Update dependencies: absl, protobuf, cel_cpp, re2

This updates:

- absl from 20240722.0 to 20260107.0
- protobuf from 29.2 to 32.1
- cel_cpp from 0.11.0 to 0.14.0
- re2 from 2024-04-01 to 2025-11-05

The default standalone CMake C++ version is downgraded to C++17, with
C++20  only being used for targets that actually need it. This is due
to a bug in protobuf v30+ on MSVC:
protocolbuffers/protobuf#21310
It doesn't have any impact in any other situation, and doesn't change
anything when protovalidate-cc is used as a subproject. It does enable
using protovalidate-cc as a subproject in an otherwise C++-17 project.

The cel-cpp patch is reduced, since a lot of my previous patches were
upstreamed since the last release. I still don't have a proper solution
to the constinit problem, so that's still there.

The re2 patch is removed. Google finally actually did resolve the
problem with not having an option to control the re2 install targets
with CMake. Coincidentally, it uses the same variable name I already
used, so no adjustments are needed.

All of these dependencies pretty much need to be updated together.
They're updated to the latest available versions with the exception of
protobuf, since v33 seems to fail to compile for reasons I have not
figured out yet. It can't be held behind since v29 can't compile with a
newer version of absl, but cel_cpp requires a newer version of absl. re2
has to be updated for the same reason.

Author: jchv

CMakeLists.txt

@@ -17,7 +17,7 @@ if(NOT CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
     option(PROTOVALIDATE_CC_ENABLE_CONFORMANCE "Build conformance runner" OFF)
 else()
     # Only set C++ standard when not being embedded
-    set(CMAKE_CXX_STANDARD 20)
+    set(CMAKE_CXX_STANDARD 17)
     set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
     # Standalone: set appropriate defaults for system-wide installation
@@ -73,7 +73,7 @@ set(PROTOVALIDATE_CC_TEST_SOURCES
 list(FILTER PROTOVALIDATE_CC_TEST_SOURCES INCLUDE REGEX ".*_test\\.cc$")
 list(FILTER PROTOVALIDATE_CC_CORE_SOURCES EXCLUDE REGEX ".*_test\\.cc$")
 add_library(protovalidate_cc ${PROTOVALIDATE_CC_CORE_SOURCES} ${PROTOVALIDATE_CC_CORE_HEADERS})
-target_compile_features(protovalidate_cc PUBLIC cxx_std_17)
+target_compile_features(protovalidate_cc PUBLIC cxx_std_20)
 target_link_libraries(protovalidate_cc PUBLIC ${PROTOVALIDATE_LIBS})
 target_include_directories(protovalidate_cc PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>

MODULE.bazel

@@ -19,18 +19,18 @@ module(
     version = "0.0.0",
 )
 
-bazel_dep(name = "re2", version = "2024-07-02.bcr.1", repo_name = "com_googlesource_code_re2")
+bazel_dep(name = "re2", version = "2025-11-05.bcr.1", repo_name = "com_googlesource_code_re2")
 
-bazel_dep(name = "protobuf", version = "29.2", repo_name = "com_google_protobuf")
+bazel_dep(name = "protobuf", version = "32.1", repo_name = "com_google_protobuf")
 
 bazel_dep(name = "rules_proto", version = "7.1.0")
 
 bazel_dep(name = "rules_buf", version = "0.3.0")
 
 bazel_dep(name = "googletest", version = "1.16.0.bcr.1", repo_name = "com_google_googletest")
 
-bazel_dep(name = "abseil-cpp", version = "20240722.0", repo_name = "com_google_absl")
+bazel_dep(name = "abseil-cpp", version = "20260107.0", repo_name = "com_google_absl")
 
-bazel_dep(name = "cel-cpp", version = "0.11.0", repo_name = "com_google_cel_cpp")
+bazel_dep(name = "cel-cpp", version = "0.14.0", repo_name = "com_google_cel_cpp")
 
 bazel_dep(name = "protovalidate", version = "1.0.0", repo_name = "com_github_bufbuild_protovalidate")

MODULE.bazel.tmpl

@@ -19,7 +19,7 @@ module(
     version = "0.0.0",
 )
 
-bazel_dep(name = "re2", version = "2024-07-02.bcr.1", repo_name = "com_googlesource_code_re2")
+bazel_dep(name = "re2", version = "2025-11-05.bcr.1", repo_name = "com_googlesource_code_re2")
 
 bazel_dep(name = "protobuf", version = "{{protobuf.meta.version}}", repo_name = "com_google_protobuf")
 

cmake/Deps.cmake

@@ -218,16 +218,11 @@ else()
                 message(FATAL_ERROR "protovalidate-cc: Installation can not be enabled when using vendored re2. Install re2 system-wide, or disable installation using -DPROTOVALIDATE_CC_ENABLE_INSTALL=OFF.")
             endif()
             message(STATUS "protovalidate-cc: Fetching re2")
-            set(RE2_PATCHES
-                ${CMAKE_CURRENT_SOURCE_DIR}/deps/patches/re2/0001-Add-RE2_INSTALL-option.patch
-            )
-            MakePatchCommand(RE2_PATCH_COMMAND "${RE2_PATCHES}")
             FetchContent_Declare(
                 re2
                 GIT_REPOSITORY "https://github.com/google/re2.git"
-                GIT_TAG "2024-04-01"
+                GIT_TAG "2025-11-05"
                 GIT_SHALLOW TRUE
-                PATCH_COMMAND ${RE2_PATCH_COMMAND}
             )
             set(RE2_INSTALL OFF)
             FetchContent_MakeAvailable(re2)
@@ -284,7 +279,7 @@ FetchContent_Declare(cel_cpp
     URL_HASH SHA256=${PROTOVALIDATE_CC_CEL_CPP_SHA256}
     PATCH_COMMAND ${CEL_CPP_PATCH_COMMAND}
 
-    # THis stops MakeAvailable from trying to add_subdirectory, so we can do it
+    # This stops MakeAvailable from trying to add_subdirectory, so we can do it
     # ourselves after adding the embedded CMakeLists.txt.
     SOURCE_SUBDIR nonexistant
 )
@@ -299,7 +294,7 @@ file(COPY_FILE
 )
 message(STATUS "Added ${cel_cpp_SOURCE_DIR}/CMakeLists.txt")
 add_subdirectory(${cel_cpp_SOURCE_DIR} ${cel_cpp_BINARY_DIR})
-list(APPEND PROTOVALIDATE_CC_EXPORT_TARGETS 
+list(APPEND PROTOVALIDATE_CC_EXPORT_TARGETS
     cel_cpp
     cel_cpp_parser
     cel_cpp_minimal_descriptor_set

cmake/cel-cpp/CMakeLists.txt

@@ -288,6 +288,7 @@ target_include_directories(cel_cpp PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
     $<INSTALL_INTERFACE:include>
 )
+target_compile_features(cel_cpp PUBLIC cxx_std_20)
 target_compile_definitions(cel_cpp PRIVATE ANTLR4CPP_USING_ABSEIL)
 add_library(cel_cpp::cel_cpp ALIAS cel_cpp)