Modify the platform-specific makefiles so that macro 'rpath' is defined

in terms of macro 'rpathdir', as I proposed a few weeks ago.  In itself
this commit shouldn't change the behavior at all, but it opens the door
to using special rpaths for the PL shared libraries, as seems to be
needed for plperl in particular.

src/Makefile.global.in

@@ -1,5 +1,5 @@
 # -*-makefile-*-
-# $PostgreSQL: pgsql/src/Makefile.global.in,v 1.204 2004/10/20 02:12:07 neilc Exp $
+# $PostgreSQL: pgsql/src/Makefile.global.in,v 1.205 2004/11/19 00:41:38 tgl Exp $
 
 #------------------------------------------------------------------------------
 # All PostgreSQL makefiles include this file and use the variables it sets,
@@ -284,6 +284,10 @@ ELF_SYSTEM= @ELF_SYS@
 # Pull in platform-specific magic
 include $(top_builddir)/src/Makefile.port
 
+# Set up rpath if enabled.  By default it will point to our libdir,
+# but individual Makefiles can force other rpath paths if needed.
+rpathdir = $(libdir)
+
 ifeq ($(enable_rpath), yes)
 LDFLAGS += $(rpath)
 endif

src/makefiles/Makefile.bsdi

@@ -14,7 +14,7 @@ endif
 
 ifeq ($(DLSUFFIX), .so)
 CFLAGS_SL = -fpic
-rpath = -Wl,-rpath,$(libdir)
+rpath = -Wl,-rpath,$(rpathdir)
 export_dynamic = -export-dynamic
 shlib_symbolic = -Wl,-Bsymbolic
 else

src/makefiles/Makefile.freebsd

@@ -2,7 +2,7 @@ AROPT = cr
 
 ifdef ELF_SYSTEM
 export_dynamic = -export-dynamic
-rpath = -R$(libdir)
+rpath = -R$(rpathdir)
 shlib_symbolic = -Wl,-Bsymbolic -lc
 endif
 

src/makefiles/Makefile.hpux

@@ -16,14 +16,12 @@ endif
 # correctly in the LP64 data model.
 LIBS := -lxnet $(LIBS)
 
-# Embed 'libdir' as the shared library search path so that the executables
+# Set up rpath so that the executables don't need SHLIB_PATH to be set.
-# don't need SHLIB_PATH to be set.  (We do not observe the --enable-rpath
+# (Note: --disable-rpath is a really bad idea on this platform...)
-# switch here because you'd get rather bizarre behavior if you leave this
-# option off.)
 ifeq ($(with_gnu_ld), yes)
-   LDFLAGS += -Wl,-rpath -Wl,$(libdir)
+   rpath = -Wl,-rpath,$(rpathdir)
 else
-   LDFLAGS += -Wl,+b -Wl,$(libdir)
+   rpath = -Wl,+b,$(rpathdir)
 endif
 
 # catch null pointer dereferences

src/makefiles/Makefile.irix

@@ -1,6 +1,6 @@
 MK_NO_LORDER= true
 AROPT = crs
-rpath = -Wl,-rpath,$(libdir)
+rpath = -Wl,-rpath,$(rpathdir)
 shlib_symbolic = -Wl,-B,symbolic
 
 DLSUFFIX = .so

src/makefiles/Makefile.linux

@@ -1,6 +1,6 @@
 AROPT = crs
 export_dynamic = -Wl,-E
-rpath = -Wl,-rpath,$(libdir)
+rpath = -Wl,-rpath,$(rpathdir)
 shlib_symbolic = -Wl,-Bsymbolic
 allow_nonpic_in_shlib = yes
 DLSUFFIX = .so

src/makefiles/Makefile.netbsd

@@ -2,10 +2,10 @@ AROPT = cr
 
 ifdef ELF_SYSTEM
 export_dynamic = -Wl,-E
-rpath = -Wl,-R$(libdir)
+rpath = -Wl,-R$(rpathdir)
 shlib_symbolic = -Wl,-Bsymbolic -lc
 else
-rpath = -R$(libdir)
+rpath = -R$(rpathdir)
 endif
 
 DLSUFFIX = .so

src/makefiles/Makefile.openbsd

@@ -2,7 +2,7 @@ AROPT = cr
 
 ifdef ELF_SYSTEM
 export_dynamic = -Wl,-E
-rpath = -R$(libdir)
+rpath = -R$(rpathdir)
 shlib_symbolic = -Wl,-Bsymbolic
 endif
 

src/makefiles/Makefile.osf

@@ -1,7 +1,7 @@
 AROPT = crs
 DLSUFFIX = .so
 CFLAGS_SL =
-rpath = -rpath $(libdir)
+rpath = -rpath $(rpathdir)
 
 %.so: %.o
 	$(LD) -shared -expect_unresolved '*' -o $@ $<

src/makefiles/Makefile.solaris

@@ -1,12 +1,12 @@
-# $PostgreSQL: pgsql/src/makefiles/Makefile.solaris,v 1.10 2003/11/29 19:52:12 pgsql Exp $
+# $PostgreSQL: pgsql/src/makefiles/Makefile.solaris,v 1.11 2004/11/19 00:41:39 tgl Exp $
 
 AROPT = crs
 
 ifeq ($(with_gnu_ld), yes)
 export_dynamic = -Wl,-E
-rpath = -Wl,-rpath,$(libdir)
+rpath = -Wl,-rpath,$(rpathdir)
 else
-rpath = -R$(libdir)
+rpath = -R$(rpathdir)
 endif
 shlib_symbolic = -Wl,-Bsymbolic
 

src/makefiles/Makefile.unixware

@@ -7,9 +7,9 @@ endif
 
 ifeq ($(ld_R_works), yes)
 ifeq ($(with_gnu_ld), yes)
-	rpath = -Wl,-rpath,$(libdir)
+	rpath = -Wl,-rpath,$(rpathdir)
 else
-	rpath = -Wl,-R$(libdir)
+	rpath = -Wl,-R$(rpathdir)
 endif
 endif
 shlib_symbolic = -Wl,-Bsymbolic