Add the description tag to the generated pkgconfig filesv5.41.0-rc1v5.41.0

Summary:
pkgconfig complains when the .pc file doesn't have a description. eg:
$ pkg-config Baloo
Package 'Baloo' has no Description: field

With this change, if the DESCRIPTION parameter is not used,
ECM_GENERATE_PKGCONFIG_FILE will :
- First look if there's a metainfo.yaml file and get the description from there
- If the file doesn't exist, or if the description tag is empty or non-existent,
create a description based on the LIB_NAME value

Test Plan: Tests added & pass

Reviewers: dfaure, apol

Reviewed By: dfaure

Subscribers: #frameworks, #build_system

Tags: #frameworks, #build_system

Differential Revision: https://phabricator.kde.org/D9056

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/ECMGeneratePkgConfigFile/metainfo_with_empty_description.yaml b/tests/ECMGeneratePkgConfigFile/metainfo_with_empty_description.yaml
new file mode 100644
index 00000000..c46465d1
--- /dev/null
+++ b/tests/ECMGeneratePkgConfigFile/metainfo_with_empty_description.yaml
@@ -0,0 +1,21 @@
+maintainer: mpyne
+description:
+tier: 1
+type: functional
+platforms:
+    - name: Linux
+    - name: FreeBSD
+    - name: Windows
+    - name: MacOSX
+    - name: Android
+portingAid: false
+deprecated: false
+release: true
+libraries:
+ - qmake: KCoreAddons
+   cmake: "KF5::CoreAddons"
+cmakename: KF5CoreAddons
+
+public_lib: true
+group: Frameworks
+subgroup: Tier 1