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configure: Support disabling specific languages [PR12407]
Sometimes it can be desirable to get the semantics of --enable-languages=all, but to exclude one or more languages from the build. Currently this is not directly supported; the best you can do is to list the ones you do want to be built as arguments to --enable-languages. In addition to being inconvenient, this also complicates cross-platform portability, since --enable-languages=all carries the useful semantics that unsupported languages will be skipped automatically; by contrast, languages listed explicitly as arguments to --enable-languages will produce a hard error if they are not supported. This patch extends the syntax of --enable-languages so that, e.g.: --enable-languages=all,^xyz,^abc would build every supported language other than xyz and abc. ChangeLog: PR bootstrap/12407 * configure.ac: Add feature to parsing of --enable-languages so that a language can be disabled by prefixing it with a caret. * configure: Regenerate. gcc/ChangeLog: PR bootstrap/12407 * doc/install.texi (--enable-languages): Document the new language exclusion feature.
This commit is contained in:
Lewis Hyatt
189
configure
vendored
189
configure
vendored
@@ -10093,16 +10093,40 @@ if test -d ${srcdir}/gcc; then
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# 'f95' is the old name for the 'fortran' language. We issue a warning
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# and make the substitution.
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case ,${enable_languages}, in
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*,f95,*)
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*,f95,* | *,^f95,*)
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echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
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enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
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;;
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esac
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# Extract the language disable requests. N.B. some non-GNU sed, e.g. on SunOS,
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# will ignore a line without a trailing newline.
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disable_languages=`echo "$enable_languages" | tr , "$as_nl" | grep '^\^' | (tr "$as_nl" , ; echo) | sed -e 's/\^//g' -e 's/,$//'`
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new_enable_languages=
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for lang in `echo "$enable_languages" | tr , ' '`; do
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case "${lang}:,${disable_languages}," in
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^default:* | ^all:*)
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as_fn_error $? "only specific individual languages may be disabled, not \"$lang\"" "$LINENO" 5
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;;
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^lto:*)
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as_fn_error $? "LTO should be disabled with the \"--disable-lto\" argument, not via \"--enable-languages=^lto\"" "$LINENO" 5
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;;
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^c:*)
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as_fn_error $? "language \"c\" cannot be disabled" "$LINENO" 5
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;;
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^* | ${lang}:*,${lang},*) ;;
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*) new_enable_languages="${new_enable_languages}${lang}," ;;
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esac
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done
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enable_languages=`echo "$new_enable_languages" | sed -e 's/,$//'`
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# If bootstrapping, C++ must be enabled.
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case ",$enable_languages,:$enable_bootstrap" in
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*,c++,*:*) ;;
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*:yes)
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case ",${enable_languages},:${enable_bootstrap}:,${disable_languages}," in
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*:yes:*,c++,*)
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as_fn_error $? "c++ cannot be disabled for a bootstrap build" "$LINENO" 5
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;;
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*,c++,*:*:*) ;;
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*:yes:*)
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if test -f ${srcdir}/gcc/cp/config-lang.in; then
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enable_languages="${enable_languages},c++"
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else
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@@ -10111,9 +10135,9 @@ if test -d ${srcdir}/gcc; then
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;;
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esac
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# First scan to see if an enabled language requires some other language.
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# We assume that a given config-lang.in will list all the language
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# front ends it requires, even if some are required indirectly.
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# Collect the list of default languages; keep it prefixed and suffixed with
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# commas for later convenience.
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default_languages=,
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for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
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case ${lang_frag} in
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..) ;;
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@@ -10121,28 +10145,85 @@ if test -d ${srcdir}/gcc; then
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# an apparent bug in bash 1.12 on linux.
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${srcdir}/gcc/[*]/config-lang.in) ;;
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*)
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# From the config-lang.in, get $language, $lang_requires, and
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# $lang_requires_boot_languages.
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# From the config-lang.in, get $language and $build_by_default.
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language=
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lang_requires=
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lang_requires_boot_languages=
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# set srcdir during sourcing lang_frag to the gcc dir.
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# Sadly overriding srcdir on the . line doesn't work in plain sh as it
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# pollutes this shell
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build_by_default=yes
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# See note below about saving srcdir.
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saved_srcdir=${srcdir}
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srcdir=${srcdir}/gcc . ${lang_frag}
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srcdir=${saved_srcdir}
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for other in ${lang_requires} ${lang_requires_boot_languages}; do
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case ,${enable_languages}, in
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*,$other,*) ;;
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*,default,*) ;;
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*,all,*) ;;
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*,$language,*)
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echo " \`$other' language required by \`$language'; enabling" 1>&2
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enable_languages="${enable_languages},${other}"
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if test x"$build_by_default" = xyes; then
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default_languages="${default_languages}${language},"
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fi
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;;
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esac
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done
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# First scan to see if an enabled language requires some other language.
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# We assume that a given config-lang.in will list all the language
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# front ends it requires, even if some are required indirectly.
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delayed_error_languages=,
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for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
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case ${lang_frag} in
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..) ;;
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# The odd quoting in the next line works around
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# an apparent bug in bash 1.12 on linux.
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${srcdir}/gcc/[*]/config-lang.in) ;;
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*)
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# From the config-lang.in, get $language, $lang_requires, and
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# $lang_requires_boot_languages.
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language=
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lang_requires=
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lang_requires_boot_languages=
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# set srcdir during sourcing lang_frag to the gcc dir.
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# Sadly overriding srcdir on the . line doesn't work in plain sh as it
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# pollutes this shell
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saved_srcdir=${srcdir}
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srcdir=${srcdir}/gcc . ${lang_frag}
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srcdir=${saved_srcdir}
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# Determine if this language was requested; if not, don't bring in its
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# dependencies. To match historical behavior, do bring in the dependencies
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# for unsupported languages that were not explicitly disabled.
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case ,${disable_languages}, in
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*,${language},*) continue ;;
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esac
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case ,${enable_languages}, in
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*,${language},* | *,all,*) ;;
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*,default,*)
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case ${default_languages} in
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*,${language},*) ;;
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*) continue ;;
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esac
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;;
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*) continue ;;
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esac
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# This language was indeed requested; make sure all dependencies are
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# also enabled.
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for other in ${lang_requires} ${lang_requires_boot_languages}; do
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need_to_add=0
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case ,${enable_languages},:,${disable_languages}, in
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*:*,${other},*)
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# This language cannot be built because one of its dependencies
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# was explicitly disabled. Don't complain just yet, though; other
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# checks later may decide the language won't be built anyway.
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delayed_error_languages="${delayed_error_languages}${language}:${other},"
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;;
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*,${other},*:* | *,all,*:*) ;;
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*,default,*:*)
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case ${default_languages} in
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*,${other},*) ;;
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*) need_to_add=1 ;;
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esac
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;;
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*) need_to_add=1 ;;
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esac
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done
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if test $need_to_add = 1; then
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echo " \`$other' language required by \`$language'; enabling" 1>&2
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enable_languages="${enable_languages},${other}"
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fi
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done
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for other in ${lang_requires_boot_languages} ; do
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if test "$other" != "c"; then
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case ,${enable_stage1_languages}, in
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@@ -10150,17 +10231,13 @@ if test -d ${srcdir}/gcc; then
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*,default,*) ;;
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*,all,*) ;;
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*)
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case ,${enable_languages}, in
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*,$language,*)
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echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
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enable_stage1_languages="$enable_stage1_languages,${other}"
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;;
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esac
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echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
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enable_stage1_languages="$enable_stage1_languages,${other}"
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;;
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esac
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fi
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done
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;;
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fi
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done
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;;
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esac
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done
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@@ -10199,13 +10276,12 @@ if test -d ${srcdir}/gcc; then
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${srcdir}/gcc/[*]/config-lang.in) ;;
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*)
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# From the config-lang.in, get $language, $target_libs,
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# $lang_dirs, $boot_language, and $build_by_default
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# $lang_dirs, and $boot_language.
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language=
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target_libs=
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lang_dirs=
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subdir_requires=
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boot_language=no
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build_by_default=yes
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# set srcdir during sourcing. See above about save & restore
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saved_srcdir=${srcdir}
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srcdir=${srcdir}/gcc . ${lang_frag}
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@@ -10221,21 +10297,29 @@ if test -d ${srcdir}/gcc; then
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add_this_lang=no
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# C is always enabled, so no need to add it again
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if test "$language" != "c"; then
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case ,${enable_languages}, in
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*,${language},*)
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# Language was explicitly selected; include it
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add_this_lang=yes
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;;
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*,all,*)
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# All languages are enabled
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add_this_lang=all
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;;
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*,default,*)
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# 'default' was selected, select it if it is a default language
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add_this_lang=${build_by_default}
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;;
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esac
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if test "$language" != "c"; then
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# Determine if this language was requested.
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case ,${disable_languages}, in
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*,${language},* ) ;;
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*)
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case ,${enable_languages}, in
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*,${language},*)
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# Language was explicitly selected; include it
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add_this_lang=yes
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;;
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*,all,*)
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# All languages are enabled, and this one not excluded.
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add_this_lang=all
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;;
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*,default,*)
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# 'default' was selected, select it if it is a default language
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case ${default_languages} in
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*,${language},*) add_this_lang=yes ;;
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esac
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;;
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esac
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;;
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esac
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fi
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# Disable languages that need other directories if these aren't available.
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@@ -10341,7 +10425,7 @@ $as_echo "$as_me: WARNING: --enable-host-shared required to build $language" >&2
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# Silently disable.
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add_this_lang=unsupported
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;;
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esac
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esac
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;;
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esac
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@@ -10400,6 +10484,11 @@ $as_echo "$as_me: WARNING: ${language} not supported for this target" >&2;}
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potential_languages="${potential_languages}${language},"
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;;
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all|yes)
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case "$delayed_error_languages" in
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*,${language}:*,*)
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as_fn_error $? "invalid configuration for language \"${language}\"; at least one of the dependencies \"$delayed_error_languages\" was explicitly disabled" "$LINENO" 5
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;;
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esac
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new_enable_languages="${new_enable_languages}${language},"
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potential_languages="${potential_languages}${language},"
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missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
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189
configure.ac
189
configure.ac
@@ -2255,16 +2255,40 @@ if test -d ${srcdir}/gcc; then
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# 'f95' is the old name for the 'fortran' language. We issue a warning
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# and make the substitution.
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case ,${enable_languages}, in
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*,f95,*)
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*,f95,* | *,^f95,*)
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echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
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enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
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;;
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esac
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# Extract the language disable requests. N.B. some non-GNU sed, e.g. on SunOS,
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# will ignore a line without a trailing newline.
|
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disable_languages=`echo "$enable_languages" | tr , "$as_nl" | grep '^\^' | (tr "$as_nl" , ; echo) | sed -e 's/\^//g' -e 's/,$//'`
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new_enable_languages=
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for lang in `echo "$enable_languages" | tr , ' '`; do
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case "${lang}:,${disable_languages}," in
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^default:* | ^all:*)
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AC_MSG_ERROR([only specific individual languages may be disabled, not "$lang"])
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;;
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^lto:*)
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AC_MSG_ERROR([LTO should be disabled with the "--disable-lto" argument, not via "--enable-languages=^lto"])
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;;
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^c:*)
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AC_MSG_ERROR([language "c" cannot be disabled])
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;;
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^* | ${lang}:*,${lang},*) ;;
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*) new_enable_languages="${new_enable_languages}${lang}," ;;
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esac
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done
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enable_languages=`echo "$new_enable_languages" | sed -e 's/,$//'`
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# If bootstrapping, C++ must be enabled.
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case ",$enable_languages,:$enable_bootstrap" in
|
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*,c++,*:*) ;;
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*:yes)
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case ",${enable_languages},:${enable_bootstrap}:,${disable_languages}," in
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*:yes:*,c++,*)
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AC_MSG_ERROR([c++ cannot be disabled for a bootstrap build])
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;;
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*,c++,*:*:*) ;;
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*:yes:*)
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if test -f ${srcdir}/gcc/cp/config-lang.in; then
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enable_languages="${enable_languages},c++"
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else
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@@ -2273,9 +2297,9 @@ if test -d ${srcdir}/gcc; then
|
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;;
|
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esac
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# First scan to see if an enabled language requires some other language.
|
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# We assume that a given config-lang.in will list all the language
|
||||
# front ends it requires, even if some are required indirectly.
|
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# Collect the list of default languages; keep it prefixed and suffixed with
|
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# commas for later convenience.
|
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default_languages=,
|
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for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
|
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case ${lang_frag} in
|
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..) ;;
|
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@@ -2283,28 +2307,85 @@ if test -d ${srcdir}/gcc; then
|
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# an apparent bug in bash 1.12 on linux.
|
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${srcdir}/gcc/[[*]]/config-lang.in) ;;
|
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*)
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# From the config-lang.in, get $language, $lang_requires, and
|
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# $lang_requires_boot_languages.
|
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# From the config-lang.in, get $language and $build_by_default.
|
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language=
|
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lang_requires=
|
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lang_requires_boot_languages=
|
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# set srcdir during sourcing lang_frag to the gcc dir.
|
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# Sadly overriding srcdir on the . line doesn't work in plain sh as it
|
||||
# pollutes this shell
|
||||
build_by_default=yes
|
||||
# See note below about saving srcdir.
|
||||
saved_srcdir=${srcdir}
|
||||
srcdir=${srcdir}/gcc . ${lang_frag}
|
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srcdir=${saved_srcdir}
|
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for other in ${lang_requires} ${lang_requires_boot_languages}; do
|
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case ,${enable_languages}, in
|
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*,$other,*) ;;
|
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*,default,*) ;;
|
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*,all,*) ;;
|
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*,$language,*)
|
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echo " \`$other' language required by \`$language'; enabling" 1>&2
|
||||
enable_languages="${enable_languages},${other}"
|
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if test x"$build_by_default" = xyes; then
|
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default_languages="${default_languages}${language},"
|
||||
fi
|
||||
;;
|
||||
esac
|
||||
done
|
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|
||||
# First scan to see if an enabled language requires some other language.
|
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# We assume that a given config-lang.in will list all the language
|
||||
# front ends it requires, even if some are required indirectly.
|
||||
delayed_error_languages=,
|
||||
for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
|
||||
case ${lang_frag} in
|
||||
..) ;;
|
||||
# The odd quoting in the next line works around
|
||||
# an apparent bug in bash 1.12 on linux.
|
||||
${srcdir}/gcc/[[*]]/config-lang.in) ;;
|
||||
*)
|
||||
# From the config-lang.in, get $language, $lang_requires, and
|
||||
# $lang_requires_boot_languages.
|
||||
language=
|
||||
lang_requires=
|
||||
lang_requires_boot_languages=
|
||||
# set srcdir during sourcing lang_frag to the gcc dir.
|
||||
# Sadly overriding srcdir on the . line doesn't work in plain sh as it
|
||||
# pollutes this shell
|
||||
saved_srcdir=${srcdir}
|
||||
srcdir=${srcdir}/gcc . ${lang_frag}
|
||||
srcdir=${saved_srcdir}
|
||||
|
||||
# Determine if this language was requested; if not, don't bring in its
|
||||
# dependencies. To match historical behavior, do bring in the dependencies
|
||||
# for unsupported languages that were not explicitly disabled.
|
||||
case ,${disable_languages}, in
|
||||
*,${language},*) continue ;;
|
||||
esac
|
||||
case ,${enable_languages}, in
|
||||
*,${language},* | *,all,*) ;;
|
||||
*,default,*)
|
||||
case ${default_languages} in
|
||||
*,${language},*) ;;
|
||||
*) continue ;;
|
||||
esac
|
||||
;;
|
||||
*) continue ;;
|
||||
esac
|
||||
|
||||
# This language was indeed requested; make sure all dependencies are
|
||||
# also enabled.
|
||||
for other in ${lang_requires} ${lang_requires_boot_languages}; do
|
||||
need_to_add=0
|
||||
case ,${enable_languages},:,${disable_languages}, in
|
||||
*:*,${other},*)
|
||||
# This language cannot be built because one of its dependencies
|
||||
# was explicitly disabled. Don't complain just yet, though; other
|
||||
# checks later may decide the language won't be built anyway.
|
||||
delayed_error_languages="${delayed_error_languages}${language}:${other},"
|
||||
;;
|
||||
*,${other},*:* | *,all,*:*) ;;
|
||||
*,default,*:*)
|
||||
case ${default_languages} in
|
||||
*,${other},*) ;;
|
||||
*) need_to_add=1 ;;
|
||||
esac
|
||||
;;
|
||||
*) need_to_add=1 ;;
|
||||
esac
|
||||
done
|
||||
if test $need_to_add = 1; then
|
||||
echo " \`$other' language required by \`$language'; enabling" 1>&2
|
||||
enable_languages="${enable_languages},${other}"
|
||||
fi
|
||||
done
|
||||
for other in ${lang_requires_boot_languages} ; do
|
||||
if test "$other" != "c"; then
|
||||
case ,${enable_stage1_languages}, in
|
||||
@@ -2312,17 +2393,13 @@ if test -d ${srcdir}/gcc; then
|
||||
*,default,*) ;;
|
||||
*,all,*) ;;
|
||||
*)
|
||||
case ,${enable_languages}, in
|
||||
*,$language,*)
|
||||
echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
|
||||
enable_stage1_languages="$enable_stage1_languages,${other}"
|
||||
;;
|
||||
esac
|
||||
echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
|
||||
enable_stage1_languages="$enable_stage1_languages,${other}"
|
||||
;;
|
||||
esac
|
||||
fi
|
||||
done
|
||||
;;
|
||||
fi
|
||||
done
|
||||
;;
|
||||
esac
|
||||
done
|
||||
|
||||
@@ -2361,13 +2438,12 @@ if test -d ${srcdir}/gcc; then
|
||||
${srcdir}/gcc/[[*]]/config-lang.in) ;;
|
||||
*)
|
||||
# From the config-lang.in, get $language, $target_libs,
|
||||
# $lang_dirs, $boot_language, and $build_by_default
|
||||
# $lang_dirs, and $boot_language.
|
||||
language=
|
||||
target_libs=
|
||||
lang_dirs=
|
||||
subdir_requires=
|
||||
boot_language=no
|
||||
build_by_default=yes
|
||||
# set srcdir during sourcing. See above about save & restore
|
||||
saved_srcdir=${srcdir}
|
||||
srcdir=${srcdir}/gcc . ${lang_frag}
|
||||
@@ -2383,21 +2459,29 @@ if test -d ${srcdir}/gcc; then
|
||||
|
||||
add_this_lang=no
|
||||
# C is always enabled, so no need to add it again
|
||||
if test "$language" != "c"; then
|
||||
case ,${enable_languages}, in
|
||||
*,${language},*)
|
||||
# Language was explicitly selected; include it
|
||||
add_this_lang=yes
|
||||
;;
|
||||
*,all,*)
|
||||
# All languages are enabled
|
||||
add_this_lang=all
|
||||
;;
|
||||
*,default,*)
|
||||
# 'default' was selected, select it if it is a default language
|
||||
add_this_lang=${build_by_default}
|
||||
;;
|
||||
esac
|
||||
if test "$language" != "c"; then
|
||||
# Determine if this language was requested.
|
||||
case ,${disable_languages}, in
|
||||
*,${language},* ) ;;
|
||||
*)
|
||||
case ,${enable_languages}, in
|
||||
*,${language},*)
|
||||
# Language was explicitly selected; include it
|
||||
add_this_lang=yes
|
||||
;;
|
||||
*,all,*)
|
||||
# All languages are enabled, and this one not excluded.
|
||||
add_this_lang=all
|
||||
;;
|
||||
*,default,*)
|
||||
# 'default' was selected, select it if it is a default language
|
||||
case ${default_languages} in
|
||||
*,${language},*) add_this_lang=yes ;;
|
||||
esac
|
||||
;;
|
||||
esac
|
||||
;;
|
||||
esac
|
||||
fi
|
||||
|
||||
# Disable languages that need other directories if these aren't available.
|
||||
@@ -2498,7 +2582,7 @@ directories, to avoid imposing the performance cost of
|
||||
# Silently disable.
|
||||
add_this_lang=unsupported
|
||||
;;
|
||||
esac
|
||||
esac
|
||||
;;
|
||||
esac
|
||||
|
||||
@@ -2554,6 +2638,11 @@ directories, to avoid imposing the performance cost of
|
||||
potential_languages="${potential_languages}${language},"
|
||||
;;
|
||||
all|yes)
|
||||
case "$delayed_error_languages" in
|
||||
*,${language}:*,*)
|
||||
AC_MSG_ERROR([invalid configuration for language "${language}"; at least one of the dependencies "$delayed_error_languages" was explicitly disabled])
|
||||
;;
|
||||
esac
|
||||
new_enable_languages="${new_enable_languages}${language},"
|
||||
potential_languages="${potential_languages}${language},"
|
||||
missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
|
||||
|
||||
@@ -2099,7 +2099,7 @@ this option is still experimental and not for normal use yet.
|
||||
|
||||
Default is the traditional behavior @option{--with-aix-soname=@samp{aix}}.
|
||||
|
||||
@item --enable-languages=@var{lang1},@var{lang2},@dots{}
|
||||
@item --enable-languages=[^]@var{lang1},[^]@var{lang2},@dots{}
|
||||
Specify that only a particular subset of compilers and
|
||||
their runtime libraries should be built. For a list of valid values for
|
||||
@var{langN} you can issue the following command in the
|
||||
@@ -2119,9 +2119,19 @@ LTO is not a
|
||||
default language, but is built by default because @option{--enable-lto} is
|
||||
enabled by default. The other languages are default languages. If
|
||||
@code{all} is specified, then all available languages are built. An
|
||||
exception is @code{jit} language, which requires
|
||||
exception is the @code{jit} language, which requires
|
||||
@option{--enable-host-shared} to be included with @code{all}.
|
||||
|
||||
If a language name is prefixed with a caret, such as
|
||||
@samp{--enable-languages=all,^obj-c++}, then that language will
|
||||
not be built. This is most useful when combined with @code{all} or
|
||||
@code{default}. A language disabled in this way will be disabled even
|
||||
if it is also included without the leading caret earlier or later in
|
||||
the argument to @option{--enable-languages}. An attempt to disable a
|
||||
language that is a prerequisite for an enabled languaged---(whether
|
||||
the latter language was enabled explicitly, or implicitly via the
|
||||
@code{default} or @code{all} directives)---is invalid.
|
||||
|
||||
@item --enable-stage1-languages=@var{lang1},@var{lang2},@dots{}
|
||||
Specify that a particular subset of compilers and their runtime
|
||||
libraries should be built with the system C compiler during stage 1 of
|
||||
|
||||
Reference in New Issue
Block a user