pngrewrite 1.4.0

- Upgrade to 1.4.0
- Switch to using the Makefile to fix build errors.
- Adjust the Makefile to use our `ENV.cc` and `ENV.cflags`

Closes #15483.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/Library/Formula/pngrewrite.rb b/Library/Formula/pngrewrite.rb
index d0a44cb52..40e76a1b6 100644
--- a/Library/Formula/pngrewrite.rb
+++ b/Library/Formula/pngrewrite.rb
@@ -1,14 +1,18 @@
 require 'formula'
 
 class Pngrewrite < Formula
-  url 'http://entropymine.com/jason/pngrewrite/pngrewrite-1.3.0.zip'
   homepage 'http://entropymine.com/jason/pngrewrite/'
-  sha1 '0a2a56c53e7b4cd0502c897092e859e92128d1bd'
+  url 'http://entropymine.com/jason/pngrewrite/pngrewrite-1.4.0.zip'
+  sha1 'c959fbd507d84c6d4544d09493934b268e969b56'
 
   depends_on :libpng
 
   def install
-    system "#{ENV.cc} #{ENV.cflags} #{ENV.cppflags} -o pngrewrite pngrewrite.c #{ENV.ldflags} -lpng"
+    inreplace 'Makefile' do |f|
+      f.gsub! 'gcc', ENV.cc
+      f.gsub! '-Wall -O2', ENV.cflags
+    end
+    system 'make'
     bin.install 'pngrewrite'
   end
 end