On Wed, 10 May 2017 20:57:36 +0100 [email protected] (akhiezer) wrote: >> From: Stephen Berman <[email protected]> >> Date: Wed, 10 May 2017 21:49:17 +0200 >> >> I want to build R (https://cran.r-project.org/) on (B)LFS 8.0 and one of >> its dependencies is a Fortran compiler. According to the BLFS book, >> adding Fortran to GCC requires a full recompilation, and this is done by >> bootstrapping, which "is needed for robustness and is highly recommended >> when upgrading the compilers [sic] version." I won't be upgrading, just >> adding Fortran, so will it save significant time to configure with >> --disable-bootstrap, or is that too risky? But the biggest time sink is >> the test suite: my LFS system is running on a not very fast single core >> CPU and the first full build of GCC with the tests took more than 10 >> hours (9 for the test suite). Since I will be recompiling the same >> version of GCC on the same hardware, but just adding Fortran, is it >> reasonable to skip the test suite this time, or is that too big a risk? >> > > > - excuse the partial, indirect answer, but: why not leave the > test-suite/&c to run overnight (or when you're sleeping, &c) ?
Yeah, I guess I could do that... > For a compiler, I wouldn't cut corners (or 'take shortcuts'): think > e.g. how much of your time/skills/resources/&c will go into _use_ > of the compiler; you don't want that wasted by a faulty compiler that > wasn't found-out to be faulty, 'cos tests/&c were skipped. My question is, since I already ran the test suite on the same version and same hardware, is it really cutting corners to skip it? That is, is there a significant risk that recompilation under almost the same conditions might fail? Of course, the difference is the addition of Fortran: is that enough to justify running the complete test suite again? I'm asking in all sincerity, because I've never recompiled GCC before. But maybe I should just let it run through the night... Steve Berman -- http://lists.linuxfromscratch.org/listinfo/blfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
