Use autoconf to determine whether system has POSIX signals,

instead of relying on port's os.h to tell us.  (Needed for HPUX
where system major version is not enough info.)
configure unsets USE_TK if X libraries not found.
doc/Makefile uses gzcat or zcat as found by autoconf.

Author: tglsfdc

doc/Makefile

@@ -8,14 +8,15 @@
 #
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/doc/Makefile,v 1.11 1998/10/20 23:14:35 momjian Exp $
+#    $Header: /cvsroot/pgsql/doc/Makefile,v 1.12 1998/11/29 05:30:13 tgl Exp $
 #
 #----------------------------------------------------------------------------
 
 PGDOCS= $(POSTGRESDIR)/doc
 SRCDIR= ../src
 
 TAR= tar
+GZCAT= zcat
 
 # Pick up Makefile.global from the source area
 # This is the only resource from the code source area and is optional.
@@ -73,6 +74,6 @@ man::
 %:	%.tar.gz
 	rm -rf ./$@ $(PGDOCS)/$*
 	if test ! -d $(PGDOCS)/$* ; then mkdir $(PGDOCS)/$* ; fi
-	zcat $< | $(TAR) xf - -C $(PGDOCS)/$*
+	$(GZCAT) $< | (cd $(PGDOCS)/$* ; $(TAR) xf - )
 #	touch ./$*
 

src/Makefile.global.in

@@ -7,7 +7,7 @@
 #
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/Makefile.global.in,v 1.53 1998/10/30 04:53:55 scrappy Exp $
+#    $Header: /cvsroot/pgsql/src/Makefile.global.in,v 1.54 1998/11/29 05:30:14 tgl Exp $
 #
 # NOTES
 #    Essentially all Postgres make files include this file and use the 
@@ -209,14 +209,21 @@ CFLAGS_SL= @SHARED_LIB@
 LDFLAGS= @LDFLAGS@ @LIBS@
 DLSUFFIX= @DLSUFFIX@
 LN_S= @LN_S@
+TAR= @tar@
+GZCAT= @GZCAT@
 
 ##############################################################################
 #
 # Additional platform-specific settings
 #
 
+# Name of the target platform.
 PORTNAME= @PORTNAME@
 
+# Various grungy items needed to configure some platforms.
+HAVE_POSIX_SIGNALS= @HAVE_POSIX_SIGNALS@
+HPUXMATHLIB= @HPUXMATHLIB@
+
 include $(SRCDIR)/Makefile.port
 
 ##############################################################################