# utils/Makefile.in --- xscreensaver, Copyright (c) 1997 Jamie Zawinski.
# the `../configure' script generates `utils/Makefile' from this file.
+
+# The utilities in this directory are used mostly by the demos in ../hacks/.
+# The Makefile in that directory builds executables by simply referencing
+# the .o files in this directory.
+
+
+##############################################################################
+#
+# Some rambling about dynamic libraries follows, ignore it if you don't care
+# (which is almost assuredly the case.)
+#
+#
+# It would probably be sensible to just build a single .a file in this
+# directory, and link the hacks against that (statically.) I haven't done
+# that for two reasons: first, it works now, and why fix what ain't broke;
+# second, it wouldn't actually improve anything for the end user (it would
+# just make the Makefiles be a little smaller.)
+#
+# People sometimes suggest that the stuff in this directory should be in a
+# dynamic library, and that the hacks should be linked dynamically against
+# it. I haven't done this for a number of reasons:
+#
+# * First, the only thing that would improve would be disk space, in that
+# the executable files themselves would be smaller. That's it. Many other
+# things would get worse if we used a dynamic library:
+#
+# * Complication of installation procedures: suddenly, before any of the
+# hacks will work, you need to have a dynamic library installed, and
+# the system configured to use it. This is, basically, rocket science.
+# Most people don't know how to do this, it's a huge pain, and on many
+# systems, it requires root access.
+#
+# * Complication of the Makefile: every system builds dynamic libraries
+# differently. Every compiler takes different flags. I don't want to
+# do the hand-holding for the scores of Unix systems and compilers on
+# which people try to build this program.
+#
+# * Reduction of maintainability: gdb is remarkably bad at dealing with
+# debug info in dynamic libraries, and when debugging a hack, one would
+# constantly be fighting the linker and the debugger (or linking
+# statically when debugging.)
+#
+# * Version skew: when things are statically linked, it's perfectly ok to
+# make incompatible changes to the APIs defined in this directory, so long
+# as the current version in ../hacks/ is in sync. Much more care would
+# need to be taken with such things if dynamic libraries were involved,
+# to make sure that the major and minor versions of the library changed
+# at the appropriate time. This isn't too hard, but it's more work, and
+# yet another opportunity to screw up.
+#
+# * Runtime memory usage goes *up*. That's right, up! When a program
+# links in a dynamic library, the whole library is brought into the
+# address space, not just the files that are actually used. Normally,
+# this is ok, because if several programs are using (for example)
+# libX11.so, chances are that the savings outweighs the overhead. But
+# the nature of xscreensaver is that only one of the hacks ever runs at
+# a time -- so there would never be a second program using the utils/
+# dynamic library with which things could be shared.
+#
+# * Runtime speed decreases slightly, since dynamic code is marginally
+# slower. On modern machines, this probably doesn't make a perceptible
+# difference, however.
+#
+# So basically, I just don't think using libraries would be a win, and it would
+# definitely cause more of a maintenance and portability headache. However,
+# if someone else wants to do the work to make it be an option to configure,
+# and verifies that it works on several (more than three) different Unixes,
+# I'd be happy to take the patches.
+# -- jwz, 30-Jun-98
+#
+##############################################################################
+
+
@SET_MAKE@
.SUFFIXES:
.SUFFIXES: .c .o
X_CFLAGS = @X_CFLAGS@
-INCLUDES = -I$(srcdir) -I$(srcdir)/.. @INCLUDES@
+INCLUDES = -I$(srcdir) -I.. @INCLUDES@
SRCS = alpha.c colors.c fade.c grabscreen.c hsv.c overlay.c \
resources.c spline.c usleep.c visual.c xmu.c xroger.c \
-rm -f *.o a.out core
distclean: clean
- -rm -f Makefile *~ "#"*
+ -rm -f config.h Makefile *~ "#"*
# Adds all current dependencies to Makefile
depend:
( \
awk '/^# .*Makefile.in ---/,/^# DO .*distdepend/' < Makefile.in ; \
sed -e 's@ \./@ @g;s@ /[^ ]*@@g;/^.*:$$/d' \
- -e 's@ \([^$$]\)@ $$(srcdir)/\1@g' ; \
+ -e 's@ \([^$$]\)@ $$(srcdir)/\1@g' \
+ -e 's@ $$(srcdir)/\(.*config.h\)@ \1@g' ; \
echo '' \
) > /tmp/distdepend.$$$$ && \
mv Makefile.in Makefile.in.bak && \
# DO NOT DELETE: updated by make distdepend
alpha.o: $(srcdir)/utils.h
-alpha.o: $(srcdir)/../config.h
+alpha.o: ../config.h
alpha.o: $(srcdir)/alpha.h
alpha.o: $(srcdir)/hsv.h
alpha.o: $(srcdir)/yarandom.h
alpha.o: $(srcdir)/resources.h
colors.o: $(srcdir)/utils.h
-colors.o: $(srcdir)/../config.h
+colors.o: ../config.h
colors.o: $(srcdir)/hsv.h
colors.o: $(srcdir)/yarandom.h
colors.o: $(srcdir)/visual.h
colors.o: $(srcdir)/colors.h
fade.o: $(srcdir)/utils.h
-fade.o: $(srcdir)/../config.h
+fade.o: ../config.h
fade.o: $(srcdir)/visual.h
fade.o: $(srcdir)/usleep.h
fade.o: $(srcdir)/fade.h
grabscreen.o: $(srcdir)/utils.h
-grabscreen.o: $(srcdir)/../config.h
+grabscreen.o: ../config.h
grabscreen.o: $(srcdir)/yarandom.h
grabscreen.o: $(srcdir)/usleep.h
grabscreen.o: $(srcdir)/colors.h
grabscreen.o: $(srcdir)/resources.h
grabscreen.o: $(srcdir)/vroot.h
hsv.o: $(srcdir)/utils.h
-hsv.o: $(srcdir)/../config.h
+hsv.o: ../config.h
hsv.o: $(srcdir)/hsv.h
overlay.o: $(srcdir)/utils.h
-overlay.o: $(srcdir)/../config.h
+overlay.o: ../config.h
overlay.o: $(srcdir)/visual.h
resources.o: $(srcdir)/utils.h
-resources.o: $(srcdir)/../config.h
+resources.o: ../config.h
resources.o: $(srcdir)/resources.h
spline.o: $(srcdir)/utils.h
-spline.o: $(srcdir)/../config.h
+spline.o: ../config.h
spline.o: $(srcdir)/spline.h
-usleep.o: $(srcdir)/../config.h
+usleep.o: ../config.h
visual.o: $(srcdir)/utils.h
-visual.o: $(srcdir)/../config.h
+visual.o: ../config.h
visual.o: $(srcdir)/resources.h
visual.o: $(srcdir)/visual.h
-xmu.o: $(srcdir)/../config.h
+xmu.o: ../config.h
xroger.o: $(srcdir)/utils.h
-xroger.o: $(srcdir)/../config.h
-yarandom.o: $(srcdir)/../config.h
+xroger.o: ../config.h
+xroger.o: $(srcdir)/spline.h
+yarandom.o: ../config.h
yarandom.o: $(srcdir)/yarandom.h
erase.o: $(srcdir)/utils.h
-erase.o: $(srcdir)/../config.h
+erase.o: ../config.h
erase.o: $(srcdir)/yarandom.h
erase.o: $(srcdir)/usleep.h
erase.o: $(srcdir)/resources.h
sgivideo.o: $(srcdir)/utils.h
-sgivideo.o: $(srcdir)/../config.h
+sgivideo.o: ../config.h
sgivideo.o: $(srcdir)/sgivideo.h
sgivideo.o: $(srcdir)/resources.h
+sgivideo.o: $(srcdir)/visual.h
sgivideo.o: $(srcdir)/usleep.h
projects / xscreensaver / blobdiff