vasilito
facf0c92e0
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
2.8 KiB
GLib's configure options and corresponding macros
The following Meson configure options will result in certain macros or options being defined at build time:
--buildtype={plain,release,minsize,custom}
: No special macros or options
--buildtype={debug,debugoptimized} (debugoptimized is the default)
: -DG_ENABLE_DEBUG -g
-Dglib_debug=disabled
: Omits G_ENABLE_DEBUG when implied by --buildtype/-Ddebug
-Dglib_debug=enabled
: Defines G_ENABLE_DEBUG regardless of --buildtype/-Ddebug
-Dglib_asserts=false
: -DG_DISABLE_ASSERT
-Dglib_checks=false
: -DG_DISABLE_CHECKS
Besides these, there are some local feature specific options, but the main focus here is to concentrate on macros that affect overall GLib behaviour and/or third party code.
GLib's internal and global macros
G_DISABLE_ASSERT
The g_assert() and g_assert_not_reached() macros become non-functional
with this define. The motivation is to speed up end-user apps by
avoiding expensive checks.
This macro can affect third-party code. Defining it when building GLib
will only disable the assertion macros for GLib itself, but third-party code
that passes -DG_DISABLE_ASSERT to the compiler in its own build
will end up with the non-functional variants after including glib.h
as well.
Note: Code inside the assertion macros should not have side effects that affect the operation of the program, as they may get compiled out.
G_DISABLE_CHECKS
This macro is similar to G_DISABLE_ASSERT, it affects third-party
code as mentioned above and the note about G_DISABLE_ASSERT applies
too.
The macros that become non-functional here are g_return_if_fail(),
g_return_val_if_fail(), g_return_if_reached() and
g_return_val_if_reached().
This macro also switches off certain checks in the GSignal code.
G_ENABLE_DEBUG
Quite a bit of additional debugging code is compiled into GLib when this
macro is defined, and since it is a globally visible define, third-party code
may be affected by it similarly to G_DISABLE_ASSERT.
Some of these checks can be relatively expensive at runtime, as they affect
every GObject type cast. Distributions are recommended to disable
G_ENABLE_DEBUG in stable release builds.
The additional code executed/compiled for this macro currently includes the following, but this is not an exhaustive list:
- extra validity checks for
GDate - breakpoint abortion for fatal log levels in
gmessages.cinstead of plainabort()to allow debuggers trapping and overriding them - added verbosity of
gscanner.cto catch deprecated code paths - added verbosity of
gutils.cto catch deprecated code paths - object and type bookkeeping in
gobject.c - extra validity checks in
gsignal.c - support for tracking still-alive
GTasks