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Description: Build googletest along with the opentelemetry-cpp code
Using the precompiled shared libraries is not recommended, as for
opentelemetry-cpp, some tests end up failing.
Bug: https://github.com/open-telemetry/opentelemetry-cpp/issues/3267
Forwarded: https://github.com/open-telemetry/opentelemetry-cpp/pull/3290/
Author: Santiago Ruano Rincón <santiago@freexian.com>
Last-Update: 2025-03-04
Index: opentelemetry-cpp/CMakeLists.txt
===================================================================
--- opentelemetry-cpp.orig/CMakeLists.txt
+++ opentelemetry-cpp/CMakeLists.txt
@@ -613,19 +613,8 @@ list(APPEND CMAKE_PREFIX_PATH "${CMAKE_B
include(CTest)
if(BUILD_TESTING)
- if(EXISTS ${CMAKE_BINARY_DIR}/lib/libgtest.a)
- # Prefer GTest from build tree. GTest is not always working with
- # CMAKE_PREFIX_PATH
- set(GTEST_INCLUDE_DIRS
- ${CMAKE_CURRENT_SOURCE_DIR}/third_party/googletest/googletest/include
- ${CMAKE_CURRENT_SOURCE_DIR}/third_party/googletest/googlemock/include)
- if(TARGET gtest)
- set(GTEST_BOTH_LIBRARIES gtest gtest_main)
- else()
- set(GTEST_BOTH_LIBRARIES ${CMAKE_BINARY_DIR}/lib/libgtest.a
- ${CMAKE_BINARY_DIR}/lib/libgtest_main.a)
- endif()
- elseif(WIN32)
+
+ if(WIN32)
# Make sure we are always bootsrapped with vcpkg on Windows
find_package(GTest)
if(NOT (GTEST_FOUND OR GTest_FOUND))
@@ -641,9 +630,81 @@ if(BUILD_TESTING)
endif()
endif()
else()
- # Prefer GTest installed by OS distro, brew or vcpkg package manager
- find_package(GTest REQUIRED)
+ # Build googletest from sources. This is the preferred way.
+ set(GTEST_SRC_DIR_DEFAULT ${CMAKE_SOURCE_DIR}/third_party/googletest)
+ set(GTEST_SRC_DIR ${GTEST_SRC_DIR_DEFAULT} CACHE STRING "Location of gtest sources")
+ if(EXISTS ${GTEST_SRC_DIR}/googletest/src/gtest-all.cc)
+
+ include(ExternalProject)
+
+ # Build googletest/googletest from sources available as third party
+ ExternalProject_Add(
+ googletest
+ DOWNLOAD_COMMAND ""
+ SOURCE_DIR ${GTEST_SRC_DIR}/googletest
+ INSTALL_COMMAND ""
+ LOG_CONFIGURE ON
+ LOG_BUILD ON
+ CMAKE_ARGS -DBUILD_SHARED_LIBS=ON
+ -DCMAKE_POSITION_INDEPENDENT_CODE=ON
+ #BUILD_BYPRODUCTS
+ #${CMAKE_BINARY_DIR}/googletest-prefix/src/googletest-build/lib/libgtest.so
+ #${CMAKE_BINARY_DIR}/googletest-prefix/src/googletest-build/lib/libgtest_main.so
+ )
+ message(STATUS "Building googletest from sources in ${GTEST_SRC_DIR}")
+
+ set(GTEST_LIBRARY_PATH ${CMAKE_BINARY_DIR}/googletest-prefix/src/googletest-build/lib/libgtest.so)
+ add_library(GTest::gtest SHARED IMPORTED)
+ set_target_properties(GTest::gtest PROPERTIES IMPORTED_LOCATION
+ ${GTEST_LIBRARY_PATH})
+ add_dependencies(GTest::gtest googletest)
+
+ set(GTEST_MAIN_LIBRARY_PATH ${CMAKE_BINARY_DIR}/googletest-prefix/src/googletest-build/lib/libgtest_main.so)
+ add_library(GTest::gtest_main SHARED IMPORTED)
+ set_target_properties(GTest::gtest_main PROPERTIES IMPORTED_LOCATION
+ ${GTEST_MAIN_LIBRARY_PATH})
+ add_dependencies(GTest::gtest_main googletest)
+
+ ExternalProject_Get_Property(googletest source_dir)
+ set(GTEST_INCLUDE_DIR ${source_dir}/include)
+
+ # Build googletest/googlemock from sources available as third party
+ ExternalProject_Add(
+ googlemock
+ DOWNLOAD_COMMAND ""
+ SOURCE_DIR ${GTEST_SRC_DIR}/googlemock
+ INSTALL_COMMAND ""
+ LOG_CONFIGURE ON
+ LOG_BUILD ON
+ CMAKE_ARGS -DBUILD_SHARED_LIBS=ON
+ -DCMAKE_POSITION_INDEPENDENT_CODE=ON
+ )
+ message(STATUS "Building googlemock from sources in ${GTEST_SRC_DIR}")
+
+ set(GMOCK_LIBRARY_PATH ${CMAKE_BINARY_DIR}/googlemock-prefix/src/googlemock-build/lib/libgmock.so)
+ add_library(GTest::gmock SHARED IMPORTED)
+ set_target_properties(GTest::gmock PROPERTIES IMPORTED_LOCATION
+ ${GMOCK_LIBRARY_PATH})
+ add_dependencies(GTest::gmock googlemock)
+
+ set(GMOCK_MAIN_LIBRARY_PATH ${CMAKE_BINARY_DIR}/googlemock-prefix/src/googlemock-build/lib/libgmock_main.so)
+ add_library(GTest::gmock_main SHARED IMPORTED)
+ set_target_properties(GTest::gmock_main PROPERTIES IMPORTED_LOCATION
+ ${GMOCK_MAIN_LIBRARY_PATH})
+ add_dependencies(GTest::gtest_main googlemock)
+
+ set(GTEST_INCLUDE_DIRS
+ ${CMAKE_CURRENT_SOURCE_DIR}/third_party/googletest/googletest/include
+ ${CMAKE_CURRENT_SOURCE_DIR}/third_party/googletest/googlemock/include)
+
+ set(GTEST_BOTH_LIBRARIES GTest::gtest_main GTest::gtest)
+ set(GMOCK_LIB GTest::gmock)
+
+ else()
+ message(FATAL_ERROR "UNIT_TEST is set but unable to find gtest library source code")
+ endif()
endif()
+
if(NOT GTEST_BOTH_LIBRARIES)
# New GTest package names
if(TARGET GTest::gtest)
@@ -657,6 +718,11 @@ if(BUILD_TESTING)
endif()
message(STATUS "GTEST_INCLUDE_DIRS = ${GTEST_INCLUDE_DIRS}")
message(STATUS "GTEST_BOTH_LIBRARIES = ${GTEST_BOTH_LIBRARIES}")
+ message(STATUS "gtest library path ${GTEST_LIBRARY_PATH}")
+ message(STATUS "gtest main library path ${GTEST_MAIN_LIBRARY_PATH}")
+ message(STATUS "GMOCK_LIB = ${GMOCK_LIB}")
+ message(STATUS "gmock library path ${GMOCK_LIBRARY_PATH}")
+ message(STATUS "gmock main library path ${GMOCK_MAIN_LIBRARY_PATH}")
# Try to find gmock
if(NOT GMOCK_LIB AND TARGET GTest::gmock)
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