2 files changed, 76 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/libraries/libgpiod/0001-Drop-AC_FUNC_MALLOC-and-_REALLOC-and-check-for-them-.patch b/nixpkgs/pkgs/development/libraries/libgpiod/0001-Drop-AC_FUNC_MALLOC-and-_REALLOC-and-check-for-them-.patch
new file mode 100644
index 000000000000..f2ee8e8d3d73
--- /dev/null
+++ b/nixpkgs/pkgs/development/libraries/libgpiod/0001-Drop-AC_FUNC_MALLOC-and-_REALLOC-and-check-for-them-.patch
@@ -0,0 +1,31 @@
+From 2cc80dc06ea42087788cf27b31821ffa99a22f89 Mon Sep 17 00:00:00 2001
+From: Johannes Lode <johannes.lode@dynainstruments.com>
+Date: Thu, 14 Nov 2019 10:44:00 +0100
+Subject: [PATCH] Drop AC_FUNC_MALLOC and _REALLOC and check for them as
+ regular functions.
+
+While cross-compiling there occurred "undefined reference to
+`rpl_malloc'", the suggested change fixes the problem.
+
+Tested for native X86_64 and armv7a-unknown-linux-gnueabihf.
+---
+ configure.ac | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index 008499d..b492dc4 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -81,7 +81,8 @@ AC_DEFUN([HEADER_NOT_FOUND_CXX],
+ 
+ # This is always checked (library needs this)
+ AC_HEADER_STDC
+-AC_FUNC_MALLOC
++# AC_FUNC_MALLOC -- does not work while cross-compiling
++AC_CHECK_FUNC([malloc realloc])
+ AC_CHECK_FUNC([ioctl], [], [FUNC_NOT_FOUND_LIB([ioctl])])
+ AC_CHECK_FUNC([asprintf], [], [FUNC_NOT_FOUND_LIB([asprintf])])
+ AC_CHECK_FUNC([scandir], [], [FUNC_NOT_FOUND_LIB([scandir])])
+-- 
+2.25.1
+
diff --git a/nixpkgs/pkgs/development/libraries/libgpiod/default.nix b/nixpkgs/pkgs/development/libraries/libgpiod/default.nix
new file mode 100644
index 000000000000..a3178e548048
--- /dev/null
+++ b/nixpkgs/pkgs/development/libraries/libgpiod/default.nix
@@ -0,0 +1,45 @@
+{ lib, stdenv, fetchurl, autoreconfHook, autoconf-archive, pkgconfig, kmod
+, enable-tools ? true
+, enablePython ? false, python3, ncurses }:
+
+stdenv.mkDerivation rec {
+  pname = "libgpiod";
+  version = "1.6.2";
+
+  src = fetchurl {
+    url = "https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/snapshot/libgpiod-${version}.tar.gz";
+    sha256 = "1k8mxkzvd6y9aawxghddrjkldzskhb6607qhbwjfl9f945ns87qa";
+  };
+
+  patches = [
+    # cross compiling fix
+    # https://github.com/brgl/libgpiod/pull/45
+    ./0001-Drop-AC_FUNC_MALLOC-and-_REALLOC-and-check-for-them-.patch
+  ];
+
+  buildInputs = [ kmod ] ++ lib.optionals enablePython [ python3 ncurses ];
+  nativeBuildInputs = [
+    autoconf-archive
+    pkgconfig
+    autoreconfHook
+  ];
+
+  configureFlags = [
+    "--enable-tools=${if enable-tools then "yes" else "no"}"
+    "--enable-bindings-cxx"
+    "--prefix=${placeholder "out"}"
+  ] ++ lib.optional enablePython "--enable-bindings-python";
+
+  meta = with lib; {
+    description = "C library and tools for interacting with the linux GPIO character device";
+    longDescription = ''
+      Since linux 4.8 the GPIO sysfs interface is deprecated. User space should use
+      the character device instead. This library encapsulates the ioctl calls and
+      data structures behind a straightforward API.
+    '';
+    homepage = "https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/about/";
+    license = licenses.lgpl2;
+    maintainers = [ maintainers.expipiplus1 ];
+    platforms = platforms.linux;
+  };
+}