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-rw-r--r--graphics/asymptote/gc/configure.ac1214
1 files changed, 1214 insertions, 0 deletions
diff --git a/graphics/asymptote/gc/configure.ac b/graphics/asymptote/gc/configure.ac
new file mode 100644
index 0000000000..3d30c9c13c
--- /dev/null
+++ b/graphics/asymptote/gc/configure.ac
@@ -0,0 +1,1214 @@
+# Copyright (c) 1999-2001 by Red Hat, Inc. All rights reserved.
+# Copyright (c) 2005-2009 Hewlett-Packard Development Company, L.P.
+# Copyright (c) 2009-2021 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.
+
+dnl Process this file with autoconf to produce configure.
+
+dnl Initialization.
+AC_INIT([gc],[8.2.8],[https://github.com/ivmai/bdwgc/issues])
+dnl Version must conform to: [0-9]+[.][0-9]+[.][0-9]+
+
+AC_CONFIG_SRCDIR(gcj_mlc.c)
+AC_CONFIG_MACRO_DIR([m4])
+AC_CANONICAL_TARGET
+AC_PREREQ([2.71])
+GC_SET_VERSION
+AM_INIT_AUTOMAKE([foreign nostdinc subdir-objects])
+AC_CONFIG_HEADERS([include/config.h])
+AM_MAINTAINER_MODE
+
+AC_SUBST(PACKAGE)
+AC_SUBST(GC_VERSION)
+
+AM_PROG_CC_C_O
+AC_PROG_CXX
+AM_PROG_AS
+AC_PROG_INSTALL
+LT_INIT([disable-static])
+# Only the shared libraries are produced by default, use "--enable-static"
+# option to override it.
+dnl Note: If Autoconf reports that LIBTOOL (or AC_ENABLE_SHARED, or
+dnl LT_INIT) is undefined, Libtool installation should be checked.
+
+# Special CFLAGS to use when building
+gc_cflags=""
+
+# Set to "yes" on platforms where mmap should be used instead of sbrk.
+# This will define USE_MMAP.
+gc_use_mmap=""
+
+# We should set -fexceptions if we are using gcc and might be used
+# inside something like gcj. This is the zeroth approximation:
+if test :"$GCC": = :yes: ; then
+ gc_cflags="${gc_cflags} -fexceptions"
+else
+ case "$host" in
+ hppa*-*-hpux* )
+ if test :$GCC: != :"yes": ; then
+ gc_cflags="${gc_cflags} +ESdbgasm"
+ fi
+ # :TODO: actually we should check using Autoconf if
+ # the compiler supports this option.
+ ;;
+ esac
+fi
+
+# target_optspace --enable-target-optspace ("yes", "no", "")
+case "${target_optspace}:${host}" in
+ yes:*)
+ gc_cflags="${gc_cflags} -Os"
+ ;;
+ :m32r-* | :d10v-* | :d30v-*)
+ gc_cflags="${gc_cflags} -Os"
+ ;;
+ no:* | :*)
+ # Nothing.
+ ;;
+esac
+
+# Set any host dependent compiler flags.
+case "${host}" in
+ mips-tx39-*|mipstx39-unknown-*)
+ gc_cflags="${gc_cflags} -G 0"
+ ;;
+ *)
+ ;;
+esac
+
+AC_MSG_CHECKING([for emscripten])
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+# ifndef __EMSCRIPTEN__
+# error This is not Emscripten
+# endif
+ ]])], [emscripten=yes], [emscripten=no])
+AM_CONDITIONAL(EMSCRIPTEN, test x$emscripten = xyes)
+AC_MSG_RESULT([$emscripten])
+
+AC_ARG_ENABLE(emscripten-asyncify,
+ [AS_HELP_STRING([--enable-emscripten-asyncify],
+ [use Emscripten asyncify feature])])
+# Use this option if your program is targeting -sASYNCIFY. The latter is
+# required to scan the stack, ASYNCIFY_STACK_SIZE is probably needed for
+# gctest only.
+AS_IF([test "${emscripten}" = yes -a "${enable_emscripten_asyncify}" = yes],
+ [gc_cflags="${gc_cflags} -DEMSCRIPTEN_ASYNCIFY"
+ gc_cflags="${gc_cflags} -sASYNCIFY -sASYNCIFY_STACK_SIZE=128000"])
+
+GC_CFLAGS=${gc_cflags}
+AC_SUBST(GC_CFLAGS)
+
+dnl Extra user-defined flags to pass both to C and C++ compilers.
+AC_SUBST([CFLAGS_EXTRA])
+
+AC_ARG_ENABLE(threads,
+ [AS_HELP_STRING([--enable-threads=TYPE], [choose threading package])],
+ THREADS=$enableval,
+ [ AC_MSG_CHECKING([for thread model used by GCC])
+ THREADS=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
+ if test -z "$THREADS" -o "x$emscripten" = "xyes"; then
+ THREADS=no
+ fi
+ if test "$THREADS" = "posix"; then
+ case "$host" in
+ *-*-mingw*)
+ # Adjust thread model if cross-compiling for MinGW.
+ THREADS=win32
+ ;;
+ esac
+ fi
+ AC_MSG_RESULT([$THREADS]) ])
+
+AC_ARG_ENABLE(parallel-mark,
+ [AS_HELP_STRING([--disable-parallel-mark],
+ [do not parallelize marking and free list construction])],
+ [case "$THREADS" in
+ no | none | single)
+ if test "${enable_parallel_mark}" != no; then
+ AC_MSG_ERROR([Parallel mark requires --enable-threads=x spec])
+ fi
+ ;;
+ esac])
+
+AC_ARG_ENABLE(thread-local-alloc,
+ [AS_HELP_STRING([--disable-thread-local-alloc],
+ [turn off thread-local allocation optimization])],
+ [case "$THREADS" in
+ no | none | single)
+ if test "${enable_thread_local_alloc}" = yes; then
+ AC_MSG_ERROR(
+ [Thread-local allocation requires --enable-threads=x spec])
+ fi
+ ;;
+ esac])
+
+AC_ARG_ENABLE(threads-discovery,
+ [AS_HELP_STRING([--disable-threads-discovery],
+ [disable threads discovery in GC])])
+if test "${enable_threads_discovery}" = no; then
+ AC_DEFINE([GC_NO_THREADS_DISCOVERY], 1,
+ [Disable threads discovery in GC.])
+fi
+
+AC_ARG_ENABLE(cplusplus,
+ [AS_HELP_STRING([--enable-cplusplus], [install C++ support])])
+
+dnl Features which may be selected in the following thread-detection switch.
+AH_TEMPLATE([PARALLEL_MARK], [Define to enable parallel marking.])
+AH_TEMPLATE([THREAD_LOCAL_ALLOC],
+ [Define to enable thread-local allocation optimization.])
+AH_TEMPLATE([USE_COMPILER_TLS],
+ [Define to use of compiler-support for thread-local variables.])
+
+dnl Thread selection macros.
+AH_TEMPLATE([GC_THREADS], [Define to support platform-specific
+ threads.])
+AH_TEMPLATE([GC_WIN32_PTHREADS],
+ [Define to support pthreads-win32 or winpthreads.])
+
+dnl System header feature requests.
+AH_TEMPLATE([_POSIX_C_SOURCE], [The POSIX feature macro.])
+AH_TEMPLATE([_PTHREADS], [Indicates the use of pthreads (NetBSD).])
+
+dnl Win32-specific API usage controls.
+AH_TEMPLATE([GC_UNDERSCORE_STDCALL],
+ [Explicitly prefix exported/imported WINAPI symbols with '_'.])
+AH_TEMPLATE([UNICODE],
+ [Use Unicode (W) variant of Win32 API instead of ASCII (A) one.])
+
+dnl GC API symbols export control.
+AH_TEMPLATE([GC_DLL],
+ [Define to build dynamic libraries with only API symbols exposed.])
+
+dnl Check for a flavor of supported inline keyword.
+old_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS $CFLAGS_EXTRA"
+AC_C_INLINE
+CFLAGS="$old_CFLAGS"
+
+THREADDLLIBS=
+need_atomic_ops_asm=false
+need_lib_rt=false
+compile_asm=false
+use_parallel_mark=no
+use_thread_local_alloc=no
+# Libraries needed to support dynamic loading and/or threads.
+case "$THREADS" in
+ no | none | single)
+ THREADS=none
+ ;;
+ posix | pthreads)
+ THREADS=posix
+ default_threadlibs=false
+ # Common defines for most POSIX platforms.
+ case "$host" in
+ *-*-aix* | *-*-android* | *-*-cygwin* | *-*-darwin* | *-*-dragonfly* | \
+ *-*-freebsd* | *-*-haiku* | *-*-hpux11* | *-*-irix* | \
+ *-*-kfreebsd*-gnu | *-*-gnu* | *-*-*linux* | *-*-msys* | *-*-nacl* | \
+ *-*-netbsd* | *-*-openbsd* | *-*-osf* | *-*-solaris*)
+ AC_DEFINE(GC_THREADS)
+ AC_DEFINE([_REENTRANT], [1],
+ [Required define if using POSIX threads.])
+ use_parallel_mark=$enable_parallel_mark
+ use_thread_local_alloc=$enable_thread_local_alloc
+ default_threadlibs=true
+ AC_MSG_WARN("Explicit GC_INIT() calls may be required.")
+ ;;
+ esac
+ AC_CHECK_LIB(pthread, pthread_self, THREADDLLIBS="-lpthread",,)
+ case "$host" in
+ *-*-hpux11*)
+ AC_MSG_WARN("Only HP/UX 11 POSIX threads are supported.")
+ AC_DEFINE(_POSIX_C_SOURCE,199506L)
+ THREADDLLIBS="-lpthread"
+ # HPUX needs REENTRANT for the _r calls.
+ need_lib_rt=true
+ ;;
+ *-*-openbsd*)
+ AM_CFLAGS="$AM_CFLAGS -pthread"
+ THREADDLLIBS=-pthread
+ ;;
+ *-*-freebsd*)
+ AM_CFLAGS="$AM_CFLAGS -pthread"
+ ;;
+ *-*-kfreebsd*-gnu)
+ AM_CFLAGS="$AM_CFLAGS -pthread"
+ THREADDLLIBS=-pthread
+ ;;
+ *-*-gnu*) # E.g. linux but excluding kfreebsd.
+ # The default THREADDLLIBS.
+ ;;
+ *-*-netbsd*)
+ AC_MSG_WARN("Only on NetBSD 2.0 or later.")
+ AC_DEFINE(_PTHREADS)
+ THREADDLLIBS="-lpthread"
+ need_lib_rt=true
+ ;;
+ *-*-solaris*)
+ THREADDLLIBS="-lpthread"
+ need_lib_rt=true
+ ;;
+ *-*-cygwin* | *-*-msys*)
+ # Cygwin doesn't have a real libpthread, so Libtool can't link
+ # against it.
+ THREADDLLIBS=""
+ win32_threads=true
+ ;;
+ *-*-mingw*)
+ AC_DEFINE(GC_WIN32_PTHREADS)
+ # Using pthreads-win32 (or other non-Cygwin pthreads) library.
+ THREADDLLIBS="-lpthread"
+ use_parallel_mark=$enable_parallel_mark
+ use_thread_local_alloc=$enable_thread_local_alloc
+ win32_threads=true
+ ;;
+ *-*-darwin*)
+ darwin_threads=true
+ ;;
+ *-*-osf*)
+ AM_CFLAGS="$AM_CFLAGS -pthread"
+ THREADDLLIBS="-lpthread"
+ need_lib_rt=true
+ ;;
+ *)
+ AS_IF([test x$default_threadlibs != xtrue],
+ [ AC_MSG_ERROR(
+ [Pthreads not supported by the GC on this platform]) ])
+ # The default THREADDLLIBS.
+ ;;
+ esac
+ case "$host" in
+ sparc*-*-solaris*)
+ if test "$GCC" != yes; then
+ need_atomic_ops_asm=true
+ fi
+ ;;
+ esac
+ ;;
+ mcf | win32)
+ AC_DEFINE(GC_THREADS)
+ use_parallel_mark=$enable_parallel_mark
+ if test "${enable_parallel_mark}" != no \
+ -o "${enable_shared}" != yes -o "${enable_static}" != no; then
+ # Imply THREAD_LOCAL_ALLOC unless GC_DLL.
+ use_thread_local_alloc=$enable_thread_local_alloc
+ fi
+ if test "${enable_win32_dllmain}" = yes; then
+ AC_DEFINE(GC_INSIDE_DLL, 1,
+ [Enable Win32 DllMain-based approach of threads registering.])
+ fi
+ win32_threads=true
+ AC_DEFINE([EMPTY_GETENV_RESULTS], [1],
+ [Wine getenv may not return NULL for missing entry.])
+ ;;
+ dgux386)
+ AC_DEFINE(GC_THREADS)
+ # Use pthread GCC switch
+ THREADDLLIBS=-pthread
+ use_parallel_mark=$enable_parallel_mark
+ use_thread_local_alloc=$enable_thread_local_alloc
+ AC_MSG_WARN("Explicit GC_INIT() calls may be required.")
+ AM_CFLAGS="-pthread $AM_CFLAGS"
+ ;;
+ aix)
+ THREADS=posix
+ THREADDLLIBS=-lpthread
+ AC_DEFINE(GC_THREADS)
+ AC_DEFINE(_REENTRANT)
+ use_parallel_mark=$enable_parallel_mark
+ use_thread_local_alloc=$enable_thread_local_alloc
+ ;;
+ rtems)
+ THREADS=posix
+ AC_DEFINE(GC_THREADS)
+ use_parallel_mark=$enable_parallel_mark
+ use_thread_local_alloc=$enable_thread_local_alloc
+ ;;
+ decosf1 | irix | mach | os2 | solaris | dce | vxworks)
+ AC_MSG_ERROR(thread package $THREADS not yet supported)
+ ;;
+ *)
+ AC_MSG_ERROR($THREADS is an unknown thread package)
+ ;;
+esac
+
+# Check whether -lrt linker option is needed to use clock_gettime.
+if test "x$need_lib_rt" != xtrue; then
+ AC_MSG_CHECKING(for clock_gettime without additional libraries)
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <time.h>],
+ [struct timespec t; clock_gettime(CLOCK_REALTIME, &t)])],
+ [AC_MSG_RESULT(yes)],
+ [AC_MSG_RESULT(no)
+ AC_CHECK_LIB(rt, clock_gettime, [need_lib_rt=true])])
+fi
+
+if test "x$need_lib_rt" = xtrue; then
+ THREADDLLIBS="$THREADDLLIBS -lrt"
+fi
+AC_SUBST(THREADDLLIBS)
+
+AM_CONDITIONAL(THREADS, test x$THREADS != xnone)
+AM_CONDITIONAL(PTHREADS, test x$THREADS = xposix)
+AM_CONDITIONAL(DARWIN_THREADS, test x$darwin_threads = xtrue)
+AM_CONDITIONAL(WIN32_THREADS, test x$win32_threads = xtrue)
+
+compiler_suncc=no
+pthread_start_standalone=no
+case "$host" in
+ *-*-*linux*)
+ # Turn on the workaround described in pthread_start.c.
+ AS_IF([test "$THREADS" = posix], [pthread_start_standalone=yes])
+ ;;
+ powerpc-*-darwin*)
+ powerpc_darwin=true
+ ;;
+ *-*-solaris*)
+ if test "$GCC" != yes; then
+ # Solaris SunCC
+ compiler_suncc=yes
+ CFLAGS="-O $CFLAGS"
+ fi
+ ;;
+ *-*-wince*)
+ if test "$enable_gc_debug" != "no"; then
+ AC_DEFINE([GC_READ_ENV_FILE], 1,
+ [Read environment variables from the GC 'env' file.])
+ fi
+ ;;
+esac
+AM_CONDITIONAL(PTHREAD_START_STANDALONE,
+ test x$pthread_start_standalone = xyes)
+
+if test "$GCC" = yes; then
+ # Output all warnings.
+ AC_MSG_CHECKING([whether compiler supports -Wextra])
+ old_CFLAGS="$CFLAGS"
+ CFLAGS="-Wextra $CFLAGS"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[ac_cv_cc_wextra=yes],[ac_cv_cc_wextra=no])
+ CFLAGS="$old_CFLAGS"
+ AC_MSG_RESULT($ac_cv_cc_wextra)
+ AS_IF([test "$ac_cv_cc_wextra" = yes], [WEXTRA="-Wextra"], [WEXTRA="-W"])
+ AC_MSG_CHECKING([whether compiler supports -Wpedantic])
+ CFLAGS="-Wpedantic -Wno-long-long $CFLAGS"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
+ extern int quiet;
+ ]])],[ac_cv_cc_pedantic=yes],[ac_cv_cc_pedantic=no])
+ CFLAGS="$old_CFLAGS"
+ AC_MSG_RESULT($ac_cv_cc_pedantic)
+ WPEDANTIC=
+ AS_IF([test "$ac_cv_cc_pedantic" = yes],
+ [WPEDANTIC="-Wpedantic -Wno-long-long"])
+ CFLAGS="-Wall $WEXTRA $WPEDANTIC $CFLAGS"
+ CXXFLAGS="-Wall $WEXTRA $WPEDANTIC $CXXFLAGS"
+fi
+
+AC_MSG_CHECKING(for xlc)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
+ #ifndef __xlC__
+ # error
+ #endif
+]])],[compiler_xlc=yes],[compiler_xlc=no])
+AC_MSG_RESULT($compiler_xlc)
+if test $compiler_xlc = yes -a "$powerpc_darwin" = true; then
+ # the darwin stack-frame-walking code is completely broken on xlc
+ AC_DEFINE([DARWIN_DONT_PARSE_STACK], 1, [See doc/README.macros.])
+fi
+
+# XLC neither requires nor tolerates the unnecessary assembler goop.
+# Similar for the Sun C compiler.
+AM_CONDITIONAL([ASM_WITH_CPP_UNSUPPORTED],
+ [test $compiler_xlc = yes -o $compiler_suncc = yes])
+
+if test "$GCC" = yes; then
+ # Disable aliasing optimization unless forced to.
+ AC_MSG_CHECKING([whether compiler supports -fno-strict-aliasing])
+ ac_cv_fno_strict_aliasing=no
+ for cflag in $CFLAGS; do
+ case "$cflag" in
+ -fstrict-aliasing)
+ # Opposite option already present
+ ac_cv_fno_strict_aliasing=skipped
+ break
+ ;;
+ esac
+ done
+ if test "$ac_cv_fno_strict_aliasing" != skipped; then
+ old_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -fno-strict-aliasing"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[ac_cv_fno_strict_aliasing=yes],[])
+ CFLAGS="$old_CFLAGS"
+ AS_IF([test "$ac_cv_fno_strict_aliasing" = yes],
+ [CFLAGS="$CFLAGS -fno-strict-aliasing"], [])
+ fi
+ AC_MSG_RESULT($ac_cv_fno_strict_aliasing)
+fi
+
+# Check for getcontext (uClibc can be configured without it, for example)
+AC_CHECK_FUNC([getcontext], [],
+ [ AC_DEFINE([NO_GETCONTEXT], [1], [Missing getcontext function.]) ])
+
+# Check whether dl_iterate_phdr exists (as a strong symbol).
+AC_CHECK_FUNCS([dl_iterate_phdr])
+
+case "$host" in
+# While IRIX 6 has libdl for the O32 and N32 ABIs, it's missing for N64
+# and unnecessary everywhere.
+ mips-sgi-irix6*) ;;
+# We never want libdl on darwin. It is a fake libdl that just ends up making
+# dyld calls anyway. The same applies to Cygwin.
+ *-*-cygwin* | *-*-darwin* | *-*-msys*)
+ ;;
+ *)
+ AC_CHECK_LIB(dl, dlopen, THREADDLLIBS="$THREADDLLIBS -ldl")
+ ;;
+esac
+
+case "$host" in
+ *-*-hpux*)
+ avoid_cpp_lib=yes;;
+ *)
+ avoid_cpp_lib=no;
+ ;;
+esac
+AM_CONDITIONAL(AVOID_CPP_LIB,test $avoid_cpp_lib = yes)
+
+# Check for various headers.
+AC_CHECK_HEADER([execinfo.h], [],
+ [ AC_DEFINE([GC_MISSING_EXECINFO_H], [1], [Missing execinfo.h header.]) ])
+
+# extra LD Flags which are required for targets
+case "${host}" in
+ *-*-darwin*)
+ extra_ldflags_libgc=-Wl,-single_module
+ ;;
+esac
+AC_SUBST(extra_ldflags_libgc)
+
+AC_SUBST(EXTRA_TEST_LIBS)
+
+target_all=libgc.la
+AC_SUBST(target_all)
+
+dnl If the target is an eCos system, use the appropriate eCos
+dnl I/O routines.
+dnl FIXME: this should not be a local option but a global target
+dnl system; at present there is no eCos target.
+TARGET_ECOS="no"
+AC_ARG_WITH(ecos,
+[ --with-ecos enable runtime eCos target support],
+TARGET_ECOS="$with_ecos"
+)
+
+addobjs=
+addlibs=
+CXXLIBS=
+
+case "$TARGET_ECOS" in
+ no)
+ ;;
+ *)
+ AC_DEFINE([ECOS], 1, [Define to enable eCos target support.])
+ AM_CPPFLAGS="-I${TARGET_ECOS}/include $AM_CPPFLAGS"
+ addobjs="$addobjs ecos.lo"
+ ;;
+esac
+
+AM_CONDITIONAL(CPLUSPLUS, test "${enable_cplusplus}" = yes)
+
+AC_ARG_ENABLE(throw-bad-alloc-library,
+ [AS_HELP_STRING([--disable-throw-bad-alloc-library],
+ [do not build C++ gctba library])])
+AM_CONDITIONAL(GC_TBA_LIBRARY,
+ test "${enable_cplusplus}" = yes \
+ -a "${enable_throw_bad_alloc_library}" != no)
+
+if test "$GCC" = yes; then
+ if test "${enable_cplusplus}" = yes; then
+ case "$host" in
+ *-*-cygwin* | *-*-mingw* | *-*-msys*)
+ AC_MSG_CHECKING([whether libsupc++ required])
+ SUPC="`$CXX -print-file-name=libsupc++.a 2>/dev/null`"
+ if test -n "$SUPC" -a "$SUPC" != "libsupc++.a"; then
+ AC_MSG_RESULT(yes)
+ CXXLIBS="-lsupc++"
+ else
+ AC_MSG_RESULT(no)
+ fi
+ ;;
+ esac
+ fi
+fi
+
+AC_SUBST(CXX)
+AC_SUBST(AM_CFLAGS)
+AC_SUBST(AM_CPPFLAGS)
+AC_SUBST(CXXLIBS)
+
+# Configuration of shared libraries
+#
+AC_MSG_CHECKING(whether to build shared libraries)
+AC_ENABLE_SHARED
+
+case "$host" in
+ alpha-*-openbsd*)
+ enable_shared=no
+ ;;
+ *)
+ ;;
+esac
+
+AC_MSG_RESULT($enable_shared)
+
+# Compile with GC_DLL defined unless building static libraries.
+if test "${enable_shared}" != no -a "${enable_static}" != yes; then
+ AC_DEFINE(GC_DLL)
+ if test "$GCC" = yes; then
+ # Pass -fvisibility=hidden option if supported
+ AC_MSG_CHECKING([whether compiler supports -fvisibility])
+ old_CFLAGS="$CFLAGS"
+ CFLAGS="-Werror -fvisibility=hidden $CFLAGS"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[ac_cv_fvisibility_hidden=yes],[ac_cv_fvisibility_hidden=no])
+ CFLAGS="$old_CFLAGS"
+ AS_IF([test "$ac_cv_fvisibility_hidden" = yes],
+ [CFLAGS="-DGC_VISIBILITY_HIDDEN_SET -fvisibility=hidden $CFLAGS"],
+ [CFLAGS="-DGC_NO_VISIBILITY $CFLAGS"])
+ AC_MSG_RESULT($ac_cv_fvisibility_hidden)
+ fi
+else
+
+ case "$host" in
+ *-*-cygwin* | *-*-mingw* | *-*-msys*)
+ # Do not require the clients to link with "user32" system library.
+ AC_DEFINE([DONT_USE_USER32_DLL], 1,
+ [Do not use user32.dll import library (Win32).])
+ # Use inline version of GC new and delete operators in test_cpp
+ # otherwise the system ones might be used instead because of arbitrary
+ # ordering of object files when linking.
+ CXXFLAGS="$CXXFLAGS -DGC_NOT_DLL"
+ ;;
+ esac
+fi
+
+# Configuration of machine-dependent code
+#
+AC_MSG_CHECKING(which machine-dependent code should be used)
+machdep=
+case "$host" in
+ alpha-*-openbsd*)
+ if test x"${ac_cv_lib_dl_dlopen}" != xyes ; then
+ AC_MSG_WARN(
+ "OpenBSD/Alpha without dlopen(). Shared library support is disabled.")
+ fi
+ ;;
+ i?86-*-solaris2.[[89]])
+ # PROC_VDB appears to work in 2.8 and 2.9 but not in 2.10+ (for now).
+ AC_DEFINE([SOLARIS25_PROC_VDB_BUG_FIXED], 1,
+ [See the comment in gcconfig.h.])
+ ;;
+ sparc-*-netbsd*)
+ machdep="sparc_netbsd_mach_dep.lo"
+ compile_asm=true
+ ;;
+ sparc*-*-linux* | sparc*-*-openbsd* | sparc64-*-freebsd* | sparc64-*-netbsd*)
+ machdep="sparc_mach_dep.lo"
+ compile_asm=true
+ ;;
+ sparc-sun-solaris2.3)
+ machdep="sparc_mach_dep.lo"
+ compile_asm=true
+ AC_DEFINE(SUNOS53_SHARED_LIB, 1,
+ [Define to work around a Solaris 5.3 bug (see dyn_load.c).])
+ ;;
+ sparc*-sun-solaris2*)
+ machdep="sparc_mach_dep.lo"
+ compile_asm=true
+ ;;
+ ia64-*-*)
+ machdep="ia64_save_regs_in_stack.lo"
+ ;;
+esac
+AC_MSG_RESULT($machdep)
+addobjs="$addobjs $machdep"
+AC_SUBST(addobjs)
+AC_SUBST(addlibs)
+
+LT_INIT
+
+# Suppress "extension used" clang warning (when compiling .S files).
+if test x$compile_asm = xtrue -a "$GCC" = yes; then
+ AC_MSG_CHECKING([whether compiler supports -Wno-language-extension-token])
+ old_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Werror -Wno-language-extension-token"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])],
+ [ac_cv_lang_ext_token=yes], [ac_cv_lang_ext_token=no])
+ CFLAGS="$old_CFLAGS"
+ AS_IF([test "$ac_cv_lang_ext_token" = yes],
+ [CFLAGS="$CFLAGS -Wno-language-extension-token"])
+ AC_MSG_RESULT($ac_cv_lang_ext_token)
+fi
+
+dnl We use these options to decide which functions to include.
+AC_ARG_WITH(target-subdir,
+[ --with-target-subdir=SUBDIR
+ configuring with a cross compiler])
+AC_ARG_WITH(cross-host,
+[ --with-cross-host=HOST configuring with a cross compiler])
+
+dnl automake wants to see AC_EXEEXT. But we don't need it. And having
+dnl it is actually a problem, because the compiler we're passed can't
+dnl necessarily do a full link. So we fool automake here.
+if false; then
+ dnl autoconf 2.50 runs AC_EXEEXT by default, and the macro expands
+ dnl to nothing, so nothing would remain between `then' and `fi' if it
+ dnl were not for the `:' below.
+ :
+ AC_EXEEXT
+fi
+
+dnl The collector might not properly work on IBM AIX when
+dnl built with gcc and -O. So we remove -O in the appropriate case.
+AC_MSG_CHECKING(whether AIX gcc optimization fix is necessary)
+case "$host" in
+ *aix*)
+ if test "$GCC" = yes; then
+ AC_MSG_RESULT(yes)
+ new_CFLAGS=
+ for i in $CFLAGS; do
+ case "$i" in
+ -O*)
+ ;;
+ *)
+ new_CFLAGS="$new_CFLAGS $i"
+ ;;
+ esac
+ done
+ CFLAGS="$new_CFLAGS"
+ else
+ AC_MSG_RESULT(no)
+ fi
+ ;;
+ *) AC_MSG_RESULT(no) ;;
+esac
+
+dnl Include defines that have become de facto standard.
+dnl ALL_INTERIOR_POINTERS and NO_EXECUTE_PERMISSION can be overridden
+dnl in the startup code.
+AC_DEFINE([NO_EXECUTE_PERMISSION], [1],
+ [Define to make the collector not allocate executable memory
+ by default.])
+AC_DEFINE([ALL_INTERIOR_POINTERS], [1],
+ [Define to recognise all pointers to the interior of objects.])
+
+
+dnl Interface Selection
+dnl -------------------
+dnl
+dnl By default, make the library as general as possible.
+AC_ARG_ENABLE(gcj-support,
+ [AS_HELP_STRING([--disable-gcj-support], [disable support for gcj])])
+if test x"$enable_gcj_support" != xno; then
+ AC_DEFINE(GC_GCJ_SUPPORT, 1, [Define to include support for gcj.])
+ case "$host" in
+ *-*-kfreebsd*-gnu)
+ # FIXME: For a reason, gctest hangs up on kFreeBSD if both of
+ # THREAD_LOCAL_ALLOC and GC_ENABLE_SUSPEND_THREAD are defined.
+ if test "${enable_thread_local_alloc}" = no; then
+ AC_DEFINE(GC_ENABLE_SUSPEND_THREAD)
+ fi
+ ;;
+ *)
+ AC_DEFINE([GC_ENABLE_SUSPEND_THREAD], 1,
+ [Define to turn on GC_suspend_thread support.])
+ ;;
+ esac
+fi
+AM_CONDITIONAL(ENABLE_GCJ_SUPPORT, [test x"enable_gcj_support" != xno])
+
+dnl Interaction with other programs that might use signals.
+AC_ARG_ENABLE(sigrt-signals,
+ [AS_HELP_STRING([--enable-sigrt-signals],
+ [force GC to use SIGRTMIN-based signals for thread suspend/resume])])
+if test x"${enable_sigrt_signals}" = xyes; then
+ AC_DEFINE([GC_USESIGRT_SIGNALS], 1,
+ [Force the GC to use signals based on SIGRTMIN+k.])
+fi
+
+
+dnl Debugging
+dnl ---------
+
+AH_TEMPLATE([GC_HAVE_BUILTIN_BACKTRACE],
+ [Define if backtrace information is supported.])
+AH_TEMPLATE([MAKE_BACK_GRAPH], [See doc/README.macros.])
+AH_TEMPLATE([SAVE_CALL_COUNT],
+ [The number of caller frames saved when allocating with the
+ debugging API.])
+UNWINDLIBS=
+AC_ARG_ENABLE(gc-debug,
+ [AS_HELP_STRING([--enable-gc-debug],
+ [include full support for pointer backtracing etc.])],
+[ if test "$enable_gc_debug" = "yes"; then
+ AC_MSG_WARN("Should define GC_DEBUG and use debug alloc in clients.")
+ AC_DEFINE([KEEP_BACK_PTRS], 1,
+ [Define to save back-pointers in debugging headers.])
+ keep_back_ptrs=true
+ AC_DEFINE([DBG_HDRS_ALL], 1,
+ [Define to force debug headers on all objects.])
+ AH_TEMPLATE([SHORT_DBG_HDRS],
+ [Shorten the headers to minimize object size at the expense
+ of checking for writes past the end (see doc/README.macros).])
+
+ case $host in
+ ia64-*-linux* )
+ AC_DEFINE(MAKE_BACK_GRAPH)
+ AC_DEFINE(SAVE_CALL_COUNT, 8)
+ AC_CHECK_LIB(unwind, backtrace, [
+ AC_DEFINE(GC_HAVE_BUILTIN_BACKTRACE)
+ UNWINDLIBS=-lunwind
+ AC_MSG_WARN("Client code may need to link against libunwind.")
+ ])
+ ;;
+ x86-*-linux* | i586-*-linux* | i686-*-linux* | x86_64-*-linux* )
+ AC_DEFINE(MAKE_BACK_GRAPH)
+ AC_MSG_WARN("Client must not use -fomit-frame-pointer.")
+ AC_DEFINE(SAVE_CALL_COUNT, 8)
+ ;;
+ i[3456]86-*-dgux*)
+ AC_DEFINE(MAKE_BACK_GRAPH)
+ ;;
+ esac
+ fi ])
+AM_CONDITIONAL([MAKE_BACK_GRAPH], [test x"$enable_gc_debug" = xyes])
+AM_CONDITIONAL([KEEP_BACK_PTRS], [test x"$keep_back_ptrs" = xtrue])
+
+# Check whether a compiler warning of unsafe __builtin_return_address(1)
+# could be suppressed by -Wno-frame-address option.
+# __builtin_return_address(1) is used by libgc for debugging purposes only.
+AC_MSG_CHECKING([whether -Wno-frame-address works])
+use_wno_error_frame_address=no
+old_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -Werror -Wno-frame-address $CFLAGS_EXTRA"
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[{
+ if (!__builtin_return_address(1)) return 1;
+}]])],[ use_wno_error_frame_address=yes ],[])
+CFLAGS="$old_CFLAGS"
+AC_MSG_RESULT($use_wno_error_frame_address)
+if test x"$use_wno_error_frame_address" = xyes; then
+ CFLAGS="$CFLAGS -Wno-frame-address"
+fi
+
+# Check for dladdr (used for debugging).
+AC_MSG_CHECKING(for dladdr)
+have_dladdr=no
+old_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS $CFLAGS_EXTRA"
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#define _GNU_SOURCE 1
+#include <dlfcn.h>]], [[{
+ Dl_info info;
+ (void)dladdr("", &info);
+}]])],[ have_dladdr=yes ],[])
+CFLAGS="$old_CFLAGS"
+AC_MSG_RESULT($have_dladdr)
+if test x"$have_dladdr" = xyes; then
+ AC_DEFINE([HAVE_DLADDR], 1, [Define to use 'dladdr' function.])
+fi
+
+# sigsetjmp could be a macro (thus AC_CHECK_FUNCS cannot be used).
+AC_MSG_CHECKING(for sigsetjmp)
+old_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS $CFLAGS_EXTRA"
+AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <setjmp.h>]], [[sigjmp_buf t; sigsetjmp(t, 0)]])],[AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)
+ AC_DEFINE([GC_NO_SIGSETJMP], [1], [Missing sigsetjmp function.])])
+CFLAGS="$old_CFLAGS"
+
+# pthread_setname_np, if available, may have 1, 2 or 3 arguments.
+AS_IF([test "$THREADS" = posix],
+ [AC_MSG_CHECKING(for pthread_setname_np)
+ old_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $CFLAGS_EXTRA -Werror"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+# define _GNU_SOURCE 1
+# include <pthread.h>
+ ], [pthread_setname_np("thread-name")])],
+ [AC_MSG_RESULT([yes (w/o tid)])
+ AC_DEFINE([HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID], [1],
+ [Define to use 'pthread_setname_np(const char*)' function.])], [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+# define _GNU_SOURCE 1
+# include <pthread.h>
+ ], [pthread_setname_np(pthread_self(), "thread-name-%u", 0)])],
+ [AC_MSG_RESULT([yes (with tid and arg)])
+ AC_DEFINE([HAVE_PTHREAD_SETNAME_NP_WITH_TID_AND_ARG], [1],
+ [Define to use 'pthread_setname_np(pthread_t, const char*, void *)'
+ function.])],
+ [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+# define _GNU_SOURCE 1
+# include <pthread.h>
+ ], [pthread_setname_np(pthread_self(), "thread-name")])],
+ [AC_MSG_RESULT([yes (with tid)])
+ AC_DEFINE([HAVE_PTHREAD_SETNAME_NP_WITH_TID], [1],
+ [Define to use 'pthread_setname_np(pthread_t, const char*)'
+ function.])],
+ [AC_MSG_RESULT(no)])])])
+ CFLAGS="$old_CFLAGS"])
+
+# Check for AViiON Machines running DGUX
+ac_is_dgux=no
+AC_CHECK_HEADER(sys/dg_sys_info.h,
+[ac_is_dgux=yes;])
+
+dnl :GOTCHA: we do not check anything but sys/dg_sys_info.h
+if test $ac_is_dgux = yes; then
+ dgux_spec_opts="-DDGUX -D_DGUX_SOURCE -Di386 -mno-legend -O2"
+ CFLAGS="$dgux_spec_opts $CFLAGS"
+ CXXFLAGS="$dgux_spec_opts $CXXFLAGS"
+ if test "$enable_gc_debug" = "yes"; then
+ CFLAGS="-g -mstandard $CFLAGS"
+ CXXFLAGS="-g -mstandard $CXXFLAGS"
+ fi
+ AC_SUBST(CFLAGS)
+ AC_SUBST(CXXFLAGS)
+fi
+
+AC_ARG_ENABLE(java-finalization,
+ [AS_HELP_STRING([--disable-java-finalization],
+ [disable support for java finalization])])
+if test x"$enable_java_finalization" != xno; then
+ AC_DEFINE([JAVA_FINALIZATION], 1, [See doc/README.macros.])
+fi
+
+AC_ARG_ENABLE(atomic-uncollectable,
+ [AS_HELP_STRING([--disable-atomic-uncollectible],
+ [disable support for atomic uncollectible allocation])])
+if test x"$enable_atomic_uncollectible" != x"no"; then
+ AC_DEFINE([GC_ATOMIC_UNCOLLECTABLE], 1,
+ [Define to enable atomic uncollectible allocation.])
+fi
+
+AC_ARG_ENABLE(redirect-malloc,
+ [AS_HELP_STRING([--enable-redirect-malloc],
+ [redirect malloc and friends to GC routines])])
+
+if test "${enable_redirect_malloc}" = yes; then
+ if test "${enable_gc_debug}" = yes; then
+ AC_DEFINE([REDIRECT_MALLOC], GC_debug_malloc_replacement,
+ [If defined, redirect malloc to this function.])
+ AC_DEFINE([REDIRECT_REALLOC], GC_debug_realloc_replacement,
+ [If defined, redirect GC_realloc to this function.])
+ AC_DEFINE([REDIRECT_FREE], GC_debug_free,
+ [If defined, redirect free to this function.])
+ else
+ AC_DEFINE(REDIRECT_MALLOC, GC_malloc)
+ fi
+ AC_DEFINE([GC_USE_DLOPEN_WRAP], 1, [See doc/README.macros.])
+fi
+
+AC_ARG_ENABLE(disclaim,
+ [AS_HELP_STRING([--disable-disclaim],
+ [disable alternative (more efficient) finalization interface])])
+if test x"$enable_disclaim" != xno; then
+ AC_DEFINE(ENABLE_DISCLAIM, 1,
+ [Define to enable alternative finalization interface.])
+fi
+AM_CONDITIONAL(ENABLE_DISCLAIM,
+ [test x"$enable_disclaim" != xno])
+
+AC_ARG_ENABLE(large-config,
+ [AS_HELP_STRING([--enable-large-config],
+ [optimize for large (> 100 MB) heap or root set])])
+if test "${enable_large_config}" = yes; then
+ AC_DEFINE(LARGE_CONFIG, 1,
+ [Define to optimize for large heaps or root sets.])
+fi
+
+dnl This is something of a hack. When cross-compiling we turn off
+dnl some functionality. We also enable the "small" configuration.
+dnl These is only correct when targeting an embedded system. FIXME.
+if test -n "${with_cross_host}"; then
+ AC_DEFINE([NO_CLOCK], 1, [Define to not use system clock (cross compiling).])
+ AC_DEFINE([SMALL_CONFIG], 1,
+ [Define to tune the collector for small heap sizes.])
+fi
+
+if test "$enable_gc_debug" = "no"; then
+ AC_DEFINE([NO_DEBUGGING], 1,
+ [Disable debugging, like GC_dump and its callees.])
+fi
+
+AC_SUBST(UNWINDLIBS)
+
+AC_ARG_ENABLE(gc-assertions,
+ [AS_HELP_STRING([--enable-gc-assertions],
+ [collector-internal assertion checking])])
+if test "${enable_gc_assertions}" = yes; then
+ AC_DEFINE([GC_ASSERTIONS], 1,
+ [Define to enable internal debug assertions.])
+fi
+
+AC_ARG_ENABLE(mmap,
+ [AS_HELP_STRING([--enable-mmap],
+ [use mmap instead of sbrk to expand the heap])],
+ gc_use_mmap=$enableval)
+
+AC_ARG_ENABLE(munmap,
+ [AS_HELP_STRING([--enable-munmap=N],
+ [return page to the OS if empty for N collections
+ (default: 6)])],
+ MUNMAP_THRESHOLD=$enableval)
+if test x$enable_munmap != xno; then
+ AC_DEFINE([USE_MMAP], 1,
+ [Define to use mmap instead of sbrk to expand the heap.])
+ AH_TEMPLATE([USE_WINALLOC],
+ [Define to use Win32 VirtualAlloc (instead of sbrk or
+ mmap) to expand the heap.])
+ AC_DEFINE([USE_MUNMAP], 1,
+ [Define to return memory to OS with munmap calls
+ (see doc/README.macros).])
+ if test x$MUNMAP_THRESHOLD = x -o x$MUNMAP_THRESHOLD = xyes; then
+ MUNMAP_THRESHOLD=6
+ fi
+ AC_DEFINE_UNQUOTED([MUNMAP_THRESHOLD], [${MUNMAP_THRESHOLD}],
+ [Number of GC cycles to wait before unmapping an unused block.])
+else
+ if test "${gc_use_mmap}" = "yes"; then
+ AC_DEFINE([USE_MMAP], 1,
+ [Define to use mmap instead of sbrk to expand the heap.])
+ fi
+fi
+
+AC_ARG_ENABLE(dynamic-loading,
+ [AS_HELP_STRING([--disable-dynamic-loading],
+ [build the collector with disabled tracing
+ of dynamic library data roots])])
+if test "${enable_dynamic_loading}" = "no"; then
+ AC_DEFINE([IGNORE_DYNAMIC_LOADING], 1,
+ [Do not define DYNAMIC_LOADING even if supported (i.e., build the
+ collector with disabled tracing of dynamic library data roots).])
+fi
+
+AC_ARG_ENABLE(register-main-static-data,
+ [AS_HELP_STRING([--disable-register-main-static-data],
+ [skip the initial guess of data root sets])])
+if test "${enable_register_main_static_data}" = "no"; then
+ AC_DEFINE([GC_DONT_REGISTER_MAIN_STATIC_DATA], 1,
+ [Skip the initial guess of data root sets.])
+fi
+
+AC_ARG_ENABLE(checksums,
+ [AS_HELP_STRING([--enable-checksums],
+ [report on erroneously cleared dirty bits at
+ substantial performance cost; use only for
+ debugging of the incremental collector])])
+if test x$enable_checksums = xyes; then
+ if test x$enable_munmap != xno -o x$THREADS != xnone; then
+ AC_MSG_ERROR([CHECKSUMS not compatible with USE_MUNMAP or threads])
+ fi
+ AC_DEFINE([CHECKSUMS], 1,
+ [Erroneously cleared dirty bits checking. Use only for
+ debugging of the incremental collector.])
+fi
+AM_CONDITIONAL([CHECKSUMS], test x$enable_checksums = xyes)
+
+AM_CONDITIONAL(USE_LIBDIR, test -z "$with_cross_host")
+
+AC_ARG_ENABLE(werror,
+ [AS_HELP_STRING([--enable-werror], [pass -Werror to the C compiler])],
+ werror_flag=$enableval, werror_flag=no)
+if test x$werror_flag = xyes; then
+ WERROR_CFLAGS="-Werror"
+ case "$host" in
+ # _dyld_bind_fully_image_containing_address is deprecated in OS X 10.5+
+ *-*-darwin*)
+ WERROR_CFLAGS="$WERROR_CFLAGS -Wno-deprecated-declarations"
+ ;;
+ esac
+fi
+AC_SUBST([WERROR_CFLAGS])
+
+AC_ARG_ENABLE(single-obj-compilation,
+ [AS_HELP_STRING([--enable-single-obj-compilation],
+ [compile all libgc source files into single .o
+ (default: yes if static libraries are disabled)])],
+ [], [ AS_IF([test x"$enable_static" = xno],
+ [enable_single_obj_compilation=yes]) ])
+AM_CONDITIONAL([SINGLE_GC_OBJ],
+ [test x"$enable_single_obj_compilation" = xyes])
+
+AC_ARG_ENABLE(gcov,
+ [AS_HELP_STRING([--enable-gcov], [turn on code coverage analysis])])
+if test "$enable_gcov" = "yes"; then
+ CFLAGS="-D NTHREADS=20 $CFLAGS --coverage"
+ if test "${enable_shared}" = no; then
+ # FIXME: As of g++-4.8.4/x64, in case of shared library build, test_cpp
+ # linkage fails with "hidden symbol atexit is referenced by DSO" message.
+ CXXFLAGS="$CXXFLAGS --coverage"
+ fi
+ # Turn off optimization to get accurate line numbers.
+ CFLAGS=`echo "$CFLAGS" | sed -e 's/-O\(1\|2\|3\|4\|s\|fast\)\?//g'`
+ CXXFLAGS=`echo "$CXXFLAGS" | sed -e 's/-O\(1\|2\|3\|4\|s\|fast\)\?//g'`
+fi
+
+AC_ARG_ENABLE(docs,
+ [AS_HELP_STRING([--disable-docs],
+ [do not build and install documentation])])
+AM_CONDITIONAL(ENABLE_DOCS, test x$enable_docs != xno)
+
+AM_CONDITIONAL(ENABLE_SHARED, test x$enable_shared = xyes)
+
+# Atomic Ops
+# ----------
+
+# Do we want to use an external libatomic_ops? By default use it if it's
+# found.
+AC_ARG_WITH([libatomic-ops],
+ [AS_HELP_STRING([--with-libatomic-ops[=yes|no|check|none]],
+ [use an external libatomic_ops? (default: check;
+ none: use compiler intrinsics or no thread support)])],
+ [], [ AS_IF([test x"$THREADS" != xnone],
+ [with_libatomic_ops=check], [with_libatomic_ops=none]) ])
+
+# Check whether compiler atomic intrinsics can be used.
+if test x"$with_libatomic_ops" = xcheck; then
+ AC_MSG_CHECKING(for compiler intrinsics support)
+ old_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $CFLAGS_EXTRA -DGC_BUILTIN_ATOMIC"
+ CFLAGS="$CFLAGS -I${srcdir}/include -I${srcdir}/tests"
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[#include "test_atomic_ops.c"]])],[AC_MSG_RESULT(yes)
+ with_libatomic_ops=none],[AC_MSG_RESULT(no)],[AC_MSG_RESULT(skipped because cross-compiling)])
+ CFLAGS="$old_CFLAGS"
+fi
+
+# Check for an external libatomic_ops if the above answer is "yes" or "check".
+# If not found, fail on "yes", and convert "check" to "no".
+# First, check that libatomic_ops usage is not disabled explicitly.
+missing_libatomic_ops=false
+AS_IF([test x"$with_libatomic_ops" != xno -a x"$with_libatomic_ops" != xnone],
+ [ missing_libatomic_ops=true ])
+
+dnl To avoid "syntax error near unexpected token ATOMIC_OPS" configure error
+dnl observed by some clients, the following 3 code lines are commented out:
+dnl
+dnl AS_IF([test x$missing_libatomic_ops = xtrue],
+dnl [ PKG_CHECK_MODULES([ATOMIC_OPS], [atomic_ops],
+dnl [ missing_libatomic_ops=false ], [ [] ]) ])
+
+dnl Retry with AC_CHECK_HEADER if PKG_CHECK_MODULES failed.
+AS_IF([test x$missing_libatomic_ops = xtrue],
+ [ AC_CHECK_HEADER([atomic_ops.h], [missing_libatomic_ops=false]) ])
+AS_IF([test x$missing_libatomic_ops = xtrue],
+ [ AS_IF([test x"$with_libatomic_ops" != xcheck],
+ [ AC_MSG_ERROR([An external libatomic_ops was not found]) ])
+ with_libatomic_ops=no ])
+
+# If we have neither an external or an internal version, offer a useful hint
+# and exit.
+AS_IF([test x"$with_libatomic_ops" = xno \
+ -a ! -e "$srcdir/libatomic_ops/src/atomic_ops.h"],
+ [ AC_MSG_ERROR([libatomic_ops is required. You can either install it on
+ your system, or fetch and unpack a recent version into the
+ source directory and link or rename it to libatomic_ops.]) ])
+
+# Finally, emit the definitions for bundled or external AO.
+AC_MSG_CHECKING([which libatomic_ops to use])
+AS_IF([test x"$with_libatomic_ops" != xno],
+ [ AS_IF([test x"$with_libatomic_ops" != xnone -a x"$THREADS" != xnone],
+ [ AC_MSG_RESULT([external])
+ ATOMIC_OPS_LIBS="-latomic_ops"
+ AC_SUBST([ATOMIC_OPS_LIBS]) ],
+ [ AC_MSG_RESULT([none])
+ AS_IF([test x"$THREADS" != xnone],
+ [ AC_DEFINE([GC_BUILTIN_ATOMIC], [1],
+ [Use GCC atomic intrinsics instead of
+ libatomic_ops primitives.]) ]) ])
+ AO_TRYLINK_CFLAGS="" ],
+ [ AC_MSG_RESULT([internal])
+ AO_TRYLINK_CFLAGS="-I${srcdir}/libatomic_ops/src"
+ ATOMIC_OPS_CFLAGS='-I$(top_builddir)/libatomic_ops/src -I$(top_srcdir)/libatomic_ops/src'
+ ATOMIC_OPS_LIBS=""
+ AC_SUBST([ATOMIC_OPS_CFLAGS])
+ AC_CONFIG_SUBDIRS([libatomic_ops])
+ ])
+AM_CONDITIONAL([USE_INTERNAL_LIBATOMIC_OPS],
+ [test x$with_libatomic_ops = xno -a x"$THREADS" != xnone])
+AM_CONDITIONAL([NEED_ATOMIC_OPS_ASM],
+ [test x$with_libatomic_ops = xno -a x$need_atomic_ops_asm = xtrue])
+
+# Check whether particular AO primitives are emulated with locks.
+# The check below is based on the fact that linking with the libatomic_ops
+# binary file is not needed in case of absence of the emulation (except for
+# Solaris SPARC).
+AS_IF([test x$with_libatomic_ops != xnone -a x$need_atomic_ops_asm != xtrue],
+ [ old_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $AO_TRYLINK_CFLAGS $CFLAGS_EXTRA"
+ AC_MSG_CHECKING([for lock-free AO_or primitive])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include "atomic_ops.h"]], [[AO_t x=0;AO_or(&x,1)]])],[ AC_MSG_RESULT(yes)
+ AC_DEFINE([HAVE_LOCKFREE_AO_OR], [1],
+ [libatomic_ops AO_or primitive implementation is lock-free.]) ],[ AC_MSG_RESULT(no) ])
+ AC_MSG_CHECKING([for lock-free AO load/store, test-and-set primitives])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include "atomic_ops.h"]], [[AO_t x=0;unsigned char c=0;AO_TS_t z=AO_TS_INITIALIZER;
+ (void)AO_test_and_set_acquire(&z);AO_CLEAR(&z);AO_compiler_barrier();
+ AO_store(&x,AO_load(&x)+1);AO_char_store(&c,AO_char_load(&c)+1);
+ AO_store_release(&x,AO_load_acquire(&x)+1)]])],[ AC_MSG_RESULT(yes) ],[ AC_MSG_RESULT(no)
+ use_thread_local_alloc=no
+ AC_DEFINE([BASE_ATOMIC_OPS_EMULATED], [1],
+ [AO load, store and/or test-and-set primitives are
+ implemented in libatomic_ops using locks.]) ])
+ AS_IF([test x$use_parallel_mark != xno],
+ [ AC_MSG_CHECKING(
+ [for lock-free compare-and-swap and fetch-and-add primitives])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[#define AO_REQUIRE_CAS
+ #include "atomic_ops.h"]], [[AO_t x=0;(void)AO_fetch_and_add(&x,1);(void)AO_compare_and_swap(&x,1,2)]])],[ AC_MSG_RESULT(yes) ],[ AC_MSG_RESULT(no)
+ use_parallel_mark=no ]) ])
+ CFLAGS="$old_CFLAGS" ])
+
+AS_IF([test x$use_parallel_mark != xno],
+ [ AC_DEFINE(PARALLEL_MARK) ])
+AS_IF([test x$use_thread_local_alloc != xno],
+ [ AC_DEFINE(THREAD_LOCAL_ALLOC) ])
+AM_CONDITIONAL(THREAD_LOCAL_ALLOC, test x$use_thread_local_alloc != xno)
+
+AC_ARG_ENABLE(handle-fork,
+ [AS_HELP_STRING([--enable-handle-fork[=yes|no|auto|manual]],
+ [attempt to ensure a usable collector after fork()
+ in multi-threaded programs (default: auto;
+ manual: GC_atfork_prepare/parent/child should be
+ called by the client)])])
+if test "${enable_handle_fork}" = yes; then
+ AC_DEFINE(HANDLE_FORK, 1,
+ [Define to install pthread_atfork() handlers by default.])
+elif test "${enable_handle_fork}" = no; then
+ AC_DEFINE(NO_HANDLE_FORK, 1,
+ [Prohibit installation of pthread_atfork() handlers.])
+elif test "${enable_handle_fork}" != manual -a x$THREADS = xposix; then
+ # If the option is omitted, pthread_atfork handlers are installed
+ # by default for the targets where pthread_atfork is known to work.
+ case "$host" in
+ *-*-aix* | *-*-android* | *-*-cygwin* | *-*-darwin* | *-*-freebsd* | \
+ *-*-haiku* | *-*-hpux11* | *-*-irix* | *-*-kfreebsd*-gnu | \
+ *-*-*linux* | *-*-netbsd* | *-*-openbsd* | *-*-osf* | *-*-solaris*)
+ AC_DEFINE(HANDLE_FORK)
+ ;;
+ esac
+fi
+
+dnl Produce the Files
+dnl -----------------
+
+AC_CONFIG_FILES([Makefile bdw-gc.pc])
+
+AC_CONFIG_COMMANDS([default],,
+ [ srcdir="${srcdir}"
+ host=${host}
+ CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
+ CC="${CC}"
+ DEFS="$DEFS" ])
+
+AC_OUTPUT