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Blame sofort/cfgtest/cfgtest.sh

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# cfgtest.sh: sofort's config test framework,
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# for use from within a project's custom cfgdefs.sh.
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# in the common scenario, target-specific tests are preceded
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# by a single invocation of cfgtest_target_section, whereas
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# native (build) system tests are preceded by the invocation
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# of cfgtest_native_section.
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# cfgdefs fraework variables:
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# mb_cfgtest_cc:      the compiler used for the current test
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# mb_cfgtest_cflags:  the compiler flags used for the current test
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# mb_cfgtest_cfgtype: the type of the current test (target/native)
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# mb_cfgtest_makevar: the make variable affected by the current test
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# mb_cfgtest_headers: headers for ad-hoc inclusion with the current test
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cfgtest_newline()
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{
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	printf '\n' >> $mb_pwd/cfgdefs.mk
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}
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cfgtest_comment()
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{
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	mb_internal_str='#'
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	for mb_internal_arg ; do
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		mb_internal_str="$mb_internal_str $mb_internal_arg"
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	done
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	printf '%s\n' "$mb_internal_str" >> $mb_pwd/cfgdefs.mk
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}
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cfgtest_target_section()
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{
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	mb_cfgtest_cc=$(make -s -f "$mb_pwd/Makefile.tmp" .display-cc)
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	mb_cfgtest_cflags=$(make -s -f "$mb_pwd/Makefile.tmp" .display-cflags)
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	mb_cfgtest_cfgtype='target'
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	cfgtest_comment 'target-specific tests'
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}
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cfgtest_native_section()
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{
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	mb_cfgtest_cc="$mb_native_cc"
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	mb_cfgtest_cflags="$mb_native_cc_cflags"
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	mb_cfgtest_cfgtype='native'
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	cfgtest_comment 'native system tests'
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}
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cfgtest_makevar_append()
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{
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	mb_internal_str='+='
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	for mb_internal_arg ; do
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		if ! [ -z "$mb_internal_arg" ]; then
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			mb_internal_str="$mb_internal_str $mb_internal_arg"
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		fi
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	done
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	printf '%-24s%s\n' "$mb_cfgtest_makevar" "$mb_internal_str" \
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		>> $mb_pwd/cfgdefs.mk
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	unset cfgtest_internal_unit_test
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}
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cfgtest_cflags_append()
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{
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	if [ $mb_cfgtest_cfgtype = 'target' ]; then
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		mb_internal_makevar='CFLAGS_CONFIG'
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	else
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		mb_internal_makevar='NATIVE_CC_CFLAGS'
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	fi
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	mb_cfgtest_makevar_saved=$mb_cfgtest_makevar
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	mb_cfgtest_makevar=$mb_internal_makevar
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	cfgtest_makevar_append "$@"
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	mb_cfgtest_makevar=$mb_cfgtest_makevar_saved
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}
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cfgtest_ldflags_append()
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{
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	if [ $mb_cfgtest_cfgtype = 'target' ]; then
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		mb_internal_makevar='LDFLAGS_CONFIG'
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	else
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		mb_internal_makevar='NATIVE_CC_LDFLAGS'
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	fi
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	mb_cfgtest_makevar_saved=$mb_cfgtest_makevar
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	mb_cfgtest_makevar=$mb_internal_makevar
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	cfgtest_makevar_append "$@"
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	mb_cfgtest_makevar=$mb_cfgtest_makevar_saved
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}
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cfgtest_header_presence()
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{
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	$mb_cfgtest_cc -E -xc -             \
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			$mb_cfgtest_cflags  \
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			--include="$@"      \
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		< /dev/null                 \
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		> /dev/null 2>/dev/null     \
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	|| return
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	mb_internal_str=$(printf '%s%s' '-DHAVE_' "$@"    \
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			| sed -e 's/\./_/g' -e 's@/@_@g'  \
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			| tr "[:lower:]" "[:upper:]")
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	if [ -z ${cfgtest_internal_unit_test:-} ]; then
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		cfgtest_cflags_append "$mb_internal_str"
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	else
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		cfgtest_makevar_append "$mb_internal_str"
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	fi
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}
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cfgtest_header_absence()
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{
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	$mb_cfgtest_cc -E -xc -             \
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			$mb_cfgtest_cflags  \
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			--include="$@"      \
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		< /dev/null                 \
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		> /dev/null 2>/dev/null     \
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	&& return
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	mb_internal_str=$(printf '%s%s' '-DHAVE_NO_' "$@" \
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			| sed -e 's/\./_/g' -e 's@/@_@g'  \
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			| tr "[:lower:]" "[:upper:]")
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	if [ -z ${cfgtest_internal_unit_test:-} ]; then
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		cfgtest_cflags_append "$mb_internal_str"
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	else
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		cfgtest_makevar_append "$mb_internal_str"
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	fi
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}
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cfgtest_interface_presence()
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{
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	mb_internal_cflags=''
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	for mb_header in $mb_cfgtest_headers; do
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		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"
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	done
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	printf 'void * addr = &%;;' "$@"                  \
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			| $mb_cfgtest_cc -S -xc - -o -    \
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			  $mb_cfgtest_cflags              \
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			  $mb_internal_cflags             \
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                > /dev/null 2>/dev/null                   \
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	|| return 1
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	mb_internal_str=$(printf '%s%s' '-DHAVE_' "$@"  \
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			| sed -e 's/\./_/g'             \
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			| tr "[:lower:]" "[:upper:]")
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	if [ -z ${cfgtest_internal_unit_test:-} ]; then
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		cfgtest_cflags_append "$mb_internal_str"
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	else
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		cfgtest_makevar_append "$mb_internal_str"
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	fi
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	return 0
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}
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cfgtest_decl_presence()
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{
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	mb_internal_cflags=''
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	for mb_header in $mb_cfgtest_headers; do
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		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"
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	done
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	printf 'void * any = (void *)%s;' "$@"            \
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			| $mb_cfgtest_cc -S -xc - -o -    \
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			  $mb_cfgtest_cflags              \
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			  $mb_internal_cflags             \
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                > /dev/null 2>/dev/null                   \
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	|| return 1
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	# does the argument solely consist of the macro or enum member name?
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	mb_internal_str=$(printf '%s' "$@" | tr -d '[a-z][A-Z][0-9][_]')
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	if [ -n "$mb_internal_str" ]; then
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		return 0
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	fi
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	mb_internal_str=$(printf '%s%s' '-DHAVE_DECL_' "$@"  \
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			| sed -e 's/\./_/g'                  \
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			| tr "[:lower:]" "[:upper:]")
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	if [ -z ${cfgtest_internal_unit_test:-} ]; then
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		cfgtest_cflags_append "$mb_internal_str"
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	else
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		cfgtest_makevar_append "$mb_internal_str"
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	fi
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	return 0
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}
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cfgtest_type_size()
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{
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	mb_internal_cflags=''
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	mb_internal_size=''
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	mb_internal_test='char x[(sizeof(%s) == %s) ? 1 : -1];'
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	for mb_header in $mb_cfgtest_headers; do
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		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"
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	done
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	for mb_internal_guess in 8 4 2 1 16 32 64 128; do
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		if [ -z $mb_internal_size ]; then
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			mb_internal_type="$@"
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			mb_internal_str=$(printf "$mb_internal_test"    \
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				"$mb_internal_type"                     \
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				"$mb_internal_guess")
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			printf '%s' "$mb_internal_str"                  \
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					| $mb_cfgtest_cc -S -xc - -o -  \
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					  $mb_cfgtest_cflags            \
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					  $mb_internal_cflags           \
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				> /dev/null 2>/dev/null                 \
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			&& mb_internal_size=$mb_internal_guess
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		fi
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	done
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	# unrecognized type, or type size not within range
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	if [ -z $mb_internal_size ]; then
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		return 1
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	fi
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	# -DSIZEOF_TYPE=SIZE
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	mb_internal_str=$(printf '%s%s=%s' '-DSIZEOF_'        \
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				"$mb_internal_type"           \
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				"$mb_internal_size"           \
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			| sed -e 's/\ /_/g' -e 's/*/P/g'      \
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			| tr "[:lower:]" "[:upper:]")
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	if [ -z ${cfgtest_internal_unit_test:-} ]; then
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		cfgtest_cflags_append "$mb_internal_str"
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	else
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		cfgtest_makevar_append "$mb_internal_str"
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	fi
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	return 0
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}
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cfgtest_code_snippet()
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{
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	mb_internal_cflags=''
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	mb_internal_test="$@"
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	for mb_header in $mb_cfgtest_headers; do
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		mb_internal_cflags="$mb_internal_cflags --include=$mb_header"
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	done
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	printf '%s' "$mb_internal_test"                 \
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			| $mb_cfgtest_cc -S -xc - -o -  \
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			  $mb_cfgtest_cflags            \
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			  $mb_internal_cflags           \
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		> /dev/null 2>/dev/null                 \
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	|| return 1
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	return 0
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}
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cfgtest_library_presence()
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{
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	printf 'int main(void){return 0;}'                \
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			| $mb_cfgtest_cc -o a.out -xc -   \
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			  $mb_cfgtest_cflags              \
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			  $@                              \
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                > /dev/null 2>/dev/null                   \
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	|| return 1
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	rm -f a.out
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	return 0
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}
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cfgtest_unit_header_presence()
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{
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	cfgtest_internal_unit_test='unit_test'
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	cfgtest_header_presence "$@" || return 1
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	return 0
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}
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cfgtest_unit_header_absence()
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{
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	cfgtest_internal_unit_test='unit_test'
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	cfgtest_header_absence "$@" || return 1
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	return 0
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}
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cfgtest_unit_interface_presence()
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{
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	cfgtest_internal_unit_test='unit_test'
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	cfgtest_interface_presence "$@" || return 1
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	return 0
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}
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cfgtest_unit_decl_presence()
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{
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	cfgtest_internal_unit_test='unit_test'
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	cfgtest_decl_presence "$@" || return 1
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	return 0
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}
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cfgtest_unit_type_size()
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{
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	cfgtest_internal_unit_test='unit_test'
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	cfgtest_type_size "$@" || return 1
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	return 0
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}