nixpkgs/pkgs/development/tools/parsing/flex/2.5.35.nix

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{ stdenv, fetchurl, autoreconfHook, flex, bison, texinfo, help2man, m4 }:
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stdenv.mkDerivation rec {
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name = "flex-2.5.35";
src = fetchurl {
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url = https://github.com/westes/flex/archive/flex-2-5-35.tar.gz;
sha256 = "0wh06nix8bd4w1aq4k2fbbkdq5i30a9lxz3xczf3ff28yy0kfwzm";
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};
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nativeBuildInputs = [ flex bison texinfo help2man autoreconfHook ];
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propagatedBuildInputs = [ m4 ];
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crossAttrs = {
preConfigure = ''
export ac_cv_func_malloc_0_nonnull=yes
export ac_cv_func_realloc_0_nonnull=yes
'';
};
meta = {
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branch = "2.5.35";
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homepage = http://flex.sourceforge.net/;
description = "A fast lexical analyser generator";
platforms = stdenv.lib.platforms.unix;
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};
}