Simplify config.mk and update README for tcc

README

@@ -28,5 +28,7 @@ individual tools to ubase-box.
 Ideally you will  want to statically link ubase.   We highly recommend
 using musl-libc[2].
 
+ubase is known to compile with gcc and tcc.
+
 [1] http://git.suckless.org/sbase/
 [2] http://www.musl-libc.org/

config.mk

@@ -8,12 +8,6 @@ MANPREFIX = $(PREFIX)/share/man
 #CC = gcc
 #CC = musl-gcc
 LD = $(CC)
-CPPFLAGS = -D_BSD_SOURCE -D_GNU_SOURCE
-CFLAGS   = -g -std=c99 -Wall -Wextra $(CPPFLAGS)
-LDFLAGS  = -g -lcrypt
-
-#CC = tcc
-#LD = $(CC)
-#CPPFLAGS = -D_BSD_SOURCE -D_GNU_SOURCE
-#CFLAGS   = -Os -Wall $(CPPFLAGS)
-#LDFLAGS  = -lcrypt
+CPPFLAGS = -D_GNU_SOURCE
+CFLAGS   = -Os -Wall -Wextra $(CPPFLAGS)
+LDFLAGS  = -lcrypt