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 necessary.
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: excelpoi.cpp excelpoi.h
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 begin.
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 file.
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
[EMAIL PROTECTED]@
PKG_CFLAGS=-I$(JAVA_HOME)/include -D_REENTRANT -D_GNU_SOURCE PKG_LIBS=-L$(JAVA_HOME)/jre/lib/@ARCH@/client -ljvm
*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, Whit
<Makefile> archExpr = case "`uname -m`" in \ i[3-6]86 | ia32) \ echo i386 \ ;; \ sparc*) \ echo sparc \ ;; \ *) \ uname -m \ ;; \ esac
ARCH = $(shell $(archExpr) )
JAVA_HOME=/opt/blackdown-jdk-1.4.1/
INCLUDES=-I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/linux -I/usr/local/lib/R/include
LIBS=-L$(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 $@ $<
</Makefile>
-- Brian D. Ripley, [EMAIL PROTECTED] 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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