1 files changed, 56 insertions, 0 deletions
diff --git a/util/alternatives/Make.mk b/util/alternatives/Make.mk
new file mode 100644
index 0000000..d5703e8
--- /dev/null
+++ b/util/alternatives/Make.mk
@@ -0,0 +1,56 @@
+#
+# Makefile fragment for the utility programs
+# 
+# THIS IS NOT A COMPLETE Makefile - run GNU make in the top-level
+# directory, and this will be pulled in automatically.
+#
+
+SUBDIRS += util
+
+###################
+#  RULES SECTION  #
+###################
+
+# how to make everything
+util:	$(BUILDDIR)/util/BuildImage $(BUILDDIR)/util/Offsets \
+	$(BUILDDIR)/util/mkblob $(BUILDDIR)/util/listblob
+
+#
+# Special rules for creating the utility programs.  These are required
+# because we don't want to use the same options as for the standalone
+# binaries - we want these to be compiled as "normal" programs.
+#
+
+$(BUILDDIR)/util/BuildImage:     util/BuildImage.c
+	@mkdir -p $(@D)
+	$(CC) -std=c99 -o $(BUILDDIR)/util/BuildImage util/BuildImage.c
+
+$(BUILDDIR)/util/mkblob:     util/mkblob.c
+	@mkdir -p $(@D)
+	$(CC) -std=c99 -o $(BUILDDIR)/util/mkblob util/mkblob.c
+
+$(BUILDDIR)/util/listblob:     util/listblob.c
+	@mkdir -p $(@D)
+	$(CC) -std=c99 -o $(BUILDDIR)/util/listblob util/listblob.c
+
+#
+# Offsets is compiled using -mx32 to force a 32-bit execution environment
+# for a program that runs under a 64-bit operating system.  This ensures
+# that pointers and long ints are 32 bits rather than 64 bits, which is
+# critical to correctly determining the size of types and byte offsets for
+# fields in structs. We also compile with "-fno-builtin" to avoid signature
+# clashes between declarations in our system and function declarations
+# built into the C compiler.
+#
+# If compiled with the CPP macro CREATE_HEADER_FILE defined, Offsets
+# accepts a command-line argument "-h". This causes it to write its
+# output as a standard C header file into a file named "include/offsets.h"
+# where it can be included into other source files (e.g., to provide
+# sizes of structs in C and assembly, or to provide byte offsets into
+# structures for use in assembly code).
+#
+
+$(BUILDDIR)/util/Offsets:        util/Offsets.c
+	@mkdir -p $(@D)
+	$(CC) -mx32 -std=c99 $(INCLUDES) -fno-builtin \
+		-o $(BUILDDIR)/util/Offsets util/Offsets.c