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/vendor/gc/doc/README.DGUX386

http://github.com/feyeleanor/RubyGoLightly
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  1    Garbage Collector (parallel iversion) for ix86 DG/UX Release R4.20MU07
  2
  3
  4     *READ* the file README.QUICK.
  5
  6     You need the GCC-3.0.3 rev (DG/UX) compiler to build this tree.
  7     This compiler has the new "dgux386" threads package implemented.
  8     It also supports the switch "-pthread" needed to link correctly
  9     the DG/UX's -lrte -lthread with -lgcc and the system's -lc. 
 10     Finally we support parralleli-mark for the SMP DG/UX machines.
 11     To build the garbage collector do:
 12      
 13      ./configure --enable-parallel-mark
 14      make
 15      make gctest
 16
 17     Before you run "gctest" you need to set your LD_LIBRARY_PATH
 18     correctly so that "gctest" can find the shared library libgc.
 19     Alternatively you can do a configuration
 20
 21      ./configure --enable-parallel-mark --disable-shared
 22  
 23     to build only the static version of libgc.
 24  
 25     To enable debugging messages please do:
 26     1) Add the "--enable-full-debug" flag during configuration. 
 27     2) Edit the file linux-threads.c and uncommnect the line:
 28
 29     /* #define DEBUG_THREADS 1 */ to ---> 
 30
 31     #define DEBUG_THREADS 1
 32
 33     Then give "make" as usual.
 34    
 35     In a machine with 4 CPUs (my own machine) the option parallel
 36     mark (aka --enable-parallel-mark) makes a BIG difference.
 37
 38     Takis Psarogiannakopoulos
 39     University of Cambridge
 40     Centre for Mathematical Sciences
 41     Department of Pure Mathematics
 42     Wilberforce Road
 43     Cambridge CB3 0WB ,UK , <takis@XFree86.Org>
 44     January 2002
 45
 46
 47Note (HB):
 48     The integration of this patch is currently not complete.
 49     The following patches against 6.1alpha3 where hard to move
 50     to alpha4, and are not integrated.  There may also be minor
 51     problems with stylistic corrections made by me.
 52
 53
 54--- ltconfig.ORIG	Mon Jan 28 20:22:18 2002
 55+++ ltconfig	Mon Jan 28 20:44:00 2002
 56@@ -689,6 +689,11 @@
 57        pic_flag=-Kconform_pic
 58     fi
 59     ;;
 60+  dgux*)
 61+    pic_flag='-fPIC'
 62+    link_static='-Bstatic'
 63+    wl='-Wl,'
 64+    ;;
 65   *)
 66     pic_flag='-fPIC'
 67     ;;
 68@@ -718,6 +723,12 @@
 69     # We can build DLLs from non-PIC.
 70     ;;
 71 
 72+  dgux*)
 73+    pic_flag='-KPIC'
 74+    link_static='-Bstatic'
 75+    wl='-Wl,'
 76+    ;;
 77+
 78   osf3* | osf4* | osf5*)
 79     # All OSF/1 code is PIC.
 80     wl='-Wl,'
 81@@ -1154,6 +1165,22 @@
 82     fi
 83     ;;
 84 
 85+  dgux*)
 86+    ld_shlibs=yes
 87+    # For both C/C++ ommit the deplibs. This is because we relying on the fact
 88+    # that compilation of execitables will put them in correct order
 89+    # in any case and sometimes are wrong when listed as deplibs (or missing some deplibs)
 90+    # However when GNU ld and --whole-archive needs to be used we have the problem
 91+    # that if the -fPIC *_s.a archive is linked through deplibs list we ommiting crucial
 92+    # .lo/.o files from the created shared lib. This I think is not the case here.
 93+    archive_cmds='$CC -shared -h $soname -o $lib $libobjs $linkopts'
 94+    thread_safe_flag_spec='-pthread'
 95+    wlarc=
 96+    hardcode_libdir_flag_spec='-L$libdir'
 97+    hardcode_shlibpath_var=no
 98+    ac_cv_archive_cmds_needs_lc=no
 99+    ;;
100+
101   cygwin* | mingw*)
102     # hardcode_libdir_flag_spec is actually meaningless, as there is
103     # no search path for DLLs.
104@@ -1497,7 +1524,7 @@
105     ;;
106 
107   dgux*)
108-    archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linkopts'
109+    archive_cmds='$CC -shared -h $soname -o $lib $libobjs $linkopts'
110     hardcode_libdir_flag_spec='-L$libdir'
111     hardcode_shlibpath_var=no
112     ;;
113@@ -2092,12 +2119,17 @@
114   ;;
115 
116 dgux*)
117-  version_type=linux
118+  version_type=dgux
119   need_lib_prefix=no
120   need_version=no
121-  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so$major $libname.so'
122-  soname_spec='${libname}${release}.so$major'
123+  library_names_spec='$libname.so$versuffix'
124+  soname_spec='$libname.so$versuffix'
125   shlibpath_var=LD_LIBRARY_PATH
126+  thread_safe_flag_spec='-pthread'
127+  wlarc=
128+  hardcode_libdir_flag_spec='-L$libdir'
129+  hardcode_shlibpath_var=no
130+  ac_cv_archive_cmds_needs_lc=no
131   ;;
132 
133 sysv4*MP*)
134
135
136--- ltmain.sh.ORIG	Mon Jan 28 20:31:18 2002
137+++ ltmain.sh	Tue Jan 29 00:11:29 2002
138@@ -1072,11 +1072,38 @@
139 	esac
140 	;;
141 
142+      -thread*)
143+	# DG/UX GCC 2.95.x, 3.x.x rev (DG/UX) links -lthread
144+	# with the switch -threads
145+	if test "$arg" = "-threads"; then
146+	  case "$host" in
147+	  i[3456]86-*-dgux*)
148+	    deplibs="$deplibs $arg"
149+	    continue
150+	    ;;
151+	  esac
152+	fi
153+	;;
154+
155+      -pthread*)
156+	# DG/UX GCC 2.95.x, 3.x.x rev (DG/UX) links -lthread
157+	# with the switch -pthread
158+	if test "$arg" = "-pthread"; then
159+	  case "$host" in
160+	  i[3456]86-*-dgux*)
161+	    deplibs="$deplibs $arg"
162+	    continue
163+	    ;;
164+	  esac
165+	fi
166+	;;
167+
168       -l*)
169 	if test "$arg" = "-lc"; then
170 	  case "$host" in
171-	  *-*-cygwin* | *-*-mingw* | *-*-os2* | *-*-beos*)
172+	  *-*-cygwin* | *-*-mingw* | *-*-os2* | *-*-beos* | i[3456]86-*-dgux*)
173 	    # These systems don't actually have c library (as such)
174+	    # It is wrong in DG/UX to add -lc when creating shared/dynamic objs/libs
175 	    continue
176 	    ;;
177 	  esac
178@@ -1248,6 +1275,12 @@
179 	  temp_deplibs=
180 	  for deplib in $dependency_libs; do
181 	    case "$deplib" in
182+	    -thread*)
183+		 temp_deplibs="$temp_deplibs $deplib"
184+		 ;;
185+	    -pthread)
186+		 temp_deplibs="$temp_deplibs $deplib"
187+		 ;;
188 	    -R*) temp_xrpath=`$echo "X$deplib" | $Xsed -e 's/^-R//'`
189 		 case " $rpath $xrpath " in
190 		 *" $temp_xrpath "*) ;;
191@@ -1709,6 +1742,13 @@
192 	  done
193 	  ;;
194 
195+	dgux)
196+	  # Leave mostly blank for DG/UX
197+	  major=
198+	  versuffix=".$current.$revision";
199+	  verstring=
200+	  ;;
201+
202 	linux)
203 	  major=.`expr $current - $age`
204 	  versuffix="$major.$age.$revision"
205@@ -1792,8 +1832,9 @@
206 
207 	dependency_libs="$deplibs"
208 	case "$host" in
209-	*-*-cygwin* | *-*-mingw* | *-*-os2* | *-*-beos*)
210+	*-*-cygwin* | *-*-mingw* | *-*-os2* | *-*-beos* | i[3456]86-*-dgux*)
211 	  # these systems don't actually have a c library (as such)!
212+	  # It is wrong in DG/UX to add -lc when creating shared/dynamic objs/libs
213 	  ;;
214 	*)
215 	  # Add libc to deplibs on all other systems.