# interception can be used on a few platforms.
# -DGC_THREADS should set the appropriate one of the below macros,
# except -DGC_WIN32_PTHREADS, which must be set explicitly.
-# -DGC_SOLARIS_PTHREADS enables support for Solaris pthreads.
-# (Clients should also define GC_SOLARIS_THREADS and then include
-# gc.h before performing thr_ or dl* or GC_ operations.)
+# -DGC_SOLARIS_THREADS enables support for Solaris pthreads.
# Must also define -D_REENTRANT.
# -DGC_IRIX_THREADS enables support for Irix pthreads. See README.irix.
# -DGC_HPUX_THREADS enables support for HP/UX 11 pthreads.
# cache footprint. Normally it is best to let this decision be
# made automatically depending on platform.
# -DMARK_BIT_PER_OBJ requests that a mark bit be allocated for each
-# object instead of allocation granule. The opposiet of
+# object instead of allocation granule. The opposite of
# MARK_BIT_PER_GRANULE.
# -DHBLKSIZE=ddd, where ddd is a power of 2 between 512 and 16384, explicitly
# sets the heap block size. Each heap block is devoted to a single size and
# the most likely page size. Otherwise large values result in more
# fragmentation, but generally better performance for large heaps.
# -DUSE_MMAP use MMAP instead of sbrk to get new memory.
-# Works for Solaris and Irix.
+# Works for Linux, FreeBSD, Cygwin, Solaris and Irix.
# -DUSE_MUNMAP causes memory to be returned to the OS under the right
-# circumstances. This currently disables VM-based incremental collection.
-# This is currently experimental, and works only under some Unix,
-# Linux and Windows versions. Requires -DUSE_MMAP, even under Windows,
-# where USE_MMAP doesn't do anything.
+# circumstances. This currently disables VM-based incremental collection
+# (except for Win32 with GetWriteWatch available).
+# Works under some Unix, Linux and Windows versions.
+# Requires -DUSE_MMAP except for Windows.
# -DMMAP_STACKS (for Solaris threads) Use mmap from /dev/zero rather than
# GC_scratch_alloc() to get stack memory.
# -DPRINT_BLACK_LIST Whenever a black list entry is added, i.e. whenever
# the garbage collector detects a value that looks almost, but not quite,
# like a pointer, print both the address containing the value, and the
-# value of the near-bogus-pointer. Can be used to identifiy regions of
+# value of the near-bogus-pointer. Can be used to identify regions of
# memory that are likely to contribute misidentified pointers.
# -DKEEP_BACK_PTRS Add code to save back pointers in debugging headers
# for objects allocated with the debugging allocator. If all objects
# -DCHECKSUMS reports on erroneously clear dirty bits, and unexpectedly
# altered stubborn objects, at substantial performance cost.
# Use only for debugging of the incremental collector.
+# Not compatible with USE_MUNMAP or threads.
# -DGC_GCJ_SUPPORT includes support for gcj (and possibly other systems
# that include a pointer to a type descriptor in each allocated object).
# Building this way requires an ANSI C compiler.
# -DTHREAD_LOCAL_ALLOC defines GC_malloc(), GC_malloc_atomic()
# and GC_gcj_malloc() to use a per-thread set of free-lists.
# These then allocate in a way that usually does not involve
-# acquisition of a global lock. Currently supported only on platforms
-# such as Linux that use pthread_support.c. Recommended for multiprocessors.
+# acquisition of a global lock. Recommended for multiprocessors.
# Requires explicit GC_INIT() call, unless REDIRECT_MALLOC is
# defined and GC_malloc is used first.
# -DUSE_COMPILER_TLS causes thread local allocation to use compiler-supported
# may help performance on recent Linux installations. (It failed for
# me on RedHat 8, but appears to work on RedHat 9.)
# -DPARALLEL_MARK allows the marker to run in multiple threads. Recommended
-# for multiprocessors. Currently requires Linux on X86 or IA64, though
-# support for other Posix platforms should be fairly easy to add,
-# if the thread implementation is otherwise supported.
+# for multiprocessors.
# -DNO_GETENV prevents the collector from looking at environment variables.
# These may otherwise alter its configuration, or turn off GC altogether.
# I don't know of a reason to disable this, except possibly if the
# for applications that don't support proper stack unwinding.
# -DUSE_PROC_FOR_LIBRARIES Causes the Linux collector to treat writable
# memory mappings (as reported by /proc) as roots, if it doesn't have
-# otherinformation about them. It no longer traverses dynamic loader
+# other information about them. It no longer traverses dynamic loader
# data structures to find dynamic library static data. This may be
# required for applications that store pointers in mmapped segments without
# informaing the collector. But it typically performs poorly, especially
# since it will scan inactive but cached NPTL thread stacks completely.
# -DNO_PROC_STAT Causes the collector to avoid relying on Linux'
# /proc/self/stat.
+# -DNO_GETCONTEXT Causes the collector to not assume the existence of
+# the getcontext() function on linux-like platforms. This currently
+# happens implicitly on Darwin, Hurd, or ARM or MIPS hardware.
+# It is explicitly needed for some old versions of FreeBSD.
+# -DSTATIC=static Causes various GC_ symbols that could logically be
+# declared static to be declared (this is the default if -DNO_DEBUGGING is
+# specified). Reduces the number of visible symbols (letting the optimizer
+# do its work better), which is probably cleaner, but may make some kinds of
+# debugging and profiling harder.
+# -DDONT_USE_USER32_DLL (Win32 only) Don't use "user32" DLL import library
+# (containing MessageBox() entry); useful for a static GC library.
+# -DGC_PREFER_MPROTECT_VDB Choose MPROTECT_VDB manually in case of multiple
+# virtual dirty bit strategies are implemented (at present useful on Win32
+# to force MPROTECT_VDB strategy instead of the default GWW_VDB one).
#
CXXFLAGS= $(CFLAGS)
PCR-Makefile SMakefile.amiga Makefile.DLLs \
digimars.mak Makefile.direct NT_STATIC_THREADS_MAKEFILE \
NT_X64_STATIC_THREADS_MAKEFILE NT_X64_THREADS_MAKEFILE \
- configure_atomic_ops.sh
-# Makefile and Makefile.direct are copies of each other.
+ build_atomic_ops.sh build_atomic_ops.sh.cygwin
OTHER_FILES= Makefile setjmp_t.c callprocs \
MacProjects.sit.hqx MacOS.c \
# if AO_INSTALL_DIR doesn't exist, we assume that it is pointing to
# the default location, and we need to build
$(AO_INSTALL_DIR):
- CC=$(CC) $(srcdir)/configure_atomic_ops.sh
- cd $(AO_SRC_DIR); $(MAKE) CC=$(CC) install
+ CC=$(CC) MAKE=$(MAKE) $(srcdir)/build_atomic_ops.sh
LEAKFLAGS=$(CFLAGS) -DFIND_LEAK
projects / cacao.git / blobdiff