Log Message:
Update to 7.4.0:

== [7.4.0] 2013-11-17 ==

* Add 'bytes reclaimed' counters to public GC_prof_stats_s.
* Add AArch64 (64-bit ARM) target support.
* Add GC_LONG_REFS_NOT_NEEDED ifdefs to exclude long link functionality.
* Add GC_get_prof_stats[_unsafe]() to GC public API.
* Add GC_push_all/conditional() to GC public API.
* Add assertion on number_of_objs to GC_extend_size_map.
* Add assertion to GC_enable() ensuring no counter underflow.
* Add assertion to LOCK definition that lock is not already held.
* Add assertion to LONG_MULT and remove useless assert in PUSH_CONTENTS_HDR.
* Add double-lock assertion to GC_acquire_mark_lock.
* Add manual POSIX fork handling support (Android).
* Add note about 'pkg-config' solving problem with autoconf 2.68 or older.
* Add public GC_set/get_abort_func to replace default GC_on_abort.
* Add public GC_start_mark_threads() to allow parallel marker in fork child.
* Add public setter and getter for GC_push_other_roots.
* Add support of Android logger.
* Add tests for GC_register/move/unregister_long_link.
* Add thread suspend/resume signals public setters (POSIX threads).
* Added long weakref support.
* Adjust GC_dont_expand/gc/precollect and GC_print_stats type to match gc.h.
* Adjust README.md title and references to doc .html files in it.
* Adjust build scripts to enable additional test library in staticrootstest.
* Adjust logged messages in start_mark_threads and GC_thr_init.
* Adjust printf format specifiers in GC_print_trace.
* Allow not to rely on __data_start value (Linux).
* Allow pthread_kill error code logging in GC_suspend/resume (debugging).
* Allow to compile GC_inner_start_routine aside from extra/gc.c.
* Allow to omit libc atexit() call.
* Avoid LOCK/UNLOCK hard-coding in gc_locks.h for PS3 target.
* Better document GC_warn_proc in gc.h.
* Call GC_on_abort (with NULL argument) on exit(1).
* Call GC_stats/verbose_log_printf instead of GC_log_printf if print_stats.
* Change policy regarding version numbers ("micro" part instead of \ 
"alpha").
* Changed C99-style designated init of GC_dl_hashtbl struct to use C89-style.
* Check GC_base result in GC_print_all_smashed_proc.
* Check that SIG_SUSPEND and SIG_THR_RESTART are different (Pthreads).
* Check traceable_allocator.allocate result before dereference in test_cpp.
* Code refactoring of GC_x_printf (move shared code to macro).
* Convert readme to markdown.
* Default to use libc_stack_end in single-threaded GC on glibc targets.
* Define GC_VSNPRINTF internal macro in misc.c (code refactoring).
* Define functions in darwin_semaphore.h as inline instead of static.
* Define old_bus_handler static variable only if used (Unix).
* Detect dladdr() presence by configure.
* Disable find-leak GC_gcollect on GC abnormal EXIT.
* Do not define _setjmp/_longjmp macros in mach_dep.c.
* Do not duplicate android_log_write output to GC log file (Android).
* Do not include sigcontext.h if NO_SIGCONTEXT_H (Linux).
* Do not set GC_lock_holder by call_with_alloc_lock if assertions disabled.
* Do not use pthread_getattr_np if NO_PTHREAD_GETATTR_NP specified.
* Elaborate comment on dependencies in autogen.sh.
* Eliminate 'cast from int to pointer' warning in GC_exclude_static_roots.
* Eliminate 'missing exception specification' warning in gc_cpp.cc (Clang).
* Eliminate 'uninitialized variable use' warning in test_printf (cord).
* Eliminate 'unused result' compiler warning in main() of test_cpp.
* Eliminate 'unused value' compiler warning in GC_stop_world (Pthreads).
* Eliminate 'unused variable' compiler warning in start_mark_threads (HP/UX).
* Eliminate Clang warning for GC_pthread_exit attribute.
* Eliminate GCC warning about uninitialized 'hhdr' in GC_allochblk_nth.
* Eliminate GCC warning in GC_get_main_stack_base (OpenBSD).
* Eliminate GCC warnings in setjmp_t.c, test_cpp and cord 'de' app.
* Eliminate GC_first_nonempty atomic value reload in GC_mark_local assertion.
* Eliminate SIGBUS-related dead code in GC_write_fault_handler (Linux).
* Eliminate warning and simplify expression in GC_init_explicit_typing.
* Enable 'force GC at every GC_malloc' debug-related functionality.
* Enable on-demand debug logging in GC_FindTopOfStack (Darwin).
* Enable prefetch operations by default (GCC 3.0+).
* Enable staticrootstest for the case of GC shared library build.
* Enable thread-local allocation support for Clang on Cygwin.
* Explicitly specify that Darwin, Linux and Solaris platforms have dladdr.
* Fix ABORT definition for mingw32ce (WinCE).
* Fix AM_CONFIG_HEADER in configure for autoconf-2.69-1.
* Fix GC_CreateThread and GC_beginthreadex definition for Cygwin.
* Fix GC_INIT_CONF_ROOTS in gc.h for Android.
* Fix GC_INLINE definition to comply with ISO C90 standard (GCC).
* Fix GC_remove_all_threads_but_me for Android (fork support).
* Fix debug_register_displacement calls from GC_debug_generic_malloc_inner.
* Fix dyn_load.c compilation for Android 4.3.
* Fix make disclaim_test to link with new GNU ld linking rules.
* Improve GC error printing atomicity in GC_debug_X and GC_print_obj.
* Improve GC output atomicity in GC_print_obj, GC_print_all_errors.
* Improve debug-only messages of add/remove_roots and init_linux_data_start.
* Improve fork test logging in gctest.
* Improve logged messages about heap size and usage.
* Improve logging for Android differentiating messages by log level.
* Improve staticrootstest (add global data to library, add lib w/o GC_INIT).
* Improve staticrootstest checks (tests).
* Include "config.h" instead of "private/config.h" on \ 
HAVE_CONFIG_H.
* Include proper header file in 'tools' for configuration macros.
* Include pthread_np.h from pthread_stop_world.c on OpenBSD.
* Log error messages to stderr instead of stdout in tests.
* Make GC_generic_malloc_ignore_off_page() public.
* Make GC_mark_lock_holder variable static.
* Make GC_print_trace always thread-safe and remove 'lock' argument.
* Mark GC_started_thread_while_stopped() as GC_INNER.
* Minimize code duplication in GC_mark_and_push.
* Move 'include setjmp.h' from mach_dep.c to gc_priv.h.
* Move GC_OPENBSD_UTHREADS definition to private/gcconfig.h (OpenBSD).
* Move GC_get_suspend/thr_restart_signal to misc.c for NaCl and OpenBSD.
* Move LOCK/UNLOCK from GC_unregister_disappearing_link_inner outer.
* Port BDWGC to Android/x86.
* Postpone the suspend signal in GC_dirty_init only if used to stop world.
* Prepend '#' symbol to GC number in logged messages.
* Prevent POSIX fork if mprotect_thread is started (Darwin).
* Prevent abort on GC_err/warn_printf write failure.
* Prevent misleading AC_MSG_ERROR/AS_IF errors reported in configure.ac.
* Put gc_cpp symbols into 'boehmgc' namespace if GC_NAMESPACE defined.
* Recognize GC_DONT_GC macro in gc.h (causes GC_INIT to turn off GC).
* Recognize GC_SIG_SUSPEND and GC_SIG_THR_RESTART tuning macros in gc.h.
* Redirect WRITE to __android_log_write if GC_ANDROID_LOG (Android).
* Refine comment of GC_is_heap_ptr and GC_thread_is_registered in gc.h.
* Register dynamic libraries via dl_iterate_phdr on Android and OpenBSD.
* Remove DebugBreak on WriteFile failure (Win32).
* Remove GC_BUILD definition from build scripts.
* Remove abort on open log failure from GC_write (Win32).
* Remove configure.ac outdated revision number.
* Remove nested EXPECT in GC_core_finalized_malloc.
* Remove nested always-false ifdef for HPUX and FREEBSD.
* Remove redundant GC_err_printf before abort.
* Remove unused UTHREAD_SP_OFFSET macro (OpenBSD).
* Rename subthread_create to subthreadcreate_test (Makefile).
* Replace GC_COND_LOG_PRINTF calls with WARN for allocation failure messages.
* Replace GC_log/err_printf() followed by ABORT with ABORT_ARGn().
* Replace GC_stats_log_printf with GC_DBG/INFOLOG_PRINTF.
* Replace SIG_SUSPEND/THR_RESTART macros to variables in pthread_stop_world.
* Replace Win32 GC_delete_gc_thread with GC_delete_gc_thread_no_free.
* Replace conditional GC_log_printf calls with GC_COND/VERBOSE_LOG_PRINTF.
* Replace sprintf with defensive snprintf.
* Replace var-args GC_noop with GC_noop6 (to eliminate Clang warning).
* Simplify LOCK/UNLOCK macro definition for static code analysis tools.
* Specify GC_malloc result is unused in some tests.
* Specify GC_pthread_join result is unused in threadkey_test.
* Specify LT_INIT in configure.ac.
* Start of port to QNX.
* Support rthreads introduced in OpenBSD 5.2+.
* Suppress 'GC_dont_gc deprecated' warning in gc.h if GC_DONT_GC.
* Tag GC malloc routines with alloc_size attribute for Clang 3.2+.
* Test NO_WRAP_MARK_SOME macro to suppress WRAP_MARK_SOME-specific code.
* Turn off GC_LOOP_ON_ABORT functionality if GC compiled with NO_DEBUGGING.
* Turn on world-stop delay logging at debug level by default for Android.
* Use EXPECT in GC_COND/VERBOSE_LOG_PRINTF.
* Use GC_log_printf for logging instead of GC_[err_]printf.
* Use compiler TLS for Android NDK gcc/arm.
* Use memcpy (BCOPY) instead of strcpy (to suppress GCC warning).
* Use pthread API to operate thread-local data on Linux if no compiler TLS.
* Workaround 'ELF_DATA/EM_ALPHA redefined' warning in Android linker.h.
* Workaround 'unresolved __tls_get_addr' error for Android NDK Clang.

== [7.3alpha2] 2012-05-11 ==

* Add 'const' qualifier to pointer argument of some API functions.
* Add GC_UNDERSCORE_STDCALL, UNICODE macro templates to configure (Win32).
* Add GC_get_thr_restart_signal, GC_thread_is_registered to GC API.
* Add GC_is_heap_ptr, GC_move_disappearing_link to GC API.
* Add SHORT_DBG_HDRS macro template to configure.
* Add Symbian port to mainline.
* Add TODO file.
* Add assertion ensuring proper alignment of 'pushed' GC symbols.
* Add assertion in GC_getspecific on qtid.
* Add assertion to GC_incremental_protection_needs, refine documentation.
* Add assertion to check GC_large_free_bytes by GC_finish_collection.
* Add configure option to compile all library .c files into single gc.o.
* Add cordtest to make check.
* Add disclaim callbacks for efficient finalization (ENABLE_DISCLAIM).
* Add finalization.html to 'doc' folder.
* Add javaxfc.h to the installation set of GC header files (configure).
* Add on-heap-resize event notification to API.
* Adjust GC_log_printf format specifiers (regarding signed/unsigned long).
* Adjust GC_requested_heapsize on GC_init if GC_INITIAL_HEAP_SIZE given.
* Allow GC_exclude_static_roots() region start to be unaligned.
* Allow Win32 DllMain chaining on the client side.
* Allow to exclude finalization support by GC_NO_FINALIZATION macro.
* Allow to get memory via Win32 VirtualAlloc (USE_WINALLOC) on Cygwin.
* Avoid unnecessary GC_find_limit invocation if GC_no_dls.
* Avoid use of deprecated GC_dont_gc and GC_stackbottom in gctest.
* Cast pointers to word (instead of unsigned long) in specific.h.
* Changed the order in autogen.sh so ltmain exists in time for automake.
* Declare privately and use handy GC_base_C() for constant object pointers.
* Define GC_DLL if DLL_EXPORT at GC build (for Cygwin/MinGW).
* Define GC_READ_ENV_FILE in configure for WinCE unless gc-debug is off.
* Do not compile backgraph.c unless configure '--enable-gc-debug'.
* Do not compile pthread_stop_world.c for Cygwin/Darwin (configure).
* Do not install ancient new_gc_alloc.h broken for modern STL (configure).
* Enable GC_MIN_MARKERS to set minimal number of pthread-based markers.
* Enable PARALLEL_MARK and THREAD_LOCAL_ALLOC for FreeBSD in configure.
* Enable parallel mark by default in configure (Darwin/Linux/Solaris/Win32).
* Export GC_is_marked, GC_clear/set_mark_bit (for mark-bit manipulation).
* Extend thread-related debug messages.
* Fix 'configure --enable-cplusplus' for Cygwin/MinGW.
* Fix DATASTART (and other minor improvements) for NaCl target.
* Fix GC_setspecific to prevent garbage collection inside.
* Fix compiler warning in cordtest.
* Fix minor warnings reported by GCC with '-pedantic' option.
* Fix static data roots registration on Android (if GC is shared).
* Implement GC_get_stack_base for Darwin for single-threaded mode.
* Improve GC_allochblk algorithm of block splitting when unmapping enabled.
* Improve GC_collect_or_expand algorithm for many finalizers registered case.
* In tests, print a message in case a test is a no-op.
* Instruct configure to hide internal libgc.so symbols if supported by GCC.
* Log amount of unmapped memory (if enabled) on marking-for-collection.
* Make __data_start a weak symbol to allow loading modules on mips.
* Move "cord" library tests to "cord/tests" folder.
* Move asm machine-dependent files to "src" folder.
* Move build tools sources to "tools" folder.
* Move cord_pos.h to public headers folder.
* Open log file in APPEND mode on Win32 (similar that on Unix/Cygwin).
* Optimize some functions by moving pthread_self calls out of LOCK section.
* Place only major per-release changes description to ChangeLog (this file).
* Prevent compiler warnings in GC_FindTopOfStack and GC_ports (Darwin).
* Recognize GC_LOG_TO_FILE_ALWAYS macro to log to 'gc.log' by default.
* Remove all auto-generated files from the repo.
* Remove binary icon file for de_win.
* Remove cordtest from "cord" library.
* Remove duplicate MacOS_Test_config.h file.
* Remove gc_amiga_redirects.h (included internally) from public headers.
* Remove obsolete Makefile.DLL (superseded by Cygwin/MinGW configure).
* Remove obsolete unused asm files for ALPHA, HPUX, SGI, RS6000, ULTRIX.
* Remove unsupported MMAP_STACKS (specific to Solaris threads).
* Remove unused ancient SILENT, __STDC__, NO_SIGNALS macros.
* Replace ARGSUSED comment-based annotation with GCC 'unused' attribute.
* Replace GC_ms_entry declaration with opaque definition for public API.
* Replace long GC_markers global variable with int GC_markers_m1.
* Replace pointer relational comparisons with non-pointer ones.
* Replace printf PRIxMAX specifier with '%p' for thread id debug output.
* Require autoconf 2.61 instead of v2.64.
* Simplify autogen.sh (use autoreconf).
* Split GC_abort with GC_on_abort and abort() invoked from ABORT.
* Support GC_ATTR_MALLOC for MS VisualStudio.
* Tag auxiliary malloc-like API functions with 'malloc' attribute.
* Tag deprecated variables in GC API.
* Tag must-be-non-null arguments of GC API functions.
* Turn on "extra" GCC warnings.
* Turn on unused-parameter checking for GCC.
* Update AUTHORS file.
* Use EXPECT for checking various 'initialized' boolean variables.
* Use USE_COMPILER_TLS on Cygwin.
* Use pthread_key for thread-local storage on FreeBSD.
* Use union of AO_t and word to favor strict-aliasing compiler optimization.