* configure.in (add_ons_automatic): New variable, set to yes or no

	indicating --enable-add-ons with no explicit list.
	(running add-on fragments): Allow a fragment to modify $libc_add_on
	and have that affect its place in the list of add-ons to use.
	* configure: Regenerated.

4 files changed, 38 insertions, 6 deletions

diff --git a/ChangeLog b/ChangeLog
index 4b86a8d2e9..f9e8f7e02e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2004-08-26  Roland McGrath  <roland@redhat.com>
+
+	* configure.in (add_ons_automatic): New variable, set to yes or no
+	indicating --enable-add-ons with no explicit list.
+	(running add-on fragments): Allow a fragment to modify $libc_add_on
+	and have that affect its place in the list of add-ons to use.
+	* configure: Regenerated.
+
 2004-08-26  Ulrich Drepper  <drepper@redhat.com>
 
 	* nscd/cache.c: Major rewrite.  The data is now optionally kept in
diff --git a/configure b/configure
index e3eda44575..0624aa7013 100755
--- a/configure
+++ b/configure
@@ -1593,11 +1593,13 @@ if test "${enable_add_ons+set}" = set; then
   enableval="$enable_add_ons"
   case "$enableval" in
     yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
+	 add_ons_automatic=yes
 	 test "$add_ons" = "*" && add_ons= ;;
-    *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
+    *) add_ons=`echo "$enableval" | sed 's/,/ /g'`
+       add_ons_automatic=no ;;
    esac
 else
-  add_ons=
+  add_ons= add_ons_automatic=no
 fi;
 
 
@@ -1859,7 +1861,11 @@ echo "$as_me: error: add-on directory \"$f\" does not exist" >&2;}
   done
 
   # Now source each add-on's configure fragment.
-  # The fragments can use $srcdir/$libc_add_on to find themselves.
+  # The fragments can use $srcdir/$libc_add_on to find themselves,
+  # and test $add_ons_automatic to see if they were explicitly requested.
+  # A fragment can clear (or even change) $libc_add_on to affect
+  # whether it goes into the list to be actually used in the build.
+  use_add_ons=
   for libc_add_on in $add_ons; do
     libc_add_on_frag=$srcdir/$libc_add_on/configure
     if test -r $libc_add_on_frag; then
@@ -1870,7 +1876,10 @@ echo "${ECHO_T}running configure fragment for add-on $libc_add_on" >&6
       { echo "$as_me:$LINENO: WARNING: add-on fragment $libc_add_on_frag missing" >&5
 echo "$as_me: WARNING: add-on fragment $libc_add_on_frag missing" >&2;}
     fi
+    use_add_ons="$use_add_ons $libc_add_on"
   done
+  # Use echo to strip excess whitespace.
+  add_ons="`echo $use_add_ons`"
 fi
 
 
diff --git a/configure.in b/configure.in
index e6976ce7f5..e8f2926382 100644
--- a/configure.in
+++ b/configure.in
@@ -175,10 +175,12 @@ AC_ARG_ENABLE([add-ons],
                              [configure and build add-ons in DIR1,DIR2,...  search for add-ons if no parameter given]),
   [case "$enableval" in
     yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
+	 add_ons_automatic=yes
 	 test "$add_ons" = "*" && add_ons= ;;
-    *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
+    *) add_ons=`echo "$enableval" | sed 's/,/ /g'`
+       add_ons_automatic=no ;;
    esac],
-  [add_ons=])
+  [add_ons= add_ons_automatic=no])
 
 dnl Let the user avoid using TLS.  Don't know why but...
 dnl XXX For now we disable support by default.
@@ -363,7 +365,11 @@ if test x"$add_ons" != x; then
   done
 
   # Now source each add-on's configure fragment.
-  # The fragments can use $srcdir/$libc_add_on to find themselves.
+  # The fragments can use $srcdir/$libc_add_on to find themselves,
+  # and test $add_ons_automatic to see if they were explicitly requested.
+  # A fragment can clear (or even change) $libc_add_on to affect
+  # whether it goes into the list to be actually used in the build.
+  use_add_ons=
   for libc_add_on in $add_ons; do
     libc_add_on_frag=$srcdir/$libc_add_on/configure
     if test -r $libc_add_on_frag; then
@@ -372,7 +378,10 @@ if test x"$add_ons" != x; then
     else
       AC_MSG_WARN(add-on fragment $libc_add_on_frag missing)
     fi
+    use_add_ons="$use_add_ons $libc_add_on"
   done
+  # Use echo to strip excess whitespace.
+  add_ons="`echo $use_add_ons`"
 fi
 AC_SUBST(add_ons)
 
diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog
index 69dbacf4d2..2932af739b 100644
--- a/linuxthreads/ChangeLog
+++ b/linuxthreads/ChangeLog
@@ -1,3 +1,9 @@
+2004-08-26  Roland McGrath  <roland@redhat.com>
+
+	* configure.in: New file.  If nptl add-on is also selected, barf if
+	explicit and elide ourselves if implicit.
+	* configure: Now generated.
+
 2004-08-25  Richard Sandiford  <rsandifo@redhat.com>
 
 	* sysdeps/unix/sysv/linux/mips/sysdep-cancel.h (CENABLE, CDISABLE,