+# Linker flags to use for stage1 or when not boostrapping.
+AC_ARG_WITH(stage1-ldflags,
+[AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
+[if test "$withval" = "no" -o "$withval" = "yes"; then
+ stage1_ldflags=
+ else
+ stage1_ldflags=$withval
+ fi],
+[stage1_ldflags=])
+AC_SUBST(stage1_ldflags)
+
+# Libraries to use for stage1 or when not bootstrapping.
+AC_ARG_WITH(stage1-libs,
+[AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
+[if test "$withval" = "no" -o "$withval" = "yes"; then
+ stage1_libs=
+ else
+ stage1_libs=$withval
+ fi],
+[stage1_libs=$with_host_libstdcxx])
+AC_SUBST(stage1_libs)
+
+# Libraries to use for stage2 and later builds. This defaults to the
+# argument passed to --with-host-libstdcxx.
+AC_ARG_WITH(boot-libs,
+[AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
+[if test "$withval" = "no" -o "$withval" = "yes"; then
+ poststage1_libs=
+ else
+ poststage1_libs=$withval
+ fi],
+[poststage1_libs=$with_host_libstdcxx])
+AC_SUBST(poststage1_libs)
+
+# Linker flags to use for stage2 and later builds.
+AC_ARG_WITH(boot-ldflags,
+[AS_HELP_STRING([--with-boot-ldflags=FLAGS],
+ [linker flags for stage2 and later])],
+[if test "$withval" = "no" -o "$withval" = "yes"; then
+ poststage1_ldflags=
+ else
+ poststage1_ldflags=$withval
+ fi],
+[poststage1_ldflags=
+ # In stages 2 and 3, default to linking libstdc++ and libgcc
+ # statically. But if the user explicitly specified the libraries to
+ # use, trust that they are doing what they want.
+ if test "$poststage1_libs" = ""; then
+ poststage1_ldflags="-static-libstdc++ -static-libgcc"
+ fi])
+AC_SUBST(poststage1_ldflags)
+