Try setting Cmake's INSTALL_NAME_DIR

Author: SeanCurtis-TRI

.github/workflows/generic_ci.yml

@@ -35,7 +35,7 @@ jobs:
         run: mkdir ${{github.workspace}}/build
 
       - name: Configure CMake
-        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=${{ inputs.build }} -DFCL_TREAT_WARNINGS_AS_ERRORS=ON -DFCL_COVERALLS=OFF -DCMAKE_MACOSX_RPATH=/usr/lib
+        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=${{ inputs.build }} -DFCL_TREAT_WARNINGS_AS_ERRORS=ON -DFCL_COVERALLS=OFF -DCMAKE_INSTALL_NAME_DIR=/usr/local/lib
 
       - name: Build
         run: cmake --build build -j2

src/CMakeLists.txt

@@ -54,6 +54,11 @@ set_target_properties(${PROJECT_NAME} PROPERTIES
   VERSION ${FCL_VERSION}
   SOVERSION ${FCL_ABI_VERSION})
 
+if (not UNIX)
+  set_target_properties(${PROJECT_NAME} PROPERTIES
+    INSTALL_NAME_DIR "@rpath")
+endif()
+
 # Hide symbols by default
 #################################################
 # Macro to check for visibility capability in compiler