modified:   ch12/Makefile
 	new file:   ch12/README
 	new file:   ch12/common/Makefile
 	new file:   ch12/common/makethread.c
 	new file:   ch12/common/makethread.o
 	new file:   ch12/common/mkt.h
 	new file:   ch12/common/mkt.h.gch
 	new file:   ch12/free
 	new file:   ch12/free.c
 	new file:   ch12/getenv
 	new file:   ch12/getenv.c
 	new file:   ch12/getenv_c
 	new file:   ch12/getenv_c.c
 	new file:   ch12/getenv_r
 	new file:   ch12/getenv_r.c
 	new file:   ch12/getmutexattrtype
 	new file:   ch12/getmutexattrtype.c
 	new file:   ch12/libmkt.so
 	new file:   ch12/mkt.h
 	new file:   ch12/prog12_1
 	new file:   ch12/prog12_1.c
 	new file:   ch12/prog12_2
 	new file:   ch12/prog12_2.c
 	new file:   ch12/prog12_7
 	new file:   ch12/prog12_7.c
 	new file:   ch12/putenv_r
 	new file:   ch12/putenv_r.c
 	new file:   ch12/temp.foo