6 files changed, 126 insertions, 389 deletions
diff --git a/rcc/CMakeLists.txt b/rcc/CMakeLists.txt
index 3825e8a..1fb86a0 100644
--- a/rcc/CMakeLists.txt
+++ b/rcc/CMakeLists.txt
@@ -53,20 +53,15 @@ configure_file(
   "${RCC_MAIN_INCLUDE_DIR}/rcc/Config/rcc-config.h.cmake"
   "${RCC_INCLUDE_DIR}/rcc/Config/rcc-config.h")
 
-add_library(RCCHeaders INTERFACE)
-target_compile_features(RCCHeaders INTERFACE cxx_std_23)
-target_include_directories(RCCHeaders INTERFACE
-  "$<BUILD_INTERFACE:${RCC_SOURCE_DIR}/include>"
-  "$<BUILD_INTERFACE:${RCC_BINARY_DIR}/include>"
-  "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
-install(TARGETS RCCHeaders EXPORT RCCTargets)
 install(DIRECTORY include/rcc DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
   FILES_MATCHING PATTERN "*.h" PATTERN "*.inc" PATTERN "*.def")
-install(DIRECTORY "${RCC_BINARY_DIR}/include/rcc" DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+install(DIRECTORY "${RCC_BINARY_DIR}/include/rcc/Config" DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/rcc"
   FILES_MATCHING PATTERN "*.h" PATTERN "*.inc" PATTERN "*.def"
-  PATTERN "CMakeFiles" EXCLUDE PATTERN "config.h" EXCLUDE)
+  PATTERN "config.h" EXCLUDE)
 
-add_subdirectory("${RCC_SOURCE_DIR}/../libsupport" "${CMAKE_CURRENT_BINARY_DIR}/libsupport")
+set(RCC_LIBBASE_SOURCE_DIR "${RCC_SOURCE_DIR}/../libbase")
+set(RCC_LIBBASE_BINARY_DIR "${RCC_BINARY_DIR}/libbase")
+add_subdirectory("${RCC_LIBBASE_SOURCE_DIR}" "${RCC_LIBBASE_BINARY_DIR}")
 add_subdirectory(tools)
 foreach(rccProject IN LISTS RCC_ENABLE_PROJECTS)
   if(NOT rccProject STREQUAL "cfront")
diff --git a/rcc/cmake/modules/AddRCC.cmake b/rcc/cmake/modules/AddRCC.cmake
index 11bd92e..738df5f 100644
--- a/rcc/cmake/modules/AddRCC.cmake
+++ b/rcc/cmake/modules/AddRCC.cmake
@@ -162,7 +162,13 @@ endfunction()
 function(add_rcc_library name)
   cmake_parse_arguments(PARSE_ARGV 1 arg "DISABLE_PCH_REUSE;NO_INSTALL_RPATH" "" "LINK_LIBS;PRECOMPILE_HEADERS")
   add_library(${name} ${arg_UNPARSED_ARGUMENTS})
-  target_link_libraries(${name} PUBLIC RCCHeaders ${arg_LINK_LIBS})
+  target_link_libraries(${name} PUBLIC RCCCore ${arg_LINK_LIBS})
+  target_compile_features(${name} PUBLIC cxx_std_23)
+  target_compile_definitions(${name} PRIVATE RCC_EXPORTS)
+  target_include_directories(${name} PUBLIC
+    "$<BUILD_INTERFACE:${RCC_SOURCE_DIR}/include>"
+    "$<BUILD_INTERFACE:${RCC_BINARY_DIR}/include>"
+    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
   rcc_configure_target(${name})
   install(TARGETS ${name} EXPORT RCCTargets
     ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
@@ -173,7 +179,11 @@ endfunction()
 function(add_rcc_executable name)
   cmake_parse_arguments(PARSE_ARGV 1 arg "DISABLE_PCH_REUSE;NO_INSTALL_RPATH" "" "LINK_LIBS;PRECOMPILE_HEADERS")
   add_executable(${name} ${arg_UNPARSED_ARGUMENTS})
-  target_link_libraries(${name} PRIVATE RCCHeaders ${arg_LINK_LIBS})
+  target_link_libraries(${name} PRIVATE RCCCore ${arg_LINK_LIBS})
+  target_compile_features(${name} PRIVATE cxx_std_23)
+  target_include_directories(${name} PRIVATE
+    "${RCC_SOURCE_DIR}/include"
+    "${RCC_BINARY_DIR}/include")
   rcc_configure_target(${name})
 endfunction()
 
diff --git a/rcc/include/rcc/Config/config.h.cmake b/rcc/include/rcc/Config/config.h.cmake
index 32761c1..8830412 100644
--- a/rcc/include/rcc/Config/config.h.cmake
+++ b/rcc/include/rcc/Config/config.h.cmake
@@ -1,5 +1,5 @@
-#ifndef CONFIG_H
-#define CONFIG_H
+#ifndef RCC_PRIVATE_CONFIG_H
+#define RCC_PRIVATE_CONFIG_H
 
 // Include this header only under the rcc source tree.
 // This is a private header.
@@ -10,38 +10,6 @@
 /* Bug report URL. */
 #define BUG_REPORT_URL "${BUG_REPORT_URL}"
 
-/* Define to 1 to enable backtraces, and to 0 otherwise. */
-#cmakedefine01 ENABLE_BACKTRACES
-
-/* Define to 1 to enable crash overrides, and to 0 otherwise. */
-#cmakedefine01 ENABLE_CRASH_OVERRIDES
-
-/* Define to 1 to enable crash memory dumps, and to 0 otherwise. */
-#cmakedefine01 RCC_ENABLE_CRASH_DUMPS
-
-/* Define to 1 to prefer forward slashes on Windows, and to 0 prefer
-   backslashes. */
-#cmakedefine01 RCC_WINDOWS_PREFER_FORWARD_SLASH
-
-/* Define to 1 if you have the `backtrace' function. */
-#cmakedefine HAVE_BACKTRACE ${HAVE_BACKTRACE}
-
-#define BACKTRACE_HEADER <${BACKTRACE_HEADER}>
-
-/* can use __crashreporter_info__ */
-#cmakedefine01 HAVE_CRASHREPORTER_INFO
-
-/* Define to 1 if you have the declaration of `arc4random', and to 0 if you
-   don't. */
-#cmakedefine01 HAVE_DECL_ARC4RANDOM
-
-/* Define to 1 if you have the declaration of `strerror_s', and to 0 if you
-   don't. */
-#cmakedefine01 HAVE_DECL_STRERROR_S
-
-/* Define if dlopen() is available on this platform. */
-#cmakedefine HAVE_DLOPEN ${HAVE_DLOPEN}
-
 /* Define to 1 if we can register EH frames on this platform. */
 #cmakedefine HAVE_REGISTER_FRAME ${HAVE_REGISTER_FRAME}
 
@@ -60,177 +28,12 @@
 /* Define to 1 if you have the <ffi.h> header file. */
 #cmakedefine HAVE_FFI_H ${HAVE_FFI_H}
 
-/* Define to 1 if you have the `futimens' function. */
-#cmakedefine HAVE_FUTIMENS ${HAVE_FUTIMENS}
-
-/* Define to 1 if you have the `futimes' function. */
-#cmakedefine HAVE_FUTIMES ${HAVE_FUTIMES}
-
-/* Define to 1 if you have the `getpagesize' function. */
-#cmakedefine HAVE_GETPAGESIZE ${HAVE_GETPAGESIZE}
-
-/* Define to 1 if you have the `getrusage' function. */
-#cmakedefine HAVE_GETRUSAGE ${HAVE_GETRUSAGE}
-
-/* Define to 1 if you have the `isatty' function. */
-#cmakedefine HAVE_ISATTY 1
-
-/* Define to 1 if you have the `edit' library (-ledit). */
-#cmakedefine HAVE_LIBEDIT ${HAVE_LIBEDIT}
-
 /* Define to 1 if you have the `pfm' library (-lpfm). */
 #cmakedefine HAVE_LIBPFM ${HAVE_LIBPFM}
 
 /* Define to 1 if the `perf_branch_entry' struct has field cycles. */
 #cmakedefine LIBPFM_HAS_FIELD_CYCLES ${LIBPFM_HAS_FIELD_CYCLES}
 
-/* Define to 1 if you have the `psapi' library (-lpsapi). */
-#cmakedefine HAVE_LIBPSAPI ${HAVE_LIBPSAPI}
-
-/* Define to 1 if you have the `pthread' library (-lpthread). */
-#cmakedefine HAVE_LIBPTHREAD ${HAVE_LIBPTHREAD}
-
-/* Define to 1 if you have the `pthread_getname_np' function. */
-#cmakedefine HAVE_PTHREAD_GETNAME_NP ${HAVE_PTHREAD_GETNAME_NP}
-
-/* Define to 1 if you have the `pthread_setname_np' function. */
-#cmakedefine HAVE_PTHREAD_SETNAME_NP ${HAVE_PTHREAD_SETNAME_NP}
-
-/* Define to 1 if you have the `pthread_get_name_np' function. */
-#cmakedefine HAVE_PTHREAD_GET_NAME_NP ${HAVE_PTHREAD_GET_NAME_NP}
-
-/* Define to 1 if you have the `pthread_set_name_np' function. */
-#cmakedefine HAVE_PTHREAD_SET_NAME_NP ${HAVE_PTHREAD_SET_NAME_NP}
-
-/* Define to 1 if you have the <mach/mach.h> header file. */
-#cmakedefine HAVE_MACH_MACH_H ${HAVE_MACH_MACH_H}
-
-/* Define to 1 if you have the `mallctl' function. */
-#cmakedefine HAVE_MALLCTL ${HAVE_MALLCTL}
-
-/* Define to 1 if you have the `mallinfo' function. */
-#cmakedefine HAVE_MALLINFO ${HAVE_MALLINFO}
-
-/* Define to 1 if you have the `mallinfo2' function. */
-#cmakedefine HAVE_MALLINFO2 ${HAVE_MALLINFO2}
-
-/* Define to 1 if you have the <malloc/malloc.h> header file. */
-#cmakedefine HAVE_MALLOC_MALLOC_H ${HAVE_MALLOC_MALLOC_H}
-
-/* Define to 1 if you have the `malloc_zone_statistics' function. */
-#cmakedefine HAVE_MALLOC_ZONE_STATISTICS ${HAVE_MALLOC_ZONE_STATISTICS}
-
-/* Define to 1 if you have the `posix_spawn' function. */
-#cmakedefine HAVE_POSIX_SPAWN ${HAVE_POSIX_SPAWN}
-
-/* Define to 1 if you have the `pread' function. */
-#cmakedefine HAVE_PREAD ${HAVE_PREAD}
-
-/* Define to 1 if you have the <pthread.h> header file. */
-#cmakedefine HAVE_PTHREAD_H ${HAVE_PTHREAD_H}
-
-/* Have pthread_rwlock_init */
-#cmakedefine HAVE_PTHREAD_RWLOCK_INIT ${HAVE_PTHREAD_RWLOCK_INIT}
-
-/* Define to 1 if you have the `sbrk' function. */
-#cmakedefine HAVE_SBRK ${HAVE_SBRK}
-
-/* Define to 1 if you have the `setenv' function. */
-#cmakedefine HAVE_SETENV ${HAVE_SETENV}
-
-/* Define to 1 if you have the `sigaltstack' function. */
-#cmakedefine HAVE_SIGALTSTACK ${HAVE_SIGALTSTACK}
-
-/* Define to 1 if you have the `strerror_r' function. */
-#cmakedefine HAVE_STRERROR_R ${HAVE_STRERROR_R}
-
-/* Define to 1 if you have the `sysconf' function. */
-#cmakedefine HAVE_SYSCONF ${HAVE_SYSCONF}
-
-/* Define to 1 if you have the <sys/mman.h> header file. */
-#cmakedefine HAVE_SYS_MMAN_H ${HAVE_SYS_MMAN_H}
-
-/* Define to 1 if you have the <sys/ioctl.h> header file. */
-#cmakedefine HAVE_SYS_IOCTL_H ${HAVE_SYS_IOCTL_H}
-
-/* Define to 1 if stat struct has st_mtimespec member .*/
-#cmakedefine HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC ${HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC}
-
-/* Define to 1 if stat struct has st_mtim member. */
-#cmakedefine HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC ${HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC}
-
-/* Define to 1 if you have the <unistd.h> header file. */
-#cmakedefine HAVE_UNISTD_H ${HAVE_UNISTD_H}
-
-/* Have host's _alloca */
-#cmakedefine HAVE__ALLOCA ${HAVE__ALLOCA}
-
-/* Define to 1 if you have the `_chsize_s' function. */
-#cmakedefine HAVE__CHSIZE_S ${HAVE__CHSIZE_S}
-
-/* Define to 1 if you have the `_Unwind_Backtrace' function. */
-#cmakedefine HAVE__UNWIND_BACKTRACE ${HAVE__UNWIND_BACKTRACE}
-
-/* Have host's __alloca */
-#cmakedefine HAVE___ALLOCA ${HAVE___ALLOCA}
-
-/* Have host's __ashldi3 */
-#cmakedefine HAVE___ASHLDI3 ${HAVE___ASHLDI3}
-
-/* Have host's __ashrdi3 */
-#cmakedefine HAVE___ASHRDI3 ${HAVE___ASHRDI3}
-
-/* Have host's __chkstk */
-#cmakedefine HAVE___CHKSTK ${HAVE___CHKSTK}
-
-/* Have host's __chkstk_ms */
-#cmakedefine HAVE___CHKSTK_MS ${HAVE___CHKSTK_MS}
-
-/* Have host's __cmpdi2 */
-#cmakedefine HAVE___CMPDI2 ${HAVE___CMPDI2}
-
-/* Have host's __divdi3 */
-#cmakedefine HAVE___DIVDI3 ${HAVE___DIVDI3}
-
-/* Have host's __fixdfdi */
-#cmakedefine HAVE___FIXDFDI ${HAVE___FIXDFDI}
-
-/* Have host's __fixsfdi */
-#cmakedefine HAVE___FIXSFDI ${HAVE___FIXSFDI}
-
-/* Have host's __floatdidf */
-#cmakedefine HAVE___FLOATDIDF ${HAVE___FLOATDIDF}
-
-/* Have host's __lshrdi3 */
-#cmakedefine HAVE___LSHRDI3 ${HAVE___LSHRDI3}
-
-/* Have host's __main */
-#cmakedefine HAVE___MAIN ${HAVE___MAIN}
-
-/* Have host's __moddi3 */
-#cmakedefine HAVE___MODDI3 ${HAVE___MODDI3}
-
-/* Have host's __udivdi3 */
-#cmakedefine HAVE___UDIVDI3 ${HAVE___UDIVDI3}
-
-/* Have host's __umoddi3 */
-#cmakedefine HAVE___UMODDI3 ${HAVE___UMODDI3}
-
-/* Have host's ___chkstk */
-#cmakedefine HAVE____CHKSTK ${HAVE____CHKSTK}
-
-/* Have host's ___chkstk_ms */
-#cmakedefine HAVE____CHKSTK_MS ${HAVE____CHKSTK_MS}
-
-/* Define if ICU library is available */
-#cmakedefine01 HAVE_ICU
-
-/* Define if Windows vendored ICU is available */
-#cmakedefine01 HAVE_WINDOWS_ICU
-
-/* Define if iconv library is available */
-#cmakedefine01 HAVE_ICONV
-
 /* Linker version detected at compile time. */
 #cmakedefine HOST_LINK_VERSION "${HOST_LINK_VERSION}"
 
@@ -267,25 +70,13 @@
 /* Define to the vendor of this package. */
 #cmakedefine PACKAGE_VENDOR "${PACKAGE_VENDOR}"
 
-/* Define to a function implementing stricmp */
-#cmakedefine stricmp ${stricmp}
-
-/* Define to a function implementing strdup */
-#cmakedefine strdup ${strdup}
-
 /* Whether GlobalISel rule coverage is being collected */
 #cmakedefine01 RCC_GISEL_COV_ENABLED
 
 /* Define to the default GlobalISel coverage file prefix */
 #cmakedefine RCC_GISEL_COV_PREFIX "${RCC_GISEL_COV_PREFIX}"
 
-/* Whether Timers signpost passes in Xcode Instruments */
-#cmakedefine01 RCC_SUPPORT_XCODE_SIGNPOSTS
-
-#cmakedefine HAVE_PROC_PID_RUSAGE 1
-
+/* Have host's builtin thread pointer. */
 #cmakedefine HAVE_BUILTIN_THREAD_POINTER ${HAVE_BUILTIN_THREAD_POINTER}
 
-#cmakedefine HAVE_GETAUXVAL ${HAVE_GETAUXVAL}
-
 #endif
diff --git a/rcc/include/rcc/Config/rcc-config.h.cmake b/rcc/include/rcc/Config/rcc-config.h.cmake
index 9c0ba18..fb76d22 100644
--- a/rcc/include/rcc/Config/rcc-config.h.cmake
+++ b/rcc/include/rcc/Config/rcc-config.h.cmake
@@ -14,19 +14,10 @@
 #ifndef RCC_CONFIG_H
 #define RCC_CONFIG_H
 
-/* Define if RCC_ENABLE_DUMP is enabled */
-#cmakedefine RCC_ENABLE_DUMP
-
 /* Target triple RCC will generate code for by default */
 /* Doesn't use `cmakedefine` because it is allowed to be empty. */
 #define RCC_DEFAULT_TARGET_TRIPLE "${RCC_DEFAULT_TARGET_TRIPLE}"
 
-/* Define if threads enabled */
-#cmakedefine01 RCC_ENABLE_THREADS
-
-/* Has gcc/MSVC atomic intrinsics */
-#cmakedefine01 RCC_HAS_ATOMICS
-
 /* Host triple RCC will be executed on */
 #cmakedefine RCC_HOST_TRIPLE "${RCC_HOST_TRIPLE}"
 
@@ -54,9 +45,6 @@
 /* RCC name for the native target MCA init function, if available */
 #cmakedefine RCC_NATIVE_TARGETMCA RCCInitialize${RCC_NATIVE_ARCH}TargetMCA
 
-/* Define if this is Unixish platform */
-#cmakedefine RCC_ON_UNIX ${RCC_ON_UNIX}
-
 /* Define if we have the Intel JIT API runtime support library */
 #cmakedefine01 RCC_USE_INTEL_JITEVENTS
 
@@ -78,69 +66,24 @@
 /* RCC version string */
 #define RCC_VERSION_STRING "${PACKAGE_VERSION}"
 
-/* Whether RCC records statistics for use with GetStatistics(),
- * PrintStatistics() or PrintStatisticsJSON()
- */
-#cmakedefine01 RCC_FORCE_ENABLE_STATS
-
-/* Define if we have z3 and want to build it */
-#cmakedefine RCC_WITH_Z3 ${RCC_WITH_Z3}
-
-/* Define if we have curl and want to use it */
-#cmakedefine RCC_ENABLE_CURL ${RCC_ENABLE_CURL}
-
-/* Define if we have cpp-httplib and want to use it */
-#cmakedefine RCC_ENABLE_HTTPLIB ${RCC_ENABLE_HTTPLIB}
-
-/* Define if zlib compression is available */
-#cmakedefine01 RCC_ENABLE_ZLIB
-
-/* Define if zstd compression is available */
-#cmakedefine01 RCC_ENABLE_ZSTD
-
-/* Define if xz (lzma) decompression is available */
-#cmakedefine01 RCC_ENABLE_LZMA
-
 /* Define if RCC is using tflite */
 #cmakedefine RCC_HAVE_TFLITE
 
 /* Define if we want to check profile consistency in lit tests */
 #cmakedefine RCC_ENABLE_PROFCHECK
 
-/* Define to 1 if you have the <sysexits.h> header file. */
-#cmakedefine HAVE_SYSEXITS_H ${HAVE_SYSEXITS_H}
-
 /* Define if building libRCC shared library */
 #cmakedefine RCC_BUILD_RCC_DYLIB
 
-/* Define if building RCC with BUILD_SHARED_LIBS */
-#cmakedefine RCC_BUILD_SHARED_LIBS
-
-/* Define if exporting RCC public interface for shared library */
-#cmakedefine RCC_ENABLE_RCC_EXPORT_ANNOTATIONS
-
 /* Define if exporting RCC-C public interface for shared library */
 #cmakedefine RCC_ENABLE_RCC_C_EXPORT_ANNOTATIONS
 
-/* Define if building RCC with RCC_FORCE_USE_OLD_TOOLCHAIN_LIBS */
-#cmakedefine RCC_FORCE_USE_OLD_TOOLCHAIN ${RCC_FORCE_USE_OLD_TOOLCHAIN}
-
-/* Define if rcc_unreachable should be optimized with undefined behavior
- * in non assert builds */
-#cmakedefine01 RCC_UNREACHABLE_OPTIMIZE
-
-/* Define if building RCC with RCC_ENABLE_IO_SANDBOX */
-#cmakedefine01 RCC_ENABLE_IO_SANDBOX
-
 /* Define to 1 if you have the DIA SDK installed, and to 0 if you don't. */
 #cmakedefine01 RCC_ENABLE_DIA_SDK
 
 /* Define if plugins enabled */
 #cmakedefine RCC_ENABLE_PLUGINS
 
-/* Define if logf128 is available */
-#cmakedefine RCC_HAS_LOGF128
-
 /* Define if building RCC with RCC_ENABLE_TELEMETRY */
 #cmakedefine01 RCC_ENABLE_TELEMETRY
 
@@ -152,7 +95,4 @@
    coverage bugs, and to 0 otherwise. */
 #cmakedefine01 RCC_ENABLE_DEBUGLOC_TRACKING_ORIGIN
 
-/* Define to 1 to enable RCC OnDisk Content Addressable Storage */
-#cmakedefine01 RCC_ENABLE_ONDISK_CAS
-
 #endif
diff --git a/rcc/include/rcc/DataTypes.h b/rcc/include/rcc/DataTypes.h
deleted file mode 100644
index 59e9b75..0000000
--- a/rcc/include/rcc/DataTypes.h
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- RCC-Project
-
- Copyright (C) 2026 Richard Qin
-
- This file is part of RCC-Project.
-
- RCC-Project is free software; you can redistribute it and/or modify it under
- the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 3, or (at your option) any later
- version.
-
- RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- for more details.
-
-You should have received a copy of the GNU General Public License
-along with RCC-Project; see the file COPYING. If not see
-<http://www.gnu.org/licenses/>.
-*/
-
-// This implementation is based on include/llvm-c/DataTypes.h
-/*===-- include/llvm-c/DataTypes.h - Define fixed size types ------*- C -*-===*\
- | * *|*
- |* Part of the LLVM Project, under the Apache License v2.0 with LLVM *|
- |* Exceptions. *|
- |* See https://llvm.org/LICENSE.txt for license information. *|
- |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception *|
- |* *|
- |*===----------------------------------------------------------------------===*|
- |* *|
- |* This file contains definitions to figure out the size of _HOST_ data
- types.*|
- |* This file is important because different host OS's define different
- macros,*|
- |* which makes portability tough.  This file exports the following *|
- |* definitions: *|
- |* *|
- |*   [u]int(32|64)_t : typedefs for signed and unsigned 32/64 bit system
- types*|
- |*   [U]INT(8|16|32|64)_(MIN|MAX) : Constants for the min and max values. *|
- |* *|
- |* No library is required when using these functions. *|
- |* *|
- |*===----------------------------------------------------------------------===*/
-
-/* Please leave this file C-compatible. */
-#ifndef RCC_DATATYPES_H
-#define RCC_DATATYPES_H
-
-#include <inttypes.h>
-#include <stdint.h>
-
-#ifndef _MSC_VER
-
-#if !defined(UINT32_MAX)
-#error "The standard header <cstdint> is not C++11 compliant. Must #define "\
-        "__STDC_LIMIT_MACROS before #including llvm-c/DataTypes.h"
-#endif
-
-#if !defined(UINT32_C)
-#error "The standard header <cstdint> is not C++11 compliant. Must #define "\
-        "__STDC_CONSTANT_MACROS before #including llvm-c/DataTypes.h"
-#endif
-
-/* Note that <inttypes.h> includes <stdint.h>, if this is a C99 system. */
-#include <sys/types.h>
-
-#ifdef _AIX
-// GCC is strict about defining large constants: they must have LL modifier.
-#undef INT64_MAX
-#undef INT64_MIN
-#endif
-
-#else /* _MSC_VER */
-#ifdef __cplusplus
-#include <cstddef>
-#include <cstdlib>
-#else
-#include <stddef.h>
-#include <stdlib.h>
-#endif
-#include <sys/types.h>
-
-#if defined(_WIN64)
-typedef signed __int64 ssize_t;
-#else
-typedef signed int ssize_t;
-#endif /* _WIN64 */
-
-#endif /* _MSC_VER */
-
-/* Set defaults for constants which we cannot find. */
-#if !defined(INT64_MAX)
-#define INT64_MAX 9223372036854775807LL
-#endif
-#if !defined(INT64_MIN)
-#define INT64_MIN ((-INT64_MAX) - 1)
-#endif
-#if !defined(UINT64_MAX)
-#define UINT64_MAX 0xffffffffffffffffULL
-#endif
-
-#endif
diff --git a/rcc/include/rcc/Support/Compiler.h b/rcc/include/rcc/Support/Compiler.h
new file mode 100644
index 0000000..1076827
--- /dev/null
+++ b/rcc/include/rcc/Support/Compiler.h
@@ -0,0 +1,106 @@
+/*
+ RCC-Project
+
+ Copyright (C) 2026 Richard Qin
+
+ This file is part of RCC-Project.
+
+ RCC-Project is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your option) any
+ later version.
+
+ RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ RCC-Project; see the file COPYING.  If not see
+ <http://www.gnu.org/licenses/>.
+*/
+
+//===-- rcc/Support/Compiler.h - RCC ABI support ---------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef RCC_SUPPORT_COMPILER_H
+#define RCC_SUPPORT_COMPILER_H
+
+#include "core/compiler/Compiler.h"
+#include "rcc/Config/rcc-config.h"
+
+/// RCC_EXTERNAL_VISIBILITY - classes, functions, and variables marked with
+/// this attribute will be made public and visible outside of a shared library.
+#if defined(RCC_BUILD_RCC_DYLIB) || defined(RCC_BUILD_SHARED_LIBS)
+#define RCC_EXTERNAL_VISIBILITY LIBBASE_ATTRIBUTE_VISIBILITY_DEFAULT
+#else
+#define RCC_EXTERNAL_VISIBILITY
+#endif
+
+/// RCC_LIBRARY_VISIBILITY - Mark symbols private to the RCC shared library.
+#if (!(defined(_WIN32) || defined(__CYGWIN__)) ||                            \
+     ((defined(__MINGW32__) || defined(__CYGWIN__)) && defined(__clang__)))
+#define RCC_LIBRARY_VISIBILITY LIBBASE_ATTRIBUTE_VISIBILITY_HIDDEN
+#if defined(__clang__) && __clang_major__ < 15
+#define RCC_LIBRARY_VISIBILITY_NAMESPACE [[gnu::visibility("hidden")]]
+#else
+#define RCC_LIBRARY_VISIBILITY_NAMESPACE LIBBASE_ATTRIBUTE_VISIBILITY_HIDDEN
+#endif
+#define RCC_ALWAYS_EXPORT LIBBASE_ATTRIBUTE_VISIBILITY_DEFAULT
+#elif defined(_WIN32)
+#define RCC_ALWAYS_EXPORT __declspec(dllexport)
+#define RCC_LIBRARY_VISIBILITY
+#define RCC_LIBRARY_VISIBILITY_NAMESPACE
+#else
+#define RCC_LIBRARY_VISIBILITY
+#define RCC_ALWAYS_EXPORT
+#define RCC_LIBRARY_VISIBILITY_NAMESPACE
+#endif
+
+/// RCC_ABI is the main export macro for the RCC public interface.
+/// RCC_ABI_EXPORT always exports a symbol from the defining library.
+/// RCC_EXPORT_TEMPLATE marks explicit template instantiations.
+/// RCC_TEMPLATE_ABI marks extern template declarations.
+#ifndef RCC_ABI_GENERATING_ANNOTATIONS
+#define RCC_ABI_NOT_EXPORTED
+#if defined(RCC_ENABLE_RCC_EXPORT_ANNOTATIONS) && !defined(RCC_BUILD_STATIC)
+#if defined(_WIN32) && !defined(__MINGW32__)
+#if defined(RCC_EXPORTS)
+#define RCC_ABI __declspec(dllexport)
+#define RCC_TEMPLATE_ABI
+#define RCC_EXPORT_TEMPLATE __declspec(dllexport)
+#else
+#define RCC_ABI __declspec(dllimport)
+#define RCC_TEMPLATE_ABI __declspec(dllimport)
+#define RCC_EXPORT_TEMPLATE
+#endif
+#define RCC_ABI_EXPORT __declspec(dllexport)
+#elif __has_attribute(visibility)
+#if defined(__ELF__) || defined(__MINGW32__) || defined(_AIX) ||               \
+    defined(__MVS__) || defined(__CYGWIN__)
+#define RCC_ABI LIBBASE_ATTRIBUTE_VISIBILITY_DEFAULT
+#define RCC_TEMPLATE_ABI RCC_ABI
+#define RCC_EXPORT_TEMPLATE
+#define RCC_ABI_EXPORT RCC_ABI
+#elif defined(__MACH__) || defined(__wasm__) || defined(__EMSCRIPTEN__)
+#define RCC_ABI LIBBASE_ATTRIBUTE_VISIBILITY_DEFAULT
+#define RCC_TEMPLATE_ABI
+#define RCC_EXPORT_TEMPLATE
+#define RCC_ABI_EXPORT RCC_ABI
+#endif
+#endif
+#endif
+#if !defined(RCC_ABI)
+#define RCC_ABI
+#define RCC_TEMPLATE_ABI
+#define RCC_EXPORT_TEMPLATE
+#define RCC_ABI_EXPORT
+#endif
+#define RCC_ABI_FOR_TEST RCC_ABI
+#endif
+
+#endif