Fix cmake compilation issue

components/core/CMakeLists.txt

@@ -49,15 +49,19 @@ if (IS_BIG_ENDIAN)
     message(FATAL_ERROR "Big-endian machines are not supported")
 endif()
 
+if (NOT DEFINED CLP_USE_EXACT_PINNED_LIB_VERSION)
+    set(CLP_USE_EXACT_PINNED_LIB_VERSION ON)
+endif()
+
 # Detect linking mode (static or shared); Default to static.
 set(CLP_USE_STATIC_LIBS ON CACHE BOOL "Whether to link against static libraries")
 if (CLP_USE_STATIC_LIBS AND APPLE)
     message(AUTHOR_WARNING "Building with static libraries is unsupported on macOS."
             " Switching to shared libraries.")
     set(CLP_USE_STATIC_LIBS OFF)
-    message(AUTHOR_WARNING "Use the system libraries for building,
+    message(AUTHOR_WARNING "Use the system provided library version for building,
     as library version pinning is not supported on macOS.")
-    set(CLP_USE_SYSTEM_LIBS ON)
+    set(CLP_USE_EXACT_PINNED_LIB_VERSION OFF)
 endif ()
     if(CLP_USE_STATIC_LIBS)
         set(CLP_LIBS_STRING "static")
@@ -102,14 +106,12 @@ endif()
 # NOTE:
 # - We only try to link to the static library
 # - spdlog uses fmt, so their versions need to be kept in-sync
-if (CLP_USE_SYSTEM_LIBS)
-    # - Attempt to use a compatible version of fmt;
-    #   it is the user's responsibility to install the appropriate fmt library version.
-    find_package(fmt 8.0.1 REQUIRED)
+if(CLP_USE_EXACT_PINNED_LIB_VERSION)
+    set(FIND_FMT_PACKAGE_ARGS 8.0.1 EXACT REQUIRED)
 else()
-    # - spdlog uses fmt, so their versions need to be kept in-sync
-    find_package(fmt 8.0.1 EXACT REQUIRED)
+    set(FIND_FMT_PACKAGE_ARGS 8.0.1 REQUIRED)
 endif()
+find_package(fmt ${FIND_FMT_PACKAGE_ARGS})
 if(fmt_FOUND)
     message(STATUS "Found fmt ${fmt_VERSION}")
 else()
@@ -124,13 +126,12 @@ if(CLP_USE_STATIC_LIBS)
     # source.
     set(spdlog_USE_STATIC_LIBS ON)
 endif()
-if (CLP_USE_SYSTEM_LIBS)
-    # - Attempt to use a compatible version of spdlog;
-    #   it is the user's responsibility to install the appropriate spdlog library version.
-    find_package(spdlog 1.9.2 REQUIRED)
+if(CLP_USE_EXACT_PINNED_LIB_VERSION)
+    set(FIND_SPDLOG_PACKAGE_ARGS 1.9.2 EXACT REQUIRED)
 else()
-    # - spdlog uses fmt, so their versions need to be kept in-sync
-    find_package(spdlog 1.9.2 EXACT REQUIRED)
+    set(FIND_SPDLOG_PACKAGE_ARGS 1.9.2 REQUIRED)
+endif()
+find_package(spdlog ${FIND_SPDLOG_PACKAGE_ARGS})
 if(spdlog_FOUND)
     message(STATUS "Found spdlog ${spdlog_VERSION}")
 else()