Dear R-developpers
This concerns a problem I posted about half a year ago on the R-help list
and to which I got some answer by Duncan Temple Lang (see below), but the
basic problem still continues. Even though I managed a workaround which is
sufficient for me Martin Maechler asked me to send a toy example of the
problem to R-bugs. So that's what I try here.
The following Makefile will not work:
----------------------------------------
.PHONY: tst.o
tst.o: tst.c
R CMD COMPILE tst.c
----------------------------------------
It results in:
----------------------------------------
cd /u/holzer/CurrentWork/algen/C/temp/
make
R CMD COMPILE tst.c
make[1]: Entering directory `/users/u1/staff/holzer/CurrentWork/algen/C/temp'
R CMD COMPILE tst.c
make[2]: Entering directory `/users/u1/staff/holzer/CurrentWork/algen/C/temp'
make[2]: *** No rule to make target `w'. Stop.
make[2]: Leaving directory `/users/u1/staff/holzer/CurrentWork/algen/C/temp'
make[1]: *** [tst.o] Error 2
make[1]: Leaving directory `/users/u1/staff/holzer/CurrentWork/algen/C/temp'
make: *** [tst.o] Error 2
Compilation exited abnormally with code 2 at Mon Mar 26 15:10:07
----------------------------------------
The following alternative ends in an infinite loop:
----------------------------------------
.PHONY: tst.o
tst.o: tst.c
MAKEFLAGS="CFLAGS=" R CMD COMPILE tst.c
----------------------------------------
----------------------------------------
cd /u/holzer/CurrentWork/algen/C/temp/
make
MAKEFLAGS="CFLAGS=" R CMD COMPILE tst.c
make[1]: Entering directory `/users/u1/staff/holzer/CurrentWork/algen/C/temp'
MAKEFLAGS="CFLAGS=" R CMD COMPILE tst.c
make[2]: Entering directory `/users/u1/staff/holzer/CurrentWork/algen/C/temp'
MAKEFLAGS="CFLAGS=" R CMD COMPILE tst.c
make[3]: Entering directory `/users/u1/staff/holzer/CurrentWork/algen/C/temp'
MAKEFLAGS="CFLAGS=" R CMD COMPILE tst.c
make[4]: Entering directory `/users/u1/staff/holzer/CurrentWork/algen/C/temp'
...
----------------------------------------
(My workaround consists in using R SHLIB instead of R COMPILE (which works
perfectly) and removing the files that disturb or that I don't need.)
I work under Linux. tst.c consists just of one line:
int x() {return(1);}
platform i686-pc-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status
major 1
minor 2.2
year 2001
month 02
day 26
language R
Here is Duncan's answer:
I took a quick look at the R COMPILE problem and it seems that there
are in fact two problems. One is the problem with the attempt to
build a target `w'. And the other is that if that error didn't arise,
you would have an infinite loop.
Here is quick fix to your problem. Add the line
include $(R_HOME)/etc/Makeconf
to your Makefile. Then, make will compile imageio.o with the correct flags.
eyore[RCompile-174]>make
gcc -I/home2/FlowData/AltProjects/R-shared//include -I/usr/local/include -mieee-fp -D__NO_MATH_INLINES -fPIC -g -O2 -c imageio.c -o imageio.o
That should be enough to get things working. The more detailed
explanation is as follows.
a) The rule
imageio.o: imageio.c
R COMPILE imageio.c
is executed by the first call to make.
The COMPILE script expands this to call
make -f $R_HOME/etc/Makeconf -f Makefile imageio.o
At this point, this second make process sees the same rule, and does
the same thing. Hence, you have infinite recursion.
b) The problem about the target `w' is a problem resulting from the R
COMPILE script being called recursively from a make process. The
second make process getting called via the COMPILE script is getting
the value of the make variable MAKEFLAG from the top-level make you
executed manually. This is implicitly set to w (meaning to print
directory information before and after the makefile is "executed")
and not -w. At this point, I am not certain whether this is an
R oversight or a GNU make bug.
Peter ____________________________________________________________ Peter Holzer phone: + 41 1 632 46 34 Seminar fuer Statistik, LEO C14 fax: + 41 1 632 12 28 (Leonhardstr. 27) <holzer@stat.math.ethz.ch> ETH (Federal Inst. Technology) 8092 Zurich http://stat.ethz.ch/~holzer/ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._