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.
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 $@ $<
</Makefile>
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On Wed, 29 Dec 2004, Whit Armstrong wrote:> Apologies in advance for the long post. > > I'm currently using a Makefile to build my shared library. Pursuant to the > R-exts manual, I'd like to switch to a Makevars file or a configure file if > necessary. > > Having never used these types of make utilities before, I'm a bit lost. > > My package is quite simple. It only has one source file and one header: > excelpoi.cpp > excelpoi.h > > The reason I need help with Makevars is because it needs jni.h from the > user's JAVA_HOME/include and jni_md.h from the user's > JAVA_HOME/include/OS_TYPE directory. > > In addition, it needs libjvm.so from the user's > JAVA_HOME/jre/lib/ARCH/client directory. > > I've looked at the SJava package with the idea of using a similar configure > script, but I was hoping I could just get by with a Makevars file rather > than a configure script. > > I would appreciate any pointers, as I'm not really sure exactly where to > begin. > > I suppose if I can find the values of JAVA_HOME, ARCH, and OS_TYPE, then I > can fill in the values I need using PKG_LIBS and PKG_INCLUDE in the Makevars > file.Right. So you need Makevars.in and a configure script to fathom out JAVA_HOME and ARCH. Not so sure about OS_TYPE, as your include directories will depend on whose JRE this is, I think. Something like JAVA_HOME=@JAVA_HOME@ PKG_CFLAGS=-I$(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, ripley@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
On Dec 29, 2004, at 2:06 PM, Whit Armstrong wrote:> 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.That is virtually impossible unless you let the user add all paths manually. Each OS, platform, VM vendor and VM version(!) use different paths and you need different include directories and libs. What you end up doing in your Makefile is what the configure script does, so I see no benefit from not using it. AFAIR SJava doesn't detect Apple Java - you may have a look at rJava's configure script which tries to be a bit more general, but your mileage may vary. Cheers, Simon