# cfgtest.sh: sofort's config test framework,

# for use from within a project's custom cfgdefs.sh.

# this file is covered by COPYING.SOFORT.

# in the common scenario, host-specific tests are preceded

# by a single invocation of cfgtest_host_section, whereas

# native (build) system tests are preceded by the invocation

# of cfgtest_native_section.

# cfgdefs fraework variables:

# mb_cfgtest_cc:      the compiler used for the current test

# mb_cfgtest_pkgconf: the pkgconf utility used for the current test

# mb_cfgtest_cflags:  the compiler flags used for the current test

# mb_cfgtest_cfgtype: the type of the current test (host/native)

# mb_cfgtest_makevar: the make variable affected by the current test

# mb_cfgtest_headers: headers for ad-hoc inclusion with the current test

# mb_cfgtest_attr:    if supported, the compiler-specific attribute definition

cfgtest_newline()

{

	printf '\n' >> $mb_pwd/cfgdefs.mk

}

cfgtest_comment()

{

	mb_internal_str='#'

	for mb_internal_arg ; do

		mb_internal_str="$mb_internal_str $mb_internal_arg"

	done

	printf '%s\n' "$mb_internal_str" >> $mb_pwd/cfgdefs.mk

}

cfgtest_host_section()

{

	mb_cfgtest_cc="$ccenv_host_cc"

	mb_cfgtest_pkgconf="${ccenv_host_pkgconf:-false}"

	mb_cfgtest_cfgtype='host'

	mb_cfgtest_stdin_input=${ccenv_host_stdin_input:-}

	mb_cfgtest_environment=${ccenv_host_cc_environment:-}

	mb_cfgtest_cflags=$(${mb_make} -n -f "$mb_pwd/Makefile.tmp" \

		OS_DSO_EXRULES=default                              \

		OS_SONAME=symlink                                   \

		OS_ARCHIVE_EXT='.a'                                 \

		.cflags-host)

	mb_cfgtest_cflags="${mb_cfgtest_cflags#*: }"

	mb_cfgtest_ldflags=$(${mb_make} -n -f "$mb_pwd/Makefile.tmp" \

		OS_DSO_EXRULES=default                               \

		OS_SONAME=symlink                                    \

		OS_ARCHIVE_EXT='.a'                                  \

		.ldflags-host)

	mb_cfgtest_ldflags="${mb_cfgtest_ldflags#*: }"

}

cfgtest_native_section()

{

	mb_cfgtest_cc="$ccenv_native_cc"

	mb_cfgtest_pkgconf="${ccenv_native_pkgconf:-false}"

	mb_cfgtest_cfgtype='native'

	mb_cfgtest_stdin_input=${ccenv_native_stdin_input:-}

	mb_cfgtest_environment=${ccenv_native_cc_environment:-}

	mb_cfgtest_cflags=$(${mb_make} -n -f "$mb_pwd/Makefile.tmp" \

		OS_DSO_EXRULES=default                              \

		OS_SONAME=symlink                                   \

		OS_ARCHIVE_EXT='.a'                                 \

		.cflags-native)

	mb_cfgtest_cflags="${mb_cfgtest_cflags#*: }"

	mb_cfgtest_ldflags=$(${mb_make} -n -f "$mb_pwd/Makefile.tmp" \

		OS_DSO_EXRULES=default                               \

		OS_SONAME=symlink                                    \

		OS_ARCHIVE_EXT='.a'                                  \

		.ldflags-native)

	mb_cfgtest_ldflags="${mb_cfgtest_ldflags#*: }"

}

cfgtest_prolog()

{

	cfgtest_line_dots='...........................'

	cfgtest_line_dots="${cfgtest_line_dots}${cfgtest_line_dots}"

	cfgtest_tool_desc=" == trying ${mb_cfgtest_cfgtype} ${1}: ${2}"

	cfgtest_tool_dlen="${#cfgtest_line_dots}"

	printf '\n%s\n' '________________________' >&3

	printf "cfgtest: probing for ${mb_cfgtest_cfgtype} ${1}: ${2}\n\n" >&3

	if [ "${cfgtest_silent:-}" != 'yes' ]; then

		printf "%${cfgtest_tool_dlen}.${cfgtest_tool_dlen}s" \

			"${cfgtest_tool_desc}  ${mb_line_dots}"

	fi

}

cfgtest_epilog()

{

	cfgtest_line_dots='...............'

	cfgtest_tool_dlen="$((${#cfgtest_line_dots} - ${#2}))"

	if [ "${cfgtest_silent:-}" != 'yes' ]; then

		printf "%${cfgtest_tool_dlen}.${cfgtest_tool_dlen}s  %s.\n" \

			"${cfgtest_line_dots}" "${2}"

	fi

	if [ "${1}" = 'snippet' ] && [ -f 'a.out' ]; then

		rm -f 'a.out'

	fi

	if [ "$mb_cfgtest_stdin_input" = 'no' ]; then

		rm 'cfgtest_c3RyaWN0X21vZGUK.c'

	fi

	if [ "${1}" = 'snippet' ] && [ "${2}" = '(error)' ]; then

		printf '\n\ncfgtest: the %s compiler %s %s.\n' \

			"$mb_cfgtest_cfgtype"                 \

			'failed to compile the above code'   \

			"${1}" >&3

		printf '%s\n' '------------------------' >&3

		return 1

	fi

	if [ "${1}" = 'attr' ] && [ "${2}" = '(error)' ]; then

		printf '\n\ncfgtest: the %s compiler %s %s_ attribute.\n' \

			"$mb_cfgtest_cfgtype"                            \

			'does not appear to support the _'              \

			"${3}" >&3

		printf '%s\n' '------------------------' >&3

		return 1

	fi

	if [ "${2}" = '-----' ] || [ "${2}" = '(missing)' ]; then

		printf '\n\ncfgtest: %s %s is missing or cannot be found.\n' "${1}" "${3}" >&3

		printf '%s\n' '------------------------' >&3

		return 1

	elif [ "${1}" = 'size-of-type' ] && [ "${2}" = '(error)' ]; then

		printf '\n\ncfgtest: could not determine size of type `%s.\n' "${3}'" >&3

		printf '%s\n' '------------------------' >&3

		return 1

	elif [ "${1}" = 'switch' ] && [ "${2}" = '(error)' ]; then

		printf '\n\ncfgtest: the switch `%s is not supported by the %s compiler.\n' \

			"${3}'" "$mb_cfgtest_cfgtype" >&3

		printf '%s\n' '------------------------' >&3

		return 1

	elif [ "${2}" = '(error)' ]; then

		printf '\n\ncfgtest: %s `%s is not defined or cannot be used.\n' "${1}" "${3}'" >&3

		printf '%s\n' '------------------------' >&3

		return 1

	fi

}

cfgtest_entity_size_prolog()

{

	cfgtest_line_dots='.......................'

	cfgtest_line_dots="${cfgtest_line_dots}${cfgtest_line_dots}"

	cfgtest_tool_desc=" == checking size of ${mb_cfgtest_cfgtype} type: ${@}"

	cfgtest_tool_dlen="${#cfgtest_line_dots}"

	printf '\n%s\n' '________________________' >&3

	printf "cfgtest: checking size of ${mb_cfgtest_cfgtype} type: ${@}\n\n" >&3

	printf "%${cfgtest_tool_dlen}.${cfgtest_tool_dlen}s" \

		"${cfgtest_tool_desc}  ${mb_line_dots}"

}

cfgtest_makevar_set()

{

	if [ -n "${@}" ]; then

		mb_internal_str='= '

	else

		mb_internal_str='='

	fi

	printf '%-25s%s%s\n' "$mb_cfgtest_makevar" "$mb_internal_str" "${@}" \

		>> $mb_pwd/cfgdefs.mk

	unset cfgtest_internal_unit_test

}

cfgtest_makevar_append()

{

	mb_internal_str='+='

	for mb_internal_arg ; do

		if ! [ -z "$mb_internal_arg" ]; then

			mb_internal_str="$mb_internal_str $mb_internal_arg"

		fi

	done

	printf '%-24s%s\n' "$mb_cfgtest_makevar" "$mb_internal_str" \

		>> $mb_pwd/cfgdefs.mk

	unset cfgtest_internal_unit_test

}

cfgtest_cflags_append()

{

	if [ $mb_cfgtest_cfgtype = 'host' ]; then

		mb_internal_makevar='CFLAGS_CONFIG'

	else

		mb_internal_makevar='NATIVE_CFLAGS'

	fi

	mb_cfgtest_makevar_saved=$mb_cfgtest_makevar

	mb_cfgtest_makevar=$mb_internal_makevar

	cfgtest_makevar_append "$@"

	mb_cfgtest_makevar=$mb_cfgtest_makevar_saved

}

cfgtest_ldflags_append()

{

	if [ $mb_cfgtest_cfgtype = 'host' ]; then

		mb_internal_makevar='LDFLAGS_CONFIG'

	else

		mb_internal_makevar='NATIVE_LDFLAGS'

	fi

	mb_cfgtest_makevar_saved=$mb_cfgtest_makevar

	mb_cfgtest_makevar=$mb_internal_makevar

	cfgtest_makevar_append "$@"

	mb_cfgtest_makevar=$mb_cfgtest_makevar_saved

}

cfgtest_common_init()

{

	# cfgtest variables

	cfgtest_type="${1:-}"

	if [ "$mb_cfgtest_stdin_input" = 'no' ]; then

		if [ "$cfgtest_type" = 'lib' ]; then

			cfgtest_fmt='%s cfgtest_c3RyaWN0X21vZGUK.c -o a.out'

		elif [ "$cfgtest_type" = 'ldflag' ]; then

			cfgtest_fmt='%s cfgtest_c3RyaWN0X21vZGUK.c -o a.out'

		else

			cfgtest_fmt='%s -c cfgtest_c3RyaWN0X21vZGUK.c -o a.out'

		fi

	elif [ "$cfgtest_type" = 'asm' ]; then

		cfgtest_fmt='%s -c -xc - -o a.out'

	elif [ "$cfgtest_type" = 'attr' ]; then

		cfgtest_fmt='%s -c -xc - -o a.out -Werror'

	elif [ "$cfgtest_type" = 'lib' ]; then

		cfgtest_fmt='%s -xc - -o a.out'

	elif [ "$cfgtest_type" = 'ldflag' ]; then

		cfgtest_fmt='%s -xc - -o a.out'

	else

		cfgtest_fmt='%s -S -xc - -o -'

	fi

	if [ "$cfgtest_type" = 'lib' ]; then

		cfgtest_cmd=$(printf "$cfgtest_fmt %s %s %s" \

			"$mb_cfgtest_cc"                     \

			"$mb_cfgtest_cflags"                 \

			"$mb_cfgtest_ldflags"                \

			"$cfgtest_libs")

	elif [ "$cfgtest_type" = 'ldflag' ]; then

		cfgtest_cmd=$(printf "$cfgtest_fmt %s %s %s" \

			"$mb_cfgtest_cc"                     \

			"$mb_cfgtest_cflags"                 \

			"$mb_cfgtest_ldflags"                \

			"$cfgtest_switches")

	elif [ "$cfgtest_type" = 'switch' ]; then

		cfgtest_cmd=$(printf "$cfgtest_fmt %s %s" \

			"$mb_cfgtest_cc"                  \

			"$mb_cfgtest_cflags"              \

			"$cfgtest_switches")

	else

		cfgtest_cmd=$(printf "$cfgtest_fmt %s" \

			"$mb_cfgtest_cc"               \

			"$mb_cfgtest_cflags")

	fi

	if [ -n "$mb_cfgtest_headers" ]; then

		cfgtest_inc=$(printf '#include <%s>\n' $mb_cfgtest_headers)

		cfgtest_src=$(printf '%s\n_\n' "$cfgtest_inc" \

			| m4 -D_="$cfgtest_code_snippet")

	else

		cfgtest_inc=

		cfgtest_src="$cfgtest_code_snippet"

	fi

	# config.log

	printf "$cfgtest_fmt" "$mb_cfgtest_cc" >&3

	for cfgtest_cflag in $(printf '%s' "$mb_cfgtest_cflags"); do

		printf ' \\\n\t%s' "$cfgtest_cflag" >&3

	done

	for cfgtest_ldflag in $(printf '%s' "$mb_cfgtest_ldflags"); do

		printf ' \\\n\t%s' "$cfgtest_ldflag" >&3

	done

	if [ "$cfgtest_type" = 'lib' ]; then

		for cfgtest_lib in $(printf '%s' "$cfgtest_libs"); do

			printf ' \\\n\t%s' "$cfgtest_lib" >&3

		done

	elif [ "$cfgtest_type" = 'switch' ] || [ "$cfgtest_type" = 'ldflag' ]; then

		for cfgtest_switch in $(printf '%s' "$cfgtest_switches"); do

			printf ' \\\n\t%s' "$cfgtest_switch" >&3

		done

	fi

	printf ' \\\n'                           >&3

	printf '<< _SRCEOF\n%s\n' "$cfgtest_src" >&3

	printf '_SRCEOF\n\n\n'                   >&3

	if [ "$mb_cfgtest_stdin_input" = 'no' ]; then

		printf '%s' "$cfgtest_src" > 'cfgtest_c3RyaWN0X21vZGUK.c'

		cfgtest_src=

	fi

}

cfgtest_header_presence()

{

	#init

	cfgtest_prolog 'header' "${1}"

	cfgtest_code_snippet=$(printf '#include <%s>\n' "${1}")

	cfgtest_code_onedecl='int fn(void){return 0;}'

	cfgtest_code_snippet=$(printf '%s\n%s\n' \

			"$cfgtest_code_snippet"   \

			"$cfgtest_code_onedecl")

	cfgtest_common_init

	# execute

	printf '%s\n' "$cfgtest_src"                \

		| eval $(printf '%s' "$cfgtest_cmd") \

		> /dev/null 2>&3                      \

	|| cfgtest_epilog 'header' '-----' "<${1}>"    \

	|| return

	# result

	mb_internal_str=$(printf '%s%s' '-DHAVE_' "${1}"  \

			| sed -e 's/\./_/g' -e 's@/@_@g'  \

			| tr "[:lower:]" "[:upper:]")

	if [ -z ${cfgtest_internal_unit_test:-} ]; then

		cfgtest_cflags_append "$mb_internal_str"

	else

		cfgtest_makevar_append "$mb_internal_str"

	fi

	printf 'cfgtest: %s header <%s> was found and may be included.\n' \

		"$mb_cfgtest_cfgtype" "${1}" >&3

	printf '%s\n' '------------------------' >&3

	cfgtest_epilog 'header' "${1}"

}

cfgtest_header_absence()

{

	#init

	cfgtest_prolog 'header absence' "${1}"

	cfgtest_code_snippet=$(printf '#include <%s>\n' "${1}")

	cfgtest_code_onedecl='int fn(void){return 0;}'

	cfgtest_code_snippet=$(printf '%s\n%s\n' \

			"$cfgtest_code_snippet"   \

			"$cfgtest_code_onedecl")

	cfgtest_common_init

	# execute

	printf '%s\n' "$cfgtest_src"                \

		| eval $(printf '%s' "$cfgtest_cmd") \

		> /dev/null 2>&3                      \

	&& printf 'cfgtest: %s header <%s>: no error.' \

		"$mb_cfgtest_cfgtype" "${1}" >&3        \

	&& cfgtest_epilog 'header' "${1}"                \

	&& return

	# result

	mb_internal_str=$(printf '%s%s' '-DHAVE_NO_' "$@" \

			| sed -e 's/\./_/g' -e 's@/@_@g'  \

			| tr "[:lower:]" "[:upper:]")

	if [ -z ${cfgtest_internal_unit_test:-} ]; then

		cfgtest_cflags_append "$mb_internal_str"

	else

		cfgtest_makevar_append "$mb_internal_str"

	fi

	printf 'cfgtest: %s header <%s> may not be included.\n' \

		"$mb_cfgtest_cfgtype" "${1}" >&3

	printf '%s\n' '------------------------' >&3

	cfgtest_epilog 'header' '-----' "${1}"

}

cfgtest_interface_presence()

{

	# init

	cfgtest_prolog 'interface' "${1}"

	cfgtest_code_snippet=$(printf 'void (*addr)() = (void (*)())&%;;\n' "${1}")

	cfgtest_common_init

	# execute

	printf '%s\n' "$cfgtest_src"                  \

		| eval $(printf '%s' "$cfgtest_cmd")   \

		> /dev/null 2>&3                        \

	|| cfgtest_epilog 'interface' '(error)' "${1}"   \

	|| return

	# result

	mb_internal_str=$(printf '%s%s' '-DHAVE_' "$@"  \

			| sed -e 's/\./_/g'             \

			| tr "[:lower:]" "[:upper:]")

	if [ -z ${cfgtest_internal_unit_test:-} ]; then

		cfgtest_cflags_append "$mb_internal_str"

	else

		cfgtest_makevar_append "$mb_internal_str"

	fi

	printf 'cfgtest: %s interface `%s'"'"' is available.\n' \

		"$mb_cfgtest_cfgtype" "${1}" >&3

	printf '%s\n' '------------------------' >&3

	cfgtest_epilog 'interface' "${1}"

	return 0

}

cfgtest_decl_presence()

{

	# init

	cfgtest_prolog 'decl' "${1}"

	cfgtest_code_snippet=$(printf 'void * any = (void *)(%s);' "${1}")

	cfgtest_common_init

	# execute

	printf '%s\n' "$cfgtest_src"                \

		| eval $(printf '%s' "$cfgtest_cmd") \

		> /dev/null 2>&3                      \

	|| cfgtest_epilog 'decl' '(error)' "${1}"      \

	|| return

	# does the argument solely consist of the macro or enum member name?

	mb_internal_str=$(printf '%s' "$@" | tr -d '[a-z][A-Z][0-9][_]')

	if [ -n "$mb_internal_str" ]; then

		cfgtest_epilog 'decl' '(defined)'

		return 0

	fi

	# result

	mb_internal_str=$(printf '%s%s' '-DHAVE_DECL_' "$@"  \

			| sed -e 's/\./_/g'                  \

			| tr "[:lower:]" "[:upper:]")

	if [ -z ${cfgtest_internal_unit_test:-} ]; then

		cfgtest_cflags_append "$mb_internal_str"

	else

		cfgtest_makevar_append "$mb_internal_str"

	fi

	printf 'cfgtest: `%s'"'"' is defined for the %s system.\n' \

		"${1}" "$mb_cfgtest_cfgtype" >&3

	printf '%s\n' '------------------------' >&3

	cfgtest_epilog 'decl' '(defined)'

	return 0

}

cfgtest_type_size()

{

	cfgtest_entity_size_prolog "$@"

	mb_internal_size=''

	mb_internal_test='char x[(sizeof(%s) == %s) ? 1 : -1];'

	for mb_internal_guess in 8 4 2 1 16 32 64 128; do

		if [ -z $mb_internal_size ]; then

			printf '# guess %s ===>\n' "$mb_internal_guess" >&3

			mb_internal_type="$@"

			cfgtest_code_snippet=$(printf "$mb_internal_test" \

				"$mb_internal_type" "$mb_internal_guess")

			cfgtest_common_init

			printf '%s\n' "$cfgtest_src"                \

				| eval $(printf '%s' "$cfgtest_cmd") \

				> /dev/null 2>&3                      \

			&& mb_internal_size=$mb_internal_guess

			printf '\n' >&3

		fi

	done

	# unrecognized type, or type size not within range

	if [ -z $mb_internal_size ]; then

		cfgtest_epilog 'size-of-type' '(error)' "@"

		return 1

	fi

	# -DSIZEOF_TYPE=SIZE

	mb_internal_str=$(printf '%s%s=%s' '-DSIZEOF_'        \

				"$mb_internal_type"           \

				"$mb_internal_size"           \

			| sed -e 's/\ /_/g' -e 's/*/P/g'      \

			| tr "[:lower:]" "[:upper:]")

	if [ -z ${cfgtest_internal_unit_test:-} ]; then

		cfgtest_cflags_append "$mb_internal_str"

	else

		cfgtest_makevar_append "$mb_internal_str"

	fi

	printf 'cfgtest: size of type `%s'"'"' determined to be %s\n' \

		"${@}" "$mb_internal_size" >&3

	printf '%s\n' '------------------------' >&3

	cfgtest_epilog 'size-of-type' "$mb_internal_size"

	return 0

}

cfgtest_attr_visibility()

{

	# init

	cfgtest_prolog 'compiler visibility attr' "${1}"

	cfgtest_attr_syntax='__attribute__((__visibility__("'"${1}"'")))'

	cfgtest_code_snippet="$cfgtest_attr_syntax"' int f_'"${1}"'(void);'

	cfgtest_common_init 'attr'

	# execute

	cfgtest_ret=1

	printf '%s\n' "$cfgtest_src"                \

		| eval $(printf '%s' "$cfgtest_cmd") \

		> /dev/null 2>&3                      \

	|| cfgtest_epilog 'attr' '(error)' "${1}"      \

	|| return

	# result

	mb_cfgtest_attr=$(printf '__attribute__\\(\\(__visibility__\\(\\"%s\\"\\)\\)\\)' "${1}")

	cfgtest_ret=0

	printf 'cfgtest: %s compiler: above attribute is supported; see also ccenv/%s.mk.\n\n' \

		"$mb_cfgtest_cfgtype" "$mb_cfgtest_cfgtype" >&3

	cfgtest_epilog 'attr' '(ok)'

	return 0

}

cfgtest_code_snippet_asm()

{

	# init

	cfgtest_prolog 'support of code snippet' '<...>'

	cfgtest_code_snippet="$@"

	cfgtest_common_init 'asm'

	# execute

	cfgtest_ret=1

	printf '%s\n' "$cfgtest_src"                \

		| eval $(printf '%s' "$cfgtest_cmd") \

		> /dev/null 2>&3                      \

	|| cfgtest_epilog 'snippet' '(error)'          \

	|| return

	# result

	cfgtest_ret=0

	printf 'cfgtest: %s compiler: above code snippet compiled successfully.\n\n' \

		"$mb_cfgtest_cfgtype" >&3

	cfgtest_epilog 'snippet' '(ok)'

	return 0

}

cfgtest_macro_definition()

{

	# init

	cfgtest_prolog 'macro definition' "${1}"

	cfgtest_code_snippet=$(printf '%s\n'      \

		"#ifndef ${1}"                     \

		"#error macro ${1} is not defined." \

		"#endif")

	cfgtest_common_init 'macro'

	# execute

	cfgtest_ret=1

	printf '%s\n' "$cfgtest_src"                \

		| eval $(printf '%s' "$cfgtest_cmd") \

		> /dev/null 2>&3                      \

	|| cfgtest_epilog 'macro' '(error)' "${1}"     \

	|| return

	# result

	cfgtest_ret=0

	printf 'cfgtest: %s compiler: above macro definition test compiled successfully.\n\n' \

		"$mb_cfgtest_cfgtype" >&3

	cfgtest_epilog 'macro' '(defined)'

	return 0

}

cfgtest_library_presence()

{

	# init

	cfgtest_libs=

	cfgtest_spc=

	for cfgtest_lib in ${@}; do

		cfgtest_libs="$cfgtest_libs$cfgtest_spc$cfgtest_lib"

		cfgtest_spc=' '

	done

	if [ "${1}" = "$cfgtest_libs" ]; then

		cfgtest_prolog 'library' "${1#*-l}"

	else

		cfgtest_prolog 'lib module' '(see config.log)'

	fi

	if [ "$mb_cfgtest_environment" = 'freestanding' ]; then

		if [ -z "ccenv_cc_underscore" ]; then

			cfgtest_code_snippet='int start(void){return 0;}'

		else

			cfgtest_code_snippet='int _start(void){return 0;}'

		fi

	else

		cfgtest_code_snippet='int main(void){return 0;}'

	fi

	cfgtest_common_init 'lib'

	# execute

	printf '%s\n' "$cfgtest_src"                \

		| eval $(printf '%s' "$cfgtest_cmd") \

		> /dev/null 2>&3                      \

	|| cfgtest_epilog 'library' '-----' "$@"       \

	|| return 1

	# result

	printf 'cfgtest: `%s'"'"' was accepted by the linker driver.\n' \

		"$cfgtest_libs" >&3

	printf '%s\n' '------------------------' >&3

	cfgtest_epilog 'library' '(present)'

	return 0

}

cfgtest_package_exists()

{

	# init

	cfgtest_pkg=

	for cfgtest_arg in ${@}; do

		case "$cfgtest_arg" in

			-*)

				;;

			*)

				cfgtest_pkg="$cfgtest_arg"

				;;

		esac

	done

	cfgtest_prolog 'package' "$cfgtest_pkg"