hotspot/make/altsrc.make
author mduigou
Tue, 10 May 2011 12:14:07 -0700
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permissions -rw-r--r--
Merge
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#
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# Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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#
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# This code is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License version 2 only, as
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# published by the Free Software Foundation.
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#
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# This code is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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# version 2 for more details (a copy is included in the LICENSE file that
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# accompanied this code).
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#
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# You should have received a copy of the GNU General Public License version
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# 2 along with this work; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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# or visit www.oracle.com if you need additional information or have any
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# questions.
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#  
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#
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# This file defines variables and macros which are used in the makefiles to 
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# allow distributions to augment or replace common hotspot code with 
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# distribution-specific source files.
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# Requires: GAMMADIR
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# Provides:
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#   variables: HS_COMMON_SRC, HS_ALT_SRC, HS_COMMON_SRC_REL, and HS_ALT_SRC_REL
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#   functions: altsrc-equiv, if-has-altsrc, altsrc, altsrc-replace
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HS_COMMON_SRC_REL=src
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# This needs to be changed to a more generic location, but we keep it as this 
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# for now for compatibility
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HS_ALT_SRC_REL=src/closed
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HS_COMMON_SRC=$(GAMMADIR)/$(HS_COMMON_SRC_REL)
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HS_ALT_SRC=$(GAMMADIR)/$(HS_ALT_SRC_REL)
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## altsrc-equiv 
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# 
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# Convert a common source path to an alternative source path
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#
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# Parameter: An absolute path into the common sources
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# Result: The matching path to the alternate-source location
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#
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altsrc-equiv=$(subst $(HS_COMMON_SRC)/,$(HS_ALT_SRC)/,$(1))
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## if-has-altsrc
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#
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# Conditional macro to test for the existence of an alternate source path
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#
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# Parameter: An absolute path into the common sources
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# Parameter: Result if the alternative-source location exists
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# Parameter: Result if the alternative-source location does not exist
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# Result: expands to parameter 2 or 3 depending on existence of alternate source
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#
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if-has-altsrc=$(if $(wildcard $(call altsrc-equiv,$(1))),$(2),$(3))
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## altsrc
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#
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# Converts common source path to alternate source path if the alternate 
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# path exists, otherwise evaluates to nul (empty string)
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# 
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# Parameter: An absolute path into the common sources
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# Result: The equivalent path to the alternate-source location, if such a 
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#         location exists on the filesystem.  Otherwise it expands to empty.
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# 
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altsrc=$(call if-has-altsrc,$(1),$(call altsrc-equiv,$(1)))
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## commonsrc
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# 
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# Returns parameter.
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#
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commonsrc=$(1)
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## altsrc-replace
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#
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# Converts a common source path to an alternate source path if the alternate
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# source path exists.  Otherwise it evaluates to the input common source path.
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#
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# Parameter: An absolute path into the common sources
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# Result: A path to either the common or alternate sources
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#
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altsrc-replace=$(call if-has-altsrc,$(1),$(call altsrc-equiv,$(1)),$(1))