Properly handle pkgconfig files on FreeBSD

Author: AMDmi3

CMakeLists.txt

@@ -165,6 +165,10 @@ if(SFML_OS_MACOSX)
 endif()
 
 if(SFML_OS_LINUX OR SFML_OS_FREEBSD)
+    set(PKGCONFIG_DIR lib${LIB_SUFFIX}/pkgconfig)
+    if(SFML_OS_FREEBSD)
+        set(PKGCONFIG_DIR libdata/pkgconfig)
+    endif()
     if(BUILD_SHARED_LIBS)
         sfml_set_option(SFML_INSTALL_PKGCONFIG_FILES FALSE BOOL "TRUE to automatically install pkg-config files so other projects can find SFML")
         if(SFML_INSTALL_PKGCONFIG_FILES)
@@ -174,7 +178,7 @@ if(SFML_OS_LINUX OR SFML_OS_FREEBSD)
                     "tools/pkg-config/sfml-${sfml_module}.pc"
                     @ONLY)
                 INSTALL(FILES "${CMAKE_CURRENT_BINARY_DIR}/tools/pkg-config/sfml-${sfml_module}.pc"
-                DESTINATION "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}/pkgconfig")
+                    DESTINATION "${CMAKE_INSTALL_PREFIX}/${PKGCONFIG_DIR}")
             endforeach()
         endif()
     else()