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-rw-r--r--sysdeps/unix/sysv/linux/configure27
1 files changed, 27 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/configure b/sysdeps/unix/sysv/linux/configure
index 2701e27298..a8a9cc4702 100644
--- a/sysdeps/unix/sysv/linux/configure
+++ b/sysdeps/unix/sysv/linux/configure
@@ -251,6 +251,33 @@ case "$prefix" in
;;
esac
+# Under Linux the NPTL add-on should be available.
+case $add_ons in
+ # It is available. Good.
+ *nptl*)
+ nptl_missing=
+ ;;
+ *)
+ nptl_missing=yes
+ ;;
+esac
+
+if test "$nptl_missing"; then
+ if test $enable_sanity = yes; then
+ echo "\
+*** On GNU/Linux systems it is normal to compile GNU libc with the
+*** \`nptl' add-on. Without that, the library will be
+*** incompatible with normal GNU/Linux systems.
+*** If you really mean to not use this add-on, run configure again
+*** using the extra parameter \`--disable-sanity-checks'."
+ exit 1
+ else
+ echo "\
+*** WARNING: Are you sure you do not want to use the \`nptl'
+*** add-on?"
+ fi
+fi
+
if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
if test $enable_sanity = yes; then
echo "\