meson: Add post-install script

If we're installing gdk-pixbuf ourselves, we should generate the loaders
cache file — unless DESTDIR is set or we're cross-compiling, in which
case we assume that there's a packaging system hook in place to do this
at the end of a full build.

2 files changed, 24 insertions, 0 deletions

diff --git a/build-aux/post-install.sh b/build-aux/post-install.sh
new file mode 100644
index 000000000..40aab7422
--- /dev/null
+++ b/build-aux/post-install.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/bash
+
+libdir="$1"
+binary_version="$2"
+
+if [ -z "$DESTDIR" ]; then
+        mkdir -p "$libdir/gdk-pixbuf-2.0/$binary_version"
+        gdk-pixbuf-query-loaders > "$libdir/gdk-pixbuf-2.0/$binary_version/loaders.cache"
+else
+        echo "***"
+        echo "*** Warning: loaders.cache not built"
+        echo "***"
+        echo "*** You should generate this file manually on the host system"
+        echo "*** using:"
+        echo "***   gdk-pixbuf-query-loaders > $libdir/gdk-pixbuf-2.0/$binary_version/loaders.cache"
+        echo "***"
+fi
diff --git a/meson.build b/meson.build
index 956b5f58d..40bbee079 100644
--- a/meson.build
+++ b/meson.build
@@ -418,3 +418,10 @@ subdir('thumbnailer')
 
 # Documentation
 subdir('docs/reference/gdk-pixbuf')
+
+if not meson.is_cross_build()
+  meson.add_install_script('build-aux/post-install.sh',
+    gdk_pixbuf_libdir,
+    gdk_pixbuf_binary_version,
+  )
+endif