/
maint.mk
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/
maint.mk
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# -*-Makefile-*-
# This Makefile fragment tries to be general-purpose enough to be
# used by many projects via the gnulib maintainer-makefile module.
## Copyright (C) 2001-2022 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 3 of the License, 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 <https://www.gnu.org/licenses/>.
# This is reported not to work with make-3.79.1
# ME := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
ME := maint.mk
# These variables ought to be defined through the configure.ac section
# of the module description. But some packages import this file directly,
# ignoring the module description.
AWK ?= awk
GREP ?= grep
SED ?= sed
# Helper variables.
_empty =
_sp = $(_empty) $(_empty)
# _equal,S1,S2
# ------------
# If S1 == S2, return S1, otherwise the empty string.
_equal = $(and $(findstring $(1),$(2)),$(findstring $(2),$(1)))
# member-check,VARIABLE,VALID-VALUES
# ----------------------------------
# Check that $(VARIABLE) is in the space-separated list of VALID-VALUES, and
# return it. Die otherwise.
member-check = \
$(strip \
$(if $($(1)), \
$(if $(findstring $(_sp),$($(1))), \
$(error invalid $(1): '$($(1))', expected $(2)), \
$(or $(findstring $(_sp)$($(1))$(_sp),$(_sp)$(2)$(_sp)), \
$(error invalid $(1): '$($(1))', expected $(2)))), \
$(error $(1) undefined)))
# Do not save the original name or timestamp in the .tar.gz file.
# Use --rsyncable if available.
gzip_rsyncable := \
$(shell gzip --help 2>/dev/null|$(GREP) rsyncable >/dev/null \
&& printf %s --rsyncable)
GZIP_ENV = '--no-name --best $(gzip_rsyncable)'
GIT = git
VC = $(GIT)
VC_LIST = $(srcdir)/$(_build-aux)/vc-list-files -C $(srcdir)
# You can override this variable in cfg.mk if your gnulib submodule lives
# in a different location.
gnulib_dir ?= $(shell if test -f $(srcdir)/gnulib/gnulib-tool; then \
echo $(srcdir)/gnulib; \
else \
echo ${GNULIB_SRCDIR}; \
fi)
# You can override this variable in cfg.mk to set your own regexp
# matching files to ignore.
VC_LIST_ALWAYS_EXCLUDE_REGEX ?= ^$$
# This is to preprocess robustly the output of $(VC_LIST), so that even
# when $(srcdir) is a pathological name like "....", the leading sed command
# removes only the intended prefix.
_dot_escaped_srcdir = $(subst .,\.,$(srcdir))
# Post-process $(VC_LIST) output, prepending $(srcdir)/, but only
# when $(srcdir) is not ".".
ifeq ($(srcdir),.)
_prepend_srcdir_prefix =
else
_prepend_srcdir_prefix = | $(SED) 's|^|$(srcdir)/|'
endif
# In order to be able to consistently filter "."-relative names,
# (i.e., with no $(srcdir) prefix), this definition is careful to
# remove any $(srcdir) prefix, and to restore what it removes.
_sc_excl = \
$(or $(exclude_file_name_regexp--$@),^$$)
VC_LIST_EXCEPT = \
$(VC_LIST) | $(SED) 's|^$(_dot_escaped_srcdir)/||' \
| if test -f $(srcdir)/.x-$@; then $(GREP) -vEf $(srcdir)/.x-$@; \
else $(GREP) -Ev -e "$${VC_LIST_EXCEPT_DEFAULT-ChangeLog}"; fi \
| $(GREP) -Ev -e '($(VC_LIST_ALWAYS_EXCLUDE_REGEX)|$(_sc_excl))' \
$(_prepend_srcdir_prefix)
ifeq ($(origin prev_version_file), undefined)
prev_version_file = $(srcdir)/.prev-version
endif
PREV_VERSION := $(shell cat $(prev_version_file) 2>/dev/null)
VERSION_REGEXP = $(subst .,\.,$(VERSION))
PREV_VERSION_REGEXP = $(subst .,\.,$(PREV_VERSION))
ifeq ($(VC),$(GIT))
this-vc-tag = v$(VERSION)
this-vc-tag-regexp = v$(VERSION_REGEXP)
else
tag-package = $(shell echo "$(PACKAGE)" | tr '[:lower:]' '[:upper:]')
tag-this-version = $(subst .,_,$(VERSION))
this-vc-tag = $(tag-package)-$(tag-this-version)
this-vc-tag-regexp = $(this-vc-tag)
endif
my_distdir = $(PACKAGE)-$(VERSION)
# Old releases are stored here.
release_archive_dir ?= ../release
# If RELEASE_TYPE is undefined, but RELEASE is, use its second word.
# But overwrite VERSION.
ifdef RELEASE
VERSION := $(word 1, $(RELEASE))
RELEASE_TYPE ?= $(word 2, $(RELEASE))
endif
# Validate and return $(RELEASE_TYPE), or die.
RELEASE_TYPES = alpha beta stable
release-type = $(call member-check,RELEASE_TYPE,$(RELEASE_TYPES))
# Override gnu_rel_host and url_dir_list in cfg.mk if these are not right.
# Use alpha.gnu.org for alpha and beta releases.
# Use ftp.gnu.org for stable releases.
gnu_ftp_host-alpha = alpha.gnu.org
gnu_ftp_host-beta = alpha.gnu.org
gnu_ftp_host-stable = ftp.gnu.org
gnu_rel_host ?= $(gnu_ftp_host-$(release-type))
url_dir_list ?= $(if $(call _equal,$(gnu_rel_host),ftp.gnu.org), \
https://ftpmirror.gnu.org/$(PACKAGE), \
https://$(gnu_rel_host)/gnu/$(PACKAGE))
# Override this in cfg.mk if you are using a different format in your
# NEWS file.
today = $(shell date +%Y-%m-%d)
# Select which lines of NEWS are searched for $(news-check-regexp).
# This is a sed line number spec. The default says that we search
# lines 1..10 of NEWS for $(news-check-regexp).
# If you want to search only line 3 or only lines 20-22, use "3" or "20,22".
news-check-lines-spec ?= 1,10
news-check-regexp ?= '^\*.* $(VERSION_REGEXP) \($(today)\)'
# Prevent programs like 'sort' from considering distinct strings to be equal.
# Doing it here saves us from having to set LC_ALL elsewhere in this file.
export LC_ALL = C
## --------------- ##
## Sanity checks. ##
## --------------- ##
ifneq ($(_gl-Makefile),)
_cfg_mk := $(wildcard $(srcdir)/cfg.mk)
# Collect the names of rules starting with 'sc_'.
syntax-check-rules := $(sort $(shell env LC_ALL=C $(SED) -n \
's/^\(sc_[a-zA-Z0-9_-]*\):.*/\1/p' $(srcdir)/$(ME) $(_cfg_mk)))
.PHONY: $(syntax-check-rules)
ifeq ($(shell $(VC_LIST) >/dev/null 2>&1; echo $$?),0)
local-checks-available += $(syntax-check-rules)
else
local-checks-available += no-vc-detected
no-vc-detected:
@echo "No version control files detected; skipping syntax check"
endif
.PHONY: $(local-checks-available)
# Arrange to print the name of each syntax-checking rule just before running it.
$(syntax-check-rules): %: %.m
sc_m_rules_ = $(patsubst %, %.m, $(syntax-check-rules))
.PHONY: $(sc_m_rules_)
$(sc_m_rules_):
@echo $(patsubst sc_%.m, %, $@)
@date +%s.%N > .sc-start-$(basename $@)
# Compute and print the elapsed time for each syntax-check rule.
sc_z_rules_ = $(patsubst %, %.z, $(syntax-check-rules))
.PHONY: $(sc_z_rules_)
$(sc_z_rules_): %.z: %
@end=$$(date +%s.%N); \
start=$$(cat .sc-start-$*); \
rm -f .sc-start-$*; \
$(AWK) -v s=$$start -v e=$$end \
'END {printf "%.2f $(patsubst sc_%,%,$*)\n", e - s}' < /dev/null
# The patsubst here is to replace each sc_% rule with its sc_%.z wrapper
# that computes and prints elapsed time.
local-check := \
$(patsubst sc_%, sc_%.z, \
$(filter-out $(local-checks-to-skip), $(local-checks-available)))
syntax-check: $(local-check)
endif
# _sc_search_regexp
#
# This macro searches for a given construct in the selected files and
# then takes some action.
#
# Parameters (shell variables):
#
# prohibit | require
#
# Regular expression (ERE) denoting either a forbidden construct
# or a required construct. Those arguments are exclusive.
#
# exclude
#
# Regular expression (ERE) denoting lines to ignore that matched
# a prohibit construct. For example, this can be used to exclude
# comments that mention why the nearby code uses an alternative
# construct instead of the simpler prohibited construct.
#
# in_vc_files | in_files
#
# grep-E-style regexp selecting the files to check. For in_vc_files,
# the regexp is used to select matching files from the list of all
# version-controlled files; for in_files, it's from the names printed
# by "find $(srcdir)". When neither is specified, use all files that
# are under version control.
#
# containing | non_containing
#
# Select the files (non) containing strings matching this regexp.
# If both arguments are specified then CONTAINING takes
# precedence.
#
# with_grep_options
#
# Extra options for grep.
#
# ignore_case
#
# Ignore case.
#
# halt
#
# Message to display before to halting execution.
#
# Finally, you may exempt files based on an ERE matching file names.
# For example, to exempt from the sc_space_tab check all files with the
# .diff suffix, set this Make variable:
#
# exclude_file_name_regexp--sc_space_tab = \.diff$
#
# Note that while this functionality is mostly inherited via VC_LIST_EXCEPT,
# when filtering by name via in_files, we explicitly filter out matching
# names here as well.
# Initialize each, so that envvar settings cannot interfere.
export require =
export prohibit =
export exclude =
export in_vc_files =
export in_files =
export containing =
export non_containing =
export halt =
export with_grep_options =
# By default, _sc_search_regexp does not ignore case.
export ignore_case =
_ignore_case = $$(test -n "$$ignore_case" && printf %s -i || :)
define _sc_say_and_exit
dummy=; : so we do not need a semicolon before each use; \
{ printf '%s\n' "$(ME): $$msg" 1>&2; exit 1; };
endef
define _sc_search_regexp
dummy=; : so we do not need a semicolon before each use; \
\
: Check arguments; \
test -n "$$prohibit" && test -n "$$require" \
&& { msg='Cannot specify both prohibit and require' \
$(_sc_say_and_exit) } || :; \
test -z "$$prohibit" && test -z "$$require" \
&& { msg='Should specify either prohibit or require' \
$(_sc_say_and_exit) } || :; \
test -z "$$prohibit" && test -n "$$exclude" \
&& { msg='Use of exclude requires a prohibit pattern' \
$(_sc_say_and_exit) } || :; \
test -n "$$in_vc_files" && test -n "$$in_files" \
&& { msg='Cannot specify both in_vc_files and in_files' \
$(_sc_say_and_exit) } || :; \
test "x$$halt" != x \
|| { msg='halt not defined' $(_sc_say_and_exit) }; \
\
: Filter by file name; \
if test -n "$$in_files"; then \
files=$$(find $(srcdir) | $(GREP) -E "$$in_files" \
| $(GREP) -Ev '$(_sc_excl)'); \
else \
files=$$($(VC_LIST_EXCEPT)); \
if test -n "$$in_vc_files"; then \
files=$$(echo "$$files" | $(GREP) -E "$$in_vc_files"); \
fi; \
fi; \
\
: Filter by content; \
test -n "$$files" \
&& test -n "$$containing" \
&& { files=$$(echo "$$files" | xargs $(GREP) -l "$$containing"); } \
|| :; \
test -n "$$files" \
&& test -n "$$non_containing" \
&& { files=$$(echo "$$files" | xargs $(GREP) -vl "$$non_containing"); } \
|| :; \
\
: Check for the construct; \
if test -n "$$files"; then \
if test -n "$$prohibit"; then \
echo "$$files" \
| xargs $(GREP) $$with_grep_options $(_ignore_case) -nE \
"$$prohibit" /dev/null \
| $(GREP) -vE "$${exclude:-^$$}" \
&& { msg="$$halt" $(_sc_say_and_exit) } \
|| :; \
else \
echo "$$files" \
| xargs \
$(GREP) $$with_grep_options $(_ignore_case) -LE "$$require" \
| $(GREP) . \
&& { msg="$$halt" $(_sc_say_and_exit) } \
|| :; \
fi \
else :; \
fi || :;
endef
sc_avoid_if_before_free:
@$(VC_LIST_EXCEPT) \
| $(GREP) -v useless-if-before-free \
| xargs \
$(srcdir)/$(_build-aux)/useless-if-before-free \
$(useless_free_options) \
&& { printf '$(ME): found useless "if"' \
' before "free" above\n' 1>&2; \
exit 1; } \
|| :
sc_cast_of_argument_to_free:
@prohibit='\<free *\( *\(' halt="don't cast free argument" \
$(_sc_search_regexp)
sc_cast_of_x_alloc_return_value:
@prohibit='\*\) *x(m|c|re)alloc\>' \
halt="don't cast x*alloc return value" \
$(_sc_search_regexp)
sc_cast_of_alloca_return_value:
@prohibit='\*\) *alloca\>' \
halt="don't cast alloca return value" \
$(_sc_search_regexp)
sc_space_tab:
@prohibit='[ ] ' \
halt='found SPACE-TAB sequence; remove the SPACE' \
$(_sc_search_regexp)
# Don't use *scanf or the old ato* functions in "real" code.
# They provide no error checking mechanism.
# Instead, use strto* functions.
sc_prohibit_atoi_atof:
@prohibit='\<([fs]?scanf|ato([filq]|ll)) *\(' \
halt='do not use *scan''f, ato''f, ato''i, ato''l, ato''ll or ato''q' \
$(_sc_search_regexp)
# Use STREQ rather than comparing strcmp == 0, or != 0.
sp_ = strcmp *\(.+\)
sc_prohibit_strcmp:
@prohibit='! *strcmp *\(|\<$(sp_) *[!=]=|[!=]= *$(sp_)' \
exclude='# *define STRN?EQ\(' \
halt='replace strcmp calls above with STREQ/STRNEQ' \
$(_sc_search_regexp)
# Really. You don't want to use this function.
# It may fail to NUL-terminate the destination,
# and always NUL-pads out to the specified length.
sc_prohibit_strncpy:
@prohibit='\<strncpy *\(' \
halt='do not use strncpy, period' \
$(_sc_search_regexp)
# Pass EXIT_*, not number, to usage, exit, and error (when exiting)
# Convert all uses automatically, via these two commands:
# git grep -l '\<exit *(1)' \
# | grep -vEf .x-sc_prohibit_magic_number_exit \
# | xargs --no-run-if-empty \
# perl -pi -e 's/(^|[^.])\b(exit ?)\(1\)/$1$2(EXIT_FAILURE)/'
# git grep -l '\<exit *(0)' \
# | grep -vEf .x-sc_prohibit_magic_number_exit \
# | xargs --no-run-if-empty \
# perl -pi -e 's/(^|[^.])\b(exit ?)\(0\)/$1$2(EXIT_SUCCESS)/'
sc_prohibit_magic_number_exit:
@prohibit='(^|[^.])\<(usage|exit|error) ?\(-?[0-9]+[,)]' \
exclude='exit \(77\)|error ?\(((0|77),|[^,]*)' \
halt='use EXIT_* values rather than magic number' \
$(_sc_search_regexp)
# Check that we don't use $< in non-implicit Makefile rules.
#
# To find the Makefiles, trace AC_CONFIG_FILES. Using VC_LIST would
# miss the Makefiles that are not under VC control (e.g., symlinks
# installed for gettext). "Parsing" (recursive) uses of SUBDIRS seems
# too delicate.
#
# Use GNU Make's --print-data-base to normalize the rules into some
# easy to parse format: they are separated by two \n. Look for the
# "section" about non-pattern rules (marked with "# Files") inside
# which there are still the POSIX Make like implicit rules (".c.o").
sc_prohibit_gnu_make_extensions_awk_ = \
BEGIN { \
RS = "\n\n"; \
in_rules = 0; \
} \
/^\# Files/ { \
in_rules = 1; \
} \
/\$$</ && in_rules && $$0 !~ /^(.*\n)*\.\w+(\.\w+)?:/ { \
print "Error: " file ": $$< in a non implicit rule\n" $$0; \
status = 1; \
} \
END { \
exit status; \
}
sc_prohibit_gnu_make_extensions:
@if $(AWK) --version | grep GNU >/dev/null 2>&1; then \
(cd $(srcdir) && autoconf --trace AC_CONFIG_FILES:'$$1') | \
tr ' ' '\n' | \
$(SED) -ne '/Makefile/{s/\.in$$//;p;}' | \
while read m; do \
$(MAKE) -qp -f $$m .DUMMY-TARGET 2>/dev/null | \
$(AWK) -v file=$$m -e '$($@_awk_)' || exit 1; \
done; \
fi
# Using EXIT_SUCCESS as the first argument to error is misleading,
# since when that parameter is 0, error does not exit. Use '0' instead.
sc_error_exit_success:
@prohibit='error *\(EXIT_SUCCESS,' \
in_vc_files='\.[chly]$$' \
halt='found error (EXIT_SUCCESS' \
$(_sc_search_regexp)
# "FATAL:" should be fully upper-cased in error messages
# "WARNING:" should be fully upper-cased, or fully lower-cased
sc_error_message_warn_fatal:
@$(VC_LIST_EXCEPT) \
| xargs $(GREP) -nEA2 '[^rp]error *\(' /dev/null \
| $(GREP) -E '"Warning|"Fatal|"fatal' \
&& { echo '$(ME): use FATAL, WARNING or warning' 1>&2; \
exit 1; } \
|| :
# Error messages should not start with a capital letter
sc_error_message_uppercase:
@$(VC_LIST_EXCEPT) \
| xargs $(GREP) -nEA2 '[^rp]error *\(' /dev/null \
| $(GREP) -E '"[A-Z]' \
| $(GREP) -vE '"FATAL|"WARNING|"Java|"C#|"PRI' \
&& { echo '$(ME): found capitalized error message' 1>&2; \
exit 1; } \
|| :
# Error messages should not end with a period
sc_error_message_period:
@$(VC_LIST_EXCEPT) \
| xargs $(GREP) -nEA2 '[^rp]error *\(' /dev/null \
| $(GREP) -E '[^."]\."' \
&& { echo '$(ME): found error message ending in period' 1>&2; \
exit 1; } \
|| :
sc_file_system:
@prohibit=file''system \
exclude='/proc/filesystems' \
ignore_case=1 \
halt='found use of "file''system"; spell it "file system"' \
$(_sc_search_regexp)
# Don't use cpp tests of this symbol. All code assumes config.h is included.
sc_prohibit_have_config_h:
@prohibit='^# *if.*HAVE''_CONFIG_H' \
halt='found use of HAVE''_CONFIG_H; remove' \
$(_sc_search_regexp)
# Nearly all .c files must include <config.h>. However, we also permit this
# via inclusion of a package-specific header, if cfg.mk specified one.
# config_h_header must be suitable for grep -E.
config_h_header ?= <config\.h>
sc_require_config_h:
@require='^# *include $(config_h_header)' \
in_vc_files='\.c$$' \
halt='the above files do not include <config.h>' \
$(_sc_search_regexp)
# Print each file name for which the first #include does not match
# $(config_h_header). Like grep -m 1, this only looks at the first match.
perl_config_h_first_ = \
-e 'BEGIN {$$ret = 0}' \
-e 'if (/^\# *include\b/) {' \
-e ' if (not m{^\# *include $(config_h_header)}) {' \
-e ' print "$$ARGV\n";' \
-e ' $$ret = 1;' \
-e ' }' \
-e ' \# Move on to next file after first include' \
-e ' close ARGV;' \
-e '}' \
-e 'END {exit $$ret}'
# You must include <config.h> before including any other header file.
# This can possibly be via a package-specific header, if given by cfg.mk.
sc_require_config_h_first:
@if $(VC_LIST_EXCEPT) | $(GREP) '\.c$$' > /dev/null; then \
files=$$($(VC_LIST_EXCEPT) | $(GREP) '\.c$$') && \
perl -n $(perl_config_h_first_) $$files || \
{ echo '$(ME): the above files include some other header' \
'before <config.h>' 1>&2; exit 1; } || :; \
else :; \
fi
sc_prohibit_HAVE_MBRTOWC:
@prohibit='\bHAVE_MBRTOWC\b' \
halt="do not use $$prohibit; it is always defined" \
$(_sc_search_regexp)
# To use this "command" macro, you must first define two shell variables:
# h: the header name, with no enclosing <> or ""
# re: a regular expression that matches IFF something provided by $h is used.
define _sc_header_without_use
dummy=; : so we do not need a semicolon before each use; \
h_esc=`echo '[<"]'"$$h"'[">]'|$(SED) 's/\./\\\\./g'`; \
if $(VC_LIST_EXCEPT) | $(GREP) '\.c$$' > /dev/null; then \
files=$$($(GREP) -l '^# *include '"$$h_esc" \
$$($(VC_LIST_EXCEPT) | $(GREP) '\.c$$')) && \
$(GREP) -LE "$$re" $$files | $(GREP) . && \
{ echo "$(ME): the above files include $$h but don't use it" \
1>&2; exit 1; } || :; \
else :; \
fi
endef
# Prohibit the inclusion of assert.h without an actual use of assert.
sc_prohibit_assert_without_use:
@h='assert.h' re='\<assert *\(' $(_sc_header_without_use)
# Prohibit the inclusion of close-stream.h without an actual use.
sc_prohibit_close_stream_without_use:
@h='close-stream.h' re='\<close_stream *\(' $(_sc_header_without_use)
# Prohibit the inclusion of getopt.h without an actual use.
sc_prohibit_getopt_without_use:
@h='getopt.h' re='\<getopt(_long)? *\(' $(_sc_header_without_use)
# Don't include quotearg.h unless you use one of its functions.
sc_prohibit_quotearg_without_use:
@h='quotearg.h' re='\<quotearg(_[^ ]+)? *\(' $(_sc_header_without_use)
# Don't include quote.h unless you use one of its functions.
sc_prohibit_quote_without_use:
@h='quote.h' re='\<quote((_n)? *\(|_quoting_options\>)' \
$(_sc_header_without_use)
# Don't include this header unless you use one of its functions.
sc_prohibit_long_options_without_use:
@h='long-options.h' re='\<parse_(long_options|gnu_standard_options_only) *\(' \
$(_sc_header_without_use)
# Don't include this header unless you use one of its functions.
sc_prohibit_inttostr_without_use:
@h='inttostr.h' re='\<(off|[iu]max|uint)tostr *\(' \
$(_sc_header_without_use)
# Don't include this header unless you use one of its functions.
sc_prohibit_ignore_value_without_use:
@h='ignore-value.h' re='\<ignore_(value|ptr) *\(' \
$(_sc_header_without_use)
# Don't include this header unless you use one of its functions.
sc_prohibit_error_without_use:
@h='error.h' \
re='\<error(_at_line|_print_progname|_one_per_line|_message_count)? *\('\
$(_sc_header_without_use)
# Don't include xalloc.h unless you use one of its functions.
# Consider these symbols:
# perl -lne '/^# *define (\w+)\(/ and print $1' lib/xalloc.h|grep -v '^__';
# perl -lne '/^(?:extern )?(?:void|char) \*?(\w+) *\(/ and print $1' lib/xalloc.h
# Divide into two sets on case, and filter each through this:
# | sort | perl -MRegexp::Assemble -le \
# 'print Regexp::Assemble->new(file => "/dev/stdin")->as_string'|sed 's/\?://g'
# Note this was produced by the above:
# _xa1 = \
#x(((2n?)?re|c(har)?|n(re|m)|z)alloc|alloc_(oversized|die)|m(alloc|emdup)|strdup)
# But we can do better, in at least two ways:
# 1) take advantage of two "dup"-suffixed strings:
# x(((2n?)?re|c(har)?|n(re|m)|[mz])alloc|alloc_(oversized|die)|(mem|str)dup)
# 2) notice that "c(har)?|[mz]" is equivalent to the shorter and more readable
# "char|[cmz]"
# x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
_xa1 = x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup)
_xa2 = X([CZ]|N?M)ALLOC
sc_prohibit_xalloc_without_use:
@h='xalloc.h' \
re='\<($(_xa1)|$(_xa2)) *\('\
$(_sc_header_without_use)
# Extract function names:
# perl -lne '/^(?:extern )?(?:void|char|Hash_table) \*?(\w+) *\(/ and print $1' lib/hash.h
_hash_re = \
hash_(re(set_tuning|move)|xin(itialize|sert)|in(itialize|sert)|get_(firs|nex)t|print_statistics|(delet|fre)e|lookup|clear)
_hash_fn = \<($(_hash_re)) *\(
_hash_struct = (struct )?\<[Hh]ash_(table|tuning)\>
sc_prohibit_hash_without_use:
@h='hash.h' \
re='$(_hash_fn)|$(_hash_struct)'\
$(_sc_header_without_use)
sc_prohibit_cloexec_without_use:
@h='cloexec.h' re='\<(set_cloexec_flag|dup_cloexec) *\(' \
$(_sc_header_without_use)
sc_prohibit_posixver_without_use:
@h='posixver.h' re='\<posix2_version *\(' $(_sc_header_without_use)
sc_prohibit_same_without_use:
@h='same.h' re='\<same_name(at)? *\(' $(_sc_header_without_use)
sc_prohibit_hash_pjw_without_use:
@h='hash-pjw.h' \
re='\<hash_pjw\>' \
$(_sc_header_without_use)
sc_prohibit_safe_read_without_use:
@h='safe-read.h' re='(\<SAFE_READ_ERROR\>|\<safe_read *\()' \
$(_sc_header_without_use)
sc_prohibit_argmatch_without_use:
@h='argmatch.h' \
re='(\<(ARGMATCH_DEFINE_GROUP|ARRAY_CARDINALITY|X?ARGMATCH(|_TO_ARGUMENT|_VERIFY))\>|\<(invalid_arg|argmatch(_exit_fn|_(in)?valid)?) *\()' \
$(_sc_header_without_use)
sc_prohibit_canonicalize_without_use:
@h='canonicalize.h' \
re='CAN_(EXISTING|ALL_BUT_LAST|MISSING)|canonicalize_(mode_t|filename_mode|file_name)' \
$(_sc_header_without_use)
sc_prohibit_root_dev_ino_without_use:
@h='root-dev-ino.h' \
re='(\<ROOT_DEV_INO_(CHECK|WARN)\>|\<get_root_dev_ino *\()' \
$(_sc_header_without_use)
sc_prohibit_openat_without_use:
@h='openat.h' \
re='\<(openat_(permissive|needs_fchdir|(save|restore)_fail)|l?(stat|ch(own|mod))at|(euid)?accessat|(FCHMOD|FCHOWN|STAT)AT_INLINE)\>' \
$(_sc_header_without_use)
# Prohibit the inclusion of c-ctype.h without an actual use.
ctype_re = isalnum|isalpha|isascii|isblank|iscntrl|isdigit|isgraph|islower\
|isprint|ispunct|isspace|isupper|isxdigit|tolower|toupper
sc_prohibit_c_ctype_without_use:
@h='c-ctype.h' re='\<c_($(ctype_re)) *\(' \
$(_sc_header_without_use)
# The following list was generated by running:
# man signal.h|col -b|perl -ne '/bsd_signal.*;/.../sigwaitinfo.*;/ and print' \
# | perl -lne '/^\s+(?:int|void).*?(\w+).*/ and print $1' | fmt
_sig_functions = \
bsd_signal kill killpg pthread_kill pthread_sigmask raise sigaction \
sigaddset sigaltstack sigdelset sigemptyset sigfillset sighold sigignore \
siginterrupt sigismember signal sigpause sigpending sigprocmask sigqueue \
sigrelse sigset sigsuspend sigtimedwait sigwait sigwaitinfo
_sig_function_re = $(subst $(_sp),|,$(strip $(_sig_functions)))
# The following were extracted from "man signal.h" manually.
_sig_types_and_consts = \
MINSIGSTKSZ SA_NOCLDSTOP SA_NOCLDWAIT SA_NODEFER SA_ONSTACK \
SA_RESETHAND SA_RESTART SA_SIGINFO SIGEV_NONE SIGEV_SIGNAL \
SIGEV_THREAD SIGSTKSZ SIG_BLOCK SIG_SETMASK SIG_UNBLOCK SS_DISABLE \
SS_ONSTACK mcontext_t pid_t sig_atomic_t sigevent siginfo_t sigset_t \
sigstack sigval stack_t ucontext_t
# generated via this:
# perl -lne '/^#ifdef (SIG\w+)/ and print $1' lib/sig2str.c|sort -u|fmt -70
_sig_names = \
SIGABRT SIGALRM SIGALRM1 SIGBUS SIGCANCEL SIGCHLD SIGCLD SIGCONT \
SIGDANGER SIGDIL SIGEMT SIGFPE SIGFREEZE SIGGRANT SIGHUP SIGILL \
SIGINFO SIGINT SIGIO SIGIOT SIGKAP SIGKILL SIGKILLTHR SIGLOST SIGLWP \
SIGMIGRATE SIGMSG SIGPHONE SIGPIPE SIGPOLL SIGPRE SIGPROF SIGPWR \
SIGQUIT SIGRETRACT SIGSAK SIGSEGV SIGSOUND SIGSTKFLT SIGSTOP SIGSYS \
SIGTERM SIGTHAW SIGTRAP SIGTSTP SIGTTIN SIGTTOU SIGURG SIGUSR1 \
SIGUSR2 SIGVIRT SIGVTALRM SIGWAITING SIGWINCH SIGWIND SIGWINDOW \
SIGXCPU SIGXFSZ
_sig_syms_re = $(subst $(_sp),|,$(strip $(_sig_names) $(_sig_types_and_consts)))
# Prohibit the inclusion of signal.h without an actual use.
sc_prohibit_signal_without_use:
@h='signal.h' \
re='\<($(_sig_function_re)) *\(|\<($(_sig_syms_re))\>' \
$(_sc_header_without_use)
# Don't include stdio--.h unless you use one of its functions.
sc_prohibit_stdio--_without_use:
@h='stdio--.h' re='\<((f(re)?|p)open|tmpfile) *\(' \
$(_sc_header_without_use)
# Don't include stdio-safer.h unless you use one of its functions.
sc_prohibit_stdio-safer_without_use:
@h='stdio-safer.h' re='\<((f(re)?|p)open|tmpfile)_safer *\(' \
$(_sc_header_without_use)
# Prohibit the inclusion of strings.h without a sensible use.
# Using the likes of bcmp, bcopy, bzero, index or rindex is not sensible.
sc_prohibit_strings_without_use:
@h='strings.h' \
re='\<(strn?casecmp|ffs(ll)?)\>' \
$(_sc_header_without_use)
# Extract the raw list of symbol names with this:
gl_extract_define_simple = \
/^\# *define ([A-Z]\w+)\(/ and print $$1
# Filter out duplicates and convert to a space-separated list:
_intprops_names = \
$(shell f=$(gnulib_dir)/lib/intprops.h; \
perl -lne '$(gl_extract_define_simple)' $$f | sort -u | tr '\n' ' ')
# Remove trailing space and convert to a regular expression:
_intprops_syms_re = $(subst $(_sp),|,$(strip $(_intprops_names)))
# Prohibit the inclusion of intprops.h without an actual use.
sc_prohibit_intprops_without_use:
@h='intprops.h' \
re='\<($(_intprops_syms_re)) *\(' \
$(_sc_header_without_use)
_stddef_syms_re = NULL|offsetof|ptrdiff_t|size_t|wchar_t
# Prohibit the inclusion of stddef.h without an actual use.
sc_prohibit_stddef_without_use:
@h='stddef.h' \
re='\<($(_stddef_syms_re))\>' \
$(_sc_header_without_use)
_de1 = dirfd|(close|(fd)?open|read|rewind|seek|tell)dir(64)?(_r)?
_de2 = (versionsort|struct dirent|getdirentries|alphasort|scandir(at)?)(64)?
_de3 = MAXNAMLEN|DIR|ino_t|d_ino|d_fileno|d_namlen
_dirent_syms_re = $(_de1)|$(_de2)|$(_de3)
# Prohibit the inclusion of dirent.h without an actual use.
sc_prohibit_dirent_without_use:
@h='dirent.h' \
re='\<($(_dirent_syms_re))\>' \
$(_sc_header_without_use)
# Prohibit the inclusion of verify.h without an actual use.
sc_prohibit_verify_without_use:
@h='verify.h' \
re='\<(verify(true|expr)?|assume|static_assert) *\(' \
$(_sc_header_without_use)
# Don't include xfreopen.h unless you use one of its functions.
sc_prohibit_xfreopen_without_use:
@h='xfreopen.h' re='\<xfreopen *\(' $(_sc_header_without_use)
sc_obsolete_symbols:
@prohibit='\<(HAVE''_FCNTL_H|O''_NDELAY)\>' \
halt='do not use HAVE''_FCNTL_H or O'_NDELAY \
$(_sc_search_regexp)
# FIXME: warn about definitions of EXIT_FAILURE, EXIT_SUCCESS, STREQ
# Each nonempty ChangeLog line must start with a year number, or a TAB.
sc_changelog:
@prohibit='^[^12 ]' \
in_vc_files='^ChangeLog$$' \
halt='found unexpected prefix in a ChangeLog' \
$(_sc_search_regexp)
# Ensure that each .c file containing a "main" function also
# calls bindtextdomain.
sc_bindtextdomain:
@require='bindtextdomain *\(' \
in_vc_files='\.c$$' \
containing='\<main *(' \
halt='the above files do not call bindtextdomain' \
$(_sc_search_regexp)
# Require that the final line of each test-lib.sh-using test be this one:
# Exit $fail
# Note: this test requires GNU grep's --label= option.
Exit_witness_file ?= tests/test-lib.sh
Exit_base := $(notdir $(Exit_witness_file))
sc_require_test_exit_idiom:
@if test -f $(srcdir)/$(Exit_witness_file); then \
die=0; \
for i in $$($(GREP) -l -F 'srcdir/$(Exit_base)' \
$$($(VC_LIST) tests)); do \
tail -n1 $$i | $(GREP) '^Exit .' > /dev/null \
&& : || { die=1; echo $$i; } \
done; \
test $$die = 1 && \
{ echo 1>&2 '$(ME): the final line in each of the above is not:'; \
echo 1>&2 'Exit something'; \
exit 1; } || :; \
fi
sc_trailing_blank:
@prohibit='[ ]$$' \
halt='found trailing blank(s)' \
exclude='^Binary file .* matches$$' \
$(_sc_search_regexp)
# Match lines like the following, but where there is only one space
# between the options and the description:
# -D, --all-repeated[=delimit-method] print all duplicate lines\n
longopt_re = --[a-z][0-9A-Za-z-]*(\[?=[0-9A-Za-z-]*]?)?
sc_two_space_separator_in_usage:
@prohibit='^ *(-[A-Za-z],)? $(longopt_re) [^ ].*\\$$' \
halt='help2man requires at least two spaces between an option and its description'\
$(_sc_search_regexp)
# A regexp matching function names like "error" that may be used
# to emit translatable messages.
_gl_translatable_diag_func_re ?= error
# Look for diagnostics that aren't marked for translation.
# This won't find any for which error's format string is on a separate line.
sc_unmarked_diagnostics:
@prohibit='\<$(_gl_translatable_diag_func_re) *\([^"]*"[^"]*[a-z]{3}' \
exclude='(_|ngettext ?)\(' \
halt='found unmarked diagnostic(s)' \
$(_sc_search_regexp)
# Avoid useless parentheses like those in this example:
# #if defined (SYMBOL) || defined (SYM2)
sc_useless_cpp_parens:
@prohibit='^# *if .*defined *\(' \
halt='found useless parentheses in cpp directive' \
$(_sc_search_regexp)
# List headers for which HAVE_HEADER_H is always true, assuming you are
# using the appropriate gnulib module. CAUTION: for each "unnecessary"
# #if HAVE_HEADER_H that you remove, be sure that your project explicitly
# requires the gnulib module that guarantees the usability of that header.
gl_assured_headers_ = \
cd $(gnulib_dir)/lib && echo *.in.h|$(SED) 's/\.in\.h//g'
# Convert the list of names to upper case, and replace each space with "|".
az_ = abcdefghijklmnopqrstuvwxyz
AZ_ = ABCDEFGHIJKLMNOPQRSTUVWXYZ
gl_header_upper_case_or_ = \
$$($(gl_assured_headers_) \
| tr $(az_)/.- $(AZ_)___ \
| tr -s ' ' '|' \
)
sc_prohibit_always_true_header_tests:
@or=$(gl_header_upper_case_or_); \
re="HAVE_($$or)_H"; \
prohibit='\<'"$$re"'\>' \
halt=$$(printf '%s\n' \
'do not test the above HAVE_<header>_H symbol(s);' \
' with the corresponding gnulib module, they are always true') \
$(_sc_search_regexp)
sc_prohibit_defined_have_decl_tests:
@prohibit='(#[ ]*ifn?def|\<defined)\>[ (]+HAVE_DECL_' \
halt='HAVE_DECL macros are always defined' \
$(_sc_search_regexp)
# ==================================================================
gl_other_headers_ ?= \
intprops.h \
openat.h \
stat-macros.h
# Perl -lne code to extract "significant" cpp-defined symbols from a
# gnulib header file, eliminating a few common false-positives.
# The exempted names below are defined only conditionally in gnulib,
# and hence sometimes must/may be defined in application code.
gl_extract_significant_defines_ = \
/^\# *define ([^_ (][^ (]*)(\s*\(|\s+\w+)/\
&& $$2 !~ /(?:rpl_|_used_without_)/\
&& $$1 !~ /^(?:NSIG|ENODATA)$$/\
&& $$1 !~ /^(?:SA_RESETHAND|SA_RESTART)$$/\
and print $$1
# Create a list of regular expressions matching the names
# of macros that are guaranteed to be defined by parts of gnulib.
define def_sym_regex
gen_h=$(gl_generated_headers_); \
(cd $(gnulib_dir)/lib; \
for f in *.in.h $(gl_other_headers_); do \
test -f $$f \
&& perl -lne '$(gl_extract_significant_defines_)' $$f; \
done; \
) | sort -u \
| $(SED) 's/^/^ *# *(define|undef) */;s/$$/\\>/'
endef
# Don't define macros that we already get from gnulib header files.
sc_prohibit_always-defined_macros:
@if test -d $(gnulib_dir); then \
case $$(echo all: | $(GREP) -l -f - Makefile) in Makefile);; *) \
echo '$(ME): skipping $@: you lack GNU grep' 1>&2; exit 0;; \
esac; \
regex=$$($(def_sym_regex)); export regex; \
$(VC_LIST_EXCEPT) \
| xargs sh -c 'echo $$regex | $(GREP) -E -f - "$$@"' \
dummy /dev/null \
&& { printf '$(ME): define the above' \
' via some gnulib .h file\n' 1>&2; \
exit 1; } \
|| :; \
fi
# ==================================================================
# Prohibit checked in backup files.
sc_prohibit_backup_files:
@$(VC_LIST) | $(GREP) '~$$' && \
{ echo '$(ME): found version controlled backup file' 1>&2; \
exit 1; } || :
# Require the latest GPL.
sc_GPL_version:
@prohibit='either ''version [^3]' \
halt='GPL vN, N!=3' \
$(_sc_search_regexp)
# Require the latest GFDL. Two regexp, since some .texi files end up
# line wrapping between 'Free Documentation License,' and 'Version'.
_GFDL_regexp = (Free ''Documentation.*Version 1\.[^3]|Version 1\.[^3] or any)
sc_GFDL_version:
@prohibit='$(_GFDL_regexp)' \
halt='GFDL vN, N!=3' \
$(_sc_search_regexp)
# Don't use Texinfo's @acronym{}.
# https://lists.gnu.org/r/bug-gnulib/2010-03/msg00321.html
texinfo_suffix_re_ ?= \.(txi|texi(nfo)?)$$
sc_texinfo_acronym:
@prohibit='@acronym\{' \
in_vc_files='$(texinfo_suffix_re_)' \
halt='found use of Texinfo @acronym{}' \
$(_sc_search_regexp)
cvs_keywords = \
Author|Date|Header|Id|Name|Locker|Log|RCSfile|Revision|Source|State
sc_prohibit_cvs_keyword:
@prohibit='\$$($(cvs_keywords))\$$' \
halt='do not use CVS keyword expansion' \
$(_sc_search_regexp)
# This Perl code is slightly obfuscated. Not only is each "$" doubled
# because it's in a Makefile, but the $$c's are comments; we cannot
# use "#" due to the way the script ends up concatenated onto one line.
# It would be much more concise, and would produce better output (including
# counts) if written as:
# perl -ln -0777 -e '/\n(\n+)$/ and print "$ARGV: ".length $1' ...
# but that would be far less efficient, reading the entire contents
# of each file, rather than just the last two bytes of each.
# In addition, while the code below detects both blank lines and a missing
# newline at EOF, the above detects only the former.
#
# This is a perl script that is expected to be the single-quoted argument
# to a command-line "-le". The remaining arguments are file names.
# Print the name of each file that does not end in exactly one newline byte.
# I.e., warn if there are blank lines (2 or more newlines), or if the
# last byte is not a newline. However, currently we don't complain
# about any file that contains exactly one byte.
# Exit nonzero if at least one such file is found, otherwise, exit 0.
# Warn about, but otherwise ignore open failure. Ignore seek/read failure.
#
# Use this if you want to remove trailing empty lines from selected files:
# perl -pi -0777 -e 's/\n\n+$/\n/' files...
#
require_exactly_one_NL_at_EOF_ = \
foreach my $$f (@ARGV) \
{ \
open F, "<", $$f or (warn "failed to open $$f: $$!\n"), next; \
my $$p = sysseek (F, -2, 2); \
my $$c = "seek failure probably means file has < 2 bytes; ignore"; \
my $$last_two_bytes; \
defined $$p and $$p = sysread F, $$last_two_bytes, 2; \
close F; \
$$c = "ignore read failure"; \
$$p && ($$last_two_bytes eq "\n\n" \
|| substr ($$last_two_bytes,1) ne "\n") \
and (print $$f), $$fail=1; \
} \