From 0ad5a24738e0f456a1f2c43e2381fe51f75fa0b8 Mon Sep 17 00:00:00 2001
From: Daniel Nagy <danielnagy@posteo.de>
Date: Mon, 15 May 2023 22:30:00 +0200
Subject: [PATCH] pngcheck: support cross compilation and install man page

---
 pkgs/tools/graphics/pngcheck/default.nix | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/pkgs/tools/graphics/pngcheck/default.nix b/pkgs/tools/graphics/pngcheck/default.nix
index cb415a2c53ef..a90881dad224 100644
--- a/pkgs/tools/graphics/pngcheck/default.nix
+++ b/pkgs/tools/graphics/pngcheck/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, zlib }:
+{ lib, stdenv, fetchurl, zlib, installShellFiles }:
 
 stdenv.mkDerivation rec {
   pname = "pngcheck";
@@ -11,22 +11,27 @@ stdenv.mkDerivation rec {
 
   hardeningDisable = [ "format" ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
-    substituteInPlace Makefile.unx --replace "gcc" "clang"
+  postPatch = ''
+    substituteInPlace $makefile \
+      --replace "gcc" "$CC"
   '';
 
   makefile = "Makefile.unx";
   makeFlags = [ "ZPATH=${zlib.static}/lib" ];
 
+  nativeBuildInputs = [ installShellFiles ];
+
   buildInputs = [ zlib ];
 
   installPhase = ''
-    mkdir -p $out/bin/
-    cp pngcheck $out/bin/pngcheck
+    runHook preInstall
+    install -Dm555 -t $out/bin/ pngcheck
+    installManPage $pname.1
+    runHook postInstall
   '';
 
   meta = with lib; {
-    homepage = "http://pmt.sourceforge.net/pngcrush";
+    homepage = "https://pmt.sourceforge.net/pngcrush";
     description = "Verifies the integrity of PNG, JNG and MNG files";
     license = licenses.free;
     platforms = platforms.unix;