utils-std

configure (6613B)

#!/bin/sh
# SPDX-FileCopyrightText: 2017 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
# SPDX-License-Identifier: MPL-2.0
usage() {
cat <<END
Usage: [variables] configure [variables]
Variables:
  PREFIX=DIR
  BINDIR=DIR
  SHELLDIR=DIR
  PERLDIR=DIR
  MANDIR=DIR
  CROSS_COMPILE=TRIPLE
  MSGFMT=BIN
  AR=BIN
  CC=BIN
  YACC=BIN
  MAKE=BIN
  M4=BIN
  MANDOC=BIN
  GCOV=BIN
  CRAM=BIN
  CFLAGS=OPTIONS
  ARFLAGS=OPTIONS
  LDFLAGS=OPTIONS
  LDSTATIC=OPTIONS
  EXTRA_CFLAGS=OPTIONS
Variables are set in the following order: Default, Environment, Arguments
Dependencies: See the README.md file
END
}
is_ok() {
	status="$?"
	if test $status -eq 0; then
		printf " OK\n"
	else
		printf " FAIL\n"
	fi
	return $status
}
or_die() {
	is_ok || exit 1
}
gen_targets() {
	printf 'EXE ='
	printf ' cmd/%s' ${commands}
	echo
	printf 'MAN1SO ='
	for cmd in ${commands}; do
		test -f "cmd/${cmd}.1.in" && printf ' %s' "build/cmd/${cmd}.1"
	done
	echo
	printf 'MAN1 = ${MAN1SO}'
	for cmd in ${commands}; do
		test -f "cmd/${cmd}.1.in" || printf ' %s' "cmd/${cmd}.1"
	done
	echo
	printf 'LIBUTILS_C = '
	echo libutils/*.c
	echo
	printf 'LIBUTILS_H = '
	echo libutils/*.h
	echo
}
cpp_define() {
	printf '#define %s\n' "$*" >> config.h
}
check_cmd() {
	var="$1"
	full_cmd="$2"
	# shellcheck disable=SC2086
	set -- $full_cmd
	cmd="$1"
	printf 'Checking $%s = %s command existence ...' "$var" "$full_cmd"
	command -v "$cmd" >/dev/null ; is_ok
}
check_header() {
	header="$1"
	set -- $CC -E -x c -
	printf 'Checking <%s> header (printf "#include <%s>" | %s) ...' "$header" "$header" "$*"
	printf '#include <%s>\n' "$header" | $@ >/dev/null
	is_ok
}
check_conftest() {
	conftest="$1"
	printf 'Checking if conftest %s compiles ...' "$conftest"
	${CC} ${CFLAGS} ${CFLAGS_CHECK} -o "${conftest}.bin" "${conftest}" ${LDFLAGS} ${LDSTATIC} 2>&1
	is_ok
}
check_cflag() {
	printf "checking whether compiler accepts %s... " "$@"
	${CC} ${CFLAGS} ${CFLAGS_CHECK} "$@" -c -o "configure.d/cflag_test.bin" "configure.d/cflag_test.c" 2>&1
	is_ok
}
add_commands() {
	echo "Adding commands: $*"
	commands="${commands} $*"
}
set -o pipefail
## User configuration
# defaults
PREFIX="${PREFIX:-/usr/local}"
MSGFMT="${MSGFMT:-msgfmt}"
YACC="${YACC:-yacc}"
MAKE="${MAKE:-make}"
CFLAGS="${CFLAGS:--g -O2}"
M4="${M4:-m4}"
MANDOC="${MANDOC:-mandoc}"
CRAM="${CRAM:-cram}"
# when there's 3+ commands starting with the same letter, put them on a new line
commands="
	arch base64 basename
	cat chmod chown chroot cksum cmp date dirname
	echo env expr false getconf head id install link logname
	mesg mkdir mkfifo mktemp mv
	nice nohup nproc
	paste pathchk printf pwd
	realpath renice rm rmdir
	seq sha1sum sha256sum sha512sum shuf sleep split strings sync
	tee test time timeout touch true truncate tty
	uname uniq unlink
	wc which whoami yes
"
# Also allow variables through arguments
for i; do
	case "$i" in
	-h|--help)
		usage
		exit 1
	;;
	-*)
		printf "Unknown argument ‘%s’\n" "${i}"
		usage
		exit 1
	;;
	[A-Z]*=*)
		# shellcheck disable=SC2163
		export "$i"
		shift
	;;
	*)
		printf "Unknown argument ‘%s’\n" "${i}"
		usage
		exit 1
	;;
	esac
done
printf 'Writing skeleton to config.h ...'
cat >config.h <<EOF
/* Autogenerated by ./configure */
#ifndef UTILS_STD_CONFIG_H
#define UTILS_STD_CONFIG_H
EOF
is_ok
# Fallback toolchain definitions, based on $CROSS_COMPILE
CC="${CC:-${CROSS_COMPILE}cc}"
AR="${AR:-${CROSS_COMPILE}ar}"
GCOV="${GCOV:-${CROSS_COMPILE}gcov}"
# Fallback definitions for dirs, based on $PREFIX
BINDIR="${BINDIR:-${PREFIX}/bin}"
SHELLDIR="${SHELLDIR:-${BINDIR}}"
PERLDIR="${PERLDIR:-${BINDIR}}"
MANDIR="${MANDIR:-${PREFIX}/share/man}"
# Add some extra CFLAGS
CFLAGS="${CFLAGS} ${EXTRA_CFLAGS}"
# Otherwise assert() can end up doing nothing, don't remove
CFLAGS="${CFLAGS} -DDEBUG -UNDEBUG"
## System checks
# commands
check_cmd CC "$CC" || exit 1
check_cmd AR "$AR" || exit 1
check_cmd YACC "$YACC" || exit 1
check_cmd MAKE "$MAKE" || exit 1
check_cmd M4 "$M4" || exit 1
if ! check_cmd GCOV "$GCOV"
then
	echo 'Notice: "coverage" target will fail'
	GCOV="false"
fi
if ! check_cmd MANDOC "$MANDOC"
then
	echo 'Notice: Linting depending on mandoc disabled'
	MANDOC="true"
fi
if ! check_cmd CRAM "$CRAM"
then
	echo "Notice: cram not found, trying prysk"
	CRAM="prysk"
	if check_cmd CRAM "$CRAM"
	then
		:
	else
		CRAM="false"
		echo 'Notice: Testsuite depending on cram/psyk disabled'
	fi
fi
echo
check_cflag "-Werror=implicit-function-declaration" && CFLAGS_CHECK="${CFLAGS_CHECK} -Werror=implicit-function-declaration"
# clang: -Werror=format-extra-args -Werror=format-insufficient-args
for f in -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wvla -Werror=format-extra-args -Werror=format-insufficient-args
do
	check_cflag "$f" && CFLAGS="${CFLAGS} $f"
done
echo
check_header mntent.h
has_mntent_h=$?
check_header sys/sysmacros.h && add_commands mknod
# As seen missing in Haiku beta5 <https://dev.haiku-os.org/ticket/16257>
check_header wordexp.h && cpp_define HAS_WORDEXP
check_conftest configure.d/sendfile_linux.c && cpp_define HAS_SENDFILE
check_conftest configure.d/copy_file_range.c && cpp_define HAS_COPY_FILE_RANGE
check_conftest configure.d/reallocarray.c
has_reallocarray=$?
test 0 -eq $has_reallocarray && add_commands tr cut
check_conftest configure.d/getopt_long.c && cpp_define HAS_GETOPT_LONG
check_conftest configure.d/syncfs.c && cpp_define HAS_SYNCFS
check_conftest configure.d/fgetln.c
has_fgetln=$?
check_conftest configure.d/mkstemps.c && cpp_define HAS_MKSTEMPS
check_conftest configure.d/mkdtemps.c && cpp_define HAS_MKDTEMPS
check_conftest configure.d/o_path.c && add_commands ln
# OpenBSD lacks posix_fadvise
check_conftest configure.d/posix_fadvise.c || cpp_define 'posix_fadvise(fd, off, len, adv) 0'
rm -f configure.d/*.bin
echo
if test 0 -eq $has_reallocarray; then
	test 0 -eq $has_mntent_h && add_commands df
	test 0 -eq $has_fgetln && add_commands join
fi
echo
## Configuration write
printf 'Writing to config.mk ...'
cat >config.mk <<EOF
# Autogenerated by ./configure
PREFIX   = ${PREFIX}
BINDIR   = ${BINDIR}
SHELLDIR = ${SHELLDIR}
PERLDIR  = ${PERLDIR}
MANDIR   = ${MANDIR}
CC = ${CC}
AR = ${AR}
YACC = ${YACC}
MAKE = ${MAKE}
M4 = ${M4}
MANDOC = ${MANDOC}
MSGFMT = ${MSGFMT}
DBG = ${DBG}
GCOV = ${GCOV}
CRAM = ${CRAM}
CFLAGS = ${CFLAGS}
ARFLAGS = ${ARFLAGS}
LDFLAGS = ${LDFLAGS}
LDSTATIC = ${LDSTATIC}
EOF
is_ok
printf 'Adding targets to config.mk ...'
gen_targets >> config.mk ; or_die
# Must close header guard
echo '#endif // UTILS_STD_CONFIG_H' >> config.h
echo
echo 'Done, you can now run make'