intl is complicated to look up. Some of that complexity now resides in
Meson, since 0.59.0, via a `dependency('intl')` lookup, so use that
instead.
The Meson lookup doesn't include all the checks here, but likewise this
meson.build doesn't include all the checks in Meson. Particularly, the
following are different:
- Meson accurately detects support built into libc, even if that
conflicts with an external library version (which should be detected as
broken and thus not-found, but glib does not do so).
The problem here is that depending on which libintl.h header is first
in the search path, the *gettext symbols may be the libc ABI, or they
may be renamed to libintl_*gettext, then additionally take over the
*gettext names via a macro, in order to invoke the external library
version even on systems where there is a libc builtin. This means that
checking for `cc.has_function()` correctly reports that there is such
a function in libc, but that unfortunately does not mean it is usable,
because source code referencing `ngettext` etc. will expect to be
linked to `libintl_ngettext`.
- glib checks whether the found intl requires pthread, rather than
simply trusting the result of `cc.find_library()` for the external
library case.
Do the heavy lifting by using Meson to check for intl, and select the
correct implementation, but do a post-discovery check if the symbol is
linkable both with/without pthread.
The logic is still a bit hairy, and eventually more of the logic could
be moved into Meson. But it's better than before.
Fixes incorrect detection of intl on musl-based systems (which have a
less capable libc intl), when GNU libintl is installed as an external
library.
iconv is complicated to look up. That complexity now resides in
Meson, since 0.60.0, via a `dependency('iconv')` lookup, so use that
instead.
No effort is made to support the old option for which type of iconv to
use. It was a false choice, because if only one was available, then
that's the only one you can use, and if both are available, the external
iconv shadows the builtin one and renders the builtin one unusable,
so there is still only one you can use.
This meant that when configuring glib with -Diconv=libc on systems that
had an external iconv, the configure check would detect a valid libc
iconv, try to use it, and then fail during the build because iconv.h
belongs to the external iconv and generates machine code using the
external iconv ABI, but fails to link to the iconv `find_library()`.
Meson handles this transparently.
Rather than carrying the copylib around inside GLib, which is a pain to
synchronise and affects our code coverage statistics.
This requires updating the CI images to cache the new subproject,
including updating the `cache-subprojects.sh` script to pull in git
submodules.
It also requires adding `gioenumtypes_dep` to be added to the
dependencies list of `libgio`, since it needs to be build before GVDB as
it’s pulled in by the GIO headers which GVDB includes.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Helps: #2603
Atomic APIs provide a way to exchange values only if we compare a value
that is equal to the old value, but not to just exchange the value
returning the old one.
However, compilers provide such built-in functions, so we can use them
to expose such functionality to GLib.
The only drawback is that when using an old version of gcc not providing
atomic APIs to swap values, we need to re-implement it with an
implementation that may not be fully atomic, but that is safe enough.
However this codepath should really not be used currently as gcc
introduced __atomic_exchange_n() at version 4.7.4, so 8 years ago.
Since Meson 0.54.0, `dependency('zlib')` will fallback on systems
without a pkg-config dependency, to a system dependency lookup that
performs the necessary `find_libary('z')` (or MSVC zlib/zlib1) and
`has_header('zlib.h')` checks.
This means all the manual lookups are no longer needed, and a single
dependency lookup covers all cases, and also clarifies the log lookup by
not sometimes listing "not found" a couple times.
With Meson 0.60 (or possibly some earlier versions) we can factor the
checks out as a variable can now be used as an array key. This
simplifies the checks a little, while introducing no functional
differences.
The contents of `g_sizet_compatibility` after this block are identical
with and without the changes applied.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Since Meson 0.47, this can be used to check a header with compilation,
rather than just stat. This removes a workaround.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Check the spawn implementation behaviour when the stderr is a
socket (mostly for win32).
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
As per meson spec, returncode() produces unspecified data if
compiled() == false. Check compiled() first to avoid relying
upon unspecified data.
In addition, muon -- an implemetation of meson written in C goes
further and forbids returning unspecified data. This is a good
decision, but also makes it harder to support applications which
wrongly use meson API. Therefore, application needs to be fixed.
It is not only shorter than `not meson.is_cross_build() or
meson.has_exe_wrapper()` but also handle the case of cross compiling to
a compatible arch such as building for i386 on an amd64.
Move msvc warnings in meson.build file from line 24 to line 469 to group
them next to gcc/clang warnings. So it is easier to see warnings flags
for all platforms at once.
This reverts commit 4a4d9eb662.
It seems to cause build failures with `VsDevCmd.bat` 2022:
```
..\meson.build:2274:0: ERROR: Command "C:\Program Files\Meson\meson.exe runpython --version" failed with status 2.
```
Revert it for now until this can be fixed in Meson.
See https://gitlab.gnome.org/GNOME/glib/-/merge_requests/2541#note_1410521
It can be treated like any other command, we don't need a full blown
module capable of building extensions just to get an ExternalProgram
executable that can be used to run scripts.
Since find_program has a builtin kwarg for requiring a given version, we
can avoid manually coding some checks and emitting a custom error.
When working with storage (especially GInputStream or GOutputStream) it
is preferred to use page-aligned buffers so that the operating system
can do page-mapping tricks as the operation passes through the kernel.
Another use case is allocating memory used for vectorised operations,
which must be aligned to specific boundaries.
POSIX and Windows, as well as the C11 specification, provide this kind
of allocator functions, and GLib already makes use of it inside GSlice.
It would be convenient to have a public, portable wrapper that other
projects can use.
Fixes: #2574
Glib cannot be built statically on Windows because glib, gobject and gio
modules need to perform specific initialization when DLL are loaded and
cleanup when unloaded. Those initializations and cleanups are performed
using the DllMain function which is not called with static builds.
Issue is known for a while and solutions were already proposed but never
merged (see: https://gitlab.gnome.org/GNOME/glib/-/issues/692). Last
patch is from version 2.36.x and since then the
"constructor/destructor" mechanism has been implemented and used in
other part of the system.
This patch takes back the old idea and updates it to the last version of
glib to allow static compilation on Windows.
WARNING: because DllMain doesn't exist anymore in static compilation
mode, there is no easy way of knowing when a Windows thread finishes.
This patch implements a workaround for glib threads created by calling
g_thread_new(), so all glib threads created through glib API will behave
exactly the same way in static and dynamic compilation modes.
Unfortunately, Windows threads created by using CreateThread() or
_beginthread/ex() will not work with glib TLS functions. If users need
absolutely to use a thread NOT created with glib API under Windows and
in static compilation mode, they should not use glib functions within
their thread or they may encounter memory leaks when the thread finishes.
This should not be an issue as users should use exclusively the glib API
to manipulate threads in order to be cross-platform compatible and this
would be very unlikely and cumbersome that they may mix up Windows native
threads API with glib one.
Closes#692
This code was skipping fsync on BTRFS because of an old guarantee about
the overwrite-by-rename behavior that no longer holds true. This has
been confirmed by the BTRFS developers to no longer be guaranteed since
Kernel 3.17 (August 2014), but it was guaranteed when this optimization
was first introduced in 2010.
This could result in empty files after crashes in applications using
g_file_set_contents(). Most prominently this might have been the cause
of dconf settings getting lost on BTRFS after crashes due to the
frequency with which such writes can happen in dconf.
See: https://gitlab.gnome.org/GNOME/dconf/-/issues/73
Using ld_flags would work, but that does not propagate ldflags to users
of glib. Meson's dependency() call will propagate apple framework
dependencies to downstream users.
Previously they were only passed to the C compiler, which meant disabled
warnings were still emitted when (for example) including C headers from
C++ and ObjC files.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
It is exactly the same wrap as the one in WrapDB but with a different
name. That fix error when multiple projects uses pcre and they don't
have the same wrap name:
meson.build:1:0: ERROR: Multiple wrap files provide 'libpcre' dependency: pcre.wrap and libpcre.wrap
This is what’s available in the new Debian Stable, so we can expect it
to be available pretty much everywhere.
Subsequent commits will clean up old workarounds.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
