utils-std

configure (4917B)

#!/bin/sh
# SPDX-FileCopyrightText: 2017 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
# SPDX-License-Identifier: MPL-2.0
target_filter='-e cmd/expr.tab'
usage() {
cat <<END
Usage: [variables] configure [variables]
Variables:
  PREFIX=DIR
  BINDIR=DIR
  SHELLDIR=DIR
  PERLDIR=DIR
  MANDIR=DIR
  MSGFMT=BIN
  CC=BIN
  YACC=BIN
  MAKE=BIN
  M4=BIN
  MANDOC=BIN
  GCOV=BIN
  CRAM=BIN
  REUSE=BIN
  CFLAGS=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 '%s\n ' cmd/*.c cmd/*.y | grep -v -F ${target_filter} | sed -e 's;\.c$;;' -e 's;\.y$;;' | tr -d '\n'
	echo
	printf 'MAN1SO = '
	printf '%s\n' cmd/*.1.in \
	| grep -v -F ${target_filter} \
	| sed -e 's;\.in$;;' -e 's;^cmd/;build/cmd/;' \
	| tr '\n' ' '
	echo
	printf 'MAN1 = ${MAN1SO} '
	printf '%s\n ' cmd/*.1 | grep -v -F ${target_filter} | tr -d '\n'
	echo
}
check_cmd() {
	var="$1"
	full_cmd="$2"
	# shellcheck disable=SC2086
	set -- $full_cmd
	cmd="$1"
	printf 'Checking $%s = %s command existance ...' "$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} ${CFLAGS} -Werror=implicit-function-declaration -c -o "${conftest}.bin" "${conftest}" 2>&1
	is_ok
	rm "${conftest}.bin"
}
check_cflag() {
	printf "checking whether compiler accepts %s... " "$@"
	${CC} ${CFLAGS} "$@" -c -o "configure.d/cflag_test.bin" "configure.d/cflag_test.c" 2>&1
	is_ok
	rm "configure.d/cflag_test.bin"
}
set -o pipefail
## User configuration
# defaults
PREFIX="${PREFIX:-/usr/local}"
MSGFMT="${MSGFMT:-msgfmt}"
CC="${CC:-cc}"
YACC="${YACC:-yacc}"
MAKE="${MAKE:-make}"
GCOV="${GCOV:-gcov}"
# -DDEBUG: Otherwise assert() does nothing, fine to be removed in production
CFLAGS="${CFLAGS:--g -O2 -DDEBUG}"
M4="${M4:-m4}"
MANDOC="${MANDOC:-mandoc}"
CRAM="${CRAM:-cram}"
REUSE="${REUSE:-reuse}"
# Also allow variables through arguments
for i; do
	case "$i" in
	-h|--help)
		usage
		exit 1
	;;
	-*)
		printf "Unknown argument ‘%s’\n" "${i}"
		usage
		exit 1
	;;
	*=*)
		# shellcheck disable=SC2163
		export "$i"
		shift
	;;
	*)
		printf "Unknown argument ‘%s’\n" "${i}"
		usage
		exit 1
	;;
	esac
done
# 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} ${EXTRA_CFLAGS}"
## System checks
# commands
check_cmd CC "$CC" || 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 "$CRAM"
	then
		:
	else
		CRAM="false"
		echo 'Notice: Testsuite depending on cram/psyk disabled'
	fi
fi
if ! check_cmd REUSE "$REUSE"
then
	echo 'Notice: Copyright linting depending on reuse disabled'
	REUSE="true"
fi
echo
check_cflag -Wwrite-strings && CFLAGS="${CFLAGS} -Wwrite-strings"
if ! check_header mntent.h; then
	echo 'Disabling cmd/df'
	target_filter="${target_filter} -e cmd/df"
fi
if ! check_header sys/sysmacros.h; then
	echo 'Disabling cmd/mknod'
	target_filter="${target_filter} -e cmd/mknod"
fi
check_conftest configure.d/splice.c && CFLAGS="${CFLAGS} -DHAS_SPLICE"
if check_conftest configure.d/copy_file_range.c
then
	CFLAGS="${CFLAGS} -DHAS_COPY_FILE_RANGE"
fi
if ! check_conftest configure.d/reallocarray.c; then
	echo 'Disabling cmd/tr cmd/cut'
	target_filter="${target_filter} -e cmd/tr. -e cmd/cut."
fi
check_conftest configure.d/getopt_long.c && CFLAGS="${CFLAGS} -DHAS_GETOPT_LONG"
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}
YACC = ${YACC}
MAKE = ${MAKE}
M4 = ${M4}
MANDOC = ${MANDOC}
MSGFMT = ${MSGFMT}
DBG = ${DBG}
GCOV = ${GCOV}
CRAM = ${CRAM}
REUSE = ${REUSE}
CFLAGS = ${CFLAGS}
LDFLAGS = ${LDFLAGS}
LDSTATIC = ${LDSTATIC}
EOF
is_ok
printf 'Adding targets to config.mk ...'
gen_targets >> config.mk ; or_die
echo
echo 'Done, you can now run make'