thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-24 16:42:05 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #21639 from changvvb/support-apple-m1

Browse Source 
Support Apple m1
This commit is contained in:
Maksim Kita 2021-04-17 02:44:15 +03:00 committed by GitHub
commit 3f3f928c1f
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
21 changed files with 1456 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
base/common/wide_integer_impl.h
View File

@ -271,9 +271,13 @@ struct integer<Bits, Signed>::_impl
/// As to_Integral does a static_cast to int64_t, it may result in UB.
/// The necessary check here is that long double has enough significant (mantissa) bits to store the
/// int64_t max value precisely.
//TODO Be compatible with Apple aarch64
#if not (defined(__APPLE__) && defined(__aarch64__))
static_assert(LDBL_MANT_DIG >= 64,
"On your system long double has less than 64 precision bits,"
"which may result in UB when initializing double from int64_t");
#endif
if ((rhs > 0 && rhs < static_cast<long double>(max_int)) || (rhs < 0 && rhs > static_cast<long double>(min_int)))
{

2
cmake/arch.cmake
View File

@ -1,7 +1,7 @@
if (CMAKE_SYSTEM_PROCESSOR MATCHES "amd64|x86_64")
set (ARCH_AMD64 1)
endif ()
if (CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
if (CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*|arm64.*|ARM64.*)")
set (ARCH_AARCH64 1)
endif ()
if (ARCH_AARCH64 OR CMAKE_SYSTEM_PROCESSOR MATCHES "arm")

3
cmake/darwin/default_libs.cmake
View File

@ -4,6 +4,9 @@ set (DEFAULT_LIBS "${DEFAULT_LIBS} ${COVERAGE_OPTION} -lc -lm -lpthread -ldl")
if (COMPILER_GCC)
set (DEFAULT_LIBS "${DEFAULT_LIBS} -lgcc_eh")
if (ARCH_AARCH64)
set (DEFAULT_LIBS "${DEFAULT_LIBS} -lgcc")
endif ()
endif ()
message(STATUS "Default libraries: ${DEFAULT_LIBS}")

14
cmake/darwin/toolchain-aarch64.cmake Normal file
View File

@ -0,0 +1,14 @@
set (CMAKE_SYSTEM_NAME "Darwin")
set (CMAKE_SYSTEM_PROCESSOR "aarch64")
set (CMAKE_C_COMPILER_TARGET "aarch64-apple-darwin")
set (CMAKE_CXX_COMPILER_TARGET "aarch64-apple-darwin")
set (CMAKE_ASM_COMPILER_TARGET "aarch64-apple-darwin")
set (CMAKE_OSX_SYSROOT "${CMAKE_CURRENT_LIST_DIR}/../toolchain/darwin-aarch64")
set (CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY) # disable linkage check - it doesn't work in CMake
set (HAS_PRE_1970_EXITCODE "0" CACHE STRING "Result from TRY_RUN" FORCE)
set (HAS_PRE_1970_EXITCODE__TRYRUN_OUTPUT "" CACHE STRING "Output from TRY_RUN" FORCE)
set (HAS_POST_2038_EXITCODE "0" CACHE STRING "Result from TRY_RUN" FORCE)
set (HAS_POST_2038_EXITCODE__TRYRUN_OUTPUT "" CACHE STRING "Output from TRY_RUN" FORCE)

3
cmake/find/ldap.cmake
View File

@ -64,7 +64,8 @@ if (NOT OPENLDAP_FOUND AND NOT MISSING_INTERNAL_LDAP_LIBRARY)
( "${_system_name}" STREQUAL "linux" AND "${_system_processor}" STREQUAL "aarch64" ) OR
( "${_system_name}" STREQUAL "linux" AND "${_system_processor}" STREQUAL "ppc64le" ) OR
( "${_system_name}" STREQUAL "freebsd" AND "${_system_processor}" STREQUAL "x86_64" ) OR
( "${_system_name}" STREQUAL "darwin" AND "${_system_processor}" STREQUAL "x86_64" )
( "${_system_name}" STREQUAL "darwin" AND "${_system_processor}" STREQUAL "x86_64" ) OR
( "${_system_name}" STREQUAL "darwin" AND "${_system_processor}" STREQUAL "aarch64" )
)
set (_ldap_supported_platform TRUE)
endif ()

4
cmake/find/rocksdb.cmake
View File

@ -1,3 +1,7 @@
if (OS_DARWIN AND ARCH_AARCH64)
set (ENABLE_ROCKSDB OFF CACHE INTERNAL "")
endif()
option(ENABLE_ROCKSDB "Enable ROCKSDB" ${ENABLE_LIBRARIES})
if (NOT ENABLE_ROCKSDB)

2
contrib/boost vendored

@ -1 +1 @@
Subproject commit ee24fa55bc46e4d2ce7d0d052cc5a0d9b1be8c36
Subproject commit a8d43d3142cc6b26fc55bec33f7f6edb1156ab7a

11
contrib/jemalloc-cmake/CMakeLists.txt
View File

@ -1,10 +1,13 @@
if (SANITIZE OR NOT (ARCH_AMD64 OR ARCH_ARM OR ARCH_PPC64LE) OR NOT (OS_LINUX OR OS_FREEBSD OR OS_DARWIN))
if (SANITIZE OR NOT (
((OS_LINUX OR OS_FREEBSD) AND (ARCH_AMD64 OR ARCH_ARM OR ARCH_PPC64LE)) OR
(OS_DARWIN AND CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
))
if (ENABLE_JEMALLOC)
message (${RECONFIGURE_MESSAGE_LEVEL}
"jemalloc is disabled implicitly: it doesn't work with sanitizers and can only be used with x86_64, aarch64 or ppc64le on linux or freebsd.")
endif()
"jemalloc is disabled implicitly: it doesn't work with sanitizers and can only be used with x86_64, aarch64, or ppc64le Linux or FreeBSD builds and RelWithDebInfo macOS builds.")
endif ()
set (ENABLE_JEMALLOC OFF)
else()
else ()
option (ENABLE_JEMALLOC "Enable jemalloc allocator" ${ENABLE_LIBRARIES})
endif ()

13
contrib/jemalloc-cmake/include_darwin_aarch64/jemalloc/internal/jemalloc_internal_defs.h.in
View File

@ -42,7 +42,7 @@
* total number of bits in a pointer, e.g. on x64, for which the uppermost 16
* bits are the same as bit 47.
*/
#define LG_VADDR 48
#define LG_VADDR 64
/* Defined if C11 atomics are available. */
#define JEMALLOC_C11_ATOMICS 1
@ -101,11 +101,6 @@
*/
#define JEMALLOC_HAVE_MACH_ABSOLUTE_TIME 1
/*
* Defined if clock_gettime(CLOCK_REALTIME, ...) is available.
*/
#define JEMALLOC_HAVE_CLOCK_REALTIME 1
/*
* Defined if _malloc_thread_cleanup() exists. At least in the case of
* FreeBSD, pthread_key_create() allocates, which if used during malloc
@ -181,14 +176,14 @@
/* #undef LG_QUANTUM */
/* One page is 2^LG_PAGE bytes. */
#define LG_PAGE 16
#define LG_PAGE 14
/*
* One huge page is 2^LG_HUGEPAGE bytes. Note that this is defined even if the
* system does not explicitly support huge pages; system calls that require
* explicit huge page support are separately configured.
*/
#define LG_HUGEPAGE 29
#define LG_HUGEPAGE 21
/*
* If defined, adjacent virtual memory mappings with identical attributes
@ -356,7 +351,7 @@
/* #undef JEMALLOC_EXPORT */
/* config.malloc_conf options string. */
#define JEMALLOC_CONFIG_MALLOC_CONF "@JEMALLOC_CONFIG_MALLOC_CONF@"
#define JEMALLOC_CONFIG_MALLOC_CONF ""
/* If defined, jemalloc takes the malloc/free/etc. symbol names. */
/* #undef JEMALLOC_IS_MALLOC */

2
contrib/librdkafka-cmake/config.h.in
View File

@ -66,7 +66,7 @@
#cmakedefine WITH_SASL_OAUTHBEARER 1
#cmakedefine WITH_SASL_CYRUS 1
// crc32chw
#if !defined(__PPC__) && (!defined(__aarch64__) || defined(__ARM_FEATURE_CRC32))
#if !defined(__PPC__) && (!defined(__aarch64__) || defined(__ARM_FEATURE_CRC32)) && !(defined(__aarch64__) && defined(__APPLE__))
#define WITH_CRC32C_HW 1
#endif
// regex

63
contrib/openldap-cmake/darwin_aarch64/include/lber_types.h Normal file
View File

@ -0,0 +1,63 @@
/* include/lber_types.h. Generated from lber_types.hin by configure. */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2020 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/*
* LBER types
*/
#ifndef _LBER_TYPES_H
#define _LBER_TYPES_H
#include <ldap_cdefs.h>
LDAP_BEGIN_DECL
/* LBER boolean, enum, integers (32 bits or larger) */
#define LBER_INT_T int
/* LBER tags (32 bits or larger) */
#define LBER_TAG_T long
/* LBER socket descriptor */
#define LBER_SOCKET_T int
/* LBER lengths (32 bits or larger) */
#define LBER_LEN_T long
/* ------------------------------------------------------------ */
/* booleans, enumerations, and integers */
typedef LBER_INT_T ber_int_t;
/* signed and unsigned versions */
typedef signed LBER_INT_T ber_sint_t;
typedef unsigned LBER_INT_T ber_uint_t;
/* tags */
typedef unsigned LBER_TAG_T ber_tag_t;
/* "socket" descriptors */
typedef LBER_SOCKET_T ber_socket_t;
/* lengths */
typedef unsigned LBER_LEN_T ber_len_t;
/* signed lengths */
typedef signed LBER_LEN_T ber_slen_t;
LDAP_END_DECL
#endif /* _LBER_TYPES_H */

74
contrib/openldap-cmake/darwin_aarch64/include/ldap_config.h Normal file
View File

@ -0,0 +1,74 @@
/* include/ldap_config.h. Generated from ldap_config.hin by configure. */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2020 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/*
* This file works in conjunction with OpenLDAP configure system.
* If you do no like the values below, adjust your configure options.
*/
#ifndef _LDAP_CONFIG_H
#define _LDAP_CONFIG_H
/* directory separator */
#ifndef LDAP_DIRSEP
#ifndef _WIN32
#define LDAP_DIRSEP "/"
#else
#define LDAP_DIRSEP "\\"
#endif
#endif
/* directory for temporary files */
#if defined(_WIN32)
# define LDAP_TMPDIR "C:\\." /* we don't have much of a choice */
#elif defined( _P_tmpdir )
# define LDAP_TMPDIR _P_tmpdir
#elif defined( P_tmpdir )
# define LDAP_TMPDIR P_tmpdir
#elif defined( _PATH_TMPDIR )
# define LDAP_TMPDIR _PATH_TMPDIR
#else
# define LDAP_TMPDIR LDAP_DIRSEP "tmp"
#endif
/* directories */
#ifndef LDAP_BINDIR
#define LDAP_BINDIR "/tmp/ldap-prefix/bin"
#endif
#ifndef LDAP_SBINDIR
#define LDAP_SBINDIR "/tmp/ldap-prefix/sbin"
#endif
#ifndef LDAP_DATADIR
#define LDAP_DATADIR "/tmp/ldap-prefix/share/openldap"
#endif
#ifndef LDAP_SYSCONFDIR
#define LDAP_SYSCONFDIR "/tmp/ldap-prefix/etc/openldap"
#endif
#ifndef LDAP_LIBEXECDIR
#define LDAP_LIBEXECDIR "/tmp/ldap-prefix/libexec"
#endif
#ifndef LDAP_MODULEDIR
#define LDAP_MODULEDIR "/tmp/ldap-prefix/libexec/openldap"
#endif
#ifndef LDAP_RUNDIR
#define LDAP_RUNDIR "/tmp/ldap-prefix/var"
#endif
#ifndef LDAP_LOCALEDIR
#define LDAP_LOCALEDIR ""
#endif
#endif /* _LDAP_CONFIG_H */

61
contrib/openldap-cmake/darwin_aarch64/include/ldap_features.h Normal file
View File

@ -0,0 +1,61 @@
/* include/ldap_features.h. Generated from ldap_features.hin by configure. */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2020 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/*
* LDAP Features
*/
#ifndef _LDAP_FEATURES_H
#define _LDAP_FEATURES_H 1
/* OpenLDAP API version macros */
#define LDAP_VENDOR_VERSION 20501
#define LDAP_VENDOR_VERSION_MAJOR 2
#define LDAP_VENDOR_VERSION_MINOR 5
#define LDAP_VENDOR_VERSION_PATCH X
/*
** WORK IN PROGRESS!
**
** OpenLDAP reentrancy/thread-safeness should be dynamically
** checked using ldap_get_option().
**
** The -lldap implementation is not thread-safe.
**
** The -lldap_r implementation is:
** LDAP_API_FEATURE_THREAD_SAFE (basic thread safety)
** but also be:
** LDAP_API_FEATURE_SESSION_THREAD_SAFE
** LDAP_API_FEATURE_OPERATION_THREAD_SAFE
**
** The preprocessor flag LDAP_API_FEATURE_X_OPENLDAP_THREAD_SAFE
** can be used to determine if -lldap_r is available at compile
** time. You must define LDAP_THREAD_SAFE if and only if you
** link with -lldap_r.
**
** If you fail to define LDAP_THREAD_SAFE when linking with
** -lldap_r or define LDAP_THREAD_SAFE when linking with -lldap,
** provided header definitions and declarations may be incorrect.
**
*/
/* is -lldap_r available or not */
#define LDAP_API_FEATURE_X_OPENLDAP_THREAD_SAFE 1
/* LDAP v2 Referrals */
/* #undef LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS */
#endif /* LDAP_FEATURES */

1169
contrib/openldap-cmake/darwin_aarch64/include/portable.h Normal file
View File

File diff suppressed because it is too large Load Diff

7
contrib/poco-cmake/Foundation/CMakeLists.txt
View File

@ -233,3 +233,10 @@ else ()
message (STATUS "Using Poco::Foundation: ${LIBRARY_POCO_FOUNDATION} ${INCLUDE_POCO_FOUNDATION}")
endif ()
if(OS_DARWIN AND ARCH_AARCH64)
target_compile_definitions (_poco_foundation
PRIVATE
POCO_NO_STAT64
)
endif()

4
contrib/rocksdb-cmake/CMakeLists.txt
View File

@ -142,14 +142,14 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc)64")
endif(HAS_ALTIVEC)
endif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc)64")
if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64")
if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64|arm64|ARM64")
CHECK_C_COMPILER_FLAG("-march=armv8-a+crc+crypto" HAS_ARMV8_CRC)
if(HAS_ARMV8_CRC)
message(STATUS " HAS_ARMV8_CRC yes")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv8-a+crc+crypto -Wno-unused-function")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=armv8-a+crc+crypto -Wno-unused-function")
endif(HAS_ARMV8_CRC)
endif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64")
endif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64|arm64|ARM64")
include(CheckCXXSourceCompiles)

60
docs/en/development/build-osx.md
View File

@ -5,12 +5,13 @@ toc_title: Build on Mac OS X
# How to Build ClickHouse on Mac OS X {#how-to-build-clickhouse-on-mac-os-x}
Build should work on x86_64 (Intel) based macOS 10.15 (Catalina) and higher with recent Xcode's native AppleClang, or Homebrew's vanilla Clang or GCC compilers.
Build should work on x86_64 (Intel) and arm64 (Apple Silicon) based macOS 10.15 (Catalina) and higher with recent Xcode's native AppleClang, or Homebrew's vanilla Clang or GCC compilers.
## Install Homebrew {#install-homebrew}
``` bash
$ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
# ...and follow the printed instructions on any additional steps required to complete the installation.
```
## Install Xcode and Command Line Tools {#install-xcode-and-command-line-tools}
@ -22,8 +23,8 @@ Open it at least once to accept the end-user license agreement and automatically
Then, make sure that the latest Comman Line Tools are installed and selected in the system:
``` bash
$ sudo rm -rf /Library/Developer/CommandLineTools
$ sudo xcode-select --install
sudo rm -rf /Library/Developer/CommandLineTools
sudo xcode-select --install
```
Reboot.
@ -31,14 +32,15 @@ Reboot.
## Install Required Compilers, Tools, and Libraries {#install-required-compilers-tools-and-libraries}
``` bash
$ brew update
$ brew install cmake ninja libtool gettext llvm gcc
brew update
brew install cmake ninja libtool gettext llvm gcc
```
## Checkout ClickHouse Sources {#checkout-clickhouse-sources}
``` bash
$ git clone --recursive git@github.com:ClickHouse/ClickHouse.git # or https://github.com/ClickHouse/ClickHouse.git
git clone --recursive git@github.com:ClickHouse/ClickHouse.git
# ...alternatively, you can use https://github.com/ClickHouse/ClickHouse.git as the repo URL.
```
## Build ClickHouse {#build-clickhouse}
@ -46,37 +48,37 @@ $ git clone --recursive git@github.com:ClickHouse/ClickHouse.git # or https://gi
To build using Xcode's native AppleClang compiler:
``` bash
$ cd ClickHouse
$ rm -rf build
$ mkdir build
$ cd build
$ cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DENABLE_JEMALLOC=OFF ..
$ cmake --build . --config RelWithDebInfo
$ cd ..
cd ClickHouse
rm -rf build
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
cmake --build . --config RelWithDebInfo
cd ..
```
To build using Homebrew's vanilla Clang compiler:
``` bash
$ cd ClickHouse
$ rm -rf build
$ mkdir build
$ cd build
$ cmake -DCMAKE_C_COMPILER=$(brew --prefix llvm)/bin/clang -DCMAKE_CXX_COMPILER=$(brew --prefix llvm)/bin/clang++ -DCMAKE_BUILD_TYPE=RelWithDebInfo -DENABLE_JEMALLOC=OFF ..
$ cmake --build . --config RelWithDebInfo
$ cd ..
cd ClickHouse
rm -rf build
mkdir build
cd build
cmake -DCMAKE_C_COMPILER=$(brew --prefix llvm)/bin/clang -DCMAKE_CXX_COMPILER=$(brew --prefix llvm)/bin/clang++ -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
cmake --build . --config RelWithDebInfo
cd ..
```
To build using Homebrew's vanilla GCC compiler:
``` bash
$ cd ClickHouse
$ rm -rf build
$ mkdir build
$ cd build
$ cmake -DCMAKE_C_COMPILER=$(brew --prefix gcc)/bin/gcc-10 -DCMAKE_CXX_COMPILER=$(brew --prefix gcc)/bin/g++-10 -DCMAKE_BUILD_TYPE=RelWithDebInfo -DENABLE_JEMALLOC=OFF ..
$ cmake --build . --config RelWithDebInfo
$ cd ..
cd ClickHouse
rm -rf build
mkdir build
cd build
cmake -DCMAKE_C_COMPILER=$(brew --prefix gcc)/bin/gcc-10 -DCMAKE_CXX_COMPILER=$(brew --prefix gcc)/bin/g++-10 -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
cmake --build . --config RelWithDebInfo
cd ..
```
## Caveats {#caveats}
@ -115,7 +117,7 @@ To do so, create the `/Library/LaunchDaemons/limit.maxfiles.plist` file with the
Execute the following command:
``` bash
$ sudo chown root:wheel /Library/LaunchDaemons/limit.maxfiles.plist
sudo chown root:wheel /Library/LaunchDaemons/limit.maxfiles.plist
```
Reboot.

1
src/Columns/tests/gtest_weak_hash_32.cpp
View File

@ -88,7 +88,6 @@ void checkColumn(
if (num_collisions <= max_collisions_to_print)
{
collisions_str << "Collision:\n";
collisions_str << print_for_row(it->second) << '\n';
collisions_str << print_for_row(i) << std::endl;
}

4
src/Common/StackTrace.cpp
View File

@ -184,6 +184,10 @@ static void * getCallerAddress(const ucontext_t & context)
# else
return reinterpret_cast<void *>(context.uc_mcontext.gregs[REG_RIP]);
# endif
#elif defined(__APPLE__) && defined(__aarch64__)
return reinterpret_cast<void *>(context.uc_mcontext->__ss.__pc);
#elif defined(__aarch64__)
return reinterpret_cast<void *>(context.uc_mcontext.pc);
#elif defined(__powerpc64__)

2
src/IO/tests/gtest_DateTimeToString.cpp
View File

@ -161,7 +161,7 @@ INSTANTIATE_TEST_SUITE_P(DateTimeToString, DateTimeToStringParamTestDayNum,
{
"Negative DayNum value wraps as if it was UInt16 due to LUT limitations and to maintain compatibility with existing code.",
DayNum(-10 * 365),
"2106-02-07"
"2139-06-10"
},
})
);

3
src/Parsers/New/AST/Identifier.cpp
View File

@ -142,16 +142,19 @@ antlrcpp::Any ParseTreeVisitor::visitIdentifierOrNull(ClickHouseParser::Identifi
antlrcpp::Any ParseTreeVisitor::visitInterval(ClickHouseParser::IntervalContext *)
{
asm (""); // prevent symbol removal
__builtin_unreachable();
}
antlrcpp::Any ParseTreeVisitor::visitKeyword(ClickHouseParser::KeywordContext *)
{
asm (""); // prevent symbol removal
__builtin_unreachable();
}
antlrcpp::Any ParseTreeVisitor::visitKeywordForAlias(ClickHouseParser::KeywordForAliasContext *)
{
asm (""); // prevent symbol removal
__builtin_unreachable();
}