sync with w3m-0.2.2-inu-1.1/gc

gc/configure.in

@@ -96,7 +96,7 @@ case "$THREADS" in
 	;;
      *-*-freebsd*)
 	AC_MSG_WARN("FreeBSD does not yet fully support threads with Boehm GC.")
-	AC_DEFINE(FREEBSD_THREADS)
+	AC_DEFINE(GC_FREEBSD_THREADS)
 	INCLUDES="$INCLUDES -pthread"
 	THREADLIBS=-pthread
       	;;
@@ -157,6 +157,15 @@ case "$host" in
 # alpha*-*-*)
 #    machdep="alpha_mach_dep.lo"
 #    ;;
+ i?86-*-solaris2.[[89]]*)
+    AC_DEFINE(SOLARIS25_PROC_VDB_BUG_FIXED)
+    ;;
+ alpha-*-openbsd*)
+    if test x"${ac_cv_lib_dl_dlopen}" != xyes ; then
+       AC_MSG_WARN(OpenBSD/Alpha without dlopen(). Shared library support is disabled)
+       AM_DISABLE_SHARED
+    fi
+    ;;
  mipstx39-*-elf*)
     machdep="mips_ultrix_mach_dep.lo"
     AC_DEFINE(STACKBASE, __stackbase)
@@ -172,6 +181,9 @@ case "$host" in
  sparc-sun-solaris2.3*)
     AC_DEFINE(SUNOS53_SHARED_LIB)
     ;;
+ ia64-*-*)
+    machdep="mach_dep.lo ia64_save_regs_in_stack.lo"
+    ;;
 esac
 if test x"$machdep" = x; then
    machdep="mach_dep.lo"
@@ -232,7 +244,11 @@ AC_ARG_ENABLE(full-debug,
     AC_DEFINE(KEEP_BACK_PTRS)
     AC_DEFINE(DBG_HDRS_ALL)
     case $host in
+      ia64-*-linux* )
+	AC_DEFINE(MAKE_BACK_GRAPH)
+      ;;
       x86-*-linux* | i586-*-linux* | i686-*-linux* )
+	AC_DEFINE(MAKE_BACK_GRAPH)
 	AC_MSG_WARN("Client must not use -fomit-frame-pointer.")
 	AC_DEFINE(SAVE_CALL_COUNT, 8)
       ;;