75 lines
2 KiB
Nix
75 lines
2 KiB
Nix
{
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lib,
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stdenv,
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buildPackages,
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fetchurl,
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bison,
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m4,
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autoreconfHook,
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help2man,
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}:
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# Avoid 'fetchpatch' to allow 'flex' to be used as a possible 'gcc'
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# dependency during bootstrap. Useful when gcc is built from snapshot
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# or from a git tree (flex lexers are not pre-generated there).
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stdenv.mkDerivation rec {
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pname = "flex";
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version = "2.6.4";
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src = fetchurl {
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url = "https://github.com/westes/flex/releases/download/v${version}/flex-${version}.tar.gz";
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sha256 = "15g9bv236nzi665p9ggqjlfn4dwck5835vf0bbw2cz7h5c1swyp8";
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};
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# Also upstream, will be part of 2.6.5
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# https://github.com/westes/flex/commit/24fd0551333e
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patches = [
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(fetchurl {
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name = "glibc-2.26.patch";
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url = "https://raw.githubusercontent.com/lede-project/source/0fb14a2b1ab2f82ce63f4437b062229d73d90516/tools/flex/patches/200-build-AC_USE_SYSTEM_EXTENSIONS-in-configure.ac.patch";
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sha256 = "0mpp41zdg17gx30kcpj83jl8hssks3adbks0qzbhcz882b9c083r";
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})
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];
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postPatch =
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''
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patchShebangs tests
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''
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+ lib.optionalString (stdenv.buildPlatform != stdenv.hostPlatform) ''
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substituteInPlace Makefile.in --replace "tests" " "
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substituteInPlace doc/Makefile.am --replace 'flex.1: $(top_srcdir)/configure.ac' 'flex.1: '
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'';
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depsBuildBuild = [ buildPackages.stdenv.cc ];
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nativeBuildInputs = [
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autoreconfHook
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help2man
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];
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buildInputs = [ bison ];
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propagatedBuildInputs = [ m4 ];
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preConfigure = lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
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export ac_cv_func_malloc_0_nonnull=yes
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export ac_cv_func_realloc_0_nonnull=yes
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'';
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postConfigure = lib.optionalString (stdenv.isDarwin || stdenv.isCygwin) ''
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sed -i Makefile -e 's/-no-undefined//;'
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'';
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dontDisableStatic = stdenv.buildPlatform != stdenv.hostPlatform;
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postInstall = ''
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ln -s $out/bin/flex $out/bin/lex
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'';
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meta = with lib; {
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homepage = "https://github.com/westes/flex";
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description = "A fast lexical analyser generator";
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license = licenses.bsd2;
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platforms = platforms.unix;
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};
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}
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