--- rpl/Attic/configure	2011/09/16 14:42:01	1.80
+++ rpl/Attic/configure	2011/09/16 16:37:07	1.81
@@ -1464,7 +1464,7 @@ Optional Features:
   --disable-dependency-tracking  speeds up one-time build
   --enable-dependency-tracking   do not reject slow dependency extractors
   --enable-optimization   set compiler flags [default=environment variables -O3]
-  --enable-sysv-ipcs      use SystemV IPC functions [default=no]
+  --enable-sysv-ipcs      use SystemV IPC functions [default=guessed]
   --enable-full-static    build static RPL/2 engine [default=shared]
   --enable-final-encoding force final encoding [default=guessed]
   --enable-tex            provide the TeX support [default=guessed]
@@ -1888,6 +1888,48 @@ $as_echo "$ac_res" >&6; }
 
 } # ac_fn_c_check_func
 
+# ac_fn_c_try_run LINENO
+# ----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
+# that executables *can* be run.
+ac_fn_c_try_run ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: program exited with status $ac_status" >&5
+       $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+       ac_retval=$ac_status
+fi
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_run
+
 # ac_fn_c_check_type LINENO TYPE VAR INCLUDES
 # -------------------------------------------
 # Tests whether TYPE exists after having included INCLUDES, setting cache
@@ -1942,48 +1984,6 @@ $as_echo "$ac_res" >&6; }
 
 } # ac_fn_c_check_type
 
-# ac_fn_c_try_run LINENO
-# ----------------------
-# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
-# that executables *can* be run.
-ac_fn_c_try_run ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if { { ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_link") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
-  { { case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_try") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then :
-  ac_retval=0
-else
-  $as_echo "$as_me: program exited with status $ac_status" >&5
-       $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-       ac_retval=$ac_status
-fi
-  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-  as_fn_set_status $ac_retval
-
-} # ac_fn_c_try_run
-
 # ac_fn_c_compute_int LINENO EXPR VAR INCLUDES
 # --------------------------------------------
 # Tries to find the compile-time value of EXPR in a program that includes
@@ -6003,10 +6003,83 @@ else
 	IPCS_SYSV=yes
 fi
 else
-  IPCS_SYSV=no
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for POSIX semaphores" >&5
+$as_echo_n "checking for POSIX semaphores... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+int
+main ()
+{
+ int fd; char *sem = "/sem.test";
+fd = shm_open(sem , O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
+  close(fd);
+  shm_unlink(sem);
+  return(0);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  IPCS_SYSV=-UIPCS_SYSV; { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+  IPCS_SYSV=-DIPCS_SYSV; { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
 fi
 
 
+if test "$IPCS_SYSV" = "-UIPCS_SYSV"; then
+REG=$LDFLAGS
+LDFLAGS=-pthread
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for POSIX anonymous semaphores" >&5
+$as_echo_n "checking for POSIX anonymous semaphores... " >&6; }
+if test "$cross_compiling" = yes; then :
+  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot run test program while cross compiling
+See \`config.log' for more details" "$LINENO" 5; }
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <semaphore.h>
+
+int
+main ()
+{
+ sem_t sem;
+ if (sem_init(&sem, 1, 0) != 0) return(1);
+ sem_destroy(&sem);
+  return(0);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+  SEMAPHORES_NOMMES=-USEMAPHORES_NOMMES; { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+  SEMAPHORES_NOMMES=-DSEMAPHORES_NOMMES; { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+]
+LDFLAGS=$REG
+REG=""
+else
+	SEMAPHORES_NOMMES=-USEMAPHORES_NOMMES
+fi
+
 # Check whether --enable-full-static was given.
 if test "${enable_full_static+set}" = set; then :
   enableval=$enable_full_static;
@@ -9144,8 +9217,6 @@ case $OS in
     Darwin)
 		EXPORT_DYNAMIC=-Wl,-flat_namespace
 		NESTED_FUNCTIONS=-fnested-functions
-		SEMAPHORES_NOMMES=-DSEMAPHORES_NOMMES
-		IPCS_SYSV=-UIPCS_SYSV
 		CXXFLAGS="$CXXFLAGS -D_GLIBCXX_FULLY_DYNAMIC_STRING"
 		ac_configure_args="$ac_configure_args --with-readline=builtin \
 				--disable-shared --enable-static --enable-threads \
@@ -9159,8 +9230,6 @@ case $OS in
     Cygwin)
 		EXPORT_DYNAMIC=-Wl,--export-all-symbols
 		NESTED_FUNCTIONS=
-		SEMAPHORES_NOMMES=-USEMAPHORES_NOMMES
-		IPCS_SYSV=-UIPCS_SYSV
 		ac_configure_args="$ac_configure_args --with-readline=builtin \
 				--disable-shared --enable-static --enable-threads \
 				CFLAGS=\"$CFLAGS\" CXXFLAGS=\"$CXXFLAGS\" \
@@ -9173,8 +9242,6 @@ case $OS in
 	Interix)
 		EXPORT_DYNAMIC=-Wl,--export-all-symbols
 		NESTED_FUNCTIONS=
-		SEMAPHORES_NOMMES=-USEMAPHORES_NOMMES
-		IPCS_SYSV=-UIPCS_SYSV
 		ac_configure_args="$ac_configure_args --with-readline=builtin \
 				--disable-shared --enable-static --enable-threads \
 				CFLAGS=\"$CFLAGS\" CXXFLAGS=\"$CXXFLAGS\" \
@@ -9187,8 +9254,6 @@ case $OS in
     AIX)
 		EXPORT_DYNAMIC=-Wl,--export-dynamic
 		NESTED_FUNCTIONS=
-		SEMAPHORES_NOMMES=-DSEMAPHORES_NOMMES
-		IPCS_SYSV=-UIPCS_SYSV
 		ac_configure_args="$ac_configure_args --with-readline=builtin \
 				--disable-shared --enable-static --enable-threads \
 				CFLAGS=\"$CFLAGS\" CXXFLAGS=\"$CXXFLAGS\" \
@@ -9205,8 +9270,6 @@ case $OS in
 		OS=OS2
 		NESTED_FUNCTIONS=
 		EXPORT_DYNAMIC=-Zmap
-		SEMAPHORES_NOMMES=-USEMAPHORES_NOMMES
-		IPCS_SYSV=-DIPCS_SYSV
 		ac_configure_args="$ac_configure_args --without-readline \
 				--without-cairo --disable-shared --enable-static \
 				--enable-threads \
@@ -9223,8 +9286,6 @@ case $OS in
 		fi;
 		EXPORT_DYNAMIC=-Wl,--export-dynamic
 		NESTED_FUNCTIONS=
-		SEMAPHORES_NOMMES=-USEMAPHORES_NOMMES
-		IPCS_SYSV=-DIPCS_SYSV
 		ac_configure_args="$ac_configure_args --with-readline=builtin \
 				--disable-shared --enable-static --enable-threads \
 				CFLAGS=\"$CFLAGS\" CXXFLAGS=\"$CXXFLAGS\" \
@@ -9237,13 +9298,6 @@ case $OS in
     SunOS)
 		EXPORT_DYNAMIC=-Wl,--export-dynamic
 		NESTED_FUNCTIONS=
-		SEMAPHORES_NOMMES=-USEMAPHORES_NOMMES
-
-		if test $IPCS_SYSV = no; then
-			IPCS_SYSV=-UIPCS_SYSV
-		else
-			IPCS_SYSV=-DIPCS_SYSV
-		fi
 
 		ac_configure_args="$ac_configure_args --with-readline=builtin \
 				--disable-shared --enable-static --enable-threads \
@@ -9258,13 +9312,6 @@ case $OS in
     NetBSD)
 		EXPORT_DYNAMIC=-Wl,--export-dynamic
 		NESTED_FUNCTIONS=
-		SEMAPHORES_NOMMES=-USEMAPHORES_NOMMES
-
-		if test $IPCS_SYSV = no; then
-			IPCS_SYSV=-UIPCS_SYSV
-		else
-			IPCS_SYSV=-DIPCS_SYSV
-		fi
 
 		ac_configure_args="$ac_configure_args --with-readline=builtin \
 				--disable-shared --enable-static --enable-threads \
@@ -9280,13 +9327,6 @@ case $OS in
     *)
 		EXPORT_DYNAMIC=-Wl,--export-dynamic
 		NESTED_FUNCTIONS=
-		SEMAPHORES_NOMMES=-USEMAPHORES_NOMMES
-
-		if test $IPCS_SYSV = no; then
-			IPCS_SYSV=-UIPCS_SYSV
-		else
-			IPCS_SYSV=-DIPCS_SYSV
-		fi
 
 		ac_configure_args="$ac_configure_args --with-readline=builtin \
 				--disable-shared --enable-static --enable-threads \