X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?p=pintos-anon;a=blobdiff_plain;f=src%2FMakefile.userprog;h=0df391a24ed164db4fc6febe3d44c33443a30769;hp=3631cf1b221b2a3bf3e5e0fb02457338a39132db;hb=59f738d500f51ffc5f487344865b8bed69c26281;hpb=c4d3a0df42588f919931e786d398e418b6ce6179

diff --git a/src/Makefile.userprog b/src/Makefile.userprog
index 3631cf1..0df391a 100644
--- a/src/Makefile.userprog
+++ b/src/Makefile.userprog
@@ -3,7 +3,7 @@
 $(PROGS): CPPFLAGS += -I$(SRCDIR)/lib/user -I.
 
 # Linker flags.
-$(PROGS): LDFLAGS = -nostdlib -static -Wl,-T,$(LDSCRIPT)
+$(PROGS): LDFLAGS += -nostdlib -static -Wl,-T,$(LDSCRIPT)
 $(PROGS): LDSCRIPT = $(SRCDIR)/lib/user/user.lds
 
 # Library code shared between kernel and user programs.
@@ -12,7 +12,8 @@ lib_SRC += lib/random.c			# Pseudo-random numbers.
 lib_SRC += lib/stdio.c			# I/O library.
 lib_SRC += lib/stdlib.c			# Utility functions.
 lib_SRC += lib/string.c			# String functions.
-lib_SRC += lib/arithmetic.c
+lib_SRC += lib/arithmetic.c		# 64-bit arithmetic for GCC.
+lib_SRC += lib/ustar.c			# Unix standard tar format utilities.
 
 # User level only library code.
 lib/user_SRC  = lib/user/debug.c	# Debug helpers.