RFR: JDK-8034179: Clean up nio genConstants

[Magnus Ihse Bursie]

On 2014-02-11 12:31, Erik Joelsson wrote:
> Here is a second patch for cleaning up gensrc tools source. This time 
> it's nio related.
>
> * Move genUnixConstants.c, genSolarisConstants.c and 
> genSocketOptionRegistry.c to make/src/native/...
> * Rename pregenerated versions of these generated files to 
> *.java.template to avoid having to exclude them when compiling java code.
> * Move the output of the executable binaries to 
> $(JDK_OUTPUTDIR)/btnative away from the gensrc dir where we expect to 
> find java sources.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8034179
> Webrev: http://cr.openjdk.java.net/~erikj/8034179/webrev.jdk.01/

Yay! More cleanup! It feels so good!

While it does look okay, I'm wondering if it wouldn't look better to do 
something like:

ifeq ($(wildcard $(JDK_TOPDIR)/src/closed/solaris/classes/sun/nio/ch/SocketOptionRegistry-$(OPENJDK_TARGET_OS)-$(OPENJDK_TARGET_CPU_ARCH).java.template), )
   # Copy pre-generated file if it exists
   $(JDK_OUTPUTDIR)/gensrc/sun/nio/ch/SocketOptionRegistry.java: \
       $(JDK_TOPDIR)/src/closed/solaris/classes/sun/nio/ch/SocketOptionRegistry-$(OPENJDK_TARGET_OS)-$(OPENJDK_TARGET_CPU_ARCH).java.template
	$(call install-file)
else
   # Generate new on on build platform -- it must match target platform to work properly!
   $(JDK_OUTPUTDIR)/gensrc/sun/nio/ch/SocketOptionRegistry.java: $(BUILD_GENSRC_SOR_EXE)
	$(MKDIR) -p $(@D)
	$(RM) $@ $@.tmp
	NAWK="$(NAWK)" SH="$(SH)" $(SH) -e $(JDK_TOPDIR)/make/scripts/addNotices.sh "$(SOR_COPYRIGHT_YEARS)" > $@.tmp
	$(BUILD_GENSRC_SOR_EXE) >> $@.tmp
	$(MV) $@.tmp $@
endif

Or are we using HAS_SOCKET_OPTION_REGISTRY elsewhere?

/Magnus