- mention installing from local sources, not PyPI
- warn against --user installs, which too often screw up users that then
cannot install projects because ~/.local won't be in sudo's PYTHONPATH
- advise installing with sudo -- current versions of pip assume --user
for you rather than failing with permission errors, which is great
unless, like meson, there are compelling reasons to need to install as
root
Some license identifiers are ambiguous (e.g. "GPL3"). The SPDX license
identifiers avoid this by providing standardized and unique identifiers
(e.g. "GPL-3.0-only" or "GPL-3.0-or-later" for the previous example).
Because SPDX short-form identifiers are also both human- and
machine-readable we should recommend them in the documentation.
More information (advantages, details, etc.) can be found here:
- https://spdx.dev/resources/use/#identifiers
- https://spdx.dev/ids/Fix#7905.
Using the std option, so now `rust_std=..` will work. I've chosen to use
"std" even though rust calls these "editions", as meson refers to
language versions as "standards", which makes meson feel more uniform,
and be less surprising.
Fixes: #5100
Apparently anchor links are case-sensitive and needs to be lowercase in hotdoc.
Prior to this change the anchor links were uppercase so the link did not refer to the anchor tag.
Likely that there are more occurrences around the docs than this, have not looked.
wraps from subprojects are now merged into the list of wraps from main
project, so they can be used to download dependencies of dependencies
instead of having to promote wraps manually. If multiple projects
provides the same wrap file, the first one to be configured wins.
This also fix usage of sub-subproject that don't have wrap files. We can
now configure B when its source tree is at
`subprojects/A/subprojects/B/`. This has the implication that we cannot
assume that subproject "foo" is at `self.subproject_dir / 'foo'` any
more.
You could always specify a list of tests to run by passing the names as
arguments to `meson test`. If there were multiple tests with that name (in the
same project or different subprojects), all of them would be run. Now you can:
1. Run all tests with the specified name from a specific subproject: `meson test subprojname:testname`
1. Run all tests defined in a specific subproject: `meson test subprojectname:`
Also forbid ':' in test names. We already forbid this elsewhere, so
should not be a big deal.
Sometimes, distros want to configure a project so that it does not
use any bundled library. In this case, meson.build might want
to do something like this, where slirp is a combo option
with values auto/system/internal:
slirp = dependency('', required: false)
if get_option('slirp') != 'internal'
slirp = dependency('slirp',
required: get_option('slirp') == 'system')
endif
if not slirp.found()
slirp = subproject('libslirp', ...) .variable('...')
endif
and we cannot use "fallback" because the "system" value should never
look for a subproject.
This worked until 0.54.x, but in 0.55.x this breaks because of the
automatic subproject search. Note that the desired effect here is
backwards compared to the policy of doing an automatic search on
"required: true"; we only want to do the search if "required" is false!
It would be possible to look for the dependency with `required: false`
and issue the error manually, but it's ugly and it may produce an error
message that looks "different" from Meson's.
Instead, with this change it is possible to achieve this effect in an
even simpler way:
slirp = dependency('slirp',
required: get_option('slirp') != 'auto',
allow_fallback: get_option('slirp') == 'system' ? false : ['slirp', 'libslirp_dep'])
The patch also adds support for "allow_fallback: true", which is
simple and enables automatic fallback to a wrap even for non-required
dependencies.
Automatic fallback to subprojects is complicated and should be
pointed out outside the "fallback" keyword argument. It is also
surprising that fallback to a subproject will not happen if
override_dependency has already been used with the request
dependency. Document all this.
This is required to make the various keys in the [user options] section
work the same as they do in the meson_options.txt file, where we don't
have any rules about case sensitivity.
There is some risk here. Someone may be relying on this lower by default
behavior, and this could break their machine files.
Fixes#7731
Instead of the default ones, this is especially important when cross
compiling or when using compilers that aren't compatible with the
default ones.
squash! dependencies/hdf5: Use the actual system compilers
Those function are common source of issue when used in a subproject because they
point to the parent project root which is rarely what is expected and is a
violation of subproject isolation.
* Add preliminary support for the CompCert C Compiler
The intention is to use this with the picolibc, so some GCC flags are
automatically filtered. Since CompCert uses GCC is for linking, those
GCC-linker flags which are used by picolibc, are automatically prefixed
with '-WUl', so that they're passed to GCC.
Squashed commit of the following:
commit 4e0ad66dca9de301d2e41e74aea4142afbd1da7d
Author: Sebastian Meyer <meyer@absint.com>
Date: Mon Aug 31 14:20:39 2020 +0200
remove '-fall' from default arguments, also filter -ftls-model=.*
commit 41afa3ccc62ae72824eb319cb8b34b7e6693cb67
Author: Sebastian Meyer <meyer@absint.com>
Date: Mon Aug 31 14:13:55 2020 +0200
use regex for filtering ccomp args
commit d68d242d0ad22f8bf53923ce849da9b86b696a75
Author: Sebastian Meyer <meyer@absint.com>
Date: Mon Aug 31 13:54:36 2020 +0200
filter some gcc arguments
commit 982a01756266bddbbd211c54e8dbfa2f43dec38f
Author: Sebastian Meyer <meyer@absint.com>
Date: Fri Aug 28 15:03:14 2020 +0200
fix ccomp meson configuration
commit dce0bea00b1caa094b1ed0c6c77cf6c12f0f58d9
Author: Sebastian Meyer <meyer@absint.com>
Date: Thu Aug 27 13:02:19 2020 +0200
add CompCert to meson (does not fully work, yet)
* remove unused import and s/cls/self/
fixes the two obvious LGTM warnings
* CompCert: Do not ignore unsupported GCC flags
Some are safe to ignore, however, as per
https://github.com/mesonbuild/meson/pull/7674, they should not be
ignored by meson itself. Instead the meson.build should take care to
select only those which are actually supported by the compiler.
* remove unused variable
* Only add arguments once.
* Apply suggestions from code review
Co-authored-by: Dylan Baker <dylan@pnwbakers.com>
* Remove erroneous ' ' from '-o {}'.format()
As noticed by @dcbaker
* added release note snippet for compcert
* properly split parameters
As suggested by @dcbaker, these parameters should be properly split into multiple strings.
Co-authored-by: Dylan Baker <dylan@pnwbakers.com>
* Update add_compcert_compiler.md
Added a sentence about the state of the implementation (experimental); use proper markdown
* properly separate arguments
Co-authored-by: Dylan Baker <dylan@pnwbakers.com>
This means that, in the common case of a simple meson.build which
doesn't contain any 'native: true' targets, we won't require a native
compiler when cross-compiling, without needing any changes in the
meson.build.
Documentation of most methods mentions method arguments enclosed in
parentheses. Two methods are an exception and we fix them here to make
the manual more consistent.
Add the ids of any target that needs to be rebuilt before running the
tests as computed by the backend, to the introspection data for tests and benchmarks.
This also includes anything that appears on the test's command line.
Without this information, IDEs must update the entire build before running
any test. They can now instead selectively build the test executable
itself and anything that is needed to run it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The -Doption=value style argument works for all builtin options,
and compiler options passed to meson. And some universal options,
have additional ways to be passed. However, base options (and compiler
options) do not have exactly the same ways of passing as universal
options.
This change adds a few pieces of information, which might get lost,
if the manual is not read serially.
[skip ci]
This is useful for automatically generated docs (doxygen, hotdoc)
with a lot of generated files that may differ with different
versions of the generator.
A common pattern in Qt5 applications is to embed translations in the
executable using the qresource system. In this case, the list of
translation files is already available in the .qrc file and there's no
good reason to duplicate this info in meson.build.
Let compile_translations optionally take a qrc input, in which case it
will go straight to generating the relevant translations and
rcc-generated .cpp, and directly return the thing users actually care
about -- the .cpp for linking.
There are a couple new users of Meson that might be worth mentioning.
502 commits later, Libvirt and QEMU have both switched!
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- Exceptions raised during subproject setup were ignored.
- Allow c_stdlib in native file, was already half supported.
- Eliminate usage of subproject variable name by overriding
'<lang>_stdlib' dependency name.
This attempts to clarify the usage of strings and arrays, as well as
document the boolean type that has been exposed via the project and
built-in options
This is like the project options, but for meson builtin options.
The only real differences here have to do with the differences between
meson builtin options and project options. Some meson options can be set
on a per-machine basis (build.pkg_config_path vs pkg_config_path) others
can be set on a per-subproject basis, but should inherit the parent
setting.
This allows adding a `[project options]` section to a cross or native file
that contains the options defined for a project in it's meson_option.txt
file.
* Add boost_root support to properties files
This commit implements `boost_root`, `boost_includedir`, and
`boost_librarydir` variable support to native and cross properties
files. The search order is currently environment variables, then
these variables, and finally a platform-dependent search.
* Add preliminary boost_root / boost_includedir tests
Each test contains a fake "version.hpp", as that's how boost detection is
currently being done. We look for this file relative to the root directory,
which probably shouldn't be allowed (it previously was for BOOST_LIBRARYDIR
but not for BOOST_ROOT). It also cannot help with breakage detection in
libraries, however it looks like this wasn't getting tested beforehand.
I've given the two unique version numbers that shouldn't be present in any
stock version of boost (001 and 002).
* Add return type to detect_split_root
* Return empty list when nothing found in BOOST_ROOT, rather than None
* Update boost_root tests
* Create nativefile.ini based on location of run_project_tests.py
* Add fake libraries to ensure boost_librarydir is being used
* Require all search paths for boost to be absolute
* Redo boost search ordering
To better match things like pkg-config, we now look through native/cross files,
then environment variables, then system locations for boost installations.
Path detection does not fall back from one method to the next for properties or
environment variables--if boost_root, boost_librarydir, or boost_includedir is
specified, they must be sufficient to find boost. Likewise for BOOST_ROOT and
friends. pkg-config detection is still optional falling back to system-wide
detection, for Conan.
(Also, fix a typo in test 33's nativefile)
* Correct return type for detect_roots
* Correct boost dependency search order in documentation
* Print debug information for boost library finding, to resolve CI issues
* Handle native/cross file templates in a more consistent way
All tests can now create a `nativefile.ini.in` if they need to use some
parameter that the testing framework knows about but they can't.
* Pass str--rather than PosixPath--to os.path.exists, for Python35
* Look for boost minor versions, rather than boost patch versions in test cases
* Drop fake dylib versions of boost_regex
* Prefer get_env_var to use of os.environ
* Correct error reporting for relative BOOST_ROOT paths
* Bump version this appears in. Also, change "properties file" to "machine file" as that appears to be the more common language.
We have experimented with the module for about a year in a qemu
branch (https://wiki.qemu.org/Features/Meson), and we would like to
start moving the build system to meson. For that, keyval should have
the stability guarantees.
Cc: Paolo Bonzini <pbonzini@redhat.com>
This header erroneously referred to the dynamic linker while the paragraph talks about
the "link editor." Change the title to account for the difference.
We don't need the legacy variable name system as for dependency()
fallbacks because meson.override_find_program() is largely used already,
so we can just rely on it.
The value for that key must be a coma separated list of dependecy names
provided by that subproject, when no variable name is needed because the
subproject uses override_dependency().
Machine files already supports `+` operator as an implementation detail,
since it's using eval(). Now make it an officially supported feature and
add a way to define constants that are used while evaluating an entry
value.
The documentation of gnome.generate_gir() has duplicated entry for
dependencies parameter. As a fix, this patch removes the entry added
recently.
Fixes: 893d101fff ("gnome: Add header kwarg to generate_gir()")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Should be "sources" not "source"
```
../meson.build:162: WARNING: Passed invalid keyword argument "source".
WARNING: This will become a hard error in the future.
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/mesonbuild/mesonmain.py", line 131, in run
return options.run_func(options)
File "/usr/local/lib/python3.7/site-packages/mesonbuild/msetup.py", line 245, in run
app.generate()
File "/usr/local/lib/python3.7/site-packages/mesonbuild/msetup.py", line 159, in generate
self._generate(env)
File "/usr/local/lib/python3.7/site-packages/mesonbuild/msetup.py", line 192, in _generate
intr.run()
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreter.py", line 4359, in run
super().run()
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 465, in run
self.evaluate_codeblock(self.ast, start=1)
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 490, in evaluate_codeblock
raise e
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 483, in evaluate_codeblock
self.evaluate_statement(cur)
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 498, in evaluate_statement
self.assignment(cur)
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 1151, in assignment
value = self.evaluate_statement(node.value)
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 500, in evaluate_statement
return self.method_call(cur)
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 895, in method_call
return obj.method_call(method_name, args, self.kwargs_string_keys(kwargs))
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 39, in method_call
return method(args, kwargs)
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 285, in wrapped
return f(*wrapped_args, **wrapped_kwargs)
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 151, in wrapped
return f(*wrapped_args, **wrapped_kwargs)
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 213, in wrapped
return f(*wrapped_args, **wrapped_kwargs)
File "/usr/local/lib/python3.7/site-packages/mesonbuild/interpreter.py", line 484, in partial_dependency_method
pdep = self.held_object.get_partial_dependency(**kwargs)
TypeError: get_partial_dependency() got an unexpected keyword argument 'source'
FAILED: build.ninja
```
D lang compilers have an option -release (or similar) which turns off
asserts, contracts, and other runtime type checking. This patch wires
that up to the b_ndebug flag.
Fixes#7082
The implementation of this function has changed enough that the name
doesn't really reflect what it actually does. It basically returns true
unless you're cross compiling, need and exe_wrapper, and don't have one.
The original function remains but is marked as deprecated.
This makes one small change the meson source language, which is that it
defines that can_run_host_binaries will return true in build == host
compilation, which was the behavior that already existed. Previously
this was undefined in build == host compilation.
The system tool is always the wrong thing to use and cause hard to debug
issues when trying to link system libraries with cross built binaries.
The ExternalDependency base class already had a method to deal with
this, used by PkgConfigDependency and QtBaseDependency, so it should
make things more consistent.
Discussions in #6524 have shown that there are various possible uses of the
kconfig module and even disagreements in the exact file format between
Python-based kconfiglib and the tools in Linux. Instead of trying to
reconcile them, just rename the module to something less suggestive and
leave any policy to meson.build files.
In the future it may be possible to add some kind of parsing through
keyword arguments such as bool_true, quoted_strings, etc. and possibly
creation of key-value lists too. For now, configuration_data objects
provide an easy way to access quoted strings. Note that Kconfig stores
false as "absent" so it was already necessary to write "x.has_key('abc')"
rather than the more compact "x['abc']". Therefore, having to use
configuration_data does not make things much more verbose.
Gtest can output junit results with a command line switch. We can parse
this to get more detailed results than the returncode, and put those in
our own Junit output. We basically just throw away the top level
'testsuites' object, then fixup the names of the tests, and shove that
into our junit.
* WIP: Document formal Meson grammar
* Various little fixes [skip ci]
1) Add missing logical_not_expr
2) 'in' and 'not in' are valid relational operators at least for dicts
3) dictionary keys can be expressions, but kwarg names cannot
4) typo logical_end_expression -> logical_and_expression
5) Make jump statements only allowed inside an iteration statement
* Rework EBNF style [skip ci]
As there is no good order for the productions, just go alphabetically.
The EBNF style was changed to match the one the Python lark project
uses, that is colons for productions and terminals enclosed in double
quotes.
* Add missing production for unary operators [skip ci]
* Add production for multiline strings [skip ci]
* Properly define terminal symbols [skip ci]
Depending on the EBNF flavor, regex can be used to describe the terminal
symbols. Lark allows this, and as it was mentioned as a possible user of
this grammar, let's follow its flavor here. Most regexes used are easily
human-readable, and we can always add comments to more complicated ones.
* Small changes to which expressions can be used where [skip ci]
Let the grammar be very general. The type system then has to check, that
the used expression really evaluates to the correct type. Even if we
know today that assignment expressions always evaluate to None (and can
therefore only be used as a toplevel expression in an expression
statement), this needn't be the case forever. So this way, the grammar
stays stable even if such changes were made.
* Rework function argument list production [skip ci]
* Be more verbose for production names [skip ci]
Rename expr -> expression, stmt -> statement, op -> operator, program ->
build_definition. Also adjust some list productions.
* Add paragraph about syntax stability promises [skip ci]
Update the test.json schema, adding the 'stdout' property.
Also amend the test.json schema so the presence of an unexpected
property on the root object causes a validation error.
v2:
Also add 'tools' property to json schema.
Amend the documentation not to use the word 'list' to describe a dict.
Expected stdout lines must match lines from the actual stdout, in the
same order. Lines with match type 're' are regex matched.
v2:
Ignore comment lines in expected_stdout
v3:
Automatically adjust path separators for location in expected output
v4:
Put expected stdout in test.json, rather than a separate file
Adds the `tools` section to `tests.json` to specify requirements
for the tools in the environment. All tests that fail at least
one tool requirements check are skipped.
- ExternalProgramHolder has path() method while CustomTargetHolder and
BuildTargetHolder have full_path().
- The returned ExternalProgramHolder's path() method was broken, because
build.Executable object has no get_path() method, it needs the
backend.
- find_program('overridden_prog', version : '>=1.0') was broken because
it needs to execute the exe that is not yet built. Now assume the
program has the (sub)project version.
- If the version check fails, interpreter uses
ExternalProgramHolder.get_name() for the error message but
build.Executable does not implement get_name() method.
JUnit is pretty ubiquitous, lots of services and results viewers
understand it, in particular gitlab and jenkins know how to consume
JUnit xml. This means projects using CI services can have their test
results consumed automatically.
Fixes: #6972
This does a couple of nice things, one is that editors like vscode can
be configured to use this schema to provide auto completion and error
highlighting if invalid values are added or required values are missing.
It also allows us test that the format of the test matrix work in a unit
test, which I've added. It does require that the python jsonschema
package is installed.
It can happen that a server is temporaly down, tarballs often have
many mirrors available so we should be able to add at least one fallback
mirror in wrap files.
Refine documentation of the default name_prefix, so people don't get the
impression they can write logic which uses 'lib' as the default, when
they should be defaulting to '[]', to let us take care of the
complexities.
Rather than having two separate sections with duplicated information
lets just have one for the common settings, and only document sections
specific to each file in separately
PR #6363 made it so our interpretation of env vars no longer clashed
with Autoconf's: if both Meson and Autoconf would read and env var, both
would do the same things with the value they read.
However, there were still cases that autoconf would read an env var when
meson wouldn't:
- Autoconf would use `CC` in cross builds too
- Autoconf would use `CC_FOR_BUILD` in native builds too.
There's no reason Meson can't also do this--if native cross files
overwrite rather than replace env vars, cross files can also overwrite
rather than replace env vars.
Because variables like `CC` are so ubiquitous, and because ignoring them
in cross builds just makes those builds liable to break (and things more
complicated in general), we bring Meson's behavior in line with
Autoconf's.
It may not be obvious to users that these two ways to set build-types
override each other and specifying both is redundant, and conflicts
are resolved based on whichever is specified later.
Closes https://github.com/mesonbuild/meson/issues/6742
This is needed when mixing D and C code, as it's possible to end up
witha combination of linkers and compilres such that C produces pdb
files but D does not.
This allows the harness to apply the version correctly, putting it in the right
place, dropping the right amount of numbers, etc.
pdb taking a version allows it to be more easily copied from the
shared_lib type.
[why]
Sometimes one want to set the 'Conflicts:' field in .pc files.
This is possible by using the 'conflicts' keyword argument in the
pkgconfig module. The feature is not documented on mesonbuild.org,
though.
But a warning is issued:
WARNING: Passed invalid keyword argument "conflicts".
WARNING: This will become a hard error in the future.
History:
It has been added along with kwarg 'url' with commit
309041918 pkgconfig: Add missing 'URL' and 'Conflicts' entries
Later the kwargs check has been introduced with
80d665e8d Converted some modules.
but both 'url' and 'conflicts' were missing.
With commit
2acf737b pkgconfig: Document url keyword
the 'url' kwarg has been added to the checks, but not 'conflicts'.
[how]
Add 'conflicts' to the allowed kwargs.
Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>
Similar to meson.override_find_program() but overrides the result of the
dependency() function.
Also ensure that dependency() always returns the same result when
looking for the same dependency, this fixes cases where parts of the
project could be using a system library and other parts use the library
provided by a subproject.
Otherwise you have to hunt through the source code. Specifically, this
is defined in `mesonbuild/coredata.py`: `set_buildtype_from_others()`
and `set_others_from_buildtype()`
As any child of BuildTargetHolder might need the name of the object,
provides a method to get object name.
This is useful in gst-build to display the plugin name and not
the filename.
Emscripten does have a stand alone linker, wasm-ld. This patch adds the
linker, adds detection for the linker, and removes the IsLinkerMixin for
emscripten. This is a little more correct, and makes the code a lot
cleaner and more robust.
Emscripten has pthread support (as well as C++ threads), but we don't
currently implement them. This fixes that by adding the necessary code.
The one thing I'm not sure about is setting the pool size. The docs
suggest that you really want to do this to ensure that your code works
correctly, but the number should really be configurable, not sure how to
set that.
Fixes#6684
This adds a warnings counter for subprojects that passed. This is to
encourage developpers to check warnings in the logs and hopefully fix
them. Otherwise they could be hidden in hundreds lines of logs.
This also print the error message for subprojects that did not pass. The
error message is often enough to fix the issue (e.g. missing
dependency) and it's easier than searching in the logs why a subproject
failed.
This is more correct, and forces the target(s) to be rebuilt if the
PDB files are missing. Increases the minimum required Ninja to 1.7,
which is available in Ubuntu 16.04 under backports.
We can't do the same for import libraries, because it is impossible
for us to know at configure time whether or not an import library will
be generated for a given DLL.
This makes two basic changes, 1 it moves the name of the linker into the
linker class, this should reduce the number of errors and typos, and
ensure that a linker always has one name. This then renames the linkers
to have more consistent names.
Posix/gnu linkers are called ld.<name>: ld.gold, ld.lld, ld.solaris.
Apple linkers are renamed ld64.
These are pretty much all over the place because I never intended them
to be exposed to the meson source language, they were meant just for
documentation.
This allows users to disable writing out the inbuilt variables to
the pkg-config file as they might actualy not be required.
One reason to have this is for architecture-independent pkg-config
files in projects which also have architecture-dependent outputs.
For example : https://gitlab.freedesktop.org/wayland/weston/issues/269Fixes#4011
This is a significant speed-up on Windows because terminals are
slow to print things out.
Speed-up in gst-build on Windows:
```
meson install:
before: 5.1 seconds
after: 4.0 seconds
```
This improves the common case of a simple meson.build which doesn't
contain any 'native: true' targets to not require a native compiler when
cross-compiling, without needing any changes in the meson.build.
v2:
Do it the right way around!
Currently it's just like if all builtin/base/compiler options are
yielding. This patch makes possible to have non-yielding builtin
options. The value in is overriden in this order:
- Value from parent project
- Value from subproject's default_options if set
- Value from subproject() default_options if set
- Value from command line if set
The documentation of "order-only" dependencies is limited and their
various purposes are especially not clear. See issue #6391 for a recent
example, search the internet for many more. So mention the particular
purpose here while making the documentation barely longer.
This allows Meson native-file [properties] to be used.
This avoids the need to call meson from a script file or have a
long command line invocation of `meson setup`
The method meson.get_native_property('prop', 'fallback') is added.
The native file can contain properties like
```
[properties]
myprop1 = 'foo'
mydir2 = 'lib/custom'
```
Then from within `meson.build`
```meson
x1 = meson.get_native_property('myprop1')
thedir = meson.get_native_property('mydir2', 'libs')
```
fallback values are optional
The rust code is ugly, because rust is annoying. It doesn't invoke a
linker directly (unless that linker is link.exe or lld-link.exe),
instead it invokes the C compiler (gcc or clang usually) to do it's
linking. Meson doesn't have good abstractions for this, though we
probably should because some of the D compilers do the same thing.
Either that or we should just call the c compiler directly, like vala
does.
This changes the public interface for meson, which we don't do unless we
absolutely have to. In this case I think we need to do it. A fair number
of projects have already been using 'ld' in their cross/native files to
get the ld binary and call it directly in custom_targets or generators,
and we broke that. While we could hit this problem again names like
`c_ld` and `cpp_ld` are far less likely to cause collisions than `ld`.
Additionally this gives a way to set the linker on a per-compiler basis,
which is probably in itself very useful.
Fixes#6442
This fixes an issue with generated sources and object libraries, as
well as an issue on windows with the `link` linker and the vs backend.
The last issue is resolved by building the source files multiple times
to avoid extracting object files in meson.
this can be useful for if/elif where linker behaviors must be
considered.
For example, clang with "link" vs gcc with "ld.bfd" etc.
ci for compiler.get_linker_id() method
doc
add @FeatureNew check
Co-Authored-By: Daniel Mensinger <daniel@mensinger-ka.de>
is_samepath better reflects the nature of this function--that files
and directories can be compared.
Also, instead of raising exceptions, simply return False when one
or both .is_samepath(path1, path1) don't exist. This is more
intuitive behavior and avoids having an extra if fs.exist() to go
with every fs.is_samepath()
Meson's documentation about cross-compilation made me finally understand
why the typical confusion about machine names. Thanks, but let's make it
even better. Don't wait until the very end of the section to reveal the
most important information: that machine names are relative. For
suspense we already have TV shows; spill the beans much earlier.
Also fix the first, simplest cross-compilation example: target is
irrelevant.
This default behavior can have surprising and time-consuming outcomes.
I was wondering why certain tests using several external, fixed libraries
would fail only with Meson and not with CMake or manual runs.
It turned out mtest.py enables MALLOC_PERTURB_ by default, which is
surprising--a topic for another Issue/PR.
At least, this surprising default is documented with workarounds.
Scalapack uses a library stack that can be challenging to manage.
Not least of all since many Scalapacks ship with broken / incomplete
pkg-config files and CMake FindScalapack.cmake
This resolves those issues for typical Scalapack setups including:
* Linux: Intel MKL or OpenMPI + Netlib
* MacOS: Intel MKL or OpenMPI + Netlib
* Windows: Intel MKL (OpenMPI not available on Windows)
Probably dating back to the former mesonrewriter command?
Fixes commit d4fe805a51
In some corner cases, "rewriter" could be mistaken as a positional
argument.
Meson doesn't currently provide a very helpful message when trying to generate a coverage report with clang, and in fact just silently fails for 2 of the 3 reports. Ideally Meson would support coverage with llvm-cov, or provide a more helpful error message. Until then, it seems it would be helpful to at least put a warning in the documentation
The current state of this manual can best be described as... confusing.
The flow of the page jumps from one topic to the next without ever
actually telling you what you can do, so it's almost impossible to keep
track of what is supported, while instead going into involved derails
about why you'd want to use a wrap, and scattering some (but not all)
information throughout the promo material.
The most important changes this rewrite does (aside from turning
supported keys into a list of bullet points) is adding documentation for
the lead_directory_missing property, and mentioning that wrap-hg and
wrap-svn exist. I had to find out all of this by reading the source code
implementation, so let's try to save other people the effort.
Other miscellania: as per @jpakkane's comment, take the opportunity to
point out that wrap dependencies are also useful on Linux, in cases
where your distro doesn't have a new enough version of "$dependency".
It's a fairly common problem outside of select rolling-release distros,
so well worth mentioning.
The documentation already contains an example for PCH but misses the
to show the content of the PCH files and how to create them.
With this commit exactly this is exlained.
In qemu, minikconf generates a depfile that meson could use to
automatically reconfigure on dependency change.
Note: someone clever can perhaps find a way to express this with a
ninja rule & depfile=. I didn't manage, so I wrote a simple depfile
parser.
I originally liked "solaris", but I've changed my mind. Both illumos
(the open-source fork of OpenSolaris) and Oracle's closed-source
Solaris are identified by the same token, and there are differences
between them; so using "sunos" as a sort "supertype" for both makes
sense to me.
* backends/vs: Only set platform_toolset if it isn't already set
* interpreter: set backend up after the compiler
Otherwise we won't be able to check which VS toolchain to use.
* docs/using-visual-studio: wrap lines
* docs: recommend the py launcher instead of python3 for windows
* set backend.environment when building a dummy version
* backends/vs: Add support for clang-cl with vs2017 and vs2019 backends
* backends/vs: Add support for ICL (19.x) with vs2015 and vs2017 backends
'if_true' sources should be built with their dependencies, as
illustrated by test case change.
Ideally, I think we would want only the files with the dependencies to
be built with the flags, but that would probably change the way
sourceset are used.
At configure time, kconfig can read from configure_file().
"test cases/kconfig/4 load_config builddir/meson.build" was already
showing a workaround, now it actually can take configure_file input
directly.
This reverts the changes to the `section` key for the
buildoptions and moves the machine choice into it's
own `machine` key.
With this commit the __undocumented__ breaking change
to the introspection format (introduced in 0.51.0) is
reverted and a new key is added instead.
Eli Schwartz