Improve 2020/kurdyukov2 for MacPorts build

The -I/-L options to the compiler/linker have been updated for those who
use MacPorts with the default MacPorts prefix.

2020/kurdyukov2/Makefile

@@ -61,7 +61,7 @@ CDEFINE=
 
 # Include files that are needed to compile
 #
-CINCLUDE= -I ${HOMEBREW_PREFIX}/include -I /usr/local/include
+CINCLUDE= -I ${HOMEBREW_PREFIX}/include -I /usr/local/include -I /opt/local/include
 
 # Optimization
 #
@@ -73,7 +73,7 @@ CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT}
 
 # Libraries needed to build
 #
-LIBS= -L ${HOMEBREW_PREFIX}/lib -L /usr/local/lib
+LIBS= -L ${HOMEBREW_PREFIX}/lib -L /usr/local/lib -L /opt/local/lib
 LIBJPEG= -ljpeg
 LIBPNG= -lpng
 

2020/kurdyukov2/README.md

@@ -76,7 +76,7 @@ make prog_ppm
 
 ### Building on macOS with MacPorts:
 
-- Thanks to Cody Boone Ferguson for this information!
+- Thanks to [Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) for this information!
 
 First, make sure you have the compiler tools installed e.g. by:
 

thanks-for-fixes.md

@@ -1212,3 +1212,10 @@ not sure why as it worked fine before on the same systems tested but `-O0`
 appears to fix the problem in both macOS and linux. Perhaps this is the problem
 that the author reported where it sometimes segfaults but Cody did not try
 debugging it yet.
+
+## [2020/kurdyukov2](2020/kurdyukov2/prog.c) ([README.md](2020/kurdyukov2/README.md))
+
+Cody added `-L`/`-I` paths to the Makefile to let this compile more easily if
+the user has installed the appropriate library with
+[MacPorts](https://www.macports.org) (with the default MacPorts prefix
+`/opt/local`).