Commit e5d1511d authored by Alyssa Ross's avatar Alyssa Ross
Browse files

lib.systems: allow specifying libc = null 

It makes sense to allow platform definitions to opt out of having libc
at all.  One use case would be targetting some obscure new Linux
target that doesn't have a libc implementation yet, and another is
UEFI, which is basically libc-less Windows.

Not having libc is not commonly specified in (GNU) triples (even
Linux's build system will just target either -gnu or -musl depending
on the platform), so instead, we use a separate attribute for it.
parent 3e0cb1ab

lib/systems/default.nix

+1 −0
Original line number Diff line number Diff line
@@ -50,6 +50,7 @@ rec { 
        else if final.isFreeBSD             then "fblibc"

        else if final.isNetBSD              then "nblibc"

        else if final.isAvr                 then "avrlibc"

        else if final.isGhcjs               then null

        else if final.isNone                then "newlib"

        # TODO(@Ericson2314) think more about other operating systems

        else                                     "native/impure";

pkgs/top-level/all-packages.nix

+2 −2
Original line number Diff line number Diff line
@@ -20400,7 +20400,8 @@ with pkgs; 
  libcCrossChooser = name:

    # libc is hackily often used from the previous stage. This `or`

    # hack fixes the hack, *sigh*.

    /**/ if name == "glibc" then targetPackages.glibcCross or glibcCross

    /**/ if name == null then null

    else if name == "glibc" then targetPackages.glibcCross or glibcCross

    else if name == "bionic" then targetPackages.bionic or bionic

    else if name == "uclibc" then targetPackages.uclibcCross or uclibcCross

    else if name == "avrlibc" then targetPackages.avrlibcCross or avrlibcCross
@@ -20419,7 +20420,6 @@ with pkgs; 
    else if name == "nblibc" then targetPackages.netbsdCross.libc or netbsdCross.libc

    else if name == "wasilibc" then targetPackages.wasilibc or wasilibc

    else if name == "relibc" then targetPackages.relibc or relibc

    else if stdenv.targetPlatform.isGhcjs then null

    else throw "Unknown libc ${name}";















  libcCross = assert stdenv.targetPlatform != stdenv.buildPlatform; libcCrossChooser stdenv.targetPlatform.libc;