Disable inheritance of jobserver FDs for recursive make. BZ #1827850

Backport upstream git d79fe162c009788888faaf0317253b6f0cac7092
https://bugzilla.redhat.com/show_bug.cgi?id=1827850
https://savannah.gnu.org/bugs/?58232
Remove on next make rebase

make-4.3-cloexec.patch

@@ -0,0 +1,36 @@
+From d79fe162c009788888faaf0317253b6f0cac7092 Mon Sep 17 00:00:00 2001
+From: Kevin Buettner <kevinb@redhat.com>
+Date: Thu, 23 Apr 2020 17:05:34 -0400
+Subject: [SV 58232] Disable inheritance of jobserver FDs for recursive make
+
+A parent make will invoke a sub-make with close-on-exec disabled for
+the jobserver pipe FDs.  Force close-on-exec to be to be enabled in
+the sub-make so the pipe is not always passed to child jobs.
+
+I have a test case which, when invoked with a suitable -j switch,
+will hang if the recipe inherits the jobserver pipe.  This test case
+was inspired by a real world case in which testing GDB on Fedora
+would hang due to some poorly written test GDB cases having been
+passed the jobserver file descriptors.
+
+* src/posixos.c (jobserver_parse_auth): Call fd_noinherit() for
+jobserver pipe descriptors.
+
+Copyright-paperwork-exempt: yes
+
+diff --git a/src/posixos.c b/src/posixos.c
+index 525f292c..eab175a4 100644
+--- a/src/posixos.c
++++ b/src/posixos.c
+@@ -145,6 +145,11 @@ jobserver_parse_auth (const char *auth)
+   /* When using pselect() we want the read to be non-blocking.  */
+   set_blocking (job_fds[0], 0);
+ 
++  /* By default we don't send the job pipe FDs to our children.
++     See jobserver_pre_child() and jobserver_post_child().  */
++  fd_noinherit (job_fds[0]);
++  fd_noinherit (job_fds[1]);
++
+   return 1;
+ }
+ 

make.spec

@@ -3,7 +3,7 @@ Summary: A GNU tool which simplifies the build process for users
 Name: make
 Epoch: 1
 Version: 4.3
-Release: 2%{?dist}
+Release: 3%{?dist}
 License: GPLv3+
 URL: http://www.gnu.org/software/make/
 Source: ftp://ftp.gnu.org/gnu/make/make-%{version}.tar.gz
@@ -18,6 +18,11 @@ Patch1: make-4.0-noclock_gettime.patch
 # BZs #142691, #17374
 Patch2: make-4.3-j8k.patch
 
+# https://bugzilla.redhat.com/show_bug.cgi?id=1827850
+# https://savannah.gnu.org/bugs/?58232
+# Remove on next make rebase
+Patch3: make-4.3-cloexec.patch
+
 # autoreconf
 BuildRequires: autoconf, automake, gettext-devel
 BuildRequires: procps
@@ -75,6 +80,9 @@ echo ============END TESTING===========
 %{_includedir}/gnumake.h
 
 %changelog
+* Wed Jul 29 2020 DJ Delorie <dj@redhat.com> - 1:4.3-3
+- Disable inheritance of jobserver FDs for recursive make. BZ #1827850
+
 * Tue Jul 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1:4.3-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild