scripts/build/internals.sh: compile wrapper with portable options.

static linking is not possible on MacOS, and unnessecary on other systems.
The old optimization and warning flags crash the gcc on MacOS
and (imho) are a bit overdone for this software.

scripts/build/internals.sh

@@ -58,15 +58,15 @@ do_finish() {
                                    ".${CT_TARGET}-wrapper"
                 ;;
             exec)
-                _t="-s"
-                if [ "${CT_DEBUG_CT}" = "y" ]; then
-                  _t="" # If debugging crosstool-NG, don't strip the wrapper
-                fi
                 CT_DoExecLog DEBUG "${CT_HOST}-gcc"                           \
-                                   -Wall -Wextra -Wunreachable-code -Werror   \
-                                   -O3 -static ${_t}                          \
+                                   -Wall -Wextra -Werror                      \
+                                   -Os                                        \
                                    "${CT_LIB_DIR}/scripts/wrapper.c"          \
                                    -o ".${CT_TARGET}-wrapper"
+                if [ "${CT_DEBUG_CT}" != "y" ]; then
+                    # If not debugging crosstool-NG, strip the wrapper
+                    CT_DoExecLog DEBUG "${CT_HOST}-strip" ".${CT_TARGET}-wrapper"
+                fi
                 ;;
         esac