ortools-clone/patches/abseil-cpp-20250814.1.patch

diff --git a/CMake/AbseilHelpers.cmake b/CMake/AbseilHelpers.cmake
index 624a3c7..dfe0680 100644
--- a/CMake/AbseilHelpers.cmake
+++ b/CMake/AbseilHelpers.cmake
@@ -326,7 +326,12 @@ Cflags: -I\${includedir}${PC_CFLAGS}\n")
       )
 
     if (_build_type STREQUAL "dll")
+      if (${_in_dll})
         set(ABSL_CC_LIB_DEPS abseil_dll)
+      endif()
+      if(${_in_test_dll})
+        set(ABSL_CC_LIB_DEPS abseil_test_dll)
+      endif()
     endif()
 
     target_link_libraries(${_NAME}
@@ -345,7 +350,7 @@ Cflags: -I\${includedir}${PC_CFLAGS}\n")
     endif()
   endif()
 
-  if(ABSL_ENABLE_INSTALL)
+  if(ABSL_ENABLE_INSTALL AND NOT ABSL_CC_LIB_TESTONLY)
     install(TARGETS ${_NAME} EXPORT ${PROJECT_NAME}Targets
           RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
           LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1e7c856..a3c3dae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -145,7 +145,7 @@ if((BUILD_TESTING AND ABSL_BUILD_TESTING) OR ABSL_BUILD_TEST_HELPERS)
         add_library(GTest::gmock ALIAS gmock)
         add_library(GTest::gmock_main ALIAS gmock_main)
       else()
-        message(FATAL_ERROR "ABSL_USE_EXTERNAL_GOOGLETEST is ON and ABSL_FIND_GOOGLETEST is OFF, which means that the top-level project must build the Google Test project. However, the target gtest was not found.")
+        message(WARNING "ABSL_USE_EXTERNAL_GOOGLETEST is ON and ABSL_FIND_GOOGLETEST is OFF, which means that the top-level project must build the Google Test project. However, the target gtest was not found.")
       endif()
     endif()
   else()
diff --git a/absl/flags/declare.h b/absl/flags/declare.h
index 8d2a856..a154046 100644
--- a/absl/flags/declare.h
+++ b/absl/flags/declare.h
@@ -59,10 +59,15 @@ ABSL_NAMESPACE_END
 
 // Internal implementation of ABSL_DECLARE_FLAG to allow macro expansion of its
 // arguments. Clients must use ABSL_DECLARE_FLAG instead.
+#if defined(_MSC_VER)
+#define ABSL_DECLARE_FLAG_INTERNAL(type, name) \
+  extern absl::Flag<type> FLAGS_##name
+#else
 #define ABSL_DECLARE_FLAG_INTERNAL(type, name)               \
   extern absl::Flag<type> FLAGS_##name;                      \
   namespace absl /* block flags in namespaces */ {}          \
   /* second redeclaration is to allow applying attributes */ \
   extern absl::Flag<type> FLAGS_##name
+#endif  // _MSC_VER
 
 #endif  // ABSL_FLAGS_DECLARE_H_