update CImg.h version to 179 to fix leaking file descriptors

fix PR#65 => westonplatter#65

ext/phashion_ext/extconf.rb

@@ -17,16 +17,19 @@
   if File.exist?("lib")
     puts "pHash already built; run 'rake clean' first if you need to rebuild."
   else
-    puts(cmd = "tar xzf #{BUNDLE} 2>&1")
+    puts(cmd = "tar -xzf #{BUNDLE} 2>&1")
     raise "'#{cmd}' failed" unless system(cmd)
 
     puts "patching pHash sources for PNG alpha channel support"
-    puts(cmd = "patch -d pHash-0.9.6 -p1 < patches/png_alpha.diff")
+    puts(cmd = "patch -d pHash-0.9.6 -p1 < #{File.join 'patches', 'png_alpha.diff'}")
     raise "'#{cmd}' failed" unless system(cmd)
 
     puts "updating config.{guess,sub} to support newer architectures"
-    FileUtils.cp_f 'patches/config.sub'  , BASEDIR
-    FileUtils.cp_f 'patches/config.guess', BASEDIR
+    FileUtils.mv File.join('patches', 'config.sub'  ), BUNDLE_PATH, force: true
+    FileUtils.mv File.join('patches', 'config.guess'), BUNDLE_PATH, force: true
+
+    puts "updating CImg header version"
+    FileUtils.mv 'patches/CImg.h', BUNDLE_PATH, force: true
 
     Dir.chdir(BUNDLE_PATH) do
       puts(cmd = "env CXXFLAGS='#{$CXXFLAGS}' CFLAGS='#{$CFLAGS}' LDFLAGS='#{$LDFLAGS}' ./configure --prefix=#{BASEDIR} --disable-audio-hash --disable-video-hash --disable-shared --with-pic 2>&1")
@@ -38,16 +41,15 @@
       puts(cmd = "make install || true 2>&1")
       raise "'#{cmd}' failed" unless system(cmd)
 
-      puts(cmd = "mv CImg.h ../include 2>&1")
-      raise "'#{cmd}' failed" unless system(cmd)
+      FileUtils.mv %w{ CImg.h pHash-config.h }, '../include', force: true
     end
 
-    system("rm -rf #{BUNDLE_PATH}") unless ENV['DEBUG'] or ENV['DEV']
+    FileUtils.rm_rf BUNDLE_PATH unless ENV['DEBUG'] or ENV['DEV']
   end
 
-  Dir.chdir("#{BASEDIR}/lib") do
-    system("cp -f libpHash.a  libpHash_gem.a")
-    system("cp -f libpHash.la libpHash_gem.la")
+  Dir.chdir('lib') do
+    FileUtils.mv 'libpHash.a' , 'libpHash_gem.a' , force: true
+    FileUtils.mv 'libpHash.la', 'libpHash_gem.la', force: true
   end # Dir.chdir /lib
 
   $LIBS = " -lpthread -lpHash_gem -lstdc++ -ljpeg -lpng -lm"