69 lines
1.2 KiB
Nix
69 lines
1.2 KiB
Nix
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{ stdenv, writeText, which, strace }:
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let
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hello_c = writeText "hello.c" ''
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#include <stdio.h>
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#include <limits.h>
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#include <xmmintrin.h>
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int main()
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{
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printf("Hello world!\n");
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return 0;
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}
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'';
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shuffle_c = writeText "shuffle.c" ''
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#include <stdio.h>
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typedef int v4si __attribute__ ((vector_size (16)));
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int main(void) {
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v4si a = {1,2,3,4};
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v4si b = {5,6,7,8};
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v4si mask1 = {0,1,1,3};
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v4si mask2 = {0,4,2,5};
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v4si res;
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#if defined(__GNUC__) && (__GNUC__ >= 7)
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res = __builtin_shuffle (a, mask1); /* res is {1,2,2,4} */
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res = __builtin_shuffle (a, b, mask2); /* res is {1,5,3,6} */
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printf("%d %d %d %d\n", res[0], res[1], res[2], res[3]);
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#endif
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return 0;
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}
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'';
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in
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stdenv.mkDerivation rec {
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version = "0.0.1";
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name = "hello-c";
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buildInputs = [ stdenv which strace ];
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src = hello_c;
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dontUnpack = true;
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dontConfigure = true;
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NIX_DEBUG = 0;
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buildPhase = ''
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set -x
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echo CC=$CC
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which $CC
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$CC -v
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cp ${hello_c} hello.c
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$CC -v hello.c -o hello
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./hello
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# Only gcc
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#cp ${shuffle_c} shuffle.c
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#$CC shuffle.c -o shuffle
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#./shuffle
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set +x
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'';
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installPhase = ''
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touch $out
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'';
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}
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