[R] passing arguments to R CMD SHLIB

[Faheem Mitha]

Dear People,

I want to run gcc with optimisation turned on (-O2), and with -Wall (all
warnings) enabled, when using R CMD SHLIB. When I do make, which is

R CMD SHLIB -Wall -O2 cftp.c mcmc.c latticefn.c -lm

in this case, I get

faheem ~/research/cftp>make
R CMD SHLIB -Wall -O2 cftp.c mcmc.c latticefn.c -lm
make[1]: Entering directory `/home/faheem/research/cftp'
gcc -I/usr/lib/R/include  -I/usr/local/include -mieee-fp
-D__NO_MATH_INLINES  -fPIC  -g -c cftp.c -o cftp.o
gcc -shared  -o cftp.so cftp.o mcmc.o latticefn.o -L/usr/local/lib   
make[1]: Leaving directory `/home/faheem/research/cftp'
faheem ~/research/cftp>

it doesn't look like the arguments -O2 and -Wall get passed down. Is there
some reason for this? I certainly would like error checking to be turned
on as much as possible.

While we are on the topic, it looked like make is involved in invoking a
command like R CMD SHLIB -Wall -O2 cftp.c mcmc.c latticefn.c -lm. This is
presumably done using clever pattern rules and/or substitutions. I am
curious about how this is done. Can someone point to me to the appropriate
portion of the source code?

Thanks in advance for any help.

                       Sincerely, Faheem Mitha.

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