[csw-devel] SF.net SVN: gar:[14855] csw/mgar/gar/v2/category.mk

[skayser at users.sourceforge.net]

Revision: 14855
          http://gar.svn.sourceforge.net/gar/?rev=14855&view=rev
Author:   skayser
Date:     2011-06-21 21:48:27 +0000 (Tue, 21 Jun 2011)

Log Message:
-----------
gar/v2: add sanity checks for required make features

Modified Paths:
--------------
    csw/mgar/gar/v2/category.mk

Modified: csw/mgar/gar/v2/category.mk
===================================================================
--- csw/mgar/gar/v2/category.mk	2011-06-21 13:29:21 UTC (rev 14854)
+++ csw/mgar/gar/v2/category.mk	2011-06-21 21:48:27 UTC (rev 14855)
@@ -5,7 +5,20 @@
 # is slightly misleading and could be subject to future change.
 #
 
-# Determine this file's directory, i.e. the GAR base directory
+# Safety check, we need GNU make >= 3.81 for the magic further below,
+# more precisly: 3.80 for $(MAKEFILE_LIST), 3.81 for $(lastword ...)
+# c.f.: http://cvs.savannah.gnu.org/viewvc/make/NEWS?root=make&view=markup
+ifeq (,$(and $(MAKEFILE_LIST),$(lastword test)))
+define error_msg
+GNU make >= 3.81 required.
+Try "pkgutil -i gmake" and prepend /opt/csw/bin to your $$PATH.
+endef
+  $(error $(error_msg))
+endif
+
+# Determine this file's directory, i.e. the GAR base directory. We
+# need to do this dynamically as we don't want to rely on the presence
+# of gar/ symlinks in each build directory.
 GARDIR := $(dir $(lastword $(MAKEFILE_LIST)))
 
 ifeq (,$(wildcard $(GARDIR)/categories/$(CATEGORIES)/category.mk))


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