Add support for broken SA_RESTART on PTX.

Fix bug #103: allow ifdef, export, and unexport to expand their arguments.

1 files changed, 15 insertions, 0 deletions

diff --git a/configure.in b/configure.in
index 5abbad5..c5c8026 100644
--- a/configure.in
+++ b/configure.in
@@ -291,6 +291,21 @@ make_cv_sys_gnu_glob=no])])
 # Tell automake about this, so it can build the right .c files.
 AM_CONDITIONAL(USE_LOCAL_GLOB, test "$make_cv_sys_gnu_glob" = no)
 
+# PTX systems have a broken implementation of SA_RESTART.  I know of
+# no way to test for this behavior, so I'll just test for PTX
+
+case "$host" in
+  i386-sequent-sysv4)
+    AC_DEFINE(HAVE_BROKEN_RESTART, 1, [This system has SA_RESTART, but it doesn't work properly.])
+    echo ""
+    echo "WARNING: The SA_RESTART sigaction() flag does not work on PTX."
+    echo "         This causes 'make -j' to fail at random times."
+    echo "         I am installing a workaround, which is mostly but not 100%"
+    echo "         effective.  If you see random failures during 'make -j'"
+    echo "         you should either contact the bug list, or not use -j."
+    echo "" ;;
+esac
+
 # Let the makefile know what our build host is
 
 AC_DEFINE_UNQUOTED(MAKE_HOST,"$host",[Build host information.])