Add --disable-tm-clone-registry libgcc configure option.

This patch adds libgcc configuration option to disable TM clone 
registry. This option helps to reduce code size for embedded targets 
which do not need transactional memory support.

	gcc/
	* doc/install.texi: Document --disable-tm-clone-registry.
	libgcc/
	* Makefile.in (USE_TM_CLONE_REGISTRY): New.
	(CRTSTUFF_CFLAGS): Use USE_TM_CLONE_REGISTRY.
	* configure.ac: Add --disable-tm-clone-registry option.
	* configure: Regenerate.

From-SVN: r272769

gcc/ChangeLog

@@ -1,3 +1,7 @@
+2019-06-27  Ilia Diachkov  <ilia.diachkov@optimitech.com>
+
+	* doc/install.texi: Document --disable-tm-clone-registry.
+
 2019-06-27  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/91024

gcc/doc/install.texi

@@ -1284,6 +1284,11 @@ assumptions made by the configure test are incorrect.
 Specify that the target does not support TLS.
 This is an alias for @option{--enable-tls=no}.
 
+@item --disable-tm-clone-registry
+Disable TM clone registry in libgcc. It is enabled in libgcc by default.
+This option helps to reduce code size for embedded targets which do
+not use transactional memory.
+
 @item --with-cpu=@var{cpu}
 @itemx --with-cpu-32=@var{cpu}
 @itemx --with-cpu-64=@var{cpu}

libgcc/ChangeLog

@@ -1,3 +1,10 @@
+2019-06-27  Ilia Diachkov  <ilia.diachkov@optimitech.com>
+
+	* Makefile.in (USE_TM_CLONE_REGISTRY): New.
+	(CRTSTUFF_CFLAGS): Use USE_TM_CLONE_REGISTRY.
+	* configure.ac: Add --disable-tm-clone-registry option.
+	* configure: Regenerate.
+
 2019-06-27  Martin Liska  <mliska@suse.cz>
 
 	* libgcov-driver-system.c (gcov_exit_open_gcda_file): Remove obviously

libgcc/Makefile.in

@@ -259,6 +259,8 @@ PICFLAG = @PICFLAG@
 
 CET_FLAGS = @CET_FLAGS@
 
+USE_TM_CLONE_REGISTRY = @use_tm_clone_registry@
+
 # Defined in libgcc2.c, included only in the static library.
 LIB2FUNCS_ST = _eprintf __gcc_bcmp
 
@@ -299,7 +301,7 @@ CRTSTUFF_CFLAGS = -O2 $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) -g0 \
   $(NO_PIE_CFLAGS) -finhibit-size-directive -fno-inline -fno-exceptions \
   -fno-zero-initialized-in-bss -fno-toplevel-reorder -fno-tree-vectorize \
   -fbuilding-libgcc -fno-stack-protector $(FORCE_EXPLICIT_EH_REGISTRY) \
-  $(INHIBIT_LIBC_CFLAGS)
+  $(INHIBIT_LIBC_CFLAGS) $(USE_TM_CLONE_REGISTRY)
 
 # Extra flags to use when compiling crt{begin,end}.o.
 CRTSTUFF_T_CFLAGS =

libgcc/configure

@@ -604,6 +604,7 @@ vis_hide
 solaris_ld_v2_maps
 real_host_noncanonical
 accel_dir_suffix
+use_tm_clone_registry
 force_explicit_eh_registry
 CET_FLAGS
 fixed_point
@@ -712,6 +713,7 @@ enable_decimal_float
 with_system_libunwind
 enable_cet
 enable_explicit_exception_frame_registration
+enable_tm_clone_registry
 with_glibc_version
 enable_tls
 with_gcc_major_version_only
@@ -1355,6 +1357,7 @@ Optional Features:
                           register exception tables explicitly at module
                           start, for use e.g. for compatibility with
                           installations without PT_GNU_EH_FRAME support
+  --disable-tm-clone-registry    disable TM clone registry
   --enable-tls            Use thread-local storage [default=yes]
 
 Optional Packages:
@@ -4953,6 +4956,18 @@ fi
 
 
 
+# Check whether --enable-tm-clone-registry was given.
+if test "${enable_tm_clone_registry+set}" = set; then :
+  enableval=$enable_tm_clone_registry;
+use_tm_clone_registry=
+if test "$enable_tm_clone_registry" = no; then
+  use_tm_clone_registry=-DUSE_TM_CLONE_REGISTRY=0
+fi
+
+fi
+
+
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking if the linker ($LD) is GNU ld" >&5
 $as_echo_n "checking if the linker ($LD) is GNU ld... " >&6; }
 if ${acl_cv_prog_gnu_ld+:} false; then :

libgcc/configure.ac

@@ -261,6 +261,16 @@ fi
 ])
 AC_SUBST([force_explicit_eh_registry])
 
+AC_ARG_ENABLE([tm-clone-registry],
+[  --disable-tm-clone-registry    disable TM clone registry],
+[
+use_tm_clone_registry=
+if test "$enable_tm_clone_registry" = no; then
+  use_tm_clone_registry=-DUSE_TM_CLONE_REGISTRY=0
+fi
+])
+AC_SUBST([use_tm_clone_registry])
+
 AC_LIB_PROG_LD_GNU
 
 AC_MSG_CHECKING([for thread model used by GCC])