109 lines
1.9 KiB
Bash
Executable file
109 lines
1.9 KiB
Bash
Executable file
#!/bin/sh
|
|
# SPDX-License-Identifier: BSD-3-Clause
|
|
# Copyright 2014-2015 6WIND S.A.
|
|
#
|
|
# Crude script to detect whether particular types, macros and functions are
|
|
# defined by trying to compile a file with a given header. Can be used to
|
|
# perform cross-platform checks since the resulting object file is not
|
|
# executed.
|
|
#
|
|
# Set VERBOSE=1 in the environment to display compiler output and errors.
|
|
#
|
|
# CC, CPPFLAGS, CFLAGS, EXTRA_CPPFLAGS and EXTRA_CFLAGS are taken from the
|
|
# environment.
|
|
#
|
|
# AUTO_CONFIG_CFLAGS may append additional CFLAGS without modifying the
|
|
# above variables.
|
|
|
|
file=${1:?output file name required (config.h)}
|
|
macro=${2:?output macro name required (HAVE_*)}
|
|
include=${3:?include name required (foo.h)}
|
|
type=${4:?object type required (define, enum, type, field, func)}
|
|
name=${5:?define/type/function name required}
|
|
|
|
: ${CC:=cc}
|
|
|
|
temp=/tmp/${0##*/}.$$.c
|
|
|
|
case $type in
|
|
define)
|
|
code="\
|
|
#ifndef $name
|
|
#error $name not defined
|
|
#endif
|
|
"
|
|
;;
|
|
enum)
|
|
code="\
|
|
long test____ = $name;
|
|
"
|
|
;;
|
|
type)
|
|
code="\
|
|
$name test____;
|
|
"
|
|
;;
|
|
field)
|
|
code="\
|
|
void test____(void)
|
|
{
|
|
${name%%.*} test_____;
|
|
|
|
(void)test_____.${name#*.};
|
|
}
|
|
"
|
|
;;
|
|
func)
|
|
code="\
|
|
void (*test____)() = (void (*)())$name;
|
|
"
|
|
;;
|
|
*)
|
|
unset error
|
|
: ${error:?unknown object type \"$type\"}
|
|
exit
|
|
esac
|
|
|
|
if [ "${VERBOSE}" = 1 ]
|
|
then
|
|
err=2
|
|
out=1
|
|
eol='
|
|
'
|
|
else
|
|
exec 3> /dev/null ||
|
|
exit
|
|
err=3
|
|
out=3
|
|
eol=' '
|
|
fi &&
|
|
printf 'Looking for %s %s in %s.%s' \
|
|
"${name}" "${type}" "${include}" "${eol}" &&
|
|
printf "\
|
|
#include <%s>
|
|
|
|
%s
|
|
" "$include" "$code" > "${temp}" &&
|
|
if ${CC} ${CPPFLAGS} ${EXTRA_CPPFLAGS} ${CFLAGS} ${EXTRA_CFLAGS} \
|
|
${AUTO_CONFIG_CFLAGS} \
|
|
-c -o ${temp}.o "${temp}" 1>&${out} 2>&${err}
|
|
then
|
|
rm -f "${temp}" "${temp}.o"
|
|
printf "\
|
|
#ifndef %s
|
|
#define %s 1
|
|
#endif /* %s */
|
|
|
|
" "${macro}" "${macro}" "${macro}" >> "${file}" &&
|
|
printf 'Defining %s.\n' "${macro}"
|
|
else
|
|
rm -f "${temp}" "${temp}.o"
|
|
printf "\
|
|
/* %s is not defined. */
|
|
|
|
" "${macro}" >> "${file}" &&
|
|
printf 'Not defining %s.\n' "${macro}"
|
|
fi
|
|
|
|
exit
|