subdirs.am

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Author : Jim Meyering
Date : 2009-10-31 17:47:58
Hash : e58e5b45
Message : Don't let an envvar setting of "$fail" cause build failure. Without this change, in a project using an automake-generated Makefile, "make fail=anything" would fail inappropriately, due to the `test -z "$$fail"' at the end of this emitted rule: * lib/am/subdirs.am ($(RECURSIVE_TARGETS)): Initialize "fail=" to keep an envvar setting of that variable from causing unwarranted failure. ($(RECURSIVE_CLEAN_TARGETS)): Likewise. * tests/subdir10.test: New test. * tests/Makefile.am: Update. Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>

lib/am/subdirs.am

## automake - create Makefile.in from Makefile.am
## Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003,
## 2004, 2008, 2009 Free Software Foundation, Inc.

## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2, or (at your option)
## any later version.

## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.

## You should have received a copy of the GNU General Public License
## along with this program.  If not, see <http://www.gnu.org/licenses/>.

RECURSIVE_TARGETS += all-recursive check-recursive installcheck-recursive
RECURSIVE_CLEAN_TARGETS = mostlyclean-recursive clean-recursive	\
  distclean-recursive maintainer-clean-recursive
## All documented targets which invoke `make' recursively, or depend
## on targets that do so.
AM_RECURSIVE_TARGETS += $(RECURSIVE_TARGETS:-recursive=) \
  $(RECURSIVE_CLEAN_TARGETS:-recursive=)

.PHONY: $(RECURSIVE_TARGETS) $(RECURSIVE_CLEAN_TARGETS)
.MAKE: $(RECURSIVE_TARGETS) $(RECURSIVE_CLEAN_TARGETS)

# This directory's subdirectories are mostly independent; you can cd
# into them and run `make' without going through this Makefile.
# To change the values of `make' variables: instead of editing Makefiles,
# (1) if the variable is set in `config.status', edit `config.status'
#     (which will cause the Makefiles to be regenerated when you run `make');
# (2) otherwise, pass the desired values on the `make' command line.

$(RECURSIVE_TARGETS):
## Using $failcom allows "-k" to keep its natural meaning when running a
## recursive rule.
	@fail= failcom='exit 1'; \
	for f in x $$MAKEFLAGS; do \
	  case $$f in \
	    *=* | --[!k]*);; \
	    *k*) failcom='fail=yes';; \
	  esac; \
	done; \
	dot_seen=no; \
	target=`echo $@ | sed s/-recursive//`; \
	list='$(SUBDIRS)'; for subdir in $$list; do \
	  echo "Making $$target in $$subdir"; \
	  if test "$$subdir" = "."; then \
	    dot_seen=yes; \
	    local_target="$$target-am"; \
	  else \
	    local_target="$$target"; \
	  fi; \
	  ($(am__cd) $$subdir && $(MAKE) $(AM_MAKEFLAGS) $$local_target) \
	  || eval $$failcom; \
	done; \
	if test "$$dot_seen" = "no"; then \
	  $(MAKE) $(AM_MAKEFLAGS) "$$target-am" || exit 1; \
	fi; test -z "$$fail"


mostlyclean: mostlyclean-recursive
clean: clean-recursive
distclean: distclean-recursive
maintainer-clean: maintainer-clean-recursive

## We run all `clean' targets in reverse order.  Why?  It's an attempt
## to alleviate a problem that can happen when dependencies are
## enabled.  In this case, the .P file in one directory can depend on
## some automatically generated header in an earlier directory.  Since
## the dependencies are required before any target is examined, make
## bombs.
$(RECURSIVE_CLEAN_TARGETS):
## Using $failcom allows "-k" to keep its natural meaning when running a
## recursive rule.
	@fail= failcom='exit 1'; \
	for f in x $$MAKEFLAGS; do \
	  case $$f in \
	    *=* | --[!k]*);; \
	    *k*) failcom='fail=yes';; \
	  esac; \
	done; \
	dot_seen=no; \
## For distclean and maintainer-clean we make sure to use the full
## list of subdirectories.  We do this so that `configure; make
## distclean' really is a no-op, even if SUBDIRS is conditional.  For
## other clean targets this doesn't matter.
	case "$@" in \
	  distclean-* | maintainer-clean-*) list='$(DIST_SUBDIRS)' ;; \
	  *) list='$(SUBDIRS)' ;; \
	esac; \
	rev=''; for subdir in $$list; do \
	  if test "$$subdir" = "."; then :; else \
	    rev="$$subdir $$rev"; \
	  fi; \
	done; \
## Always do `.' last.
	rev="$$rev ."; \
	target=`echo $@ | sed s/-recursive//`; \
	for subdir in $$rev; do \
	  echo "Making $$target in $$subdir"; \
	  if test "$$subdir" = "."; then \
	    local_target="$$target-am"; \
	  else \
	    local_target="$$target"; \
	  fi; \
	  ($(am__cd) $$subdir && $(MAKE) $(AM_MAKEFLAGS) $$local_target) \
	  || eval $$failcom; \
	done && test -z "$$fail"

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kc3-lang/automake /lib/am/subdirs.am