From: Martin Liska <mliska@suse.cz>
Date: Mon, 26 Oct 2020 17:56:52 +0000 (+0100)
Subject: lto: no sub-make when --jobserver-auth= is missing
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=119295372f3717e78edd43a8ae1a2003d0fcc0e6;p=gcc.git

lto: no sub-make when --jobserver-auth= is missing

We newly correctly detect that a job server is not active for
a LTO linking:

lto-wrapper: warning: jobserver is not available: '--jobserver-auth=' is not present in 'MAKEFLAGS'

In that situation we should not call make -f abc.mk as it can leed
to N^2 LTRANS units.

gcc/ChangeLog:

	* lto-wrapper.c (run_gcc): Do not use sub-make when jobserver is
	not detected properly.
---

diff --git a/gcc/lto-wrapper.c b/gcc/lto-wrapper.c
index b2af3caa021..fe10f4f4fbb 100644
--- a/gcc/lto-wrapper.c
+++ b/gcc/lto-wrapper.c
@@ -1582,7 +1582,11 @@ run_gcc (unsigned argc, char *argv[])
     {
       const char *jobserver_error = jobserver_active_p ();
       if (jobserver && jobserver_error != NULL)
-	warning (0, jobserver_error);
+	{
+	  warning (0, jobserver_error);
+	  parallel = 0;
+	  jobserver = 0;
+	}
       else if (!jobserver && jobserver_error == NULL)
 	{
 	  parallel = 1;