will
request the C MPI headers and libraries. See the MPI
dependency for more information.
Allow excluding files or directories from
accepts the new
arguments that allow specified files or directories to be excluded
from the installed subdirectory.
Make all Meson functionality invokable via the main executable
Previously Meson had multiple executables such as
mesontest. They are now invokable via the main Meson executable
meson configure <arguments> # equivalent to mesonconf <options> meson test <arguments> # equivalent to mesontest <arguments>
The old commands are still available but they are deprecated and will be removed in some future release.
Pcap dependency detector
Meson will automatically obtain dependency information for pcap
pcap-config tool. It is used like any other dependency:
pcap_dep = dependency('pcap', version : '>=1.0')
GNOME module mkenums_simple() addition
Most libraries and applications use the same standard templates for
glib-mkenums. There is now a new
mkenums_simple() convenience method
that passes those default templates to glib-mkenums and allows some tweaks
such as optional function decorators or leading underscores.
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