Consolidate makefile code for setting top_srcdir, srcdir and VPATH.

Responsibility was formerly split between Makefile.global and pgxs.mk.
As a result of commit b58233c71b93a32fcab7219585cafc25a27eb769, in the
PGXS case, these variables were unset while parsing Makefile.global and
callees.  Inclusion of Makefile.custom did not work from PGXS, and the
subtle difference seemed like a recipe for future bugs.  Back-patch to
9.4, where that commit first appeared.

diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index 577299576a649d1498881a9376e4de13988291fd..39a7879bb69caed1fcbc4c2b0d587a953a760a2c 100644 (file)
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -40,9 +40,24 @@ VERSION = @PACKAGE_VERSION@
 MAJORVERSION = @PG_MAJORVERSION@
 VERSION_NUM = @PG_VERSION_NUM@
 
-# Support for VPATH builds
-# (PGXS VPATH support is handled separately in pgxs.mk)
-ifndef PGXS
+# Set top_srcdir, srcdir, and VPATH.
+ifdef PGXS
+top_srcdir = $(top_builddir)
+
+# If VPATH is set or Makefile is not in current directory we are building
+# the extension with VPATH so we set the variable here.
+ifdef VPATH
+srcdir = $(VPATH)
+else
+ifeq ($(CURDIR),$(dir $(firstword $(MAKEFILE_LIST))))
+srcdir = .
+VPATH =
+else
+srcdir = $(dir $(firstword $(MAKEFILE_LIST)))
+VPATH = $(srcdir)
+endif
+endif
+else # not PGXS
 vpath_build = @vpath_build@
 abs_top_builddir = @abs_top_builddir@
 abs_top_srcdir = @abs_top_srcdir@

diff --git a/src/makefiles/pgxs.mk b/src/makefiles/pgxs.mk
index b5113726841aea42664ba364e0b91cf35dd8d836..b6874ced91c750adb71584991b36894aa5348059 100644 (file)
--- a/src/makefiles/pgxs.mk
+++ b/src/makefiles/pgxs.mk
@@ -62,21 +62,6 @@ ifdef PGXS
 top_builddir := $(dir $(PGXS))../..
 include $(top_builddir)/src/Makefile.global
 
-top_srcdir = $(top_builddir)
-# If VPATH is set or Makefile is not in current directory we are building
-# the extension with VPATH so we set the variable here.
-ifdef VPATH
-srcdir = $(VPATH)
-else
-ifeq ($(CURDIR),$(dir $(firstword $(MAKEFILE_LIST))))
-srcdir = .
-VPATH =
-else
-srcdir = $(dir $(firstword $(MAKEFILE_LIST)))
-VPATH = $(srcdir)
-endif
-endif
-
 # These might be set in Makefile.global, but if they were not found
 # during the build of PostgreSQL, supply default values so that users
 # of pgxs can use the variables.