On 5 April 2017 at 15:46, Winston Chang wrote: | On Wed, Apr 5, 2017 at 2:24 PM, Robert McGehee <rmcge...@walleyetrading.net> | wrote: | | > Winston, | > I had a similar experience to you tracking down an insanely difficult bug | > in my R code that "disappeared" whenever slight changes were made to the | > script (e.g. like adding cat() statements). In my case, it coincided with | > my over-eager compilation of R and its library stack, as I was also | > experimenting with a cutting edge version of the gcc compiler as well as | > what I thought were innocuous performance enhancing CFLAGS like -O3/-Ofast | > -march=native. After downgrading gcc and recompiling everything (R and | > BLAS) without the extra flags, the problem went away. Not saying this is | > your problem, just sharing my similar experience. | > | > | Thanks Robert. I'm glad that I'm not the only one who's encountered an | issue like this. "Insanely difficult" is an apt description. :) | | I've been using the rocker/r-devel for testing. It compiles R with the | following CFLAGS: | -g -O2 -fdebug-prefix-map=/build/r-base-3.3.3=. -fstack-protector-strong | -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -g | It looks like it gets those settings from running R CMD config CFLAGS with | the already-installed version of R (3.3.3) which comes from a .deb package. | https://github.com/rocker-org/rocker/blob/master/r-devel/Dockerfile#L76
That's a Debian default a Policy-conforming offical package must use. For Docker you get these from the (prebuild) .deb package, you get it when you do r-devel by hand as they come back in via R CMD CONFIG: https://github.com/rocker-org/rocker/blob/master/r-devel/Dockerfile#L76-L77 You could undo those two lines / set CFLAGS and CXXFLAGS by hand. | I've also compiled R (again, in Docker) and tested with that, and gotten | the same results. It basically uses just `./configure | --without-recommended-packages` | and then `make`. Then these options should not come in. But are you saying that the Heisenbug behaviour happens irrespective of the compilation flags? Dirk -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
