Print

---

I just tried on a fresh machine. Correct, it does not complain about `json-c`, likewise it is for UUID. The only thing it writes to error:
```
-- Checking for module 'json-c'
--   No package 'json-c' found
-- Checking for module 'uuid'
--   No package 'uuid' found
```
After those 2 devel packages are installed, the next issue seems it also need a libuuid-devel package (seems needed for Macaroons) Is there a reason? I would suggest making something like this:

```
diff --git a/cmake/XRootDFindLibs.cmake b/cmake/XRootDFindLibs.cmake
index 532c8ce..39654ad 100644
--- a/cmake/XRootDFindLibs.cmake
+++ b/cmake/XRootDFindLibs.cmake
@@ -95,10 +95,12 @@ endif()

 find_package( Macaroons )
 include (FindPkgConfig)
-pkg_check_modules(JSON json-c)
+pkg_check_modules(JSON json-c REQUIRED)
 pkg_check_modules(UUID uuid)
+pkg_check_modules(LIBUUID libuuid)

-if( MACAROONS_FOUND AND JSON_FOUND AND UUID_FOUND )
+
+if( MACAROONS_FOUND AND JSON_FOUND AND UUID_FOUND AND LIBUUID_FOUND )
   set( BUILD_MACAROONS TRUE )
 else()
   set( BUILD_MACAROONS FALSE )
```
It might not need anymore this JSON_FOUND... as it becomes REQUIRED

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