Improved makefile.

- Makefile now doesn't hardcode gcc. (Whether SilverMUD is compiler agnostic remains to be seen.)
- The first target is now all, which compiles a "release" build.
- General cleanup, removal of duplicate variables, and commenting.

Makefile

@@ -1,30 +1,38 @@
-CC = gcc
-clientsrc = $(wildcard src/*.c) \
-	    src/client/SilverMUDClient.c
-clientobj = $(clientsrc:.c=.o) 
-serversrc = $(wildcard src/*.c) \
-	    src/server/SilverMUDServer.c
-serverobj = $(serversrc:.c=.o)
+# Compiler and linker flags needed to link to the needed libraries:
 CFLAGS = `pkg-config --cflags guile-3.0`
-CLIENTLDFLAGS= -lpthread -lncurses -lgnutls `pkg-config --libs guile-3.0`
-SERVERLDFLAGS= -lpthread -lncurses -lgnutls `pkg-config --libs guile-3.0`
-SilverMUDClient: $(clientobj)
-	gcc  -o $@ $^ $(CLIENTLDFLAGS)
+LDFLAGS= -lpthread -lncurses -lgnutls `pkg-config --libs guile-3.0`
 
-SilverMUDServer: $(serverobj)
-	gcc  -o $@ $^ $(SERVERLDFLAGS)
+# Files needed to compile the client:
+clientsrc = $(wildcard src/*.c) src/client/SilverMUDClient.c
+clientobj = $(clientsrc:.c=.o)
 
-SilverMUDClientDebug: $(clientobj)
-	gcc -pg   $^ $(CLIENTLDFLAGS) -o $@
-
-SilverMUDServerDebug: $(serverobj)
-	gcc -pg   $^ $(SERVERLDFLAGS) -o $@
-
-.PHONY: clean
-clean:
-	rm -f $(clientobj) $(serverobj) SilverMUDClient SilverMUDServer SilverMUDClientDebug SilverMUDServerDebug
+# Files needed to compile the server:
+serversrc = $(wildcard src/*.c) src/server/SilverMUDServer.c
+serverobj = $(serversrc:.c=.o)
 
+# Default target: Compile the client and server with aggressive optimizations and a big stack of warnings:
 all: clean SilverMUDClient SilverMUDServer
 all: CFLAGS += -Wall -Wextra -Ofast
+
+# Debug target: Compile the client and server with profiling, debug information, debug optimization, and the
+# preprocessor flag "debug" set.
 debug: CFLAGS += -Wall -Wextra -pg -ggdb -Og -D debug
 debug: clean SilverMUDClientDebug SilverMUDServerDebug
+
+SilverMUDClient: $(clientobj)
+	cc $^ $(LDFLAGS) -o $@
+
+SilverMUDServer: $(serverobj)
+	cc $^ $(LDFLAGS) -o $@ 
+
+SilverMUDClientDebug: $(clientobj)
+	cc -pg $^ $(LDFLAGS) -o $@
+
+SilverMUDServerDebug: $(serverobj)
+	cc -pg $^ $(LDFLAGS) -o $@
+
+# Start from a clean slate:
+.PHONY: clean
+clean:
+	rm -f $(clientobj) $(serverobj) SilverMUDClient SilverMUDServer SilverMUDClientDebug SilverMUDServerDebug gmon.out
+