This is the minimal version of the Darwin support patch from

Bruce Hartzler <bruceh@mail.utexas.edu>.  It contains shared library
support, regression test map, and the usual template files.  The dynamic
loader is missing, the spin lock code apparently doesn't assemble due to
syntax problems, and semaphores are to be hoped for from Apple.

configure.in

@@ -64,6 +64,7 @@ case $host_os in
     beos*) template=beos ;;
     bsdi*) template=bsdi ;;
   cygwin*) template=win ;;
+  darwin*) template=darwin ;;
     dgux*) template=dgux ;;
  freebsd*) template=freebsd ;;
     hpux*) template=hpux ;;

src/Makefile.shlib

@@ -6,7 +6,7 @@
 # Copyright (c) 1998, Regents of the University of California
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/Makefile.shlib,v 1.30 2000/10/27 23:59:39 petere Exp $
+#    $Header: /cvsroot/pgsql/src/Makefile.shlib,v 1.31 2000/10/31 19:55:18 petere Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -52,9 +52,9 @@
 # Got that?  Look at src/interfaces/libpq/Makefile for an example.
 
 ifndef cplusplus
-COMPILER = $(CC)
+COMPILER = $(CC) $(CFLAGS)
 else
-COMPILER = $(CXX)
+COMPILER = $(CXX) $(CXXFLAGS)
 endif
 
 
@@ -103,6 +103,11 @@ ifeq ($(PORTNAME), aix)
   SHLIB_LINK		+= -lc
 endif
 
+ifeq ($(PORTNAME), darwin)
+  shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
+  LINK.shared		= $(COMPILER) $(CFLAGS_SL)
+endif
+
 ifeq ($(PORTNAME), openbsd)
   shlib			:= lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)
   ifdef ELF_SYSTEM

src/backend/port/dynloader/darwin.c

+/*
+ * This is a place holder until someone supplies a dynamic loader
+ * interface for this platform.
+ *
+ * $Header: /cvsroot/pgsql/src/backend/port/dynloader/darwin.c,v 1.1 2000/10/31 19:55:19 petere Exp $
+ */
+
+#include "postgres.h"
+#include "fmgr.h"
+#include "utils/dynamic_loader.h"
+#include "dynloader.h"
+
+void *
+pg_dlopen(char *filename)
+{
+	return (void *) NULL;
+}
+
+PGFunction
+pg_dlsym(void *handle, char *funcname)
+{
+	return NULL;
+}
+
+void
+pg_dlclose(void *handle)
+{
+}
+
+char *
+pg_dlerror()
+{
+	static char errmsg[] = "the dynamic loader for darwin doesn't exist yet";
+
+	return errmsg;
+}

src/backend/port/dynloader/darwin.h

+/* $Header: /cvsroot/pgsql/src/backend/port/dynloader/darwin.h,v 1.1 2000/10/31 19:55:19 petere Exp $ */
+void	   *pg_dlopen(char *filename);
+PGFunction	pg_dlsym(void *handle, char *funcname);
+void		pg_dlclose(void *handle);
+char	   *pg_dlerror();

src/include/port/darwin.h

+#define HAS_TEST_AND_SET
+#if defined(__powerpc__)
+typedef unsigned int slock_t;
+#else
+typedef unsigned char slock_t;
+#endif

src/makefiles/Makefile.darwin

+AROPT = cr
+ 
+DLSUFFIX = .so
+CFLAGS_SL = -bundle -undefined suppress
+ 
+%.so: %.o
+        $(CC) $(CFLAGS) $(CFLAGS_SL) -o $@ $<

src/template/darwin

+# regular cpp is broken in current development releases
+CC="$CC -traditional-cpp"
+# be on safe side while they sort out their compiler
+CFLAGS=-O0

src/test/regress/resultmap

@@ -12,6 +12,7 @@ float8/.*-qnx=float8-exp-three-digits
 float8/alpha.*-dec-osf=float8-fp-exception
 float8/i.86-pc-cygwin=float8-small-is-zero
 geometry/.*-bsdi=geometry-positive-zeros-bsd
+geometry/.*-darwin=geometry-positive-zeros
 geometry/.*-freebsd=geometry-positive-zeros
 geometry/.*-freebsd4.0=geometry-positive-zeros-bsd
 geometry/.*-irix6=geometry-irix
@@ -35,6 +36,7 @@ horology/sparc-sun-solaris=horology-solaris-1947
 horology/.*-sysv5uw=horology-solaris-1947
 int2/.*-aix4=int2-too-large
 int2/.*-bsdi=int2-too-large
+int2/.*-darwin=int2-too-large
 int2/.*-freebsd=int2-too-large
 int2/.*-irix6=int2-too-large
 int2/.*-netbsd=int2-too-large
@@ -50,6 +52,7 @@ int2/.*-sysv5uw=int2-too-large
 int2/.*-beos=int2-range-error
 int4/.*-aix4=int4-too-large
 int4/.*-bsdi=int4-too-large
+int4/.*-darwin=int4-too-large
 int4/.*-freebsd=int4-too-large
 int4/.*-irix6=int4-too-large
 int4/.*-netbsd=int4-too-large