[build] Properly track GCC language configure fragments

The 'gcc/configure' script sources all 'gcc/*/config-lang.in' files, but fails
to emit such dependency information into the build machinery.  That means,
currently, when something gets changed in a 'gcc/*/config-lang.in' file, this
is not noticed, and doesn't propagate through the build machinery.

Handling of configure fragments is modelled in the same way as it already
exists for Makefile fragments.

	gcc/
	* Makefile.in (LANG_CONFIGUREFRAGS): Define.
	(config.status): Use/depend on it.
	* configure.ac (all_lang_configurefrags): Track, 'AC_SUBST'.
	* configure: Regenerate.

From-SVN: r278035

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 96efa42..a1e928b 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2019-11-11  Thomas Schwinge  <thomas@codesourcery.com>
+
+       * Makefile.in (LANG_CONFIGUREFRAGS): Define.
+       (config.status): Use/depend on it.
+       * configure.ac (all_lang_configurefrags): Track, 'AC_SUBST'.
+       * configure: Regenerate.
+
 2019-11-11  Jiufu Guo  <guojiufu@linux.ibm.com>
 
        PR tree-optimization/88760

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 95f054c..ac21401 100644 (file)
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -1122,6 +1122,7 @@ endif
 # Support for additional languages (other than C).
 # C can be supported this way too (leave for later).
 
+LANG_CONFIGUREFRAGS  = @all_lang_configurefrags@
 LANG_MAKEFRAGS = @all_lang_makefrags@
 
 # Used by gcc/jit/Make-lang.in
@@ -1910,7 +1911,7 @@ cstamp-h: config.in config.status
 # Really, really stupid make features, such as SUN's KEEP_STATE, may force
 # a target to build even if it is up-to-date.  So we must verify that
 # config.status does not exist before failing.
-config.status: $(srcdir)/configure $(srcdir)/config.gcc
+config.status: $(srcdir)/configure $(srcdir)/config.gcc $(LANG_CONFIGUREFRAGS)
        @if [ ! -f config.status ] ; then \
          echo You must configure gcc.  Look at http://gcc.gnu.org/install/ for details.; \
          false; \

diff --git a/gcc/configure b/gcc/configure
index a2df82e..be58e1a 100755 (executable)
--- a/gcc/configure
+++ b/gcc/configure
@@ -701,6 +701,7 @@ build_exeext
 all_selected_languages
 all_languages
 all_lang_makefrags
+all_lang_configurefrags
 all_gtfiles
 all_compilers
 srcdir
@@ -18937,7 +18938,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 18940 "configure"
+#line 18941 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -19043,7 +19044,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 19046 "configure"
+#line 19047 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -29928,7 +29929,8 @@ lang_tree_files=
 all_languages=
 all_compilers=
 all_outputs='Makefile'
-# List of language makefile fragments.
+# List of language configure and makefile fragments.
+all_lang_configurefrags=
 all_lang_makefrags=
 # Additional files for gengtype
 all_gtfiles="$target_gtfiles"
@@ -30014,6 +30016,7 @@ do
        esac
        $ok || continue
 
+       all_lang_configurefrags="$all_lang_configurefrags \$(srcdir)/$gcc_subdir/config-lang.in"
        all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
        if test -f $srcdir/$gcc_subdir/lang.opt; then
            lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
@@ -30186,6 +30189,7 @@ fi
 
 
 
+
 # Echo link setup.
 if test x${build} = x${host} ; then
   if test x${host} = x${target} ; then

diff --git a/gcc/configure.ac b/gcc/configure.ac
index 5f32fd4..6bce1e3 100644 (file)
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -6333,7 +6333,8 @@ lang_tree_files=
 all_languages=
 all_compilers=
 all_outputs='Makefile'
-# List of language makefile fragments.
+# List of language configure and makefile fragments.
+all_lang_configurefrags=
 all_lang_makefrags=
 # Additional files for gengtype
 all_gtfiles="$target_gtfiles"
@@ -6421,6 +6422,7 @@ changequote([,])dnl
        esac
        $ok || continue
 
+       all_lang_configurefrags="$all_lang_configurefrags \$(srcdir)/$gcc_subdir/config-lang.in"
        all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
        if test -f $srcdir/$gcc_subdir/lang.opt; then
            lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
@@ -6528,6 +6530,7 @@ AC_SUBST(subdirs)
 AC_SUBST(srcdir)
 AC_SUBST(all_compilers)
 AC_SUBST(all_gtfiles)
+AC_SUBST(all_lang_configurefrags)
 AC_SUBST(all_lang_makefrags)
 AC_SUBST(all_languages)
 AC_SUBST(all_selected_languages)