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+ Garbage Collector (parallel iversion) for ix86 DG/UX Release R4.20MU07
+
+
+ *READ* the file README.QUICK.
+
+ You need the GCC-3.0.3 rev (DG/UX) compiler to build this tree.
+ This compiler has the new "dgux386" threads package implemented.
+ It also supports the switch "-pthread" needed to link correctly
+ the DG/UX's -lrte -lthread with -lgcc and the system's -lc.
+ Finally we support parralleli-mark for the SMP DG/UX machines.
+ To build the garbage collector do:
+
+ ./configure --enable-parallel-mark
+ make
+ make gctest
+
+ Before you run "gctest" you need to set your LD_LIBRARY_PATH
+ correctly so that "gctest" can find the shared library libgc.
+ Alternatively you can do a configuration
+
+ ./configure --enable-parallel-mark --disable-shared
+
+ to build only the static version of libgc.
+
+ To enable debugging messages please do:
+ 1) Add the "--enable-full-debug" flag during configuration.
+ 2) Edit the file linux-threads.c and uncommnect the line:
+
+ /* #define DEBUG_THREADS 1 */ to --->
+
+ #define DEBUG_THREADS 1
+
+ Then give "make" as usual.
+
+ In a machine with 4 CPUs (my own machine) the option parallel
+ mark (aka --enable-parallel-mark) makes a BIG difference.
+
+ Takis Psarogiannakopoulos
+ University of Cambridge
+ Centre for Mathematical Sciences
+ Department of Pure Mathematics
+ Wilberforce Road
+ Cambridge CB3 0WB ,UK , <takis@XFree86.Org>
+ January 2002
+
+
+Note (HB):
+ The integration of this patch is currently not complete.
+ The following patches against 6.1alpha3 where hard to move
+ to alpha4, and are not integrated. There may also be minor
+ problems with stylistic corrections made by me.
+
+
+--- ltconfig.ORIG Mon Jan 28 20:22:18 2002
++++ ltconfig Mon Jan 28 20:44:00 2002
+@@ -689,6 +689,11 @@
+ pic_flag=-Kconform_pic
+ fi
+ ;;
++ dgux*)
++ pic_flag='-fPIC'
++ link_static='-Bstatic'
++ wl='-Wl,'
++ ;;
+ *)
+ pic_flag='-fPIC'
+ ;;
+@@ -718,6 +723,12 @@
+ # We can build DLLs from non-PIC.
+ ;;
+
++ dgux*)
++ pic_flag='-KPIC'
++ link_static='-Bstatic'
++ wl='-Wl,'
++ ;;
++
+ osf3* | osf4* | osf5*)
+ # All OSF/1 code is PIC.
+ wl='-Wl,'
+@@ -1154,6 +1165,22 @@
+ fi
+ ;;
+
++ dgux*)
++ ld_shlibs=yes
++ # For both C/C++ ommit the deplibs. This is because we relying on the fact
++ # that compilation of execitables will put them in correct order
++ # in any case and sometimes are wrong when listed as deplibs (or missing some deplibs)
++ # However when GNU ld and --whole-archive needs to be used we have the problem
++ # that if the -fPIC *_s.a archive is linked through deplibs list we ommiting crucial
++ # .lo/.o files from the created shared lib. This I think is not the case here.
++ archive_cmds='$CC -shared -h $soname -o $lib $libobjs $linkopts'
++ thread_safe_flag_spec='-pthread'
++ wlarc=
++ hardcode_libdir_flag_spec='-L$libdir'
++ hardcode_shlibpath_var=no
++ ac_cv_archive_cmds_needs_lc=no
++ ;;
++
+ cygwin* | mingw*)
+ # hardcode_libdir_flag_spec is actually meaningless, as there is
+ # no search path for DLLs.
+@@ -1497,7 +1524,7 @@
+ ;;
+
+ dgux*)
+- archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linkopts'
++ archive_cmds='$CC -shared -h $soname -o $lib $libobjs $linkopts'
+ hardcode_libdir_flag_spec='-L$libdir'
+ hardcode_shlibpath_var=no
+ ;;
+@@ -2092,12 +2119,17 @@
+ ;;
+
+ dgux*)
+- version_type=linux
++ version_type=dgux
+ need_lib_prefix=no
+ need_version=no
+- library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
+- soname_spec='${libname}${release}.so$major'
++ library_names_spec='$libname.so$versuffix'
++ soname_spec='$libname.so$versuffix'
+ shlibpath_var=LD_LIBRARY_PATH
++ thread_safe_flag_spec='-pthread'
++ wlarc=
++ hardcode_libdir_flag_spec='-L$libdir'
++ hardcode_shlibpath_var=no
++ ac_cv_archive_cmds_needs_lc=no
+ ;;
+
+ sysv4*MP*)
+
+
+--- ltmain.sh.ORIG Mon Jan 28 20:31:18 2002
++++ ltmain.sh Tue Jan 29 00:11:29 2002
+@@ -1072,11 +1072,38 @@
+ esac
+ ;;
+
++ -thread*)
++ # DG/UX GCC 2.95.x, 3.x.x rev (DG/UX) links -lthread
++ # with the switch -threads
++ if test "$arg" = "-threads"; then
++ case "$host" in
++ i[3456]86-*-dgux*)
++ deplibs="$deplibs $arg"
++ continue
++ ;;
++ esac
++ fi
++ ;;
++
++ -pthread*)
++ # DG/UX GCC 2.95.x, 3.x.x rev (DG/UX) links -lthread
++ # with the switch -pthread
++ if test "$arg" = "-pthread"; then
++ case "$host" in
++ i[3456]86-*-dgux*)
++ deplibs="$deplibs $arg"
++ continue
++ ;;
++ esac
++ fi
++ ;;
++
+ -l*)
+ if test "$arg" = "-lc"; then
+ case "$host" in
+- *-*-cygwin* | *-*-mingw* | *-*-os2* | *-*-beos*)
++ *-*-cygwin* | *-*-mingw* | *-*-os2* | *-*-beos* | i[3456]86-*-dgux*)
+ # These systems don't actually have c library (as such)
++ # It is wrong in DG/UX to add -lc when creating shared/dynamic objs/libs
+ continue
+ ;;
+ esac
+@@ -1248,6 +1275,12 @@
+ temp_deplibs=
+ for deplib in $dependency_libs; do
+ case "$deplib" in
++ -thread*)
++ temp_deplibs="$temp_deplibs $deplib"
++ ;;
++ -pthread)
++ temp_deplibs="$temp_deplibs $deplib"
++ ;;
+ -R*) temp_xrpath=`$echo "X$deplib" | $Xsed -e 's/^-R//'`
+ case " $rpath $xrpath " in
+ *" $temp_xrpath "*) ;;
+@@ -1709,6 +1742,13 @@
+ done
+ ;;
+
++ dgux)
++ # Leave mostly blank for DG/UX
++ major=
++ versuffix=".$current.$revision";
++ verstring=
++ ;;
++
+ linux)
+ major=.`expr $current - $age`
+ versuffix="$major.$age.$revision"
+@@ -1792,8 +1832,9 @@
+
+ dependency_libs="$deplibs"
+ case "$host" in
+- *-*-cygwin* | *-*-mingw* | *-*-os2* | *-*-beos*)
++ *-*-cygwin* | *-*-mingw* | *-*-os2* | *-*-beos* | i[3456]86-*-dgux*)
+ # these systems don't actually have a c library (as such)!
++ # It is wrong in DG/UX to add -lc when creating shared/dynamic objs/libs
+ ;;
+ *)
+ # Add libc to deplibs on all other systems.