sync libiberty from gcc

config/
	Sync from gcc
	2020-07-15  H.J. Lu  <hjl.tools@gmail.com>
	PR bootstrap/96202
	* cet.m4 (GCC_CET_HOST_FLAGS): Don't enable CET without CET
	support in stage1 nor for build support.
libiberty/
	* configure: Regenerate.

	Sync from gcc
	2020-09-08  Alan Modra  <amodra@gmail.com>
	* d-demangle.c: Include limits.h.
	(ULONG_MAX, UINT_MAX): Provide fall-back definition.
	(dlang_number): Simplify and correct overflow test.  Only
	write *ret on returning non-NULL.  Make "ret" an unsigned long*.
	Only succeed for result of [0,UINT_MAX].
	(dlang_decode_backref): Simplify and correct overflow test.
	Only write *ret on returning non-NULL.  Only succeed for
	result [1,MAX_LONG].
	(dlang_backref): Remove now unnecessary range check.
	(dlang_symbol_name_p): Likewise.
	(string_need): Take a size_t n arg, and use size_t tem.
	(string_append): Use size_t n.
	(string_appendn, string_prependn): Take a size_t n arg.
	(TEMPLATE_LENGTH_UNKNOWN): Define as -1UL.
	(dlang_lname, dlang_parse_template): Take an unsigned long len
	arg.
	(dlang_symbol_backref, dlang_identifier, dlang_parse_integer),
	(dlang_parse_integer, dlang_parse_string),
	(dlang_parse_arrayliteral, dlang_parse_assocarray),
	(dlang_parse_structlit, dlang_parse_tuple),
	(dlang_template_symbol_param, dlang_template_args): Use
	unsigned long variables.
	* testsuite/d-demangle-expected: Add new tests.

	2020-08-04  Iain Buclaw  <ibuclaw@gdcproject.org>
	* d-demangle.c (dlang_function_args): Handle 'in' and 'in ref'
	parameter storage classes.
	(dlang_type): Remove identifier type.
	* testsuite/d-demangle-expected: Update tests.

	2020-08-03  Richard Biener  <rguenther@suse.de>
	PR lto/96385
	* simple-object-elf.c
	(simple_object_elf_copy_lto_debug_sections): Localize global
	UNDEFs and reuse the prevailing name.

	2020-07-10  Ian Lance Taylor  <iant@golang.org>
	PR demangler/96143
	* cp-demangle.c (d_lambda): Don't add substitution candidate.
	* testsuite/demangle-expected: Update a few existing test cases
	accordingly, and add a new test case.

	2020-07-04  Jason Merrill  <jason@redhat.com>
	* cp-demangle.c (cplus_demangle_operators): Add di, dx, dX.
	(d_expression_1): Handle di and dX.
	(is_designated_init, d_maybe_print_designated_init): New.
	(d_print_comp_inner): Use d_maybe_print_designated_init.
	* testsuite/demangle-expected: Add designator tests.

	2020-06-25  Nick Clifton  <nickc@redhat.com>
	* bsearch.c (bsearch): Remove use of register keyword.
	* bsearch_r.c (bsearch_r): Likewise.

2 files changed, 26 insertions, 5 deletions

diff --git a/config/ChangeLog b/config/ChangeLog
index ba1fc7f..a6454d3 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,11 @@
+2020-09-08  Alan Modra  <amodra@gmail.com>
+
+	Sync from gcc
+	2020-07-15  H.J. Lu  <hjl.tools@gmail.com>
+	PR bootstrap/96202
+	* cet.m4 (GCC_CET_HOST_FLAGS): Don't enable CET without CET
+	support in stage1 nor for build support.
+
 2020-07-30  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* largefile.m4 (ACX_LARGEFILE) <sparc-*-solaris*|i?86-*-solaris*>:
diff --git a/config/cet.m4 b/config/cet.m4
index 911fbd4..c67fb4f 100644
--- a/config/cet.m4
+++ b/config/cet.m4
@@ -13,7 +13,7 @@ case "$host" in
     case "$enable_cet" in
       auto)
 	# Check if target supports multi-byte NOPs
-	# and if assembler supports CET insn.
+	# and if compiler and assembler support CET insn.
 	cet_save_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS -fcf-protection"
 	AC_COMPILE_IFELSE(
@@ -70,7 +70,7 @@ case "$host" in
     case "$enable_cet" in
       auto)
 	# Check if target supports multi-byte NOPs
-	# and if assembler supports CET insn.
+	# and if compiler and assembler support CET.
 	AC_COMPILE_IFELSE(
 	 [AC_LANG_PROGRAM(
 	  [],
@@ -85,13 +85,26 @@ asm ("setssbsy");
 	 [enable_cet=no])
 	;;
       yes)
-	# Check if assembler supports CET.
+	# Check if compiler and assembler support CET.
 	AC_COMPILE_IFELSE(
 	 [AC_LANG_PROGRAM(
 	  [],
 	  [asm ("setssbsy");])],
-	 [],
-	 [AC_MSG_ERROR([assembler with CET support is required for --enable-cet])])
+	 [support_cet=yes],
+	 [support_cet=no])
+	if test $support_cet = "no"; then
+	  if test x$enable_bootstrap != xno \
+	     && test -z "${with_build_subdir}" \
+	     && (test ! -f ../stage_current \
+	         || test `cat ../stage_current` != "stage1"); then
+	    # Require CET support only for the final GCC build.
+	    AC_MSG_ERROR([compiler and assembler with CET support are required for --enable-cet])
+	  else
+	    # Don't enable CET without CET support for non-bootstrap
+	    # build, in stage1 nor for build support.
+	    enable_cet=no
+	  fi
+	fi
 	;;
     esac
     CFLAGS="$cet_save_CFLAGS"