Explicitly state visibility

This cuts the exportet symbols from 12k to 2k and the library size from
16Mb to 14Mb, which isn't great but still an improvement.

About 30% of the symbols are coming from the Store:: interface.

nm -C -D /work/install/lib64/libsinkcommon.so.0.1

1 files changed, 1 insertions, 1 deletions

diff --git a/common/resource.h b/common/resource.h
index 30d6c46..d2dba0e 100644
--- a/common/resource.h
+++ b/common/resource.h
@@ -67,7 +67,7 @@ private:
 /**
  * Factory interface for resource to implement.
  */
-class ResourceFactory : public QObject
+class SINKCOMMON_EXPORT ResourceFactory : public QObject
 {
 public:
     static ResourceFactory *load(const QString &resourceName);