On Tue, Aug 16, 2011 at 4:02 AM, Darren Cook <dar...@dcook.org> wrote: >> I just tried and could _not_ replicate it. I just uncommented my standard >> line with the flag in ~/.R/Makevars: >> >> CXXFLAGS= -std=c++0x -g -O3 -Wall -pipe -pedantic -Wno-variadic-macros > > Thanks Dirk. > I tried with your line and it works for me too. So I tried shortening it > and this works: > CXXFLAGS= -std=c++0x -g -O3 > > but this does not: > CXXFLAGS= -std=c++0x -g > > This also does not work: > CXXFLAGS= -std=c++0x -g -Wall -pipe -pedantic -Wno-variadic-macros > > And neither does this: > CXXFLAGS= -g -Wall -pipe -pedantic -Wno-variadic-macros > > I.e. c++0x was a red herring, and the lack of -O3 is the problem. It > works with -O3, -O2, -O1 and -Os, but fails to work with -O0. > > Very curious. I considered trying each of the individual optimization > flags [1], to narrow it down further, until I realized how many of them > there were. > > Darren > > [1]: http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html
We had an earlier instance of something like this. The RcppArmadillo package defines a struct containing the version information on Armadillo. For some reason it is not accessible and the link step fails with -O0. With optimization everything is fine. Most peculiar indeed. _______________________________________________ Rcpp-devel mailing list Rcpp-devel@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
