Apply LTS transformations for 20250512 LTS branch (#1886)

* Apply LTS transformations for 20250512 LTS branch

* Cherry-pick https://github.com/google/cctz/commit/306fd9b37247a72145ca3f39e59203fb7dfcc890

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a31c6a9..8d3059d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,8 +23,8 @@
   cmake_policy(SET CMP0141 NEW)
 endif (POLICY CMP0141)
 
-project(absl LANGUAGES CXX)
-set(ABSL_SOVERSION 0)
+project(absl LANGUAGES CXX VERSION 20250512)
+set(ABSL_SOVERSION "2505.0.0")
 include(CTest)
 
 # Output directory is correct by default for most build setups. However, when
@@ -170,17 +170,7 @@
 add_subdirectory(absl)
 
 if(ABSL_ENABLE_INSTALL)
-  # absl:lts-remove-begin(system installation is supported for LTS releases)
-  # We don't support system-wide installation
-  list(APPEND SYSTEM_INSTALL_DIRS "/usr/local" "/usr" "/opt/" "/opt/local" "c:/Program Files/${PROJECT_NAME}")
-  if(NOT DEFINED CMAKE_INSTALL_PREFIX OR CMAKE_INSTALL_PREFIX IN_LIST SYSTEM_INSTALL_DIRS)
-    message(WARNING "\
-  The default and system-level install directories are unsupported except in LTS \
-  releases of Abseil.  Please set CMAKE_INSTALL_PREFIX to install Abseil in your \
-  source or build tree directly.\
-    ")
-  endif()
-  # absl:lts-remove-end
+  
 
   # install as a subdirectory only
   install(EXPORT ${PROJECT_NAME}Targets

MODULE.bazel

diff --git a/MODULE.bazel b/MODULE.bazel
index 29e624a..10fc31b 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -16,7 +16,7 @@
 
 module(
     name = "abseil-cpp",
-    version = "head",
+    version = "20250512.0",
     compatibility_level = 1,
 )
 

absl/base/config.h

diff --git a/absl/base/config.h b/absl/base/config.h
index f3cafbd..9170a6f 100644
--- a/absl/base/config.h
+++ b/absl/base/config.h
@@ -117,8 +117,8 @@
 //
 // LTS releases can be obtained from
 // https://github.com/abseil/abseil-cpp/releases.
-#undef ABSL_LTS_RELEASE_VERSION
-#undef ABSL_LTS_RELEASE_PATCH_LEVEL
+#define ABSL_LTS_RELEASE_VERSION 20250512
+#define ABSL_LTS_RELEASE_PATCH_LEVEL 0
 
 // Helper macro to convert a CPP variable to a string literal.
 #define ABSL_INTERNAL_DO_TOKEN_STR(x) #x

absl/base/options.h

diff --git a/absl/base/options.h b/absl/base/options.h
index 71bafb3..f904f64 100644
--- a/absl/base/options.h
+++ b/absl/base/options.h
@@ -148,8 +148,8 @@
 // be changed to a new, unique identifier name.  In particular "head" is not
 // allowed.
 
-#define ABSL_OPTION_USE_INLINE_NAMESPACE 0
-#define ABSL_OPTION_INLINE_NAMESPACE_NAME head
+#define ABSL_OPTION_USE_INLINE_NAMESPACE 1
+#define ABSL_OPTION_INLINE_NAMESPACE_NAME lts_20250512
 
 // ABSL_OPTION_HARDENED
 //

absl/time/internal/cctz/src/time_zone_lookup.cc

diff --git a/absl/time/internal/cctz/src/time_zone_lookup.cc b/absl/time/internal/cctz/src/time_zone_lookup.cc
index f791797..90b2972 100644
--- a/absl/time/internal/cctz/src/time_zone_lookup.cc
+++ b/absl/time/internal/cctz/src/time_zone_lookup.cc
@@ -57,6 +57,8 @@
 #endif  // __has_include
 #endif  // _WIN32
 
+#include <array>
+#include <cstdint>
 #include <cstdlib>
 #include <cstring>
 #include <string>
@@ -121,25 +123,25 @@
     return "";
   }
 
-  UChar buffer[128];
+  std::array<UChar, 128> buffer;
   UErrorCode status = U_ZERO_ERROR;
   const auto num_chars_in_buffer = ucal_getTimeZoneIDForWindowsIDFunc(
-      reinterpret_cast<const UChar*>(info.TimeZoneKeyName), -1, nullptr, buffer,
-      ARRAYSIZE(buffer), &status);
+      reinterpret_cast<const UChar*>(info.TimeZoneKeyName), -1, nullptr,
+      buffer.data(), static_cast<int32_t>(buffer.size()), &status);
   if (status != U_ZERO_ERROR || num_chars_in_buffer <= 0 ||
-      num_chars_in_buffer > ARRAYSIZE(buffer)) {
+      num_chars_in_buffer > static_cast<int32_t>(buffer.size())) {
     return "";
   }
 
   const int num_bytes_in_utf8 = ::WideCharToMultiByte(
-      CP_UTF8, 0, reinterpret_cast<const wchar_t*>(buffer),
+      CP_UTF8, 0, reinterpret_cast<const wchar_t*>(buffer.data()),
       static_cast<int>(num_chars_in_buffer), nullptr, 0, nullptr, nullptr);
   std::string local_time_str;
   local_time_str.resize(static_cast<size_t>(num_bytes_in_utf8));
-  ::WideCharToMultiByte(CP_UTF8, 0, reinterpret_cast<const wchar_t*>(buffer),
-                        static_cast<int>(num_chars_in_buffer),
-                        &local_time_str[0], num_bytes_in_utf8, nullptr,
-                        nullptr);
+  ::WideCharToMultiByte(
+       CP_UTF8, 0, reinterpret_cast<const wchar_t*>(buffer.data()),
+       static_cast<int>(num_chars_in_buffer), &local_time_str[0],
+       num_bytes_in_utf8, nullptr, nullptr);
   return local_time_str;
 }
 #endif  // USE_WIN32_LOCAL_TIME_ZONE