Reorganize code to allow path-relative installs.

Create new get_* functions to access compiled-in paths and adjust if
relative installs are to be used.

Clean up substitute_libpath_macro() code.

src/interfaces/ecpg/preproc/Makefile

@@ -1,4 +1,4 @@
-# $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/Makefile,v 1.103 2004/04/30 04:14:06 momjian Exp $
+# $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/Makefile,v 1.104 2004/05/17 14:35:34 momjian Exp $
 
 subdir = src/interfaces/ecpg/preproc
 top_builddir = ../../../..
@@ -11,8 +11,6 @@ PATCHLEVEL=0
 override CPPFLAGS := -I$(srcdir)/../include -I$(srcdir) $(CPPFLAGS) \
 	-DMAJOR_VERSION=$(MAJOR_VERSION) \
 	-DMINOR_VERSION=$(MINOR_VERSION) -DPATCHLEVEL=$(PATCHLEVEL) \
-	-DINCLUDEDIR=\"$(includedir)\" \
-	-DPKGINCLUDEDIR=\"$(pkgincludedir)\" \
 	-DFRONTEND
 
 ifeq ($(GCC), yes)
@@ -20,15 +18,18 @@ override CFLAGS += -Wno-error
 endif
 override CFLAGS += $(PTHREAD_CFLAGS)
 
-OBJS=preproc.o type.o ecpg.o ecpg_keywords.o output.o\
-    keywords.o c_keywords.o ../ecpglib/typename.o descriptor.o variable.o
-
+OBJS=	preproc.o type.o ecpg.o ecpg_keywords.o output.o\
+	keywords.o c_keywords.o ../ecpglib/typename.o descriptor.o variable.o \
+	$(filter exec.o, $(LIBOBJS))
 
 all: submake-libpgport ecpg
 
 ecpg: $(OBJS)
 	$(CC) $(CFLAGS) $(LDFLAGS) $^ $(LIBS) $(PTHREAD_LIBS) -o $@$(X)
 
+exec.c: % : $(top_srcdir)/src/port/%
+	rm -f $@ && $(LN_S) $< .
+
 # pgc is compiled as part of preproc
 preproc.o: $(srcdir)/pgc.c
 
@@ -65,7 +66,7 @@ uninstall:
 	rm -f $(DESTDIR)$(bindir)/ecpg$(X)
 
 clean distclean:
-	rm -f *.o ecpg$(X)
+	rm -f *.o ecpg$(X) exec.c
 # garbage from partial builds
 	@rm -f y.tab.c y.tab.h
 # garbage from development

src/interfaces/ecpg/preproc/ecpg.c

@@ -1,4 +1,4 @@
-/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/ecpg.c,v 1.86 2004/05/12 13:38:48 momjian Exp $ */
+/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/ecpg.c,v 1.87 2004/05/17 14:35:34 momjian Exp $ */
 
 /* New main for ecpg, the PostgreSQL embedded SQL precompiler. */
 /* (C) Michael Meskes <meskes@postgresql.org> Feb 5th, 1998 */
@@ -120,7 +120,9 @@ main(int argc, char *const argv[])
 				out_option = 0;
 	struct _include_path *ip;
 	const char *progname;
-
+	char	   my_exec_path[MAXPGPATH];
+	char	   include_path[MAXPGPATH];
+	
 	progname = get_progname(argv[0]);
 
 	if (argc > 1)
@@ -138,6 +140,8 @@ main(int argc, char *const argv[])
 		}
 	}
 
+	find_my_exec(argv[0], my_exec_path);
+
 	while ((c = getopt(argc, argv, "vcio:I:tD:dC:r:h")) != -1)
 	{
 		switch (c)
@@ -175,12 +179,18 @@ main(int argc, char *const argv[])
 			case 'C':
 				if (strncmp(optarg, "INFORMIX", strlen("INFORMIX")) == 0)
 				{
+					char	   pkginclude_path[MAXPGPATH];
+					char	   informix_path[MAXPGPATH];
+				
 					compat = (strcmp(optarg, "INFORMIX") == 0) ? ECPG_COMPAT_INFORMIX : ECPG_COMPAT_INFORMIX_SE;
 					/* system_includes = true; */
 					add_preprocessor_define("dec_t=decimal");
 					add_preprocessor_define("intrvl_t=interval");
 					add_preprocessor_define("dtime_t=timestamp");
-					add_include_path(PKGINCLUDEDIR "/informix/esql");
+
+					get_pkginclude_path(my_exec_path, pkginclude_path);
+					snprintf(informix_path, MAXPGPATH, "%s/informix/esql", pkginclude_path);
+					add_include_path(informix_path);
 				}
 				else
 				{
@@ -216,7 +226,8 @@ main(int argc, char *const argv[])
 
 	add_include_path(".");
 	add_include_path("/usr/local/include");
-	add_include_path(INCLUDEDIR);
+	get_include_path(my_exec_path, include_path);
+	add_include_path(include_path);
 	add_include_path("/usr/include");
 
 	if (verbose)

src/interfaces/libpq/Makefile

@@ -4,7 +4,7 @@
 #
 # Copyright (c) 1994, Regents of the University of California
 #
-# $PostgreSQL: pgsql/src/interfaces/libpq/Makefile,v 1.105 2004/05/10 23:09:04 momjian Exp $
+# $PostgreSQL: pgsql/src/interfaces/libpq/Makefile,v 1.106 2004/05/17 14:35:34 momjian Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -19,7 +19,13 @@ SO_MAJOR_VERSION= 3
 SO_MINOR_VERSION= 2
 
 override CPPFLAGS := -I$(srcdir) $(CPPFLAGS) $(PTHREAD_CFLAGS) -DFRONTEND -DSYSCONFDIR='"$(sysconfdir)"'
-override CFLAGS += $(PTHREAD_CFLAGS)
+override CFLAGS += $(PTHREAD_CFLAGS) \
+		     -DPGBINDIR=\"$(bindir)\" \
+		     -DPGDATADIR=\"$(datadir)\" \
+		     -DSYSCONFDIR='"$(sysconfdir)"' \
+		     -DINCLUDEDIR=\"$(includedir)\" \
+		     -DPKGINCLUDEDIR=\"$(pkgincludedir)\" \
+		     -DPKGLIBDIR=\"$(pkglibdir)\"
 
 OBJS=	fe-auth.o fe-connect.o fe-exec.o fe-misc.o fe-print.o fe-lobj.o \
 	fe-protocol2.o fe-protocol3.o pqexpbuffer.o pqsignal.o fe-secure.o \