Fix Shared Cache Plugin out-of-tree build

view/sharedcache/CMakeLists.txt

@@ -2,11 +2,14 @@ cmake_minimum_required(VERSION 3.13 FATAL_ERROR)
 
 project(sharedcache)
 
-if((NOT BN_API_PATH) AND (NOT BN_INTERNAL_BUILD))
-    set(BN_API_PATH $ENV{BN_API_PATH} CACHE STRING "Path to Binary Ninja API source")
-    if(NOT BN_API_PATH)
-        message(FATAL_ERROR "Provide path to Binary Ninja API source in BN_API_PATH")
-    endif()
+if(NOT BN_INTERNAL_BUILD)
+    find_path(
+        BN_API_PATH
+        NAMES binaryninjaapi.h
+        HINTS ../../.. binaryninjaapi $ENV{BN_API_PATH}
+        REQUIRED
+    )
+    add_subdirectory(${BN_API_PATH} binaryninjaapi)
 endif()
 
 if (NOT BN_INTERNAL_BUILD)
@@ -105,4 +108,4 @@ message("
  ▒▒▓  ▒ ▒ ▒▓▒ ▒ ░░ ░▒ ▒  ░     Crash on Failure:      ${HARD_FAIL_MODE}
  ░ ▒  ▒ ░ ░▒  ░ ░  ░  ▒        Slideinfo Debug Tags:  ${SLIDEINFO_DEBUG_TAGS}
  ░ ░  ░ ░  ░  ░  ░             REFCOUNT_DEBUG:        ${BN_REF_COUNT_DEBUG}
-")
+")