[Rd] Makefile vs Makevars vs configure
Prof Brian Ripley
ripley at stats.ox.ac.uk
Wed Dec 29 20:24:41 CET 2004
On Wed, 29 Dec 2004, Whit Armstrong wrote:
> Apologies in advance for the long post.
> I'm currently using a Makefile to build my shared library. Pursuant to the
> R-exts manual, I'd like to switch to a Makevars file or a configure file if
> Having never used these types of make utilities before, I'm a bit lost.
> My package is quite simple. It only has one source file and one header:
> The reason I need help with Makevars is because it needs jni.h from the
> user's JAVA_HOME/include and jni_md.h from the user's
> JAVA_HOME/include/OS_TYPE directory.
> In addition, it needs libjvm.so from the user's
> JAVA_HOME/jre/lib/ARCH/client directory.
> I've looked at the SJava package with the idea of using a similar configure
> script, but I was hoping I could just get by with a Makevars file rather
> than a configure script.
> I would appreciate any pointers, as I'm not really sure exactly where to
> I suppose if I can find the values of JAVA_HOME, ARCH, and OS_TYPE, then I
> can fill in the values I need using PKG_LIBS and PKG_INCLUDE in the Makevars
Right. So you need Makevars.in and a configure script to fathom out
JAVA_HOME and ARCH. Not so sure about OS_TYPE, as your include directories
will depend on whose JRE this is, I think. Something like
PKG_CFLAGS=-I$(JAVA_HOME)/include -D_REENTRANT -D_GNU_SOURCE
*However* as your libjvm is shared then you will need to ensure
$(JAVA_HOME)/jre/lib/$(ARCH)/client is in the LD_LIBRARY_PATH and then you
don't need the -L.
> below is the makefile I'm currently using for your reference.
> Thanks in advance,
> archExpr = case "`uname -m`" in \
> i[3-6]86 | ia32) \
> echo i386 \
> ;; \
> sparc*) \
> echo sparc \
> ;; \
> *) \
> uname -m \
> ;; \
> ARCH = $(shell $(archExpr) )
> INCLUDES=-I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/linux
> LIBS=-L$(JAVA_HOME)/jre/lib/$(ARCH)/client -ljvm
> # The recommended c compiler flags
> CFLAGS=-D_REENTRANT -D_GNU_SOURCE
> all: excelpoi.so
> excelpoi.so: excelpoi.cpp excelpoi.h
> $(CXX) -O2 $(CFLAGS) $(INCLUDES) $(LIBS) -shared -fPIC -o $@ $<
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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