On 20 November 2008 at 15:25, Michael Braun wrote: | Hi. I am writing some code in C that I would like to link into R. | | My Makevars file is: | | PKG_CPPFLAGS=-I/usr/local/include | PKG_LIBS=-L/usr/local/lib -lgsl | PKG_CFLAGS = -Wall -O0 -g -p -pg | | The source file is core.c,. and I am compiling using R CMD SHLIB | core.c The output is | | gcc -arch x86_64 -O3 -g -p -std=gnu99 -I/Library/Frameworks/ | R.framework/Resources/include -I/Library/Frameworks/R.framework/ | Resources/include/x86_64 -I/usr/local/include -I/usr/local/include - | Wall -O0 -g -p -pg -fPIC -g -O2 -c core.c -o core.o | | gcc -arch x86_64 -O3 -g -p -std=gnu99 -dynamiclib -Wl,- | headerpad_max_install_names -undefined dynamic_lookup -single_module - | multiply_defined suppress -L/usr/local/lib -o core.so core.o -L/usr/ | local/lib -lgsl -F/Library/Frameworks/R.framework/.. -framework R - | Wl,-framework -Wl,CoreFoundation | | I am running R 2.7.1 on a Mac Pro (Intel-based) with OS X 10.5.5. | | My problem is that, for debugging purposes, I would like to turn off | compiler optimization (so gdb stops telling me that values are | temporarily unavailable due to optimizations). I thought I was doing | that by putting the -O0 flag in PKG_CFLAGS in the Makevars file. But | from the output, it looks like there is still some optimization going | on. I would also like to avoid writing a Make file from scratch, if | at all possible. | | I looked through the documentation and archives, and was unable to | find a solution to this. Can someone offer some assistance?
One way is to edit $RHOME/etc/Makeconf by hand and remove the settings left there from the build-time configuration. Another way is to not use R CMD SHLIB but to craft a simple Makefile, copying the same commands that R CMD SHLIB shows you, and editing what you want to change. I often to that for development. Hth, Dirk -- Three out of two people have difficulties with fractions. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
