Dear Make People,
I first sent this to gnu.utils.help, then realised that a make mailing list was at least as suitable, plus I would probably get a faster answer. First, let me say that the version of make I am using is GNU Make 3.79.1-14 (in Debian Woody). My question is somewhat R specific (http://www.r-project.org/) but hopefully comprehensible even to someone who doesn't know anything about R. The command "R CMD SHLIB" is used to make shared libraries to load into R, which runs as an interpreted language. This essentially run make on a dynamically generated makefile. At least, that is my understanding. in the R FAQ (in the R Programming section) it says ********************************************************************** How can I change compilation flags? =================================== Suppose you have C code file for dynloading into R, but you want to use `R CMD SHLIB' with compilation flags other than the default ones (which were determined when R was built). You could change the file ``R_HOME'/etc/Makeconf' to reflect your preferences. If you are a Bourne shell user, you can also pass the desired flags to Make (which is used for controlling compilation) via the Make variable `MAKEFLAGS', as in MAKEFLAGS="CFLAGS=-O3" R CMD SHLIB *.c ********************************************************************** Now, something like MAKEFLAGS="CC=gcc-3.0" R CMD SHLIB rc.c -o rc.so works fine, and something like MAKEFLAGS="CC=gcc-3.0 PKG_CFLAGS= -Wall" R CMD SHLIB rc.c -o rc.so also works fine. However, MAKEFLAGS="CC=gcc-3.0 PKG_CFLAGS= -Wall -pedantic" R CMD SHLIB rc.c -o rc.so does not work fine. Make throws a fit and spews forth gibberish. My understanding of MAKEFLAGS is that it is for passing flags to some submake process, in this case R CMD SHLIB. The documentation (make manual) says that "Words in the value of `MAKEFLAGS' that contain `=', `make' treats as variable definitions just as if they appeared on the command line." However, there seems to be a problem when the variable definition contains blanks, as PKG_CFLAGS does above. Can anyone advise on what is the correct syntax for this? I tried various possibilities and none of them worked, and I cannot find any documentation that is helpful. Sincerely, Faheem Mitha. _______________________________________________ Help-make mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/help-make
