Link libcJSON against libm

fixes #6147

diff --git a/third-party/cJSON/CMakeLists.txt b/third-party/cJSON/CMakeLists.txt
index e35889d2db4b1d584b5a9b07b02bce1f3c3ff83b..bc3f7aaa0383351221cfa1ddf26d78cf40986f1a 100644 (file)
--- a/third-party/cJSON/CMakeLists.txt
+++ b/third-party/cJSON/CMakeLists.txt
@@ -23,6 +23,10 @@ set_target_properties (
   FOLDER Lib
 )
 
+if(UNIX)
+    target_link_libraries(cJSON m)
+endif()
+
 install(
   TARGETS cJSON
   RUNTIME DESTINATION ${CMAKE_INSTALL_SBINDIR}