Otherwise, `CFLAGS='-Wall -Werror' meson build` fails with:
...
Command line: `cc ./glib/build/meson-private/tmp7iwplrgi/testfile.c -o ./glib/build/meson-private/tmp7iwplrgi/output.obj -c -O3 -Werror -Wall -D_FILE_OFFSET_BITS=64 -O0 -std=gnu99` -> 1
stderr:
./glib/build/meson-private/tmp7iwplrgi/testfile.c: In function 'main':
./glib/build/meson-private/tmp7iwplrgi/testfile.c:83:21: error: unused variable 'y' [-Werror=unused-variable]
83 | long double y = frexpl (x, &exp);
| ^
cc1: all warnings being treated as errors
-----------
Checking if "frexpl prototype can be re-listed" compiles: NO
glib/gnulib/meson.build:316:2: ERROR: Problem encountered: frexpl() is missing or broken beyond repair, and we have nothing to replace it with
We have gnulib warnings in windows under clang:
../glib/gnulib/vasnprintf.c:2429:21: warning: variable 'flags' set but not
used [-Wunused-but-set-variable]
int flags = dp->flags;
^
../glib/gnulib/vasnprintf.c:4853:19: warning: unannotated fall-through
between switch labels [-Wimplicit-fallthrough]
case TYPE_LONGINT:
^
See: https://gitlab.gnome.org/3v1n0/glib/-/jobs/2361750
There is currently no `dllimport` attribute on any of our function,
which prevents MSVC to optimize function calls.
To fix that issue, we need to redeclare all our visibility macros for
each of our libraries, because when compiling e.g. GIO code, we need
dllimport in GLIB headers and dllexport in GIO headers. That means they
cannot use the same GLIB_AVAILABLE_* macro.
Since that's a lot of boilerplate to copy/paste after each version bump,
this MR generate all those macros using a python script.
Also simplify the meson side by using `gnu_symbol_visibility : 'hidden'`
keyword argument instead of passing the cflag manually.
This leaves only API index to add manually into glib-docs.xml when
bumping GLib version. That file cannot be generated because Meson does
not allow passing a buit file to gnome.gtkdoc()'s main_xml kwarg
unfortunately.
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.
We need to include the isnan*.c sources as necessary, if any of the
isnan*() functions cannot be found, so that builds on compilers that
lack these functions could be fixed.
Also, if we do have the isnan*() functions, improve the build by not
unnecessarily including the isnan*.c sources in the build.
If the isnan*() functions are found, make sure that the
HAVE_ISNAN*_IN_LIBC macros are defined in the CFLags, so that we do not
accidently require the gnulib implementations for these functions.
Some editors automatically remove trailing blank lines, or
automatically add a trailing newline to avoid having a trailing
non-blank line that is not terminated by a newline. To avoid unrelated
whitespace changes when users of such editors contribute to GLib,
let's pre-emptively normalize all files.
Unlike more intrusive whitespace normalization like removing trailing
whitespace from each line, this seems unlikely to cause significant
issues with cherry-picking changes to stable branches.
Implemented by:
find . -name '*.[ch]' -print0 | \
xargs -0 perl -0777 -p -i -e 's/\n+\z//g; s/\z/\n/g'
Signed-off-by: Simon McVittie <smcv@collabora.com>
The gnulib math code uses __builtin_isnanf and __builtin_isnanl
within the __GNUC__ >= 4 ifdef, and clang doesn't provide those
builtins, only the one without a suffix. Make the meson check
match the code it controls, using the exactly right builtins.
Set REPLACE_ISNAN to 1 if either of the have_isnan* functions failed,
this matches how gnulib's m4 routines does it (in gnulib/m4/isnan.m4).
This fixes the isnan functions in the gnulib math header replacement
work on Clang.
There were a couple of custom paths which could end up being relative,
rather than absolute, due to not properly prefixing them with
`get_option('prefix')`.
The use of `join_paths()` here correctly drops all path components
before the final absolute path in the list of arguments. So if someone
configures GLib with an absolute path for `gio_module_dir`, that will be
used unprefixed; but if someone configures with a relative path, it will
be prefixed by `get_option('prefix)`.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Fixes: #1919
We need to enable building the dirent and gnulib sources for clang-cl,
as we are still using the Microsoft-style headers and lib's and CRT.
We need to also do this for the following, for similar reasoning:
-Symbol export (via __declspec(dllexport))
-Dependency discovery without pkg-config files
-long long and ssize_t detection
We do, however, enable the autoptr tests for clang-cl builds. Note that
at this point real MSVC builds are still better supported than clang-cl
builds, and it will likely remain so for at least the near future,
alhtough real MSVC builds of the GTK stack are consumable and are usable
by clang-cl.
There are now C99 functions that the printf items want to use that may
not be necessarily supported by the math.h that is shipped by the
compiler, such as signbit(), isinf(), isnan() and isfinite() and their
double, long and float counterparts.
This checks for whether these functions are provided by the math.h
shipped by the compiler, and builds the gnulib implementations of them
if they cannot be found. Currently no attempt is made to check whether
these, if available from the compiler's math.h, are compliant with the
specs.
The test programs for those in the Meson build files will not work for
Visual Studio prior to 2013 (whereas the rest of the code does).
Improve the tests for these by:
-Adding a test to see whether we can re-define a prototype for these
functions, using cc.compiles(). If so, set HAVE_DECL_xxxx to be 0,
otherwise set HAVE_DECL_xxxx to be 1.
Also, for glib/gnulib/frexpl.c, don't undefine frexpl on Visual Studio,
otherwise we will not be able to compile/link it on Visual Studio
compilers.
So long, and thanks for everything. We’re a Meson-only shop now.
glib-2-58 will remain the last stable GLib release series which is
buildable using autotools.
We continue to install autoconf macros for autotools-using projects
which depend on GLib; they are stable API.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
The goal of this commit is to reduce differences between the autotools and meson build.
With autotools AC_FUNC_ALLOCA was used which defines HAVE_ALLOCA_H, HAVE_ALLOCA,
C_ALLOCA. meson tried to replicate that with has_function() but alloca can be a macro
and and is named _alloca under Windows. Since we require a working alloca anyway
and only need to know if the header exists replace AC_FUNC_ALLOCA with a simple
AC_CHECK_HEADERS.
There is still one user of HAVE_ALLOCA in the embedded gnulib, but since alloca is
always provided through galloca.h just force define HAVE_ALLOCA there and add a comment.
The docs were mentioning alloca as an example for cross compiling. Since that variable no
longer exists now replace it with another one.
Fix various warnings regarding unused variables, duplicated
branches etc by adjusting the ifdeffery and some missing casts.
gnulib triggers -Wduplicated-branches in one of the copied files,
disable as that just makes updating the code harder.
The warning indicating missing features are made none fatal through
pragmas. They still show but don't abort the build.
https://bugzilla.gnome.org/show_bug.cgi?id=793729
glib enables -Werror=format-nonliteral by default which is triggered
by the embedded gnulib (in vasnprintf.c). Disable that warning
for gnulib alone. The gnulib code is there to handle user provided
format strings, so the warning doesn't add anything anyway.
This fixes the build under MinGW.
https://bugzilla.gnome.org/show_bug.cgi?id=793729
This pollutes the reserved compiler namespace and breaks applications
trying to do their own feature detection. For instance, this falsely
detects that alloca is not a builtin on gcc:
#include <glib.h>
#if defined(__has_builtin)
# if !__has_builtin(alloca)
# error "wtf glib?"
# endif
#else
/* version-checking to determine alloca existence */
#endif
Instead, define our own g_macro__has_* versions that have the
behaviour that we need.
https://bugzilla.gnome.org/show_bug.cgi?id=794635
The HAVE_GOOD_PRINTF config variable determines whether we are able to
use the CRT-supplied *printf() functions directly, by determining whether
the CRT-supplied vsnprintf() and snprintf() functions support C99 well
enough.
This means, we need to build the gnulib subdir as a static lib in GLib, and use
the gnulib *printf() functions when:
-We are on Windows
-The CRT's vsnprintf() and snprintf() is not sufficiently C99-compliant.
This will fix the problem when the *printf() functions cause a CRT
abort() call on pre-2015 Visual Studio builds at least, and ensures that
the Visual Studio 2015+ builds will pass the printf tests in GLib, since
the *printf() in Visual Studio 2015/2017's CRT does not support the %n
format specifier, nor the positional parameters (which requires
different _*printf_p*() functions), as indicated by
glib/tests/test-printf.c.
https://bugzilla.gnome.org/show_bug.cgi?id=783270
Use gnulibg-tool --lgpl to import the vasnprintf module using the
correct GNU Lesser General Public License, version 2.1 or later, like
the rest of GLib.
https://bugzilla.gnome.org/show_bug.cgi?id=777203
Visual Studio 2008 does not come with stdint.h, so define intmax_t instead
on Visual Studio 2008 so that the code will continue to build. This was
previously unnoticed as building GTK+ since 3.16 requires an
implementation of stdint.h (such as msinttypes), and it took care of the
need of including the stdint.h header here, but people could be very well
using GLib without using GTK+ 3.x.
To be honest, i don't remember what problems were caused by it returning the
number of bytes it *wanted* to write instead of the number of bytes
it actually wrote. Probably related to the fact that fwrite could
independently fail, and ignoring its return value ignores that error.
https://bugzilla.gnome.org/show_bug.cgi?id=748064
It updates it to the version c5d07ce91a8ad51591154450442fa4376441fdfa
As a difference with upstream we need to ensure:
* Include "g-gnulib.h" so the methods get the gnulib namespace.
* xsize.h uses G_MAXSIZE instead of SIZE_MAX and the methods are
marked as static inline.
* Some defines are named different from the ones in glib i.e
HAVE_LONG_LONG_INT is HAVE_LONG_LONG
All the unit tests pass properly with and without --enable-included-printf.
It has also been tested on Windows.
https://bugzilla.gnome.org/show_bug.cgi?id=756382
Perform a substantial cleanup of the build system with respect to
building and installing testcases.
First, Makefile.decl has been renamed glib.mk and substantially
expanded. We intend to add more stuff here in the future, like canned
rules for mkenums, marshallers, resources, etc.
By default, tests are no longer compiled as part of 'make'. They will
be built when 'make check' is run. The old behaviour can be obtained
with --enable-always-build-tests.
--disable-modular-tests is gone (because tests are no longer built by
default). There is no longer any way to cause 'make check' to be a
no-op, but that's not very useful anyway.
A new glibtests.m4 file is introduced. Along with glib.mk, this
provides for consistent handling of --enable-installed-tests and
--enable-always-build-tests (mentioned above).
Port our various test-installing Makefiles to the new framework.
This patch substantially improves the situation in the toplevel tests/
directory. Things are now somewhat under control there. There were
some tests being built that weren't even being run and we run those now.
The long-running GObject performance tests in this directory have been
removed from 'make check' because they take too long.
As an experiment, 'make check' now runs the testcases on win32 builds,
by default. We can't run them under gtester (since it uses a pipe to
communicate with the subprocess) so just toss them in TESTS. Most of
them are passing on win32.
Things are not quite done here, but this patch is already a substantial
improvement. More to come.
We have various sub directories in glib/ and gio/ (eg: inotify, gnulib,
pcre, xdgmime, etc.) that build convenience libraries that are then
included into libglib and libgio. The files in these directories need
to be built with the same visibility policy as the files in the first
level directories, so add CFLAGS for them all.
This wasn't a problem when the visibility flags were set directly in
CFLAGS but then we had to deal with some modules that we built that we
explicitly wanted to export symbols from.
For now, we can keep things the way they are because it's less hacky and
although it's a theoretical hazard to forget these CFLAGS, we rarely add
new subdirectories to the build.
2009-02-27 Tor Lillqvist <tml@novell.com>
Bug 167569 - g_string_append_printf crashes on win32 when used
with a NULL argument
* glib/gnulib/vasnprintf.c (vasnprintf): Add workaround for buggy
programs. Patch by Owen.
svn path=/trunk/; revision=7917
2008-09-30 Tor Lillqvist <tml@novell.com>
* glib/gprintf.c
* glib/gnulib/vasnprintf.c: Don't define _GNU_SOURCE on Windows,
as _GNU_SOURCE has unintended side effects when compiling against
newest mingw headers.
svn path=/trunk/; revision=7563
2008-05-29 Tor Lillqvist <tml@novell.com>
* glib/gnulib/printf-args.c (printf_fetchargs): wint_t is short on
Windows, and gcc warns: "wint_t is promoted to int when passed
through ... (so you should pass int not wint_t to va_arg)." So do
that then.
svn path=/trunk/; revision=6956
