cmake: bump abseil-cpp to 20250814.1

Author: Mizux

cmake/dependencies/CMakeLists.txt

@@ -15,11 +15,11 @@ if(BUILD_absl)
   FetchContent_Declare(
     absl
     GIT_REPOSITORY "https://github.com/abseil/abseil-cpp.git"
-    GIT_TAG "20250814.0"
+    GIT_TAG "20250814.1"
     GIT_SHALLOW TRUE
     UPDATE_COMMAND git reset --hard
     PATCH_COMMAND git apply --ignore-whitespace
-    "${CMAKE_CURRENT_LIST_DIR}/../../patches/abseil-cpp-20250814.0.patch"
+    "${CMAKE_CURRENT_LIST_DIR}/../../patches/abseil-cpp-20250814.1.patch"
     OVERRIDE_FIND_PACKAGE
   )
   set(ABSL_USE_SYSTEM_INCLUDES ON)

patches/abseil-cpp-20250814.0.patch

@@ -0,0 +1,46 @@
+diff --git a/CMake/AbseilHelpers.cmake b/CMake/AbseilHelpers.cmake
+index 624a3c7..8d0493d 100644
+--- a/CMake/AbseilHelpers.cmake
++++ b/CMake/AbseilHelpers.cmake
+@@ -345,7 +345,7 @@ 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_