X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/f1397316ff9824d76d2953cfd3cef2bef5be92ee..e77299d3416e7e737523afdc0642734205e46d59:/runtests.SH?ds=sidebyside

diff --git a/runtests.SH b/runtests.SH
index 481a237..71f41d1 100755
--- a/runtests.SH
+++ b/runtests.SH
@@ -28,6 +28,21 @@ $spitshell >>runtests <<'!NO!SUBS!'
 
 export PATH || (echo "OOPS, this isn't sh.  Desperation time.  I will feed myself to sh."; sh $0; kill $$)
 
+# Avoid "warning: jobserver unavailable: using -j1." warnings under GNU make.
+# When gmake -j N spawns a child, it passes
+#    MAKEFLAGS=" --jobserver-fds=3,4 -j".
+# in the environment.  Also, if make recognises that the child is another
+# make (e.g. it's invoked as $(MAKE) or +command), it keeps open fd's 3
+# and 4 to allow the child process to access the job server. Otherwise,
+# those fd's aren't kept open.
+# In the case where one does 'make -j 16 test_harness', this script is
+# called with MAKEFLAGS set, but fd's 3 and 4 closed. Later when
+# descendents of this script run cpan/ExtUtils-Constant/t/Constant.t
+# which itelf invokes make, the warnings ensue.
+
+unset MAKEFLAGS
+
+
 case $# in
     0)
 	echo "runtests tty_flag ..."
@@ -61,6 +76,15 @@ fi
 
 cd t
 
+# If this is run under an old shell that doesn't automatically 
+# update PWD, then we must update it.  Otherwise, t/io/fs.t gets 
+# mixed up about what directory we are in.
+case "$PWD" in
+    '')  ;; # Do nothing if it isn't set at all.
+    */t) ;; # Leave it alone if it's properly updated.
+    *) PWD=${PWD}/t; export PWD ;;  # Otherwise, fix it.
+esac
+
 !NO!SUBS!
 
 ## In the following, dollars and backticks do need the extra backslash.