lcdproc: do not show the GPL on every start (#118772)

* lcdproc: do not show the GPL on every start

pkgs/servers/monitoring/lcdproc/default.nix

@@ -1,14 +1,27 @@
-{ lib, stdenv, fetchFromGitHub, autoreconfHook, makeWrapper, pkg-config
-, doxygen, freetype, libX11, libftdi, libusb-compat-0_1, libusb1, ncurses, perl }:
+{ lib
+, stdenv
+, fetchFromGitHub
+, autoreconfHook
+, makeWrapper
+, pkg-config
+, doxygen
+, freetype
+, libX11
+, libftdi
+, libusb-compat-0_1
+, libusb1
+, ncurses
+, perl
+}:
 
 stdenv.mkDerivation rec {
   pname = "lcdproc";
   version = "0.5.9";
 
   src = fetchFromGitHub {
-    owner  = "lcdproc";
-    repo   = "lcdproc";
-    rev    = "v${version}";
+    owner = "lcdproc";
+    repo = "lcdproc";
+    rev = "v${version}";
     sha256 = "1r885zv1gsh88j43x6fvzbdgfkh712a227d369h4fdcbnnfd0kpm";
   };
 
@@ -16,6 +29,12 @@ stdenv.mkDerivation rec {
     ./hardcode_mtab.patch
   ];
 
+  # we don't need to see the GPL every time we launch lcdd in the foreground
+  postPatch = ''
+    substituteInPlace server/main.c \
+      --replace 'output_GPL_notice();' '// output_GPL_notice();'
+  '';
+
   configureFlags = [
     "--enable-lcdproc-menus"
     "--enable-drivers=all"
@@ -23,6 +42,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = [ freetype libX11 libftdi libusb-compat-0_1 libusb1 ncurses ];
+
   nativeBuildInputs = [ autoreconfHook doxygen makeWrapper pkg-config ];
 
   # In 0.5.9: gcc: error: libbignum.a: No such file or directory
@@ -41,9 +61,9 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "Client/server suite for controlling a wide variety of LCD devices";
-    homepage    = "http://lcdproc.org/";
-    license     = licenses.gpl2;
+    homepage = "http://lcdproc.org/";
+    license = licenses.gpl2;
     maintainers = with maintainers; [ peterhoeg ];
-    platforms   = platforms.unix;
+    platforms = platforms.unix;
   };
 }