Merge autoconf / automake update changes from GCC.

Top level:
	Merge from GCC:
	PR bootstrap/82856
	* multilib.am: New file.  From automake.

config:
	Merge from GCC:
	PR bootstrap/82856
	* math.m4, tls.m4: Use AC_LANG_SOURCE.

zlib:
	Merge from GCC.
	PR bootstrap/82856
	* Makefile.am: Include multilib.am.
	* Makefile.in: Regenerate.

ChangeLog

@@ -1,3 +1,9 @@
+2018-10-31  Joseph Myers  <joseph@codesourcery.com>
+
+	Merge from GCC:
+	PR bootstrap/82856
+	* multilib.am: New file.  From automake.
+
 2018-09-12  Sergio Durigan Junior  <sergiodj@redhat.com>
 
 	* src-release.sh (GDB_SUPPORT_DIRS): Add "contrib".

config/ChangeLog

@@ -1,3 +1,9 @@
+2018-10-31  Joseph Myers  <joseph@codesourcery.com>
+
+	Merge from GCC:
+	PR bootstrap/82856
+	* math.m4, tls.m4: Use AC_LANG_SOURCE.
+
 2018-06-19  Simon Marchi  <simon.marchi@ericsson.com>
 
 	* override.m4 (_GCC_AUTOCONF_VERSION): Bump from 2.64 to 2.69.

config/math.m4

@@ -25,7 +25,7 @@ AC_DEFUN([GCC_CHECK_MATH_FUNC],
   AC_REQUIRE([GCC_CHECK_LIBM])
   AC_REQUIRE([GCC_CHECK_MATH_HEADERS])
   AC_CACHE_CHECK([for $1], [gcc_cv_math_func_$1],
-		 [AC_LINK_IFELSE([
+		 [AC_LINK_IFELSE([AC_LANG_SOURCE([
 #ifdef HAVE_COMPLEX_H
 #include <complex.h>
 #endif
@@ -40,7 +40,7 @@ main ()
 {
   return 0;
 }
-],
+])],
 [gcc_cv_math_func_$1=yes],
 [gcc_cv_math_func_$1=no])])
   if test $gcc_cv_math_func_$1 = yes; then

config/tls.m4

@@ -4,14 +4,14 @@ AC_DEFUN([GCC_CHECK_TLS], [
   GCC_ENABLE(tls, yes, [], [Use thread-local storage])
   AC_CACHE_CHECK([whether the target supports thread-local storage],
 		 gcc_cv_have_tls, [
-    AC_RUN_IFELSE([__thread int a; int b; int main() { return a = b; }],
+    AC_RUN_IFELSE([AC_LANG_SOURCE([__thread int a; int b; int main() { return a = b; }])],
       [dnl If the test case passed with dynamic linking, try again with
        dnl static linking, but only if static linking is supported (not
        dnl on Solaris 10).  This fails with some older Red Hat releases.
       chktls_save_LDFLAGS="$LDFLAGS"
       LDFLAGS="-static $LDFLAGS"
-      AC_LINK_IFELSE([int main() { return 0; }],
+      AC_LINK_IFELSE([AC_LANG_SOURCE([int main() { return 0; }])],
-	[AC_RUN_IFELSE([__thread int a; int b; int main() { return a = b; }],
+	[AC_RUN_IFELSE([AC_LANG_SOURCE([__thread int a; int b; int main() { return a = b; }])],
 		       [gcc_cv_have_tls=yes], [gcc_cv_have_tls=no],[])],
 	[gcc_cv_have_tls=yes])
       LDFLAGS="$chktls_save_LDFLAGS"
@@ -71,7 +71,7 @@ AC_DEFUN([GCC_CHECK_TLS], [
       [gcc_cv_have_tls=no],
       [dnl This is the cross-compiling case. Assume libc supports TLS if the
        dnl binutils and the compiler do.
-       AC_LINK_IFELSE([__thread int a; int b; int main() { return a = b; }],
+       AC_LINK_IFELSE([AC_LANG_SOURCE([__thread int a; int b; int main() { return a = b; }])],
 	 [chktls_save_LDFLAGS="$LDFLAGS"
 	  dnl Shared library options may depend on the host; this check
 	  dnl is only known to be needed for GNU/Linux.
@@ -83,8 +83,8 @@ AC_DEFUN([GCC_CHECK_TLS], [
 	  chktls_save_CFLAGS="$CFLAGS"
 	  CFLAGS="-fPIC $CFLAGS"
 	  dnl If -shared works, test if TLS works in a shared library.
-	  AC_LINK_IFELSE([int f() { return 0; }],
+	  AC_LINK_IFELSE([AC_LANG_SOURCE([int f() { return 0; }])],
-	    [AC_LINK_IFELSE([__thread int a; int b; int f() { return a = b; }],
+	    [AC_LINK_IFELSE([AC_LANG_SOURCE([__thread int a; int b; int f() { return a = b; }])],
 	      [gcc_cv_have_tls=yes],
 	      [gcc_cv_have_tls=no])],
 	    [gcc_cv_have_tls=yes])
@@ -102,7 +102,7 @@ AC_DEFUN([GCC_CHECK_CC_TLS], [
   GCC_ENABLE(tls, yes, [], [Use thread-local storage])
   AC_CACHE_CHECK([whether the target assembler supports thread-local storage],
 		 gcc_cv_have_cc_tls, [
-    AC_COMPILE_IFELSE([__thread int a; int b; int main() { return a = b; }],
+    AC_COMPILE_IFELSE([AC_LANG_SOURCE([__thread int a; int b; int main() { return a = b; }])],
       [gcc_cv_have_cc_tls=yes], [gcc_cv_have_cc_tls=no])]
     )])
   if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then

multilib.am

@@ -0,0 +1,45 @@
+## automake - create Makefile.in from Makefile.am
+
+## Copyright (C) 1994-2017 Free Software Foundation, Inc.
+## This Makefile.in is free software; the Free Software Foundation
+## gives unlimited permission to copy and/or distribute it,
+## with or without modifications, as long as this notice is preserved.
+
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+
+MULTISRCTOP =
+MULTIBUILDTOP =
+MULTIDIRS =
+MULTISUBDIR =
+MULTIDO = true
+MULTICLEAN = true
+
+# GNU Make needs to see an explicit $(MAKE) variable in the command it
+# runs to enable its job server during parallel builds.  Hence the
+# comments below.
+all-multi:
+	$(MULTIDO) $(AM_MAKEFLAGS) DO=all multi-do # $(MAKE)
+install-multi:
+	$(MULTIDO) $(AM_MAKEFLAGS) DO=install multi-do # $(MAKE)
+mostlyclean-multi:
+	$(MULTICLEAN) $(AM_MAKEFLAGS) DO=mostlyclean multi-clean # $(MAKE)
+clean-multi:
+	$(MULTICLEAN) $(AM_MAKEFLAGS) DO=clean multi-clean # $(MAKE)
+distclean-multi:
+	$(MULTICLEAN) $(AM_MAKEFLAGS) DO=distclean multi-clean # $(MAKE)
+maintainer-clean-multi:
+	$(MULTICLEAN) $(AM_MAKEFLAGS) DO=maintainer-clean multi-clean # $(MAKE)
+
+.MAKE .PHONY: all-multi clean-multi distclean-multi install-am \
+	      install-multi maintainer-clean-multi mostlyclean-multi
+
+install-exec-local: install-multi
+
+all-local: all-multi
+mostlyclean-local: mostlyclean-multi
+clean-local: clean-multi
+distclean-local: distclean-multi
+maintainer-clean-local: maintainer-clean-multi

zlib/ChangeLog.bin-gdb

@@ -1,3 +1,10 @@
+2018-10-31  Joseph Myers  <joseph@codesourcery.com>
+
+	Merge from GCC.
+	PR bootstrap/82856
+	* Makefile.am: Include multilib.am.
+	* Makefile.in: Regenerate.
+
 2018-06-21  Alan Modra  <amodra@gmail.com>
 
 	* Makefile.in: Regenerate.

zlib/Makefile.am

@@ -59,3 +59,5 @@ AM_MAKEFLAGS = \
 	"PICFLAG=$(PICFLAG)" \
 	"RANLIB=$(RANLIB)" \
 	"DESTDIR=$(DESTDIR)"
+
+include $(top_srcdir)/../multilib.am

zlib/Makefile.in

@@ -245,7 +245,8 @@ am__DIST_COMMON = $(srcdir)/Makefile.in $(top_srcdir)/../compile \
 	$(top_srcdir)/../config.guess $(top_srcdir)/../config.sub \
 	$(top_srcdir)/../depcomp $(top_srcdir)/../install-sh \
 	$(top_srcdir)/../ltmain.sh $(top_srcdir)/../missing \
-	$(top_srcdir)/../mkinstalldirs ChangeLog README
+	$(top_srcdir)/../mkinstalldirs $(top_srcdir)/../multilib.am \
+	ChangeLog README
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 distdir = $(PACKAGE)-$(VERSION)
 top_distdir = $(distdir)
@@ -441,13 +442,19 @@ AM_MAKEFLAGS = \
 	"RANLIB=$(RANLIB)" \
 	"DESTDIR=$(DESTDIR)"
 
+MULTISRCTOP = 
+MULTIBUILDTOP = 
+MULTIDIRS = 
+MULTISUBDIR = 
+MULTIDO = true
+MULTICLEAN = true
 all: all-am
 
 .SUFFIXES:
 .SUFFIXES: .c .lo .o .obj
 am--refresh: Makefile
 	@:
-$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am $(top_srcdir)/../multilib.am $(am__configure_deps)
 	@for dep in $?; do \
 	  case '$(am__configure_deps)' in \
 	    *$$dep*) \
@@ -469,6 +476,7 @@ Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
 	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__depfiles_maybe)'; \
 	    cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__depfiles_maybe);; \
 	esac;
+$(top_srcdir)/../multilib.am $(am__empty):
 
 $(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
 	$(SHELL) ./config.status --recheck
@@ -1030,7 +1038,7 @@ distcleancheck: distclean
 	       exit 1; } >&2
 check-am: all-am
 check: check-am
-all-am: Makefile $(LIBRARIES) $(LTLIBRARIES)
+all-am: Makefile $(LIBRARIES) $(LTLIBRARIES) all-local
 installdirs:
 	for dir in "$(DESTDIR)$(toolexeclibdir)"; do \
 	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
@@ -1067,15 +1075,16 @@ maintainer-clean-generic:
 	@echo "it deletes files that may require special tools to rebuild."
 clean: clean-am
 
-clean-am: clean-generic clean-libtool clean-noinstLTLIBRARIES \
+clean-am: clean-generic clean-libtool clean-local \
-	clean-toolexeclibLIBRARIES mostlyclean-am
+	clean-noinstLTLIBRARIES clean-toolexeclibLIBRARIES \
+	mostlyclean-am
 
 distclean: distclean-am
 	-rm -f $(am__CONFIG_DISTCLEAN_FILES)
 	-rm -rf ./$(DEPDIR)
 	-rm -f Makefile
 distclean-am: clean-am distclean-compile distclean-generic \
-	distclean-libtool distclean-tags
+	distclean-libtool distclean-local distclean-tags
 
 dvi: dvi-am
 
@@ -1095,7 +1104,7 @@ install-dvi: install-dvi-am
 
 install-dvi-am:
 
-install-exec-am: install-toolexeclibLIBRARIES
+install-exec-am: install-exec-local install-toolexeclibLIBRARIES
 
 install-html: install-html-am
 
@@ -1122,12 +1131,13 @@ maintainer-clean: maintainer-clean-am
 	-rm -rf $(top_srcdir)/autom4te.cache
 	-rm -rf ./$(DEPDIR)
 	-rm -f Makefile
-maintainer-clean-am: distclean-am maintainer-clean-generic
+maintainer-clean-am: distclean-am maintainer-clean-generic \
+	maintainer-clean-local
 
 mostlyclean: mostlyclean-am
 
 mostlyclean-am: mostlyclean-compile mostlyclean-generic \
-	mostlyclean-libtool
+	mostlyclean-libtool mostlyclean-local
 
 pdf: pdf-am
 
@@ -1141,28 +1151,56 @@ uninstall-am: uninstall-toolexeclibLIBRARIES
 
 .MAKE: install-am install-strip
 
-.PHONY: CTAGS GTAGS TAGS all all-am am--refresh check check-am clean \
+.PHONY: CTAGS GTAGS TAGS all all-am all-local am--refresh check \
-	clean-cscope clean-generic clean-libtool \
+	check-am clean clean-cscope clean-generic clean-libtool \
-	clean-noinstLTLIBRARIES clean-toolexeclibLIBRARIES cscope \
+	clean-local clean-noinstLTLIBRARIES clean-toolexeclibLIBRARIES \
-	cscopelist-am ctags ctags-am dist dist-all dist-bzip2 \
+	cscope cscopelist-am ctags ctags-am dist dist-all dist-bzip2 \
 	dist-gzip dist-lzip dist-shar dist-tarZ dist-xz dist-zip \
 	distcheck distclean distclean-compile distclean-generic \
-	distclean-libtool distclean-tags distcleancheck distdir \
+	distclean-libtool distclean-local distclean-tags \
-	distuninstallcheck dvi dvi-am html html-am info info-am \
+	distcleancheck distdir distuninstallcheck dvi dvi-am html \
-	install install-am install-data install-data-am install-dvi \
+	html-am info info-am install install-am install-data \
-	install-dvi-am install-exec install-exec-am install-html \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-exec-local install-html \
 	install-html-am install-info install-info-am install-man \
 	install-pdf install-pdf-am install-ps install-ps-am \
 	install-strip install-toolexeclibLIBRARIES installcheck \
 	installcheck-am installdirs maintainer-clean \
-	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	maintainer-clean-generic maintainer-clean-local mostlyclean \
-	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
-	tags tags-am uninstall uninstall-am \
+	mostlyclean-local pdf pdf-am ps ps-am tags tags-am uninstall \
-	uninstall-toolexeclibLIBRARIES
+	uninstall-am uninstall-toolexeclibLIBRARIES
 
 .PRECIOUS: Makefile
 
 
+# GNU Make needs to see an explicit $(MAKE) variable in the command it
+# runs to enable its job server during parallel builds.  Hence the
+# comments below.
+all-multi:
+	$(MULTIDO) $(AM_MAKEFLAGS) DO=all multi-do # $(MAKE)
+install-multi:
+	$(MULTIDO) $(AM_MAKEFLAGS) DO=install multi-do # $(MAKE)
+mostlyclean-multi:
+	$(MULTICLEAN) $(AM_MAKEFLAGS) DO=mostlyclean multi-clean # $(MAKE)
+clean-multi:
+	$(MULTICLEAN) $(AM_MAKEFLAGS) DO=clean multi-clean # $(MAKE)
+distclean-multi:
+	$(MULTICLEAN) $(AM_MAKEFLAGS) DO=distclean multi-clean # $(MAKE)
+maintainer-clean-multi:
+	$(MULTICLEAN) $(AM_MAKEFLAGS) DO=maintainer-clean multi-clean # $(MAKE)
+
+.MAKE .PHONY: all-multi clean-multi distclean-multi install-am \
+	      install-multi maintainer-clean-multi mostlyclean-multi
+
+install-exec-local: install-multi
+
+all-local: all-multi
+mostlyclean-local: mostlyclean-multi
+clean-local: clean-multi
+distclean-local: distclean-multi
+maintainer-clean-local: maintainer-clean-multi
+
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
 .NOEXPORT: