#
# Copyright (c) 1994 by Xerox Corporation.  All rights reserved.
# Copyright (c) 1996 by Silicon Graphics.  All rights reserved.
# Copyright (c) 1998 by Fergus Henderson.  All rights reserved.
# Copyright (c) 2000-2010 by Hewlett-Packard Company.  All rights reserved.
# Copyright (c) 2010-2021 Ivan Maidanski
##
# THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
# OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
##
# Permission is hereby granted to use or copy this program
# for any purpose,  provided the above notices are retained on all copies.
# Permission to modify the code and to distribute modified code is granted,
# provided the above notices are retained, and a notice that the code was
# modified is included with the above copyright notice.
##

#
#  get cmake and run:
#    cmake -G "Visual Studio 8 2005"
#  in the same dir as this file
#  this will generate gc.sln
#

cmake_minimum_required(VERSION 3.5)

set(PACKAGE_VERSION 8.2.8)
# Version must match that in AC_INIT of configure.ac and that in README.
# Version must conform to: [0-9]+[.][0-9]+[.][0-9]+

# Info (current:revision:age) for the Libtool versioning system.
# These values should match those in cord/cord.am and Makefile.am.
set(LIBCORD_VER_INFO    6:1:5)
set(LIBGC_VER_INFO      6:4:5)
set(LIBGCCPP_VER_INFO   6:0:5)

option(enable_cplusplus "C++ support" OFF)
if (enable_cplusplus)
 project(gc)
else()
 project(gc C)
endif()

if (POLICY CMP0057)
 # Required for CheckLinkerFlag, at least.
 cmake_policy(SET CMP0057 NEW)
endif()

include(CheckCCompilerFlag)
include(CheckCSourceCompiles)
include(CheckFunctionExists)
include(CheckIncludeFile)
include(CheckSymbolExists)
include(CMakePackageConfigHelpers)
include(CTest)
include(GNUInstallDirs)

if (NOT (${CMAKE_VERSION} VERSION_LESS "3.18.0"))
 include(CheckLinkerFlag)
endif()

# Customize the build by passing "-D<option_name>=ON|OFF" in the command line.
option(BUILD_SHARED_LIBS "Build shared libraries" ON)
option(build_cord "Build cord library" ON)
option(build_tests "Build tests" OFF)
option(enable_docs "Build and install documentation" ON)
option(enable_threads "Support threads" ON)
option(enable_parallel_mark "Parallelize marking and free list construction" ON)
option(enable_thread_local_alloc "Turn on thread-local allocation optimization" ON)
option(enable_threads_discovery "Enable threads discovery in GC" ON)
option(enable_throw_bad_alloc_library "Turn on C++ gctba library build" ON)
option(enable_gcj_support "Support for gcj" ON)
option(enable_sigrt_signals "Use SIGRTMIN-based signals for thread suspend/resume" OFF)
option(enable_gc_debug "Support for pointer back-tracing" OFF)
option(disable_gc_debug "Disable debugging like GC_dump and its callees" OFF)
option(enable_java_finalization "Support for java finalization" ON)
option(enable_atomic_uncollectable "Support for atomic uncollectible allocation" ON)
option(enable_redirect_malloc "Redirect malloc and friends to GC routines" OFF)
option(enable_disclaim "Support alternative finalization interface" ON)
option(enable_large_config "Optimize for large heap or root set" OFF)
option(enable_gc_assertions "Enable collector-internal assertion checking" OFF)
option(enable_mmap "Use mmap instead of sbrk to expand the heap" OFF)
option(enable_munmap "Return page to the OS if empty for N collections" ON)
option(enable_dynamic_loading "Enable tracing of dynamic library data roots" ON)
option(enable_register_main_static_data "Perform the initial guess of data root sets" ON)
option(enable_checksums "Report erroneously cleared dirty bits" OFF)
option(enable_werror "Pass -Werror to the C compiler (treat warnings as errors)" OFF)
option(enable_single_obj_compilation "Compile all libgc source files into single .o" OFF)
option(enable_handle_fork "Attempt to ensure a usable collector after fork()" ON)
option(disable_handle_fork "Prohibit installation of pthread_atfork() handlers" OFF)
option(enable_emscripten_asyncify "Use Emscripten asyncify feature" OFF)
option(install_headers "Install header and pkg-config metadata files" ON)
option(without_libatomic_ops "Use atomic_ops.h in libatomic_ops/src" OFF)

# Override the default build type to RelWithDebInfo (this instructs cmake to
# pass -O2 -g -DNDEBUG options to the compiler by default).
if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
 set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE
     STRING "Choose the type of build." FORCE)
 set_property(CACHE CMAKE_BUILD_TYPE PROPERTY
              STRINGS "Debug" "Release" "RelWithDebInfo" "MinSizeRel")
endif()

# Convert VER_INFO values to [SO]VERSION ones.
if (BUILD_SHARED_LIBS)
 # cord:
 string(REGEX REPLACE "(.+):.+:.+"  "\\1" cord_cur ${LIBCORD_VER_INFO})
 string(REGEX REPLACE ".+:(.+):.+"  "\\1" cord_rev ${LIBCORD_VER_INFO})
 string(REGEX REPLACE ".+:.+:(.+)$" "\\1" cord_age ${LIBCORD_VER_INFO})
 math(EXPR CORD_SOVERSION "${cord_cur} - ${cord_age}")
 set(CORD_VERSION_PROP "${CORD_SOVERSION}.${cord_age}.${cord_rev}")
 message(STATUS "CORD_VERSION_PROP = ${CORD_VERSION_PROP}")
 # gc:
 string(REGEX REPLACE "(.+):.+:.+"  "\\1" gc_cur ${LIBGC_VER_INFO})
 string(REGEX REPLACE ".+:(.+):.+"  "\\1" gc_rev ${LIBGC_VER_INFO})
 string(REGEX REPLACE ".+:.+:(.+)$" "\\1" gc_age ${LIBGC_VER_INFO})
 math(EXPR GC_SOVERSION "${gc_cur} - ${gc_age}")
 set(GC_VERSION_PROP "${GC_SOVERSION}.${gc_age}.${gc_rev}")
 message(STATUS "GC_VERSION_PROP = ${GC_VERSION_PROP}")
 # gccpp and gctba:
 string(REGEX REPLACE "(.+):.+:.+"  "\\1" gccpp_cur ${LIBGCCPP_VER_INFO})
 string(REGEX REPLACE ".+:(.+):.+"  "\\1" gccpp_rev ${LIBGCCPP_VER_INFO})
 string(REGEX REPLACE ".+:.+:(.+)$" "\\1" gccpp_age ${LIBGCCPP_VER_INFO})
 math(EXPR GCCPP_SOVERSION "${gccpp_cur} - ${gccpp_age}")
 set(GCCPP_VERSION_PROP "${GCCPP_SOVERSION}.${gccpp_age}.${gccpp_rev}")
 message(STATUS "GCCPP_VERSION_PROP = ${GCCPP_VERSION_PROP}")
endif(BUILD_SHARED_LIBS)

add_definitions("-DALL_INTERIOR_POINTERS -DNO_EXECUTE_PERMISSION")

# Set struct packing alignment to word (instead of 1-byte).
if (BORLAND)
 add_compile_options(/a4)
elseif (WATCOM)
 add_compile_options(/zp4)
endif()

# Output all warnings.
if (BORLAND)
 # All warnings except for particular ones.
 add_compile_options(/w /w-pro /w-aus /w-par /w-ccc /w-inl /w-rch)
elseif (MSVC)
 # All warnings but ignoring "unreferenced formal parameter" and
 # "conditional expression is constant" ones.
 add_compile_options(/W4 /wd4100 /wd4127)
elseif (WATCOM)
 add_compile_options(/wx)
 if (NOT enable_threads)
   # Suppress "unreachable code" warning in GC_ASSERT(I_HOLD_LOCK()).
   add_compile_options(/wcd=201)
 endif()
else()
 # TODO add -[W]pedantic -Wno-long-long
 add_compile_options(-Wall -Wextra)
endif()

if (WIN32)
 # Disable MS crt security warnings reported e.g. for getenv, strcpy.
 add_definitions("-D_CRT_SECURE_NO_DEPRECATE")
endif()

include_directories(include)

set(SRC alloc.c reclaim.c allchblk.c misc.c mach_dep.c os_dep.c
       mark_rts.c headers.c mark.c obj_map.c blacklst.c finalize.c
       new_hblk.c dbg_mlc.c malloc.c dyn_load.c typd_mlc.c ptr_chck.c
       mallocx.c)
set(THREADDLLIBS_LIST)
set(NEED_LIB_RT)

set(_HOST ${CMAKE_SYSTEM_PROCESSOR}-unknown-${CMAKE_SYSTEM})
string(TOLOWER ${_HOST} HOST)
message(STATUS "TARGET = ${HOST}")

if (enable_threads)
 find_package(Threads REQUIRED)
 message(STATUS "Thread library: ${CMAKE_THREAD_LIBS_INIT}")
 if (without_libatomic_ops OR BORLAND OR MSVC OR WATCOM)
   include_directories(libatomic_ops/src)
   # Note: alternatively, use CFLAGS_EXTRA to pass -I<...>/libatomic_ops/src.
 else()
   # Assume the compiler supports GCC atomic intrinsics.
   add_definitions("-DGC_BUILTIN_ATOMIC")
 endif()
 include_directories(${Threads_INCLUDE_DIR})
 set(THREADDLLIBS_LIST ${CMAKE_THREAD_LIBS_INIT})
 if (${CMAKE_DL_LIBS} MATCHES ^[^-].*)
   # Some cmake versions have a broken non-empty CMAKE_DL_LIBS omitting "-l".
   # Assume CMAKE_DL_LIBS contains just one library.
   set(THREADDLLIBS_LIST ${THREADDLLIBS_LIST} -l${CMAKE_DL_LIBS})
 else()
   set(THREADDLLIBS_LIST ${THREADDLLIBS_LIST} ${CMAKE_DL_LIBS})
 endif()
endif(enable_threads)

set(ATOMIC_OPS_LIBS "") # TODO: Assume libatomic_ops library is not needed.

# Thread support detection.
if (CMAKE_USE_PTHREADS_INIT)
 set(SRC ${SRC} gc_dlopen.c)
 if (CYGWIN OR WIN32)
   set(SRC ${SRC} win32_threads.c)
 else()
   set(SRC ${SRC} pthread_start.c pthread_stop_world.c pthread_support.c)
 endif()
 if (APPLE)
   set(SRC ${SRC} darwin_stop_world.c)
 endif()
 if (HOST MATCHES .*-.*-hpux10.*)
   message(FATAL_ERROR "HP/UX 10 POSIX threads are not supported.")
 endif()
 # Common defines for POSIX platforms.
 add_definitions("-DGC_THREADS -D_REENTRANT")
 if (enable_parallel_mark)
   add_definitions("-DPARALLEL_MARK")
 endif()
 if (enable_thread_local_alloc)
   add_definitions("-DTHREAD_LOCAL_ALLOC")
   set(SRC ${SRC} specific.c thread_local_alloc.c)
 endif()
 message("Explicit GC_INIT() calls may be required.")
 if (HOST MATCHES .*-.*-hpux11.*)
   message("Only HP/UX 11 POSIX threads are supported.")
   add_definitions("-D_POSIX_C_SOURCE=199506L")
   set(NEED_LIB_RT ON)
 elseif (HOST MATCHES .*-.*-netbsd.*)
   message("Only on NetBSD 2.0 or later.")
   add_definitions("-D_PTHREADS")
   set(NEED_LIB_RT ON)
 endif()
 if (WIN32) # AND NOT CYGWIN
   # Does not provide process fork functionality.
 elseif (enable_handle_fork AND NOT disable_handle_fork)
   add_definitions("-DHANDLE_FORK")
 endif()
 if (enable_sigrt_signals)
   add_definitions("-DGC_USESIGRT_SIGNALS")
 endif()
elseif (CMAKE_USE_WIN32_THREADS_INIT)
 add_definitions("-DGC_THREADS")
 if (enable_parallel_mark)
   add_definitions("-DPARALLEL_MARK")
 endif()
 if (enable_thread_local_alloc AND (enable_parallel_mark OR NOT BUILD_SHARED_LIBS))
   # Imply THREAD_LOCAL_ALLOC unless GC_DLL.
   add_definitions("-DTHREAD_LOCAL_ALLOC")
   set(SRC ${SRC} thread_local_alloc.c)
 endif()
 add_definitions("-DEMPTY_GETENV_RESULTS")
 set(SRC ${SRC} win32_threads.c)
elseif (CMAKE_HP_PTHREADS_INIT OR CMAKE_USE_SPROC_INIT)
 message(FATAL_ERROR "Unsupported thread package")
endif()

# Check whether -lrt linker option is needed to use clock_gettime.
if (NOT NEED_LIB_RT)
 check_function_exists(clock_gettime HAVE_CLOCK_GETTIME_DIRECTLY)
 if (NOT HAVE_CLOCK_GETTIME_DIRECTLY)
   # Use of clock_gettime() probably requires linking with "rt" library.
   set(NEED_LIB_RT ON)
 endif()
endif()

# Locate and use "rt" library if needed (and the library is available).
if (NEED_LIB_RT)
 find_library(LIBRT rt)
 if (LIBRT)
   set(THREADDLLIBS_LIST ${THREADDLLIBS_LIST} ${LIBRT})
 endif()
endif(NEED_LIB_RT)

if (disable_handle_fork)
 add_definitions("-DNO_HANDLE_FORK")
endif()

if (enable_gcj_support)
 add_definitions("-DGC_GCJ_SUPPORT")
 if (enable_threads AND NOT (enable_thread_local_alloc AND HOST MATCHES .*-.*-kfreebsd.*-gnu))
   # FIXME: For a reason, gctest hangs up on kFreeBSD if both of
   # THREAD_LOCAL_ALLOC and GC_ENABLE_SUSPEND_THREAD are defined.
   add_definitions("-DGC_ENABLE_SUSPEND_THREAD")
 endif()
 set(SRC ${SRC} gcj_mlc.c)
endif(enable_gcj_support)

if (enable_disclaim)
 add_definitions("-DENABLE_DISCLAIM")
 set(SRC ${SRC} fnlz_mlc.c)
endif()

if (enable_java_finalization)
 add_definitions("-DJAVA_FINALIZATION")
endif()

if (enable_atomic_uncollectable)
 add_definitions("-DGC_ATOMIC_UNCOLLECTABLE")
endif()

if (enable_gc_debug)
 add_definitions("-DDBG_HDRS_ALL -DKEEP_BACK_PTRS")
 if (HOST MATCHES i.86-.*-dgux.*|ia64-.*-linux.*|i586-.*-linux.*|i686-.*-linux.*|x86-.*-linux.*|x86_64-.*-linux.*)
   add_definitions("-DMAKE_BACK_GRAPH")
   if (HOST MATCHES .*-.*-.*linux.*)
     add_definitions("-DSAVE_CALL_COUNT=8")
   endif()
   set(SRC ${SRC} backgraph.c)
 endif()
endif(enable_gc_debug)

if (disable_gc_debug)
 add_definitions("-DNO_DEBUGGING")
elseif (WINCE)
 # Read environment variables from "<program>.gc.env" file.
 add_definitions("-DGC_READ_ENV_FILE")
endif()

if (enable_redirect_malloc)
 if (enable_gc_debug)
   add_definitions("-DREDIRECT_MALLOC=GC_debug_malloc_replacement")
   add_definitions("-DREDIRECT_REALLOC=GC_debug_realloc_replacement")
   add_definitions("-DREDIRECT_FREE=GC_debug_free")
 else()
   add_definitions("-DREDIRECT_MALLOC=GC_malloc")
 endif()
 if (WIN32)
   add_definitions("-DREDIRECT_MALLOC_IN_HEADER")
 else()
   add_definitions("-DGC_USE_DLOPEN_WRAP")
 endif()
endif(enable_redirect_malloc)

if (enable_munmap)
 add_definitions("-DUSE_MMAP -DUSE_MUNMAP")
elseif (enable_mmap)
 add_definitions("-DUSE_MMAP")
endif()

if (NOT enable_dynamic_loading)
 add_definitions("-DIGNORE_DYNAMIC_LOADING")
endif()

if (NOT enable_register_main_static_data)
 add_definitions("-DGC_DONT_REGISTER_MAIN_STATIC_DATA")
endif()

if (enable_large_config)
 add_definitions("-DLARGE_CONFIG")
endif()

if (enable_gc_assertions)
 add_definitions("-DGC_ASSERTIONS")
endif()

if (NOT enable_threads_discovery)
 add_definitions("-DGC_NO_THREADS_DISCOVERY")
endif()

if (enable_checksums)
 if (enable_munmap OR enable_threads)
   message(FATAL_ERROR "CHECKSUMS not compatible with USE_MUNMAP or threads")
 endif()
 add_definitions("-DCHECKSUMS")
 set(SRC ${SRC} checksums.c)
endif(enable_checksums)

if (enable_werror)
 if (BORLAND)
   add_compile_options(/w!)
   if (enable_threads)
     # Workaround "function should return a value" warning for several
     # asm functions in atomic_ops/sysdeps/msftc/x86.h.
     add_compile_options(/w-rvl)
   endif(enable_threads)
 elseif (MSVC)
   add_compile_options(/WX)
   # Workaround "typedef ignored on left of ..." warning reported in
   # imagehlp.h of e.g. Windows Kit 8.1.
   add_compile_options(/wd4091)
 elseif (WATCOM)
   add_compile_options(/we)
 else()
   add_compile_options(-Werror)
   if (APPLE)
     # _dyld_bind_fully_image_containing_address is deprecated in OS X 10.5+
     add_compile_options(-Wno-deprecated-declarations)
   endif()
 endif()
endif(enable_werror)

if (enable_single_obj_compilation OR BUILD_SHARED_LIBS)
 set(SRC extra/gc.c) # override SRC
 if (CMAKE_USE_PTHREADS_INIT AND NOT (CYGWIN OR WIN32))
   add_definitions("-DGC_PTHREAD_START_STANDALONE")
   set(SRC ${SRC} pthread_start.c)
 endif()
elseif (BORLAND)
 # Suppress "GC_push_contents_hdr() is declared but never used" warning.
 add_compile_options(/w-use)
endif()

# Add implementation of backtrace() and backtrace_symbols().
if (MSVC)
 set(SRC ${SRC} extra/msvc_dbg.c)
endif()

# Declare that the libraries do not refer to external symbols.
if (BUILD_SHARED_LIBS AND NOT (APPLE OR ${CMAKE_SYSTEM_NAME} MATCHES "BSD"))
 # Note: performed before CMAKE_REQUIRED_FLAGS is updated with "-c".
 if (${CMAKE_VERSION} VERSION_LESS "3.18.0")
   set(WL_NO_UNDEFINED_OPT "-Wl,--no-undefined")
   check_c_compiler_flag(${WL_NO_UNDEFINED_OPT} HAVE_FLAG_WL_NO_UNDEFINED)
 else()
   set(WL_NO_UNDEFINED_OPT "LINKER:--no-undefined")
   check_linker_flag(C "${WL_NO_UNDEFINED_OPT}" HAVE_FLAG_WL_NO_UNDEFINED)
 endif()
endif()

# Instruct check_c_source_compiles to skip linking.
# Alternatively, we could set CMAKE_REQUIRED_LIBRARIES properly.
SET(CMAKE_REQUIRED_FLAGS "-c")

# Instruct check_c_source_compiles and similar CMake checks not to ignore
# compiler warnings (like "implicit declaration of function").
if (NOT BORLAND AND NOT MSVC AND NOT WATCOM)
 check_c_compiler_flag(-Werror HAVE_FLAG_WERROR)
 if (HAVE_FLAG_WERROR)
   check_c_compiler_flag(-Wno-unused-command-line-argument
                         HAVE_FLAG_WNO_UNUSED_CMDLINE_ARG)
   SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror")
   # Prevent "linker input unused" error in further check_c_compiler_flag.
   if (HAVE_FLAG_WNO_UNUSED_CMDLINE_ARG)
     SET(CMAKE_REQUIRED_FLAGS
         "${CMAKE_REQUIRED_FLAGS} -Wno-unused-command-line-argument")
   endif()
 endif(HAVE_FLAG_WERROR)
endif()

if (BUILD_SHARED_LIBS)
 add_definitions("-DGC_DLL")
 # Pass -fvisibility=hidden option if supported.
 check_c_compiler_flag(-fvisibility=hidden HAVE_FLAG_F_VISIBILITY_HIDDEN)
 if (HAVE_FLAG_F_VISIBILITY_HIDDEN)
   add_definitions("-DGC_VISIBILITY_HIDDEN_SET")
   add_compile_options(-fvisibility=hidden)
 else()
   add_definitions("-DGC_NO_VISIBILITY")
 endif()
else()
 add_definitions("-DGC_NOT_DLL")
 if (WIN32)
   # Do not require the clients to link with "user32" system library.
   add_definitions("-DDONT_USE_USER32_DLL")
 endif(WIN32)
endif()

# Disable strict aliasing optimizations.
# It could re-enabled back by a flag passed in CFLAGS_EXTRA.
check_c_compiler_flag(-fno-strict-aliasing HAVE_FLAG_F_NO_STRICT_ALIASING)
if (HAVE_FLAG_F_NO_STRICT_ALIASING)
 add_compile_options(-fno-strict-aliasing)
endif()

# Prevent "__builtin_return_address with a nonzero argument is unsafe" warning.
if (NOT BORLAND AND NOT MSVC AND NOT WATCOM)
 check_c_compiler_flag(-Wno-frame-address HAVE_FLAG_WNO_FRAME_ADDRESS)
 if (HAVE_FLAG_WNO_FRAME_ADDRESS)
   add_compile_options(-Wno-frame-address)
 endif(HAVE_FLAG_WNO_FRAME_ADDRESS)
endif()

# Extra user-defined flags to pass both to C and C++ compilers.
if (DEFINED CFLAGS_EXTRA)
 separate_arguments(CFLAGS_EXTRA_LIST UNIX_COMMAND "${CFLAGS_EXTRA}")
 add_compile_options(${CFLAGS_EXTRA_LIST})
endif()

# Check whether execinfo.h header file is present.
check_include_file(execinfo.h HAVE_EXECINFO_H)
if (NOT HAVE_EXECINFO_H)
 add_definitions("-DGC_MISSING_EXECINFO_H")
endif()

# Check for getcontext (uClibc can be configured without it, for example).
check_function_exists(getcontext HAVE_GETCONTEXT)
if (HAVE_GETCONTEXT AND NOT APPLE)
 # Double check getcontext() is available (needed at least on OpenBSD 7.3).
 # Note: OS X is excluded here because the header filename differs.
 check_c_source_compiles("
#include <ucontext.h>\n
int main(void) { ucontext_t ctxt; (void)getcontext(&ctxt); return 0; }"
   HAVE_GETCONTEXT_FUNC)
 if (NOT HAVE_GETCONTEXT_FUNC)
   set(HAVE_GETCONTEXT OFF)
 endif()
endif()
if (NOT HAVE_GETCONTEXT)
 add_definitions("-DNO_GETCONTEXT")
endif()

# Check whether dl_iterate_phdr exists (as a strong symbol).
check_function_exists(dl_iterate_phdr HAVE_DL_ITERATE_PHDR)
if (HAVE_DL_ITERATE_PHDR)
 add_definitions("-DHAVE_DL_ITERATE_PHDR")
endif()

check_symbol_exists(sigsetjmp setjmp.h HAVE_SIGSETJMP)
if (NOT HAVE_SIGSETJMP)
 add_definitions("-DGC_NO_SIGSETJMP")
endif()

# pthread_setname_np, if available, may have 1, 2 or 3 arguments.
if (CMAKE_USE_PTHREADS_INIT)
 check_c_source_compiles("
#define _GNU_SOURCE 1\n
#include <pthread.h>\n
int main(void) { (void)pthread_setname_np(\"thread-name\"); return 0; }"
   HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID)
 if (HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID)
   # Define to use 'pthread_setname_np(const char*)' function.
   add_definitions("-DHAVE_PTHREAD_SETNAME_NP_WITHOUT_TID")
 else()
   check_c_source_compiles("
#define _GNU_SOURCE 1\n
#include <pthread.h>\n
int main(void) {\n
 (void)pthread_setname_np(pthread_self(), \"thread-name-%u\", 0); return 0; }"
     HAVE_PTHREAD_SETNAME_NP_WITH_TID_AND_ARG)
   if (HAVE_PTHREAD_SETNAME_NP_WITH_TID_AND_ARG)
     # Define to use 'pthread_setname_np(pthread_t, const char*, void *)'.
     add_definitions("-DHAVE_PTHREAD_SETNAME_NP_WITH_TID_AND_ARG")
   else()
     check_c_source_compiles("
#define _GNU_SOURCE 1\n
#include <pthread.h>\n
int main(void) {\n
 (void)pthread_setname_np(pthread_self(), \"thread-name\"); return 0; }"
       HAVE_PTHREAD_SETNAME_NP_WITH_TID)
     if (HAVE_PTHREAD_SETNAME_NP_WITH_TID)
       # Define to use 'pthread_setname_np(pthread_t, const char*)' function.
       add_definitions("-DHAVE_PTHREAD_SETNAME_NP_WITH_TID")
     endif()
   endif(HAVE_PTHREAD_SETNAME_NP_WITH_TID_AND_ARG)
 endif(HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID)
endif()

# Check for dladdr (used for debugging).
check_c_source_compiles("
#define _GNU_SOURCE 1\n
#include <dlfcn.h>\n
int main(void) { Dl_info info; (void)dladdr(\"\", &info); return 0; }"
 HAVE_DLADDR)
if (HAVE_DLADDR)
 # Define to use 'dladdr' function.
 add_definitions("-DHAVE_DLADDR")
endif()

# Check for emscripten; use asyncify feature if requested.
check_c_source_compiles("
#ifndef __EMSCRIPTEN__\n
# error This is not Emscripten\n
#endif\n
int main(void) { return 0; }"
 EMSCRIPTEN)
if (EMSCRIPTEN AND enable_emscripten_asyncify)
 # Use this option if your program is targeting -sASYNCIFY.  The latter is
 # required to scan the stack, ASYNCIFY_STACK_SIZE is probably needed for
 # gctest only.
 add_definitions("-DEMSCRIPTEN_ASYNCIFY")
 set(CMAKE_EXE_LINKER_FLAGS
       "${CMAKE_EXE_LINKER_FLAGS} -sASYNCIFY -sASYNCIFY_STACK_SIZE=128000")
endif()

add_library(gc ${SRC})
target_link_libraries(gc PRIVATE ${THREADDLLIBS_LIST} ${ATOMIC_OPS_LIBS})
target_include_directories(gc INTERFACE
       "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
       "$<INSTALL_INTERFACE:include>")

if (enable_cplusplus)
 add_library(gccpp gc_badalc.cc gc_cpp.cc)
 target_link_libraries(gccpp PRIVATE gc)
 target_include_directories(gccpp INTERFACE
       "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
       "$<INSTALL_INTERFACE:include>")
 if (enable_throw_bad_alloc_library)
   # The same as gccpp but contains only gc_badalc.
   add_library(gctba gc_badalc.cc)
   target_link_libraries(gctba PRIVATE gc)
   target_include_directories(gctba INTERFACE
       "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
       "$<INSTALL_INTERFACE:include>")
 endif(enable_throw_bad_alloc_library)
endif()

if (build_cord)
 set(CORD_SRC cord/cordbscs.c cord/cordprnt.c cord/cordxtra.c)
 add_library(cord ${CORD_SRC})
 target_link_libraries(cord PRIVATE gc)
 target_include_directories(cord INTERFACE
       "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
       "$<INSTALL_INTERFACE:include>")
 if (BUILD_SHARED_LIBS)
   set_property(TARGET cord PROPERTY VERSION ${CORD_VERSION_PROP})
   set_property(TARGET cord PROPERTY SOVERSION ${CORD_SOVERSION})
 endif()
 install(TARGETS cord EXPORT BDWgcTargets
         LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
         ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
         RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
         INCLUDES DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
endif(build_cord)

if (BUILD_SHARED_LIBS AND HAVE_FLAG_WL_NO_UNDEFINED)
 # Declare that the libraries do not refer to external symbols.
 if (${CMAKE_VERSION} VERSION_LESS "3.13.0")
   target_link_libraries(gc PRIVATE ${WL_NO_UNDEFINED_OPT})
   if (enable_cplusplus)
     target_link_libraries(gccpp PRIVATE ${WL_NO_UNDEFINED_OPT})
     if (enable_throw_bad_alloc_library)
       target_link_libraries(gctba PRIVATE ${WL_NO_UNDEFINED_OPT})
     endif(enable_throw_bad_alloc_library)
   endif(enable_cplusplus)
   if (build_cord)
     target_link_libraries(cord PRIVATE ${WL_NO_UNDEFINED_OPT})
   endif(build_cord)
 else()
   target_link_options(gc PRIVATE ${WL_NO_UNDEFINED_OPT})
   if (enable_cplusplus)
     target_link_options(gccpp PRIVATE ${WL_NO_UNDEFINED_OPT})
     if (enable_throw_bad_alloc_library)
       target_link_options(gctba PRIVATE ${WL_NO_UNDEFINED_OPT})
     endif(enable_throw_bad_alloc_library)
   endif(enable_cplusplus)
   if (build_cord)
     target_link_options(cord PRIVATE ${WL_NO_UNDEFINED_OPT})
   endif(build_cord)
 endif()
endif()

if (BUILD_SHARED_LIBS)
 set_property(TARGET gc PROPERTY VERSION ${GC_VERSION_PROP})
 set_property(TARGET gc PROPERTY SOVERSION ${GC_SOVERSION})
endif()
install(TARGETS gc EXPORT BDWgcTargets
       LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
       ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
       RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
       INCLUDES DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")

if (enable_cplusplus)
 if (BUILD_SHARED_LIBS)
   set_property(TARGET gccpp PROPERTY VERSION ${GCCPP_VERSION_PROP})
   set_property(TARGET gccpp PROPERTY SOVERSION ${GCCPP_SOVERSION})
 endif()
 install(TARGETS gccpp EXPORT BDWgcTargets
         LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
         ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
         RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
         INCLUDES DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
 if (enable_throw_bad_alloc_library)
   if (BUILD_SHARED_LIBS)
     set_property(TARGET gctba PROPERTY VERSION ${GCCPP_VERSION_PROP})
     set_property(TARGET gctba PROPERTY SOVERSION ${GCCPP_SOVERSION})
   endif()
   install(TARGETS gctba EXPORT BDWgcTargets
           LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
           ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
           RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
           INCLUDES DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
 endif(enable_throw_bad_alloc_library)
endif(enable_cplusplus)

if (install_headers)
 install(FILES include/gc.h
               include/gc_backptr.h
               include/gc_config_macros.h
               include/gc_inline.h
               include/gc_mark.h
               include/gc_tiny_fl.h
               include/gc_typed.h
               include/gc_version.h
               include/javaxfc.h
               include/leak_detector.h
         DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/gc")
 install(FILES include/extra/gc.h DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
 if (enable_cplusplus)
   install(FILES include/gc_allocator.h
                 include/gc_cpp.h
           DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/gc")
   install(FILES include/extra/gc_cpp.h
           DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
 endif()
 if (enable_disclaim)
   install(FILES include/gc_disclaim.h
           DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/gc")
 endif()
 if (enable_gcj_support)
   install(FILES include/gc_gcj.h
           DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/gc")
 endif()
 if (enable_threads AND CMAKE_USE_PTHREADS_INIT)
   install(FILES include/gc_pthread_redirects.h
           DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/gc")
 endif()
 if (build_cord)
   install(FILES include/cord.h
                 include/cord_pos.h
                 include/ec.h
           DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/gc")
 endif()

 # Provide pkg-config metadata.
 set(prefix "${CMAKE_INSTALL_PREFIX}")
 set(exec_prefix \${prefix})
 set(includedir "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
 set(libdir "${CMAKE_INSTALL_FULL_LIBDIR}")
 string(REPLACE ";" " " THREADDLLIBS "${THREADDLLIBS_LIST}")
 # ATOMIC_OPS_LIBS, PACKAGE_VERSION are defined above.
 configure_file(bdw-gc.pc.in bdw-gc.pc @ONLY)
 install(FILES "${CMAKE_CURRENT_BINARY_DIR}/bdw-gc.pc"
         DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
endif(install_headers)

if (build_tests)
 if (build_cord)
   add_executable(cordtest cord/tests/cordtest.c)
   target_link_libraries(cordtest PRIVATE cord gc)
   add_test(NAME cordtest COMMAND cordtest)

   if (WIN32 AND NOT CYGWIN)
     if (NOT (CMAKE_C_COMPILER_ID STREQUAL "Clang"))
       # Workaround MS Clang failure to compile a resource file.
       set(DE_WIN_RC cord/tests/de_win.rc)
     endif()
     add_executable(de cord/tests/de.c cord/tests/de_win.c
                    ${DE_WIN_RC})
     set_target_properties(de PROPERTIES WIN32_EXECUTABLE TRUE)
     target_link_libraries(de PRIVATE cord gc gdi32)
   endif()
 endif(build_cord)

 # Compile some tests as C++ to test extern "C" in header files.
 if (enable_cplusplus)
   set_source_files_properties(tests/leak_test.c PROPERTIES LANGUAGE CXX)
   if (NOT MSVC)
     # WinMain-based test hangs at startup if compiled by VC as C++ code.
     set_source_files_properties(tests/test.c PROPERTIES LANGUAGE CXX)
   endif()
   # To avoid "treating 'c' input as 'c++' when in C++ mode" Clang warning.
   if (NOT (BORLAND OR MSVC OR WATCOM))
     add_compile_options(-x c++)
   endif()
 endif(enable_cplusplus)

 add_executable(gctest WIN32 tests/test.c)
 target_link_libraries(gctest PRIVATE gc ${THREADDLLIBS_LIST})
 add_test(NAME gctest COMMAND gctest)
 if (WATCOM)
   # Suppress "conditional expression in if statement is always true/false"
   # and "unreachable code" warnings in GC_MALLOC_[ATOMIC_]WORDS.
   target_compile_options(gctest PRIVATE
                          /wcd=13 /wcd=201 /wcd=367 /wcd=368 /wcd=726)
 endif()

 add_executable(hugetest tests/huge_test.c)
 target_link_libraries(hugetest PRIVATE gc)
 add_test(NAME hugetest COMMAND hugetest)

 add_executable(leaktest tests/leak_test.c)
 target_link_libraries(leaktest PRIVATE gc)
 add_test(NAME leaktest COMMAND leaktest)

 add_executable(middletest tests/middle.c)
 target_link_libraries(middletest PRIVATE gc)
 add_test(NAME middletest COMMAND middletest)

 add_executable(realloc_test tests/realloc_test.c)
 target_link_libraries(realloc_test PRIVATE gc)
 add_test(NAME realloc_test COMMAND realloc_test)

 add_executable(smashtest tests/smash_test.c)
 target_link_libraries(smashtest PRIVATE gc)
 add_test(NAME smashtest COMMAND smashtest)

 if (NOT (BUILD_SHARED_LIBS AND WIN32))
   add_library(staticrootslib_test tests/staticrootslib.c)
   target_link_libraries(staticrootslib_test PRIVATE gc)
   add_library(staticrootslib2_test tests/staticrootslib.c)
   target_compile_options(staticrootslib2_test PRIVATE "-DSTATICROOTSLIB2")
   target_link_libraries(staticrootslib2_test PRIVATE gc)
   add_executable(staticrootstest tests/staticrootstest.c)
   target_compile_options(staticrootstest PRIVATE "-DSTATICROOTSLIB2")
   target_link_libraries(staticrootstest PRIVATE
                         gc staticrootslib_test staticrootslib2_test)
   add_test(NAME staticrootstest COMMAND staticrootstest)
 endif()

 if (enable_gc_debug)
   add_executable(tracetest tests/trace_test.c)
   target_link_libraries(tracetest PRIVATE gc)
   add_test(NAME tracetest COMMAND tracetest)
 endif()

 if (enable_threads)
   add_executable(test_atomic_ops tests/test_atomic_ops.c)
   target_link_libraries(test_atomic_ops PRIVATE gc)
   add_test(NAME test_atomic_ops COMMAND test_atomic_ops)

   add_executable(threadleaktest tests/thread_leak_test.c)
   target_link_libraries(threadleaktest PRIVATE gc ${THREADDLLIBS_LIST})
   add_test(NAME threadleaktest COMMAND threadleaktest)

   if (NOT WIN32)
     add_executable(threadkey_test tests/threadkey_test.c)
     target_link_libraries(threadkey_test PRIVATE gc ${THREADDLLIBS_LIST})
     add_test(NAME threadkey_test COMMAND threadkey_test)
   endif()

   add_executable(subthreadcreate_test tests/subthread_create.c)
   target_link_libraries(subthreadcreate_test PRIVATE gc ${THREADDLLIBS_LIST})
   add_test(NAME subthreadcreate_test COMMAND subthreadcreate_test)

   add_executable(initsecondarythread_test tests/initsecondarythread.c)
   target_link_libraries(initsecondarythread_test
                         PRIVATE gc ${THREADDLLIBS_LIST})
   add_test(NAME initsecondarythread_test COMMAND initsecondarythread_test)
 endif(enable_threads)

 if (enable_cplusplus)
   add_executable(test_cpp WIN32 tests/test_cpp.cc)
   target_link_libraries(test_cpp PRIVATE gc gccpp)
   add_test(NAME test_cpp COMMAND test_cpp)
 endif()

 if (enable_disclaim)
   add_executable(disclaim_bench tests/disclaim_bench.c)
   target_link_libraries(disclaim_bench PRIVATE gc)
   add_test(NAME disclaim_bench COMMAND disclaim_bench)

   add_executable(disclaim_test tests/disclaim_test.c)
   target_link_libraries(disclaim_test PRIVATE gc ${THREADDLLIBS_LIST})
   add_test(NAME disclaim_test COMMAND disclaim_test)

   add_executable(disclaim_weakmap_test tests/disclaim_weakmap_test.c)
   target_link_libraries(disclaim_weakmap_test
                         PRIVATE gc ${THREADDLLIBS_LIST})
   add_test(NAME disclaim_weakmap_test COMMAND disclaim_weakmap_test)
 endif()
endif(build_tests)

if (enable_docs)
 # Note: documentation which is not installed: README.QUICK
 install(FILES AUTHORS README.md
         DESTINATION "${CMAKE_INSTALL_DOCDIR}")
 install(DIRECTORY doc/ DESTINATION "${CMAKE_INSTALL_DOCDIR}"
         FILES_MATCHING
           PATTERN "README.*"
           PATTERN "*.md")

 install(FILES doc/gc.man DESTINATION "${CMAKE_INSTALL_MANDIR}/man3"
         RENAME gc.3)
endif(enable_docs)

# CMake config/targets files.
install(EXPORT BDWgcTargets FILE BDWgcTargets.cmake
       NAMESPACE BDWgc:: DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/bdwgc")

configure_package_config_file("${CMAKE_CURRENT_SOURCE_DIR}/Config.cmake.in"
       "${CMAKE_CURRENT_BINARY_DIR}/BDWgcConfig.cmake"
       INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/bdwgc"
       NO_SET_AND_CHECK_MACRO)

write_basic_package_version_file(
       "${CMAKE_CURRENT_BINARY_DIR}/BDWgcConfigVersion.cmake"
       VERSION "${PACKAGE_VERSION}" COMPATIBILITY AnyNewerVersion)

install(FILES "${CMAKE_CURRENT_BINARY_DIR}/BDWgcConfig.cmake"
             "${CMAKE_CURRENT_BINARY_DIR}/BDWgcConfigVersion.cmake"
       DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/bdwgc")

export(EXPORT BDWgcTargets
      FILE "${CMAKE_CURRENT_BINARY_DIR}/BDWgcTargets.cmake")

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