nixpkgs/pkgs/development/tools/build-managers/meson/gir-fallback-path.patch

--- a/mesonbuild/modules/gnome.py
+++ b/mesonbuild/modules/gnome.py
@@ -805,6 +805,13 @@
         scan_command += self._scan_langs(state, [lc[0] for lc in langs_compilers])
         scan_command += list(external_ldflags)
 
+        if len(set([girtarget.get_custom_install_dir()[0] for girtarget in girtargets])) > 1:
+            raise MesonException('generate_gir tries to build multiple libraries with different install_dir at once: {}'.format(','.join([str(girtarget) for girtarget in girtargets])))
+
+        fallback_libpath = girtargets[0].get_custom_install_dir()[0]
+        if fallback_libpath is not None and isinstance(fallback_libpath, str) and len(fallback_libpath) > 0 and fallback_libpath[0] == "/":
+            scan_command += ['--fallback-library-path=' + fallback_libpath]
+
         scan_target = self._make_gir_target(state, girfile, scan_command, depends, kwargs)
 
         typelib_output = '%s-%s.typelib' % (ns, nsversion)
meson: pass library install paths to g-ir-scanner We are patching g-ir-scanner to produce absolute paths in the GIR files. When an application uses an internal library placed in a non-standard path (e.g. $out/lib/gnome-shell), the scanner needs to be informed. For autotools-based apps, the full path was obtained from libtool-wrapped files; with Meson, this is no longer possible – we need to pass the path information in some other way. This commit channels the --fallback-library-path option added to g-ir-scanner in aforementioned patch. 2017-11-09 03:48:26 +01:00			`--- a/mesonbuild/modules/gnome.py`
			`+++ b/mesonbuild/modules/gnome.py`
meson: 0.48.2 → 0.49.0 2018-12-12 00:17:41 +01:00			`@@ -805,6 +805,13 @@`
meson: 0.46.1 → 0.48.2 2018-09-02 19:28:49 +02:00			`scan_command += self._scan_langs(state, [lc[0] for lc in langs_compilers])`
			`scan_command += list(external_ldflags)`
meson: pass library install paths to g-ir-scanner We are patching g-ir-scanner to produce absolute paths in the GIR files. When an application uses an internal library placed in a non-standard path (e.g. $out/lib/gnome-shell), the scanner needs to be informed. For autotools-based apps, the full path was obtained from libtool-wrapped files; with Meson, this is no longer possible – we need to pass the path information in some other way. This commit channels the --fallback-library-path option added to g-ir-scanner in aforementioned patch. 2017-11-09 03:48:26 +01:00
meson: 0.46.1 → 0.48.2 2018-09-02 19:28:49 +02:00			`+ if len(set([girtarget.get_custom_install_dir()[0] for girtarget in girtargets])) > 1:`
			`+ raise MesonException('generate_gir tries to build multiple libraries with different install_dir at once: {}'.format(','.join([str(girtarget) for girtarget in girtargets])))`
			`+`
			`+ fallback_libpath = girtargets[0].get_custom_install_dir()[0]`
meson: pass library install paths to g-ir-scanner We are patching g-ir-scanner to produce absolute paths in the GIR files. When an application uses an internal library placed in a non-standard path (e.g. $out/lib/gnome-shell), the scanner needs to be informed. For autotools-based apps, the full path was obtained from libtool-wrapped files; with Meson, this is no longer possible – we need to pass the path information in some other way. This commit channels the --fallback-library-path option added to g-ir-scanner in aforementioned patch. 2017-11-09 03:48:26 +01:00			`+ if fallback_libpath is not None and isinstance(fallback_libpath, str) and len(fallback_libpath) > 0 and fallback_libpath[0] == "/":`
			`+ scan_command += ['--fallback-library-path=' + fallback_libpath]`
			`+`
meson: 0.46.1 → 0.48.2 2018-09-02 19:28:49 +02:00			`scan_target = self._make_gir_target(state, girfile, scan_command, depends, kwargs)`

			`typelib_output = '%s-%s.typelib' % (ns, nsversion)`