feat!: bump C++ standard to C++23

Author: edubart

.clang-format

@@ -16,4 +16,4 @@ ConstructorInitializerAllOnOneLineOrOnePerLine: true
 IndentCaseLabels: true
 IndentWidth: 4
 SpaceAfterCStyleCast: true
-Standard: c++20
+Standard: Latest

README.md

@@ -116,7 +116,7 @@ brew install cartesi-machine
 
 ##### System Requirements
 
-- C++ Compiler with support for C++20 (tested with GCC >= 11.x and Clang >= 14.x).
+- C++ Compiler with support for C++23 (tested with GCC >= 14.x and Clang >= 19.x).
 - GNU Make >= 3.81
 - Boost >= 1.83
 - Lua >= 5.4.6 (optional, required for scripting support and interactive terminal)

src/Makefile

@@ -311,7 +311,7 @@ else
 DEFS+=-DNO_THREADS
 endif
 
-CXXFLAGS+=$(OPTFLAGS) -std=gnu++20 -fvisibility=hidden -MMD $(PICCFLAGS) $(CC_MARCH) $(INCS) $(GCFLAGS) $(UBCFLAGS) $(DEFS) $(CXX_WARNS)
+CXXFLAGS+=$(OPTFLAGS) -std=gnu++23 -fvisibility=hidden -MMD $(PICCFLAGS) $(CC_MARCH) $(INCS) $(GCFLAGS) $(UBCFLAGS) $(DEFS) $(CXX_WARNS)
 CFLAGS+=$(OPTFLAGS) -std=gnu99 -fvisibility=hidden -MMD $(PICCFLAGS) $(CC_MARCH) $(INCS) $(GCFLAGS) $(UBCFLAGS) $(DEFS) $(C_WARNS)
 LDFLAGS+=$(UBLDFLAGS)
 

tests/machine/README.md

@@ -6,7 +6,7 @@ The Cartesi Machine Tests is a repository containing RISC-V testing code.
 
 ### Requirements
 
-- RISCV64 C/C++ Compiler with support for C++20 (tested with GCC >= 8+).
+- RISCV64 C/C++ Compiler with support for C++23 (tested with GCC >= 14.x).
 - GNU Make >= 3.81
 
 ### Build

tests/misc/Makefile

@@ -98,7 +98,7 @@ CLANG_FORMAT_FILES:=$(wildcard *.cpp) $(wildcard *.h)
 INCS=-I../../src -I../../third-party/nlohmann-json -I../../third-party/downloads
 WARNS=-Wall -Wpedantic $(BOOST_INC)
 
-CXXFLAGS+=-O2 -g -std=gnu++20 -fopenmp -fvisibility=hidden $(INCS) $(UBFLAGS) $(WARNS)
+CXXFLAGS+=-O2 -g -std=gnu++23 -fopenmp -fvisibility=hidden $(INCS) $(UBFLAGS) $(WARNS)
 
 ifeq ($(slirp),yes)
 LIBCARTESI_LIBS+=$(SLIRP_LIB)

uarch/Makefile

@@ -21,7 +21,7 @@ HOST_CXX := g++
 HOST_CC := gcc
 endif
 HOST_CFLAGS := -I$(EMULATOR_SRC_DIR)
-HOST_CXXFLAGS := -std=c++20
+HOST_CXXFLAGS := -std=c++23
 
 CC := $(TOOLCHAIN_PREFIX)gcc
 LD := $(TOOLCHAIN_PREFIX)ld
@@ -58,7 +58,7 @@ CFLAGS := -march=rv64i -mabi=lp64 -Wl,--gc-sections $(OPTFLAGS) $(UBFLAGS) $(WAR
 	$(UARCH_DEFS) \
 	$(TOOLCHAIN_INCS)
 
-CXXFLAGS := -std=c++20 -fno-rtti \
+CXXFLAGS := -std=c++23 -fno-rtti \
 	-fno-threadsafe-statics \
 	-fno-use-cxa-atexit