+# Figure out what language subdirectories are present.
+# Look if the user specified --enable-languages="..."; if not, use
+# the environment variable $LANGUAGES if defined. $LANGUAGES might
+# go away some day.
+# NB: embedded tabs in this IF block -- do not untabify
+if test x"${enable_languages+set}" != xset; then
+ if test x"${LANGUAGES+set}" = xset; then
+ enable_languages="${LANGUAGES}"
+ echo configure.in: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
+ else
+ enable_languages=all
+ fi
+else
+ if test x"${enable_languages}" = x ||
+ test x"${enable_languages}" = xyes;
+ then
+ echo configure.in: --enable-languages needs at least one language argument 1>&2
+ exit 1
+ fi
+fi
+enable_languages=`echo "${enable_languages}" | sed -e 's/[ ,][ ,]*/,/g' -e 's/,$//'`
+
+# First scan to see if an enabled language requires some other language.
+# We assume that a given config-lang.in will list all the language
+# front ends it requires, even if some are required indirectly.
+for lang in ${srcdir}/gcc/*/config-lang.in ..
+do
+ case $lang in
+ ..)
+ ;;
+ # The odd quoting in the next line works around
+ # an apparent bug in bash 1.12 on linux.
+ ${srcdir}/gcc/[*]/config-lang.in)
+ ;;
+ *)
+ lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^ ]*\).*$,\1,p' $lang`
+ this_lang_requires=`sed -n -e 's,^lang_requires=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^lang_requires=\([^ ]*\).*$,\1,p' $lang`
+ for other in $this_lang_requires
+ do
+ case ,${enable_languages}, in
+ *,$other,*)
+ ;;
+ *,all,*)
+ ;;
+ *,$lang_alias,*)
+ echo " \`$other' language required by \`$lang_alias'; enabling" 1>&2
+ enable_languages="$enable_languages,$other"
+ ;;
+ esac
+ done
+ ;;
+ esac
+done
+
+subdirs=
+for lang in ${srcdir}/gcc/*/config-lang.in ..
+do
+ case $lang in
+ ..) ;;
+ # The odd quoting in the next line works around
+ # an apparent bug in bash 1.12 on linux.
+ ${srcdir}/gcc/[*]/config-lang.in) ;;
+ *)
+ lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^ ]*\).*$,\1,p' $lang`
+ this_lang_libs=`sed -n -e 's,^target_libs=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^target_libs=\([^ ]*\).*$,\1,p' $lang`
+ this_lang_dirs=`sed -n -e 's,^lang_dirs=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^lang_dirs=\([^ ]*\).*$,\1,p' $lang`
+ build_by_default=`sed -n -e 's,^build_by_default=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^build_by_default=\([^ ]*\).*$,\1,p' $lang`
+ if test "x$lang_alias" = x
+ then
+ echo "$lang doesn't set \$language." 1>&2
+ exit 1
+ fi
+ case ${build_by_default},${enable_languages}, in
+ *,$lang_alias,*) add_this_lang=yes ;;
+ no,*) add_this_lang=no ;;
+ *,all,*) add_this_lang=yes ;;
+ *) add_this_lang=no ;;
+ esac
+ if test x"${add_this_lang}" = xyes; then
+ eval target_libs='"$target_libs "'\"$this_lang_libs\"
+ else
+ eval noconfigdirs='"$noconfigdirs "'\"$this_lang_libs $this_lang_dirs\"
+ fi
+ ;;
+ esac
+done
+