libdir = $(exec_prefix)/lib
libsubdir = $(libdir)/gcc-lib/$(target_alias)/$(gcc_version)
+# Multilib support variables.
+MULTISRCTOP =
+MULTIBUILDTOP =
+MULTIDIRS =
+MULTISUBDIR =
+MULTIDO = true
+MULTICLEAN = true
+
# Not configured per top-level version, since that doesn't get passed
# down at configure time, but overrridden by the top-level install
# target.
# List of variables to pass to sub-makes.
# Quote this way so that it can be used to set shell variables too.
-# Currently no use for PICFLAG, RUNTESTFLAGS -- check usage.
FLAGS_TO_PASS= \
CC='$(CC)' \
CFLAGS='$(CFLAGS)' \
CPPFLAGS='$(CPPFLAGS)' \
AR='$(AR)' \
- RANLIB='$(RANLIB)'
- PICFLAG='$(PICFLAG)' \
- RUNTESTFLAGS='$(RUNTESTFLAGS)'
+ RANLIB='$(RANLIB)' \
+ prefix='$(prefix)' \
+ exec_prefix='$(exec_prefix)' \
+ libdir='$(libdir)' \
+ libsubdir='$(libsubdir)' \
+ tooldir='$(tooldir)'
LIBG2C = libg2c.a
F2CEXT = abort derf derfc ef1asc ef1cmc erf erfc exit getarg getenv iargc \
signal system flush ftell fseek access besj0 besj1 besjn besy0 besy1 \
- besyn chdir chmod ctime date dbesj0 dbesj1 dbesjn dbesy0 dbesy1 dbesyn \
+ besyn chdir chmod ctime dbesj0 dbesj1 dbesjn dbesy0 dbesy1 dbesyn \
dtime etime fdate fgetc fget flush1 fnum fputc fput fstat gerror \
getcwd getgid getlog getpid getuid gmtime hostnm idate ierrno irand \
isatty itime kill link lnblnk lstat ltime mclock perror rand rename \
secnds second sleep srand stat symlnk time ttynam umask unlink \
- vxtidt vxttim alarm
-
-# These dependencies can be satisfied in parallel. They update stamp
-# files which the $(LIBG2C) target checks in the sub-make. (Probably
-# only one stamp file is really needed.)
-all: i77 f77 u77 e77
- make $(FLAGS_TO_PASS) $(LIBG2C)
+ vxttim alarm \
+ date_y2kbuggy date_y2kbug vxtidt_y2kbuggy vxtidt_y2kbug
+
+.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) $(LIBG2C)
i77 f77 u77: g2c.h
-$(LIBG2C): stamp-libi77 stamp-libf77 stamp-libu77 stamp-libe77
+# 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; \
for i in $(SUBDIRS); \
u77:
cd libU77; $(MAKE) $(FLAGS_TO_PASS) all
-stamp-libe77: $(srcdir)/f2cext.c
+s-libe77: f2cext.c
if [ -d libE77 ]; then rm -f libE77/*.o; else mkdir libE77; fi
for name in $(F2CEXT); \
do \
-o libE77/L$${name}.o; \
if [ $$? -eq 0 ] ; then true; else exit 1; fi; \
done
- echo timestamp >stamp-libe77
+ echo timestamp >s-libe77
-${srcdir}/configure: ${srcdir}/configure.in
+f2cext.c: g2c.h
+
+${srcdir}/configure: configure.in
rm -f config.cache
cd $(srcdir) && autoconf
# Dependence on Makefile serializes for parallel make.
-g2c.h: $(srcdir)/g2c.h.in config.status Makefile
+g2c.h: g2c.hin config.status Makefile
# Might try to avoid rebuilding everything if Makefile or configure
# changes and g2c.h doesn't; see also the Makefile rule. Should
# depend on another stamp file rather than using the commented-out
# lines below, since g2c.h isn't necessarily brought up to date.
# mv g2c.h g2c.x
$(SHELL) config.status
-# $(srcdir)/../move-if-change g2c.h g2c.x && mv g2c.x g2c.h
+# $(SHELL) $(srcdir)/../move-if-change g2c.h g2c.x && mv g2c.x g2c.h
-Makefile: $(srcdir)/Makefile.in config.status
-# Autoconf doc uses `./config.status'. Is there a good reason to use
+Makefile: Makefile.in config.status
+# Autoconf doc uses `./config.status'. Is there a good reason to use $(SHELL)?
$(SHELL) config.status
-config.status: $(srcdir)/configure $(gcc_version_trigger)
+config.status: configure $(gcc_version_trigger)
# Make sure we don't pick up a site config file and that configure
# gets run with correct values of variables such as CC.
CONFIG_SITE=no-such-file $(FLAGS_TO_PASS) \
cd libU77; $(MAKE) G77DIR=../../../gcc/ check
install: all
- $(INSTALL_DATA) $(LIBG2C) $(libsubdir)/$(LIBG2C).n
- ( cd $(libsubdir) ; $(RANLIB) $(LIBG2C).n )
- mv -f $(libsubdir)/$(LIBG2C).n $(libsubdir)/$(LIBG2C)
+ $(INSTALL_DATA) $(LIBG2C) $(libsubdir)/$(MULTISUBDIR)/$(LIBG2C).n
+ ( cd $(libsubdir)/$(MULTISUBDIR) ; $(RANLIB) $(LIBG2C).n )
+ mv -f $(libsubdir)/$(MULTISUBDIR)/$(LIBG2C).n $(libsubdir)/$(MULTISUBDIR)/$(LIBG2C)
$(INSTALL_DATA) g2c.h $(libsubdir)/include/g2c.h
@if [ -f f2c-install-ok -o -f $(srcdir)/f2c-install-ok ]; then \
echo ''; \
echo ' (To turn off this warning, delete the file'; \
echo ' f2c-install-ok in the source or build directory.)'; \
echo ''; \
- fi
+ else true; fi
+ $(MULTIDO) $(FLAGS_TO_PASS) multi-do DO="$@"
install-strip:
$(MAKE) INSTALL_PROGRAM='$(INSTALL_PROGRAM) -s' install
uninstall:
- rm -f $(libsubdir)/include/g2c.h $(libsubdir)/$(LIBG2C)
+ rm -f $(libsubdir)/$(MULTISUBDIR)/include/g2c.h $(libsubdir)/$(MULTISUBDIR)/$(LIBG2C)
+ $(MULTIDO) $(FLAGS_TO_PASS) multi-do DO="$@"
mostlyclean:
rm -f $(LIBG2C)
- for i in $(SUBDIRS); do (cd $$i && $(MAKE) mostlyclean); done
- rm -fr libE77
+ $(MAKE) DO=$@ DODIRS="$(SUBDIRS)" $(FLAGS_TO_PASS) subdir_do; \
+ $(MULTICLEAN) multi-clean DO=$@
+ rm -fr libE77 s-libe77
clean: mostlyclean
rm -f config.log
- for i in $(SUBDIRS); do (cd $$i && $(MAKE) clean); done
+ $(MAKE) DO=$@ DODIRS="$(SUBDIRS)" $(FLAGS_TO_PASS) subdir_do; \
+ $(MULTICLEAN) multi-clean DO=$@
distclean: clean
- rm -f Makefile config.cache config.status g2c.h stamp-libe77
- for i in $(SUBDIRS); do (cd $$i && $(MAKE) distclean); done
+ rm -f g2c.h s-libe77
+ $(MAKE) DO=$@ DODIRS="$(SUBDIRS)" $(FLAGS_TO_PASS) subdir_do; \
+ $(MULTICLEAN) multi-clean DO=distclean
+ rm -f config.cache config.status Makefile
maintainer-clean:
-rebuilt: ${srcdir}/configure
+rebuilt: configure
.PHONY: rebuilt mostlyclean clean distclean maintainer-clean all \
- i77 f77 u77 e77 check uninstall install-strip dist \
- installcheck installdirs
+ i77 f77 u77 check uninstall install-strip dist \
+ installcheck installdirs all-unilib
+
+subdir_do:
+ @rootpre=`pwd`/; export rootpre; \
+ srcrootpre=`cd $(srcdir); pwd`/; export srcrootpre; \
+ for i in .. $(DODIRS); do \
+ if [ x$$i != x.. ]; then \
+ if [ -f ./$$i/Makefile ]; then \
+ if (cd ./$$i; $(MAKE) $(FLAGS_TO_PASS) $(DO)); then \
+ true; \
+ else \
+ exit 1; \
+ fi; \
+ else true; fi; \
+ else true; fi; \
+ done
+
+# multidoings may be added here by configure.
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