{ stdenv, fetchurl, bison, m4 }: stdenv.mkDerivation rec { name = "flex-2.6.0"; src = fetchurl { url = "mirror://sourceforge/flex/${name}.tar.bz2"; sha256 = "1sdqx63yadindzafrq1w31ajblf9gl1c301g068s20s7bbpi3ri4"; }; buildInputs = [ bison ]; propagatedNativeBuildInputs = [ m4 ]; postConfigure = stdenv.lib.optionalString (stdenv.isDarwin || stdenv.isCygwin) '' sed -i Makefile -e 's/-no-undefined//;' ''; crossAttrs = { # disable tests which can't run on build machine postPatch = '' substituteInPlace Makefile.in --replace "tests" " "; ''; preConfigure = '' export ac_cv_func_malloc_0_nonnull=yes export ac_cv_func_realloc_0_nonnull=yes ''; }; meta = { homepage = http://flex.sourceforge.net/; description = "A fast lexical analyser generator"; }; }