Implement a workaround for GNU mak jobserver

Compiling binutils using -flto=jobserver with GCC 11 leads to

libtool: link: gcc -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Wstack-usage=262144 -Wwrite-strings -I../../gas/../zlib -g -O2 -fprofile-generate -flto=jobserver -o as-new app.o as.o atof-generic.o compress-debug.o cond.o depend.o dwarf2dbg.o dw2gencfi.o ecoff.o ehopt.o expr.o flonum-copy.o flonum-konst.o flonum-mult.o frags.o hash.o input-file.o input-scrub.o listing.o literal.o macro.o messages.o output-file.o read.o remap.o sb.o stabs.o subsegs.o symbols.o write.o config/tc-i386.o config/obj-elf.o config/atof-ieee.o  ../opcodes/.libs/libopcodes.a ../bfd/.libs/libbfd.a -L/tmp/binutils-gdb/objdir/zlib -lz ../libiberty/libiberty.a -ldl
lto-wrapper: warning: jobserver is not available: '--jobserver-auth=' is not present in 'MAKEFLAGS'

since the '+' is missing on the recipe line in Makefiles generated by
automake.  Add the '+' to the recipe line by hand.

bfd/

	PR binutils/26792
	* configure.ac: Use GNU_MAKE_JOBSERVER.
	* aclocal.m4: Regenerated.
	* configure: Likewise.

binutils/

	PR binutils/26792
	* configure.ac: Use GNU_MAKE_JOBSERVER.
	* aclocal.m4: Regenerated.
	* configure: Likewise.

config/

	PR binutils/26792
	* jobserver.m4: New file.

gas/

	PR binutils/26792
	* configure.ac: Use GNU_MAKE_JOBSERVER.
	* aclocal.m4: Regenerated.
	* configure: Likewise.

gprof/

	PR binutils/26792
	* configure.ac: Use GNU_MAKE_JOBSERVER.
	* aclocal.m4: Regenerated.
	* configure: Likewise.

ld/

	PR binutils/26792
	* configure.ac: Use GNU_MAKE_JOBSERVER.
	* aclocal.m4: Regenerated.
	* configure: Likewise.

libctf/

	PR binutils/26792
	* configure.ac: Use GNU_MAKE_JOBSERVER.
	* aclocal.m4: Regenerated.
	* configure: Likewise.

opcodes/

	PR binutils/26792
	* configure.ac: Use GNU_MAKE_JOBSERVER.
	* aclocal.m4: Regenerated.
	* configure: Likewise.

4 files changed, 28 insertions, 0 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index a4b0ea6..80c232d 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,5 +1,12 @@
 2021-01-12  H.J. Lu  <hongjiu.lu@intel.com>
 
+	PR binutils/26792
+	* configure.ac: Use GNU_MAKE_JOBSERVER.
+	* aclocal.m4: Regenerated.
+	* configure: Likewise.
+
+2021-01-12  H.J. Lu  <hongjiu.lu@intel.com>
+
 	PR ld/27171
 	* testsuite/ld-x86-64/pe-x86-64-5.obj.bz2: New file.
 	* testsuite/ld-x86-64/pe-x86-64-5.od: Likewise.
diff --git a/ld/aclocal.m4 b/ld/aclocal.m4
index f6e87a2..d1823c1 100644
--- a/ld/aclocal.m4
+++ b/ld/aclocal.m4
@@ -1191,6 +1191,7 @@ m4_include([../config/acx.m4])
 m4_include([../config/depstand.m4])
 m4_include([../config/enable.m4])
 m4_include([../config/gettext-sister.m4])
+m4_include([../config/jobserver.m4])
 m4_include([../config/largefile.m4])
 m4_include([../config/lcmessage.m4])
 m4_include([../config/lead-dot.m4])
diff --git a/ld/configure b/ld/configure
index 4a965be..551bc72 100755
--- a/ld/configure
+++ b/ld/configure
@@ -20629,3 +20629,21 @@ if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
 $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 fi
 
+
+
+touch config.status.tmp
+if touch --reference=config.status config.status.tmp > /dev/null 2>&1; then
+  sed '/as_fn_exit 0/i \
+sed -e \"s/^\t\\\(\\\$(AM_V_CCLD)\\\)/\t+ \\\1/\" Makefile > Makefile.tmp \
+touch --reference=Makefile Makefile.tmp \
+mv Makefile.tmp Makefile \
+' config.status > config.status.tmp
+  touch --reference=config.status config.status.tmp
+  mv config.status.tmp config.status
+  chmod +x config.status
+  sed -e "s/^\t\(\$(AM_V_CCLD)\)/\t+ \1/" Makefile > Makefile.tmp
+  touch --reference=Makefile Makefile.tmp
+  mv Makefile.tmp Makefile
+else
+  rm -f config.status.tmp
+fi
diff --git a/ld/configure.ac b/ld/configure.ac
index c9c69ab..767eda8 100644
--- a/ld/configure.ac
+++ b/ld/configure.ac
@@ -597,3 +597,5 @@ AC_SUBST(pdfdir)
 
 AC_CONFIG_FILES(Makefile po/Makefile.in:po/Make-in)
 AC_OUTPUT
+
+GNU_MAKE_JOBSERVER