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## automake - create Makefile.in from Makefile.am
## Copyright (C) 2012-2014 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/>.
##
## See if any _SOURCES or similar variable were misspelled, as in:
## bin_PROGRAMS = bar
## baz_SOURCES = main.c # Should be bar_SOURCES.
## FIXME: We should document the '.am/' namespace as reserved for automake
## FIXME: internals somewhere.
## FIXME: we should document the user-settable AM_FORCE_SANITY_CHECKS
## FIXME: variable, and its semantics.
# Running these checks unconditionally can be quite wasteful, especially
# for projects with lots of programs. So run them only when the values
# of the checked variables has possibly changed. For the moment, we assume
# this can only happen if the Makefile has been updated since the later
# check. And to give user more control, we also allow him to require these
# checks run unconditionally, by setting AM_FORCE_SANITY_CHECKS to "yes".
# The idiom we employ to implement our "lazy checking" relies on recursive
# make invocations and creation of an auxiliary makefile fragments, and
# such an approach do not interact very well with "make -n"; in such a case,
# it's simpler and safer to go for "greedy checking".
ifeq ($(am.make.dry-run),true)
AM_FORCE_SANITY_CHECKS ?= yes
endif
ifeq ($(AM_FORCE_SANITY_CHECKS),yes)
# Variables with these suffixes are candidates for typo checking.
.am/vartypos/suffixes := _SOURCES _LIBADD _LDADD _LDFLAGS _DEPENDENCIES
# But these variables are not, even if they match the patterns above.
.am/vartypos/whitelisted-vars := \
AM_LDFLAGS \
BUILT_SOURCES \
TAGS_DEPENDENCIES \
CONFIG_STATUS_DEPENDENCIES \
CONFIGURE_DEPENDENCIES
# The '*LOG_DEPENDENCIES' variables are used to declare extra dependencies
# for test cases, but only when the parallel testsuite harness is in use.
ifeq "$(am.conf.using-parallel-tests)" "yes"
# Extension-less tests are always accepted.
.am/vartypos/whitelisted-vars += LOG_DEPENDENCIES
# We expect '.ext' to be a valid tests extension iff 'EXT_LOG_DRIVER' is
# defined. Hence the following logic.
.am/vartypos/whitelisted-vars += \
$(patsubst %_LOG_DRIVER,%_LOG_DEPENDENCIES, \
$(filter %_LOG_DRIVER,$(.VARIABLES)))
endif
# Allow the user to add his own whitelist.
# FIXME: this is still undocumented!
.am/vartypos/whitelisted-vars += $(AM_VARTYPOS_WHITELIST)
# Canonicalized names of programs and libraries (vanilla or libtool) that
# have been declared.
.am/vartypos/known-canon-proglibs := \
$(sort $(call am.util.canon, $(am.all-progs) \
$(am.all-libs) \
$(am.all-ltlibs)))
# Extract 'foo' from something like "EXTRA_nodist_foo_SOURCES".
define .am/vartypos/canon-name-from-var
$(call am.util.strip-suffixes, $(.am/vartypos/suffixes), \
$(patsubst dist_%,%, \
$(patsubst nodist_%,%, \
$(patsubst nobase_%,%, \
$(patsubst EXTRA_%,%, \
$1)))))
endef
define .am/vartypos/check
$(eval $0/canon := $(call .am/vartypos/canon-name-from-var,$1))
$(if $(filter $($0/canon),$(.am/vartypos/known-canon-proglibs)),, \
$(call am.error,variable '$1' is defined but no program) \
$(call am.error, or library has '$($0/canon)' as canonical name))
endef
# The variables candidate for checking of typos.
.am/vartypos/candidate-vars := \
$(filter-out $(.am/vartypos/whitelisted-vars), \
$(filter $(addprefix %,$(.am/vartypos/suffixes)), \
$(.VARIABLES)))
# Apparently useless use of eval required to avoid a spurious "missing
# separator" error from GNU make.
$(eval $(foreach v,$(.am/vartypos/candidate-vars), \
$(call .am/vartypos/check,$v)))
else # $(AM_FORCE_SANITY_CHECKS) != yes
# We use "-include" rather than "include" to avoid getting, on the first
# make run in a clean tree, the following annoying warning:
# Makefile: .am/check-typos-stamp.mk: No such file or directory
# Although such a warning would *not* be an error in our setup, it still
# is ugly and annoying enough to justify ...
-include $(am.dir)/check-typos-stamp.mk
# ... this workaround; which is required by the fact that, if a recipe
# meant to rebuild a file included with "-include" file fails, the make
# run itself is not considered failed (this is quite consistent with
# the "-include" semantics).
ifdef .am/sanity-checks-failed
$(shell rm -f $(am.dir)/check-typos-stamp.mk)
$(error Some Automake-NG sanity checks failed)
else
$(am.dir)/check-typos-stamp.mk: $(am.relpath.makefile) | $(am.dir)
@if \
$(MAKE) --no-print-directory AM_FORCE_SANITY_CHECKS=yes .am/nil; \
then \
echo "# stamp" > $@; \
else \
echo ".am/sanity-checks-failed = yes" > $@; \
fi
endif
endif # $(AM_FORCE_SANITY_CHECKS) != yes
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