Fixes libretro NSwitch build (#2891)

Author: imsys

cmake/nswitch.cmake

@@ -10,23 +10,25 @@ if(NINTENDO_SWITCH)
             PRIVATE ${TIC80LIB_DIR}/studio)
     endif()
 
-    target_sources(${TIC80_TARGET} PRIVATE
-        src/system/nswitch/runtime.c)
-
-    find_package(PkgConfig)
-    pkg_search_module(CURL libcurl IMPORTED_TARGET)
-    target_link_libraries(tic80 PkgConfig::CURL)
-
-    nx_generate_nacp(tic80.nacp
-        NAME    "TIC-80 tiny computer"
-        AUTHOR  "Nesbox, carstene1ns"
-        VERSION ${PROJECT_VERSION})
-
-    nx_create_nro(${TIC80_TARGET}
-        NACP   tic80.nacp
-        ICON   ${CMAKE_SOURCE_DIR}/build/nswitch/icon.jpg
-        #ROMFS  ${CMAKE_SOURCE_DIR}/build/nswitch/romfs
-        OUTPUT ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/tic80.nro)
-
-    dkp_target_generate_symbol_list(${TIC80_TARGET})
+    if(NOT ${BUILD_LIBRETRO})
+        target_sources(${TIC80_TARGET} PRIVATE
+            src/system/nswitch/runtime.c)
+    
+        find_package(PkgConfig)
+        pkg_search_module(CURL libcurl IMPORTED_TARGET)
+        target_link_libraries(tic80 PkgConfig::CURL)
+    
+        nx_generate_nacp(tic80.nacp
+            NAME    "TIC-80 tiny computer"
+            AUTHOR  "Nesbox, carstene1ns"
+            VERSION ${PROJECT_VERSION})
+    
+        nx_create_nro(${TIC80_TARGET}
+            NACP   tic80.nacp
+            ICON   ${CMAKE_SOURCE_DIR}/build/nswitch/icon.jpg
+            #ROMFS  ${CMAKE_SOURCE_DIR}/build/nswitch/romfs
+            OUTPUT ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/tic80.nro)
+    
+        dkp_target_generate_symbol_list(${TIC80_TARGET})
+    endif()
 endif()