dev-libs/glib: workaround Portage bug with binpkgs

With binpkgs, we seem to sometimes get a new dev-libs/gobject-introspection-1.82
installed which needs >=dev-libs/glib-2.82, but without the new glib. We
then try to build glib, we see that we have a gobject-introspection installed
that is new enough via `has_version` (=> we don't try to bootstrap it), then
when trying to use it via `pkg-config`, it falls off because we don't have
the glib that it needs.

This is obviously a Portage bug in not ensuring that gobject-introspection's
dependencies are satisifed before merging its binpkg, but let's workaround
it here: check thoroughly if the available gobject-introspection is usable. If
it ain't, just bootstrap as if it weren't installed.

(Just closing the bug given we don't have a testcase, not much point
in keeping it open and potentially confusing people. It only happens
sometimes and requires some bad luck, unfortunately. If it were always
the case w/ binpkgs, it'd be far easier to debug.)

Closes: https://bugs.gentoo.org/951487
Thanks-to: Artemis Everfree <artemis@artemis.sh>
Signed-off-by: Sam James <sam@gentoo.org>

dev-libs/glib/glib-2.80.5-r1.ebuild

@@ -242,6 +242,18 @@ multilib_src_configure() {
 			return 0
 		fi
 
+		# Do we somehow have a dev-libs/gobject-introspection installed
+		# with an unsatisfied dependency? (bug #951487)
+		if ! $(tc-getPKG_CONFIG) --cflags gobject-introspection-1.0 &> /dev/null ; then
+			return 0
+		fi
+
+		# Make sure has_version didn't lie to us while at it as well,
+		# given bug #951487.
+		if ! $(tc-getPKG_CONFIG) --atleast-version=${INTROSPECTION__PV} gobject-introspection-1.0 &> /dev/null ; then
+			return 0
+		fi
+
 		return 1
 	}
 

dev-libs/glib/glib-2.82.5.ebuild

@@ -230,6 +230,18 @@ multilib_src_configure() {
 			return 0
 		fi
 
+		# Do we somehow have a dev-libs/gobject-introspection installed
+		# with an unsatisfied dependency? (bug #951487)
+		if ! $(tc-getPKG_CONFIG) --cflags gobject-introspection-1.0 &> /dev/null ; then
+			return 0
+		fi
+
+		# Make sure has_version didn't lie to us while at it as well,
+		# given bug #951487.
+		if ! $(tc-getPKG_CONFIG) --atleast-version=${INTROSPECTION__PV} gobject-introspection-1.0 &> /dev/null ; then
+			return 0
+		fi
+
 		return 1
 	}
 

dev-libs/glib/glib-2.84.0.ebuild

@@ -234,6 +234,18 @@ multilib_src_configure() {
 			return 0
 		fi
 
+		# Do we somehow have a dev-libs/gobject-introspection installed
+		# with an unsatisfied dependency? (bug #951487)
+		if ! $(tc-getPKG_CONFIG) --cflags gobject-introspection-1.0 &> /dev/null ; then
+			return 0
+		fi
+
+		# Make sure has_version didn't lie to us while at it as well,
+		# given bug #951487.
+		if ! $(tc-getPKG_CONFIG) --atleast-version=${INTROSPECTION__PV} gobject-introspection-1.0 &> /dev/null ; then
+			return 0
+		fi
+
 		return 1
 	}
 

dev-libs/glib/glib-2.84.1.ebuild

@@ -235,6 +235,18 @@ multilib_src_configure() {
 			return 0
 		fi
 
+		# Do we somehow have a dev-libs/gobject-introspection installed
+		# with an unsatisfied dependency? (bug #951487)
+		if ! $(tc-getPKG_CONFIG) --cflags gobject-introspection-1.0 &> /dev/null ; then
+			return 0
+		fi
+
+		# Make sure has_version didn't lie to us while at it as well,
+		# given bug #951487.
+		if ! $(tc-getPKG_CONFIG) --atleast-version=${INTROSPECTION__PV} gobject-introspection-1.0 &> /dev/null ; then
+			return 0
+		fi
+
 		return 1
 	}