secnds second sleep srand stat symlnk time ttynam umask unlink \
vxtidt vxttim alarm
-# These dependencies can be satisfied in parallel. The [fiu]77
-# targets update stamp files which the $(LIBG2C) target checks in the
-# sub-make. (Probably only one stamp file is really needed.)
-all: i77 f77 u77 s-libe77 $(LIBG2C)
- $(MULTIDO) $(FLAGS_TO_PASS) multi-do DO="all"
+.SUFFIXES:
+
+# The logic here is partly dictated by the desire to keep the lib?77
+# subdirs for compatibility with the Netlib version and because libU77
+# has a different copyright; then the libe77 bit (EXTERNALly-callable
+# versions) is funny. Given that, as well as keeping things as simple
+# as possible we want (at least) the following:
+# * Allow make to be run at the top level (all-target-libf2c), at this
+# level, or the subdirs of this level. In the latter case we only
+# compile, rather than updating libg2c.a;
+# * A robust set of dependencies, so that we rebuild (as little as
+# possible) if a configuration file, g2c.h or any lib?77/*.c file
+# changes;
+# * Avoid unnecessary running of ar and ranlib;
+# * Expose parallelism where reasonable, but not as a priority.
+
+# The intended top-level target here does a non-multilib build (via
+# the dependency) and then (perhaps) builds multilibs.
+
+all: all-unilib
+ $(MULTIDO) $(FLAGS_TO_PASS) multi-do DO="all-unilib"
+
+# `all-unilib' is the overall target in the absence of multilibs,
+# meant to be invoked via multi-do for multilibs.
+
+# Its dependencies can be satisfied in parallel. The [fiu]77 targets
+# update stamp files (see the subdir makefiles) which the $(LIBG2C)
+# target checks in the sub make to decide whether to run ar/ranlib.
+# (Probably only one stamp file is really needed.) The stamp files
+# s-lib[fiu]77 are intentionally not targets, since we're only meant
+# to come in at the level of this target. The [fiu]77 targets always
+# invoke sub makes to check dependencies in the subdirs, else we'd
+# have to maintain them at this level; we live with the overhead of
+# some recursive makes which may do nothing.
+
+all-unilib: i77 f77 u77 s-libe77
+ $(MAKE) $(FLAGS_TO_PASS) $(LIBG2C)
i77 f77 u77: g2c.h
+# This target should normally only get invoked via `all-unilib' --
+# after all's well in the subdirs -- actually to assemble the library.
+# The stamp file dependencies are just to check whether libg2c.a is
+# up-to-date (to avoid running ar regardless) -- the files should
+# always have been created by a successful `all-unilib'.
+
$(LIBG2C): s-libi77 s-libf77 s-libu77 s-libe77
rm -f $(LIBG2C)
set -e; \
# $(srcdir)/../move-if-change g2c.h g2c.x && mv g2c.x g2c.h
Makefile: Makefile.in config.status
-# Autoconf doc uses `./config.status'. Is there a good reason to use
+# Autoconf doc uses `./config.status'. Is there a good reason to use $(SHELL)?
$(SHELL) config.status
config.status: configure $(gcc_version_trigger)
.PHONY: rebuilt mostlyclean clean distclean maintainer-clean all \
i77 f77 u77 check uninstall install-strip dist \
- installcheck installdirs
+ installcheck installdirs all-unilib
subdir_do:
@rootpre=`pwd`/; export rootpre; \
else true; fi; \
done
+# multidoings may be added here by configure.