When a project has a bundled copy of our macro included in tarball
source releases, typically in a m4/ or aclocal/ directory, aclocal
uses the serial number to determine whether the system copy in
/usr/share/aclocal is newer or older than the bundled copy. Without
a serial number, the bundled copy will always be used and will not
be overwritten, even if it is outdated.
Signed-off-by: Simon McVittie <smcv@debian.org>
AM_PATH_GTK_3_0 uses AC_PATH_PROG for finding pkg-config. Unfortunately,
that will find the build architecture pkg-config which in turn will miss
the host architecture gtk+3.0. What must be used here is the host
architecture pkg-config and that is found with AC_PATH_TOOL.
Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=894069
Reviewed-by: Simon McVittie <smcv@debian.org>
Fixes: #133
AM_PATH_GTK_3_0([3.4], [], [], [gthread]) results in calling
"pkg-config --atleast-version 3.4 gtk+-3.0 gthread-2.0".
With pkg-config 0.28, that test fails, because the version of
gthread-2.0 is smaller than 3.4. This appears to be a behaviour
change since 0.26, but matches what the documentation said in 0.26.
Bug: https://bugzilla.gnome.org/show_bug.cgi?id=641638
Bug-Debian: https://bugs.debian.org/756476
Reviewed-by: Matthias Clasen <mclasen@redhat.com>
Now that a single shared object can contain multiple backends we also
need to provide a simple way for third party code to verify that the
copy of GDK they are linking to supports their backend.
The simplest way to verify is an m4 macro, GTK_CHECK_BACKEND(), shipped
with the gtk+ m4 macros.
The usage is pretty basic:
GTK_CHECK_BACKEND([x11], [gtk_has_x11=yes], [gtk_has_x11=no])
AM_CONDITIONAL(BUILD_X11_CODE, test "x$gtk_has_x11" = "xno")
https://bugzilla.gnome.org/show_bug.cgi?id=642479
