Move shlib support to toplevel libgcc

	gcc:
	PR translation/45116
	* Makefile.in (slibdir): Remove, don't export.
	(SHLIB_NM_FLAGS): Remove.
	(libgcc.mvars): Don't emit SHLIB_LINK, SHLIB_INSTALL,
	SHLIB_DLLDIR, SHLIB_EXT, SHLIB_MKMAP, SHLIB_MKMAP_OPTS,
	SHLIB_MAPFILES, SHLIB_NM_FLAGS.
	(DRIVER_DEFINES): Test SHLIB instead of SHLIB_LINK.
	(gcc.o): Pass SHLIB instead of SHLIB_LINK.
	(gccspec.o): Likewise.
	(installdirs): Don't create $(DESTDIR)$(slibdir).
	* configure.ac (slibdir): Remove.
	* configure: Regenerate.
	* libgcc-libsystem.ver: Move to ../libgcc/config.
	* mkmap-flat.awk, mkmap-symver.awk: Move to ../libgcc.
	* config/libgcc-glibc.ver: Move to ../libgcc/config.
	* config/t-libunwind (SHLIB_LC): Remove.
	* config/t-linux (SHLIB_MAPFILES): Remove.
	* config/t-slibgcc-dummy: Rename to config/t-slibgcc.
	* config/t-slibgcc-elf-ver: Remove.
	* config/t-slibgcc-libgcc, config/t-slibgcc-nolc-override: Move to
	../libgcc/config.
	* config/alpha/libgcc-alpha-ldbl.ver, config/alpha/t-linux: Move
	to ../libgcc/config/alpha.
	* config/alpha/t-vms (shlib_version, SHLIB_EXT, SHLIB_OBJS,
	SHLIB_NAME, SHLIB_MULTILIB, SHLIB_INSTALL, SHLIB_SYMVEC,
	SHLIB_SYMVECX2, SHLIB_LINK): Remove.
	* config/arm/libgcc-bpabi.ver: Move to ../libgcc/config/arm.
	* config/arm/t-bpabi (SHLIB_MAPFILES): Remove.
	* config/arm/t-netbsd (SHLIB_EXT, SHLIB_NAME, SHLIB_SONAME,
	SHLIB_OBJS, SHLIB_LINK, SHLIB_INSTALL): Remove.
	* config/arm/t-symbian (SHLIB_LC): Remove.
	* config/bfin/libgcc-bfin.ver: Move to
	../libgcc/config/bfin/libgcc-glibc.ver.
	* config/bfin/t-bfin-linux (SHLIB_MAPFILES): Remove.
	* config/c6x/libgcc-c6xeabi.ver: Move to
	../libgcc/config/c6x/libgcc-eabi.ver.
	* config/c6x/t-c6x-elf (SHLIB_MAPFILES): Remove.
	* config/cris/libgcc.ver: Move to
	../libgcc/config/cris/libgcc-glibc.ver.
	* config/cris/t-linux (SHLIB_MAPFILES): Remove.
	* config/frv/libgcc-frv.ver: Move to ../libgcc/config/frv.
	* config/frv/t-linux (SHLIB_MAPFILES): Remove.
	* config/i386/darwin-libgcc.10.4.ver: Move to
	../libgcc/config/i386/libgcc-darwin.10.4.ver.
	* config/i386/darwin-libgcc.10.5.ver: Move to
	../libgcc/config/i386/libgcc-darwin.10.5.ver.
	* config/i386/libgcc-glibc.ver: Move to ../libgcc/config/i386.
	* config/i386/t-cygming (SHLIB_EXT, SHLIB_IMPLIB, SHLIB_SOVERSION,
	SHLIB_SONAME, SHLIB_MAP, SHLIB_OBJS, SHLIB_DIR, SHLIB_SLIBDIR_QUAL)
	SHLIB_PTHREAD_CFLAG, SHLIB_PTHREAD_LDFLAG, SHLIB_LINK,
	SHLIB_INSTALL, SHLIB_MKMAP, SHLIB_MKMAP_OPTS, SHLIB_MAPFILES):
	Remove.
	* config/i386/t-cygwin (SHLIB_LC, SHLIB_EH_EXTENSION,
	SHLIB_IMPLIB, SHLIB_SONAME, SHLIB_MKMAP_OPTS): Remove.
	* config/i386/t-dlldir, config/i386/t-dlldir-x: Move to
	../libgcc/config/i386.
	* config/i386/t-dw2-eh, config/i386/t-sjlj-eh: Move to
	../libgcc/config/i386.
	* config/i386/t-linux: Move to ../libgcc/config/i386.
	* config/i386/t-mingw-pthread: Move to ../libgcc/config/i386.
	* config/i386/t-mingw-w32 (SHLIB_LC): Remove.
	* config/i386/t-mingw-w64: Likewise.
	* config/i386/t-mingw32: Remove.
	* config/ia64/libgcc-glibc.ver, config/ia64/libgcc-ia64.ver: Move
	to ../libgcc/config/ia64.
	* config/ia64/t-glibc: Remove.
	* config/ia64/t-hpux (SHLIB_EXT, SHLIB_LINK, SHLIB_INSTALL): Remove.
	* config/ia64/t-ia64 (SHLIB_MAPFILES): Remove.
	* config/ia64/t-vms (shlib_version, SHLIB_EXT, SHLIB_OBJS,
	SHLIB_NAME, SHLIB_MULTILIB, SHLIB_INSTALL, SHLIB_LINK): Remove.
	* config/ia64/vms_symvec_libgcc_s.opt: Remove.
	* config/m32r/libgcc-glibc.ver: Move to ../libgcc/config/m32r.
	* config/m32r/t-linux (SHLIB_MAPFILES): Remove.
	* config/m68k/t-slibgcc-elf-ver: Move to ../libgcc/config/m68k.
	* config/mips/t-libgcc-mips16 (SHLIB_MAPFILES): Remove.
	* config/pa/t-hpux-shlib: Move to ../libgcc/config/pa/t-slibgcc-hpux.
	* config/pa/t-slibgcc-dwarf-ver, config/pa/t-slibgcc-sjsj-ver:
	Move to ../libgcc/config/pa.
	* config/rs6000/darwin-libgcc.10.4.ver: Move to
	../libgcc/config/rs6000/libgcc-darwin.10.4.ver.
	* config/rs6000/darwin-libgcc.10.5.ver: Move to
	../libgcc/config/rs6000/libgcc-darwin.10.5.ver.
	* config/rs6000/t-aix43 (SHLIB_EXT, SHLIB_LINK, SHLIB_INSTALL,
	SHLIB_LIBS, SHLIB_MKMAP, SHLIB_NM_FLAGS, AR_FLAGS_FOR_TARGET): Remove.
	* config/rs6000/t-aix52: Likewise.
	* config/sh/libgcc-excl.ver, config/sh/libgcc-glibc.ver: Move to
	../libgcc/config/sh.
	* config/sparc/libgcc-sparc-glibc.ver: Move to
	../libgcc/config/sparc/libgcc-glibc.ver.
	* config/sparc/t-linux: Move to ../libgcc/config/sparc.
	* config/xtensa/t-linux (SHLIB_MAPFILES): Remove.
	* config/xtensa/libgcc-xtensa.ver: Move to
	../libgcc/config/xtensa/libgcc-glibc.ver.
	* config.gcc (*-*-freebsd*): Replace t-slibgcc-elf-ver with
	t-slibgcc in tmake_file.
	Remove t-slibgcc-nolc-override for *-*-freebsd[34],
	*-*-freebsd[34].* with pthreads.
	(*-*-linux*, frv-*-*linux*, *-*-kfreebsd*-gnu,
	*-*-knetbsd*-gnu, *-*-gnu*, *-*-kopensolaris*-gnu): Replace
	t-slibgcc-elf-ver with t-slibgcc in tmake_file.
	(*-*-netbsd*): Likewise.
	(*-*-solaris2*): Replace t-slibgcc-dummy with t-slibgcc in tmake_file.
	(*-*-*vms*): Add t-slibgcc to tmake_file.
	(alpha*-*-linux*): Remove alpha/t-linux from tmake_file.
	(alpha*-dec-osf5.1*): Replace t-slibgcc-dummy with t-slibgcc in
	tmake_file.
	(arm*-*-linux*): Remove t-slibgcc-libgcc from tmake_file for
	arm*-*-linux-*eabi.
	(bfin*-linux-uclibc*): Replace t-slibgcc-dummy with t-slibgcc in
	tmake_file.
	(crisv32-*-linux*, cris-*-linux*): Likewise.
	(hppa*-*-linux*): Remove t-slibgcc-libgcc, pa/t-slibgcc-sjlj-ver,
	pa/t-slibgcc-dwarf-ver from tmake_file.
	(hppa[12]*-*-hpux10*): Replace pa/t-hpux-shlib with t-slibgcc in
	tmake_file.
	Remove pa/t-slibgcc-sjlj-ver, pa/t-slibgcc-dwarf-ver from tmake_file.
	(hppa*64*-*-hpux11*): Likewise.
	(hppa[12]*-*-hpux11*): Likewise.
	(i[34567]86-*-darwin*): Replace t-slibgcc-dummy in t-slibgcc in
	tmake_file.
	(x86_64-*-darwin*): Likewise.
	(i[34567]86-*-cygwin*): Remove tmake_eh_file, tmake_dlldir_file.
	Add t-slibgcc to tmake_file.
	(i[34567]86-*-mingw*, x86_64-*-mingw*): Likewise.
	Remove i386/t-mingw32 from tmake_file unless x86_64-w64-*,
	i[34567]86-w64-*.
	Remove i386/t-mingw-pthread from tmake_file.
	(ia64*-*-linux*): Remove ia64/t-glibc from tmake_file.
	(ia64*-*-hpux*): Add t-slibgcc to tmake_file.
	(ia64-hp-*vms*): Likewise.
	(m32r-*-linux*): Replace t-slibgcc-elf-ver with t-slibgcc in
	tmake_file.
	(m32rle-*-linux*): Likewise.
	(m68k-*-linux*): Remove m68k/t-slibgcc-elf-ver from tmake_file.
	(microblaze*-linux*): Remove t-slibgcc-elf-ver,
	t-slibgcc-nolc-override from tmake_file.
	(mips-sgi-irix6.5*): Replace t-slibgcc-dummy with t-slibgcc in
	tmake_file.
	(powerpc-*-darwin*): Likewise.
	(powerpc64-*-darwin*): Likewise.
	(powerpc-*-freebsd*): Remove t-slibgcc-libgcc from tmake_file.
	(powerpc-*-linux*, powerpc64-*-linux*): Likewise.
	(rs6000-ibm-aix4.[3456789]*, powerpc-ibm-aix4.[3456789]*): Add
	t-slibgcc to tmake_file.
	(rs6000-ibm-aix5.1.*, powerpc-ibm-aix5.1.*): Likewise.
	(rs6000-ibm-aix5.2.*, powerpc-ibm-aix5.2.*): Likewise.
	(rs6000-ibm-aix5.3.*, powerpc-ibm-aix5.3.*): Likewise.
	(rs6000-ibm-aix[6789].*, powerpc-ibm-aix[6789].*): Likewise.
	(sparc-*-linux*): Remove sparc/t-linux from tmake_file.
	(sparc64-*-linux*): Likewise.
	(tic6x-*-uclinux): Replace t-slibgcc-elf-ver with t-slibgcc in
	tmake_file.
	(i[34567]86-*-linux*, x86_64-*-linux*, i[34567]86-*-kfreebsd*-gnu,
	x86_64-*-kfreebsd*-gnu, i[34567]86-*-gnu*): Remove i386/t-linux
	from tmake_file.

	gcc/cp:
	* Make-lang.in (g++spec.o): Pass SHLIB instead of SHLIB_LINK.

	gcc/fortran:
	* Makef-lang.in (gfortranspec.o): Pass SHLIB instead of SHLIB_LINK.

	gcc/go:
	* Make-lang.in (gospec.o): Pass SHLIB instead of SHLIB_LINK.

	gcc/java:
	* Make-lang.in (jvspec.o): Pass SHLIB instead of SHLIB_LINK.

	libgcc:
	* Makefile.in (SHLIB_NM_FLAGS): Set.
	* mkmap-flat.awk, mkmap-symver.awk: New files.
	* configure.ac (libgcc_cv_lib_sjlj_exceptions): Check for SjLj
	exceptions.
	* configure: Regenerate.
	* config/libgcc-glibc.ver: New file.
	* config/libgcc-libsystem.ver: New file.
	* config/t-libunwind (SHLIB_LC): Set.
	* config/t-linux: New file.
	* config/t-slibgcc (INSTALL_SHLIB): New.
	(SHLIB_INSTALL): Use it.
	* config/t-slibgcc-darwin (SHLIB_MKMAP): Use $(srcdir) to refer
	to mkmap-symver.awk.
	(SHLIB_MAPFILES): Don't append, adapt pathname.
	(SHLIB_VERPFX): Set.
	* config/t-slibgcc-elf-ver (SHLIB_MKMAP): Use $(srcdir) to refer
	to mkmap-symver.awk.
	* config/t-slibgcc-gld-nover, config/t-slibgcc-hpux,
	config/t-slibgcc-libgcc, config/t-slibgcc-vms: New files.
	* config/alpha/libgcc-alpha-ldbl.ver, config/alpha/t-linux: New files.
	* config/alpha/t-slibgcc-osf (SHLIB_MKMAP): Use $(srcdir) to refer
	to mkmap-flat.awk.
	* config/arm/t-bpabi (SHLIB_MAPFILES): Set.
	* config/bfin/libgcc-glibc.ver, config/bfin/t-linux: New files.
	* config/c6x/libgcc-eabi.ver, config/c6x/t-elf: New files.
	* config/cris/libgcc-glibc.ver, config/cris/t-linux: New files.
	* config/frv/libgcc-frv.ver, config/frv/t-linux: New files.
	* config/i386/libgcc-darwin.10.4.ver,
	config/i386/libgcc-darwin.10.5.ver, config/i386/libgcc-glibc.ver:
	New files.
	* config/i386/t-darwin: Remove.
	* config/i386/t-darwin64: Likewise.
	* config/i386/t-dw2-eh, config/i386/t-sjlj-eh: New files.
	* config/i386/t-slibgcc-cygming, config/i386/t-cygwin,
	config/i386/t-dlldir, config/i386/t-dlldir-x: New files.
	* config/i386/t-linux: New file.
	* config/i386/t-mingw32: New file.
	* config/ia64/libgcc-glibc.ver, config/ia64/libgcc-ia64.ver: New files.
	* config/ia64/t-glibc: Rename to ...
	* config/ia64/t-linux: ... this.
	(SHLIB_MAPFILES): Set.
	* config/ia64/t-glibc-libunwind: Rename to ...
	* config/ia64/t-linux-libunwind: ... this.
	* config/ia64/t-ia64 (SHLIB_MAPFILES): Set.
	* config/ia64/t-slibgcc-hpux: New file.
	* config/m32r/libgcc-glibc.ver, config/m32r/t-linux: New files.
	* config/m68k/t-slibgcc-elf-ver: New file.
	* config/mips/t-mips16 (SHLIB_MAPFILES): Set.
	* config/mips/t-slibgcc-irix (SHLIB_MKMAP): Use $(srcdir) to refer
	to mkmap-flat.awk.
	* config/pa/t-slibgcc-hpux: New file.
	* config/pa/t-slibgcc-dwarf-ver, config/pa/t-slibgcc-sjsj-ver: New
	files.
	* config/rs6000/libgcc-darwin.10.4.ver,
	config/rs6000/libgcc-darwin.10.5.ver: New files.
	* config/rs6000/libgcc-ppc-glibc.ver: Rename to
	config/rs6000/libgcc-glibc.ver.
	* config/rs6000/libgcc-ppc64.ver: Rename to
	config/rs6000/libgcc-ibm-ldouble.ver.
	* config/rs6000/t-darwin (SHLIB_VERPFX): Remove.
	* config/rs6000/t-ibm-ldouble (SHLIB_MAPFILES): Adapt filename.
	* config/rs6000/t-ldbl128: Rename to ...
	* config/rs6000/t-linux: ... this.
	(SHLIB_MAPFILES): Adapt filename.
	* config/rs6000/t-slibgcc-aix: New file.
	* config/sh/libgcc-excl.ver, config/sh/libgcc-glibc.ver: New files.
	* config/sh/t-linux (SHLIB_MAPFILES): Use $(srcdir) to refer to
	libgcc-excl.ver, libgcc-glibc.ver.
	(SHLIB_LINK, SHLIB_INSTALL): Remove.
	* config/sparc/libgcc-glibc.ver: New file.
	* config/sparc/t-linux: New file.
	* config/xtensa/libgcc-glibc.ver, config/xtensa/t-linux: New files.
	* config.host (*-*-freebsd*): Add t-slibgcc, t-slibgcc-gld,
	t-slibgcc-elf-ver to tmake_file.
	Add t-slibgcc-nolc-override to tmake_file for posix threads on
	*-*-freebsd[34].
	(*-*-linux*, frv-*-*linux*, *-*-kfreebsd*-gnu, *-*-knetbsd*-gnu,
	*-*-gnu*, *-*-kopensolaris*-gnu): Add t-slibgcc, t-slibgcc-gld,
	t-slibgcc-elf-ver, t-linux to tmake_file.
	(*-*-netbsd*): Add t-slibgcc, t-slibgcc-gld, t-slibgcc-elf-ver to
	tmake_file.
	(alpha*-*-linux*): Add alpha/t-linux to tmake_file.
	(alpha64-dec-*vms*): Add t-slibgcc-vms to tmake_file.
	(alpha*-dec-*vms*): Likewise.
	(arm*-*-freebsd*): Append to tmake_file.
	(arm*-*-netbsdelf*): Add t-slibgcc-gld-nover to tmake_file.
	(arm*-*-linux*): Add t-slibgcc-libgcc to tmake_file for
	arm*-*-linux-*eabi.
	(arm*-*-eabi*, arm*-*-symbianelf*): Add t-slibgcc-nolc-override to
	tmake_file for arm*-*-symbianelf*.
	(bfin*-linux-uclibc*): Append to tmake_file, add bfin/t-linux.
	(cris-*-linux*, crisv32-*-linux*): Append to tmake_file, add
	cris/t-linux.
	(frv-*-*linux*): Append to tmake_file, add frv/t-linux.
	(hppa*-*-linux*): Add t-slibgcc-libgcc, pa/t-slibgcc-sjlj-ver,
	pa/t-slibgcc-dwarf-ver to tmake_file.
	(hppa[12]*-*-hpux10*): Add t-slibgcc, pa/t-slibgcc-sjlj-ver,
	pa/t-slibgcc-dwarf-ver, t-slibgcc-hpux, pa/t-slibgcc-hpux to tmake_file.
	(hppa*64*-*-hpux11*): Likewise.
	(hppa[12]*-*-hpux11*): Likewise.
	(x86_64-*-darwin*): Don't override tmake_file, but only keep
	i386/t-crtpc, i386/t-crtfm.
	(i[34567]86-*-cygwin*): Set tmake_eh_file, tmake_dlldir_file.
	Prepend $tmake_eh_file, $tmake_dlldir_file, i386/t-slibgcc-cygming
	to tmake_file.
	Add i386/t-cygwin to tmake_file.
	Prepent i386/t-mingw-pthread to tmake_file for posix threads.
	(i[34567]86-*-mingw*): Set tmake_eh_file, tmake_dlldir_file.
	Prepend $tmake_eh_file, $tmake_dlldir_file, i386/t-slibgcc-cygming
	to tmake_file.
	Add i386/t-mingw32 to tmake_file.
	(x86_64-*-mingw*): Likewise.
	(ia64*-*-freebsd*): Append to tmake_file.
	(ia64*-*-linux*): Append to tmake_file.
	Replace ia64/t-glibc by ia64/t-linux.
	Replace ia64/t-glibc-libunwind by ia64/t-linux-libunwind if using
	system libunwind.
	(ia64*-*-hpux*): Add t-slibgcc, ia64/t-slibgcc-hpux,
	t-slibgcc-hpux to tmake_file.
	(ia64-hp-*vms*): Add t-slibgcc-vms to tmake_file.
	(m32r-*-linux*): Append to tmake_file, add m32r/t-linux.
	(m32rle-*-linux*): Likewise.
	(m68k-*-linux*)): Add m68k/t-slibgcc-elf-ver to tmake_file unless
	sjlj exceptions.
	(microblaze*-linux*): New case.
	Append to tmake_file, add t-slibgcc-nolc-override.
	(powerpc-*-freebsd*): Add t-slibgcc-libgcc to tmake_file.
	(powerpc-*-linux*, powerpc64-*-linux*): Likewise.
	Replace rs6000/t-ldbl128 by rs6000/t-linux in tmake_file.
	(rs6000-ibm-aix4.[3456789]*, powerpc-ibm-aix4.[3456789]*): Add
	rs6000/t-slibgcc-aix to tmake_file.
	(rs6000-ibm-aix5.1.*, powerpc-ibm-aix5.1.*): Likewise.
	(rs6000-ibm-aix[56789].*, powerpc-ibm-aix[56789].*): Likewise.
	(sh-*-elf*, sh[12346l]*-*-elf*, sh-*-linux*)
	(sh[2346lbe]*-*-linux*, sh-*-netbsdelf*, shl*-*-netbsdelf*)
	(sh5-*-netbsd*, sh5l*-*-netbsd*, sh64-*-netbsd*)
	(sh64l*-*-netbsd*): Add t-slibgcc-libgcc to tmake_file for
	sh*-*-linux*.
	(sparc-*-linux*): Append to tmake_file for *-leon*.
	Add sparc/t-linux to tmake_file for non-Leon targets.
	(sparc64-*-linux*): Add sparc/t-linux to tmake_file.
	(tic6x-*-uclinux): New case.
	Add t-slibgcc, t-slibgcc-gld, t-slibgcc-elf-ver to tmake_file.
	(tic6x-*-*): Add c6x/t-elf to tmake_file.
	(xtensa*-*-linux*): Append to tmake_file, add xtensa/t-linux.
	(am33_2.0-*-linux*): Append to tmake_file.
	(i[34567]86-*-linux*, x86_64-*-linux*, i[34567]86-*-kfreebsd*-gnu)
	(i[34567]86-*-knetbsd*-gnu, i[34567]86-*-gnu*): Also handle
	x86_64-*-kfreebsd*-gnu.
	Add i386/t-linux to tmake_file.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@180767 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 69 insertions, 0 deletions

diff --git a/libgcc/configure b/libgcc/configure
index 80bb61c80af..0506dcf8e40 100644
--- a/libgcc/configure
+++ b/libgcc/configure
@@ -694,6 +694,7 @@ enable_maintainer_mode
 with_build_libsubdir
 enable_decimal_float
 with_system_libunwind
+enable_sjlj_exceptions
 enable_tls
 '
       ac_precious_vars='build_alias
@@ -1328,6 +1329,8 @@ Optional Features:
 			enable decimal float extension to C.  Selecting 'bid'
 			or 'dpd' choses which decimal floating point format
 			to use
+  --enable-sjlj-exceptions
+                          force use of builtin_setjmp for exceptions
   --enable-tls            Use thread-local storage [default=yes]
 
 Optional Packages:
@@ -4408,6 +4411,72 @@ $as_echo "#define HAVE_GETIPINFO 1" >>confdefs.h
   fi
 
 
+# The sjlj test is almost duplicated here and in libgo/configure.ac (for C),
+# libstdc++-v3/acinclude.m4 and libjava/configure.ac (for C++), and
+# libobjc/configure.ac (for Objective-C).
+# FIXME: This should be centralized in config/sjlj.m4.
+# Check whether --enable-sjlj-exceptions was given.
+if test "${enable_sjlj_exceptions+set}" = set; then :
+  enableval=$enable_sjlj_exceptions; case "$enableval" in
+   yes|no|auto) ;;
+   *) as_fn_error "unknown argument to --enable-sjlj-exceptions" "$LINENO" 5 ;;
+   esac
+else
+  enable_sjlj_exceptions=auto
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to use setjmp/longjmp exceptions" >&5
+$as_echo_n "checking whether to use setjmp/longjmp exceptions... " >&6; }
+if test "${libgcc_cv_lib_sjlj_exceptions+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+void bar ();
+void clean (int *);
+void foo ()
+{
+  int i __attribute__ ((cleanup (clean)));
+  bar();
+}
+
+_ACEOF
+CFLAGS_hold=$CFLAGS
+CFLAGS="--save-temps -fexceptions"
+libgcc_cv_lib_sjlj_exceptions=unknown
+if ac_fn_c_try_compile; then :
+  if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
+    libgcc_cv_lib_sjlj_exceptions=yes
+  elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
+    libgcc_cv_lib_sjlj_exceptions=no
+  fi
+fi
+CFLAGS=$CFLAGS_hold
+rm -f conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_lib_sjlj_exceptions" >&5
+$as_echo "$libgcc_cv_lib_sjlj_exceptions" >&6; }
+
+if test "$enable_sjlj_exceptions" = "auto"; then
+  enable_sjlj_exceptions=$libgcc_cv_lib_sjlj_exceptions
+fi
+
+case $enable_sjlj_exceptions in
+yes)
+
+$as_echo "#define LIBGCC_SJLJ_EXCEPTIONS 1" >>confdefs.h
+
+  ;;
+no)
+  ;;
+*)
+  as_fn_error "unable to detect exception model" "$LINENO" 5
+  ;;
+esac
+
 { $as_echo "$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 test "${acl_cv_prog_gnu_ld+set}" = set; then :