Update go.cmake to use PROJECT_SOURCE_DIR (#1484)

Update go.cmake to use PROJECT_SOURCE_DIR to enable customers to build AWS-LC as a CMake sub_directory. Resolves P120917801. CI check requires a copyright
aws · Mar 12, 2024 · a370181 · a370181
1 parent 22b1534
commit a370181
Showing 1 changed file with 27 additions and 12 deletions.
diff --git a/cmake/go.cmake b/cmake/go.cmake
@@ -1,3 +1,5 @@
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0 OR ISC
 if(ANDROID)
   # Android-NDK CMake files reconfigure the path and so Go won't be found.
   # However, ninja will still find them in $PATH if we just name them.
@@ -15,7 +17,7 @@ if(NOT GO_EXECUTABLE AND NOT DISABLE_GO)
 endif()
 
 function(go_executable dest package)
-  set(godeps "${CMAKE_SOURCE_DIR}/util/godeps.go")
+  set(godeps "${PROJECT_SOURCE_DIR}/util/godeps.go")
   if(NOT CMAKE_GENERATOR STREQUAL "Ninja")
     # The DEPFILE parameter to add_custom_command only works with Ninja. Query
     # the sources at configure time. Additionally, everything depends on go.mod.
@@ -32,7 +34,7 @@ function(go_executable dest package)
                        COMMAND ${GO_EXECUTABLE} build
                                -o ${CMAKE_CURRENT_BINARY_DIR}/${dest} ${package}
                        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-                       DEPENDS ${sources} ${CMAKE_SOURCE_DIR}/go.mod)
+                       DEPENDS ${sources} ${PROJECT_SOURCE_DIR}/go.mod)
   else()
     # Ninja expects the target in the depfile to match the output. This is a
     # relative path from the build directory.
@@ -41,15 +43,28 @@ function(go_executable dest package)
     string(SUBSTRING "${CMAKE_CURRENT_BINARY_DIR}" ${root_dir_length} -1 target)
     set(target "${target}/${dest}")
 
-    set(depfile "${CMAKE_CURRENT_BINARY_DIR}/${dest}.d")
-    add_custom_command(OUTPUT ${dest}
-                       COMMAND ${GO_EXECUTABLE} build
-                               -o ${CMAKE_CURRENT_BINARY_DIR}/${dest} ${package}
-                       COMMAND ${GO_EXECUTABLE} run ${godeps} -format depfile
-                               -target ${target} -pkg ${package} -out ${depfile}
-                       WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-                       DEPENDS ${godeps} ${CMAKE_SOURCE_DIR}/go.mod
-                       DEPFILE ${depfile})
+    if(CMAKE_VERSION VERSION_GREATER "3.19")
+      # Silences warning about CMP0116:
+      # https://cmake.org/cmake/help/latest/policy/CMP0116.html
+      cmake_policy(SET CMP0116 OLD)
+    endif()
+
+    if(CMAKE_VERSION VERSION_LESS "3.7")
+      add_custom_command(OUTPUT ${dest}
+                         COMMAND ${GO_EXECUTABLE} build
+                         -o ${CMAKE_CURRENT_BINARY_DIR}/${dest} ${package}
+                         WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+                         DEPENDS ${PROJECT_SOURCE_DIR}/go.mod)
+    else()
+      set(depfile "${CMAKE_CURRENT_BINARY_DIR}/${dest}.d")
+      add_custom_command(OUTPUT ${dest}
+                         COMMAND ${GO_EXECUTABLE} build
+                         -o ${CMAKE_CURRENT_BINARY_DIR}/${dest} ${package}
+                         COMMAND ${GO_EXECUTABLE} run ${godeps} -format depfile
+                         -target ${target} -pkg ${package} -out ${depfile}
+                         WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+                         DEPENDS ${godeps} ${PROJECT_SOURCE_DIR}/go.mod
+                         DEPFILE ${depfile})
+    endif()
   endif()
 endfunction()
-