nixpkgs/pkgs/development/libraries/libftdi/default.nix
Austin Seipp 0339dc5fae libftdi: enable async mode
Apparently, async mode for libftdi 0.20 is allegedly disabled when using
libusb-compat wrappers, as libftdi does not really support libftdi 1.x. Because
we only ship libusb-compat, this would normally make async mode completely
unavailable.

Except distributions like Ubuntu just disable this check completely! See this
patch from Launchpad:

https://bazaar.launchpad.net/~ubuntu-branches/ubuntu/trusty/libftdi/trusty/view/head:/debian/patches/04_async_mode.diff

In the spirit of good competition (and feature parity for software that
*doesn't* support the synchronous mode, thanks to Ubuntu silently ensuring
their async-only paths work) we enable this just the same.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
2018-03-02 21:20:54 -06:00

33 lines
950 B
Nix

{stdenv, fetchurl, libusb}:
stdenv.mkDerivation rec {
name = "libftdi-0.20";
src = fetchurl {
url = "http://www.intra2net.com/en/developer/libftdi/download/${name}.tar.gz";
sha256 = "13l39f6k6gff30hsgh0wa2z422g9pyl91rh8a8zz6f34k2sxaxii";
};
buildInputs = [ libusb ];
propagatedBuildInputs = [ libusb ];
# Hack to avoid TMPDIR in RPATHs.
preFixup = ''rm -rf "$(pwd)" '';
configureFlags = [ "--with-async-mode" ];
# allow async mode. from ubuntu. see:
# https://bazaar.launchpad.net/~ubuntu-branches/ubuntu/trusty/libftdi/trusty/view/head:/debian/patches/04_async_mode.diff
patchPhase = ''
substituteInPlace ./src/ftdi.c \
--replace "ifdef USB_CLASS_PTP" "if 0"
'';
meta = {
description = "A library to talk to FTDI chips using libusb";
homepage = https://www.intra2net.com/en/developer/libftdi/;
license = stdenv.lib.licenses.lgpl21;
platforms = stdenv.lib.platforms.unix;
};
}