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-rw-r--r--cmake/tests.cmake7
1 files changed, 6 insertions, 1 deletions
diff --git a/cmake/tests.cmake b/cmake/tests.cmake
index d7522759..ec790e33 100644
--- a/cmake/tests.cmake
+++ b/cmake/tests.cmake
@@ -1,5 +1,10 @@
if (NOT EXISTS "${PROJECT_SOURCE_DIR}/../third_party/googletest/CMakeLists.txt")
- message(FATAL_ERROR "Cannot find third_party/googletest directory.")
+ message(FATAL_ERROR
+ "Cannot find third_party/googletest directory that's needed to "
+ "build tests. If you use git, make sure you have cloned submodules:\n"
+ " git submodule update --init --recursive\n"
+ "If instead you want to skip tests, run cmake with:\n"
+ " cmake -Dprotobuf_BUILD_TESTS=OFF\n")
endif()
option(protobuf_ABSOLUTE_TEST_PLUGIN_PATH