From 9d5219724d4eddf1e96a4e4a421f645069dd504a Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Thu, 6 Jul 2023 17:16:58 +0200
Subject: cmake: support optional pkg-config deps

---
 cmake/opentrack-pkg-config.cmake | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

(limited to 'cmake')

diff --git a/cmake/opentrack-pkg-config.cmake b/cmake/opentrack-pkg-config.cmake
index 5b84cf40..0f13defc 100644
--- a/cmake/opentrack-pkg-config.cmake
+++ b/cmake/opentrack-pkg-config.cmake
@@ -1,7 +1,8 @@
 include_guard(GLOBAL)
 include(FindPkgConfig)
 
-function(otr_pkgconfig target)
+function(otr_pkgconfig_ ret target)
+    set(${ret} 1 PARENT_SCOPE)
     foreach(i ${ARGN})
         set(k pkg-config_${i})
         pkg_check_modules(${k} QUIET ${i})
@@ -11,6 +12,17 @@ function(otr_pkgconfig target)
             target_include_directories(${target} SYSTEM PRIVATE ${${k}_INCLUDE_DIRS} ${${k}_INCLUDEDIR})
             target_link_libraries(${target} ${${k}_LIBRARIES})
         else()
+            set(${ret} 0 PARENT_SCOPE)
+        endif()
+    endforeach()
+endfunction()
+
+function(otr_pkgconfig target)
+    set(ret "")
+    otr_pkgconfig_(ret "${target}" ${ARGN})
+    foreach(i ${ARGN})
+        set(k pkg-config_${i})
+        if(NOT ${${k}_FOUND})
             message(FATAL_ERROR "Can't find '${i}'. Please install development files for this package.")
         endif()
     endforeach()
-- 
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