Giel van Schijndel <g...@mortis.eu> skribis: > On 04-05-18 14:43, Ludovic Courtès wrote: >> Hi, >> >> Giel van Schijndel <g...@mortis.eu> skribis: >> >>> On 09-03-18 13:42, Ludovic Courtès wrote: >>>> julien lepiller <jul...@lepiller.eu> skribis: >>>> >>>>> I'm trying to build a software that requires gcc>=7.2. Unfortunately, >>>>> the process crashes and ends with: >>>>> >>>>> /gnu/store/a4vwdk8r6p6l2mnffz4yaqlr1z6z6w3r-gcc-7.3.0/include/c++/cstdlib:75:15: >>>>> fatal error: stdlib.h: No such file or directory. >>>> On IRC Marius mentioned this bug report: >>>> >>>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70129#c3 >>>> >>>> Note that we use C_INCLUDE_PATH, which is equivalent to ‘-isystem’. >>> This is biting me too for a C++17 project I'm trying to build. >> Marius, do you have a link to the exact change in GCC that caused this >> regression? >> >> I find it hard to believe that a fix would necessarily “slow everything >> down”, as Jakub put it in the report above. >> >> Also it seems clear that in Guix we’ll want a solution that’s not >> CMake-specific. > > Obviously, I wasn't suggesting that. I was just suggesting a similar > approach. > >> Giel, does the patch below work for you? > > No, just by itself it doesn't. It does add 'CPATH', but doesn't drop > 'C_INCLUDE_PATH' and 'CPLUS_INCLUDE_PATH'. With this added to my package > preprocessing succeeds: > >> (add-before 'configure 'fixgcc7 >> (lambda _ >> (unsetenv "C_INCLUDE_PATH") >> (unsetenv "CPLUS_INCLUDE_PATH")))
I pushed the patch as a stop-gap measure in 91a56b4ab5e714e230c0088fb9f5ce0519efe1a0. Ludo’.
