Thank you Simon, a little comment below On May 9, 2006, at 2:49 PM, Simon Urbanek wrote:
> On May 9, 2006, at 1:11 PM, Kasper Daniel Hansen wrote: > >> It is indeed the case that after updating to GCC 4 the package >> gets broken using -O2. I agree this needs to be fixed, but the error >> [...] >> unfortunately), but reading your comment about CPPFLAGS and >> CXXFLAGS makes me think I can indeed override it using the package >> Makevars file. The flags I was passing to the compiler were >> library locations anyway which was for the preprocessor. >> > > AFAIR you cannot override CPPFLAGS/CXXFLAGS in Makevars, because it > gets included first. You can, however, use something like this: > > all: $(SHLIB) > > MYCFLAGS=-O0 > > %.o: %.c > $(CC) $(ALL_CPPFLAGS) $(ALL_CFLAGS) $(MYCFLAGS) -c $< -o $@ > > for C, or for C++ accordingly: > > %.o: %.cc > $(CXX) $(ALL_CPPFLAGS) $(ALL_CXXFLAGS) $(MYCXXFLAGS) -c $< - > o $@ Actually you do not need the all: line, and since I use .cpp as C++ extension, all I needed was %.o: %.cpp <TAB>$(CXX) $(ALL_CPPFLAGS) -O0 -c $< -o $@ Note that I needed to delete the $(ALL_CXXFLAGS) which basically reads R's flags. Now, is there any way to (in the Makevars file) operate on $ (ALL_CXXFLAGS), since all I want is to delete any -O* flag? Or is defining rules and variables all I can do? Actually, where do I read about the Makevars syntax. Is it from autoconf (of which I only now the name). The section on it in R-exts is useful (hey, I managed to make one in the first place), but not comprehensive. /Kasper > However, don't ask me how portable this is ;). It exploits the fact > that old-style rules .c.o used by Makeconf are overridden by the > new-style rules regardless of their position. Nevertheless, you > could still use specific rules if desired without a full-blown > Makefile. (I always recommend the use of Makevars as far as > possible, because most writers of Makefiles get the shlib > compilation wrong). > > Cheers, > Simon ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
