d45d243749
Otherwise it would pick various -march flags based on the CPU of the
compiling system, using beautiful code like this:
````
63 AC_CACHE_CHECK(for x86 cpuid $1 output, ax_cv_gcc_x86_cpuid_$1,
64 [AC_RUN_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>], [
65 int op = $1, eax, ebx, ecx, edx;
66 FILE *f;
67 __asm__("cpuid"
68 : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
69 : "a" (op));
70 f = fopen("conftest_cpuid", "w"); if (!f) return 1;
71 fprintf(f, "%x:%x:%x:%x\n", eax, ebx, ecx, edx);
72 fclose(f);
73 return 0;
74 ])],
...
121 AC_CACHE_CHECK([whether avx is supported], [ax_cv_have_avx_ext],
122 [
123 ax_cv_have_avx_ext=no
124 if test "$((0x$ecx>>28&0x01))" = 1; then
125 ax_cv_have_avx_ext=yes
126 fi
127 ])
````
Nixpkgs is a collection of packages for the Nix package manager. It is periodically built and tested by the hydra build daemon as so-called channels. To get channel information via git, add nixpkgs-channels as a remote:
% git remote add channels git://github.com/NixOS/nixpkgs-channels.git
For stability and maximum binary package support, it is recommended to maintain
custom changes on top of one of the channels, e.g. nixos-16.03 for the latest
release and nixos-unstable for the latest successful build of master:
% git remote update channels
% git rebase channels/nixos-16.03
For pull-requests, please rebase onto nixpkgs master.
NixOS linux distribution source code is located inside
nixos/ folder.
- NixOS installation instructions
- Documentation (Nix Expression Language chapter)
- Manual (How to write packages for Nix)
- Manual (NixOS)
- Nix Wiki (deprecated, see milestone "Move the Wiki!")
- Continuous package builds for unstable/master
- Continuous package builds for 16.03 release
- Tests for unstable/master
- Tests for 16.03 release
Communication: