The rest of the binutils tree renamed this variable many years ago.
+2021-03-13  Mike Frysinger  <vapier@gentoo.org>
+
+       * Make-common.in (LINK_FOR_BUILD): Change BUILD_LDFLAGS to
+       LDFLAGS_FOR_BUILD.
+
 2021-03-13  Mike Frysinger  <vapier@gentoo.org>
 
        * Make-common.in (COMPILE_FOR_BUILD, LINK_FOR_BUILD): Define.
 
 LIB_OBJS = callback.o syscall.o targ-map.o version.o $(SIM_OBJS)
 
 COMPILE_FOR_BUILD = $(CC_FOR_BUILD) $(BUILD_CFLAGS)
-LINK_FOR_BUILD = $(CC_FOR_BUILD) $(BUILD_CFLAGS) $(BUILD_LDFLAGS) -o $@
+LINK_FOR_BUILD = $(CC_FOR_BUILD) $(BUILD_CFLAGS) $(LDFLAGS_FOR_BUILD) -o $@
 
 RUNTESTFLAGS =
 
 
+2021-03-13  Mike Frysinger  <vapier@gentoo.org>
+
+       * Makefile.in (LDFLAGS_FOR_BUILD): Define.
+       (BUILD_LDFLAGS): Delete.
+       (LINK_FOR_BUILD): Change BUILD_LDFLAGS to LDFLAGS_FOR_BUILD.
+       * configure.ac (LDFLAGS_FOR_BUILD): Define.
+       * configure: Regenerate.
+
 2021-03-13  Mike Frysinger  <vapier@gentoo.org>
 
        * Makefile.in (COMPILE_FOR_BUILD, LINK_FOR_BUILD): Define.
 
 
 CC_FOR_BUILD = @CC_FOR_BUILD@
 CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
+LDFLAGS_FOR_BUILD = @LDFLAGS_FOR_BUILD@
 
 WARN_CFLAGS = @WARN_CFLAGS@
 WERROR_CFLAGS = @WERROR_CFLAGS@
        $(IGEN_WARN_CFLAGS) \
        $(IGEN_WERROR_CFLAGS) \
        $(INCLUDES)
-BUILD_LDFLAGS = 
 
 COMPILE_FOR_BUILD = $(CC_FOR_BUILD) $(BUILD_CFLAGS)
-LINK_FOR_BUILD = $(CC_FOR_BUILD) $(CFLAGS_FOR_BUILD) $(BUILD_LDFLAGS) -o $@
+LINK_FOR_BUILD = $(CC_FOR_BUILD) $(CFLAGS_FOR_BUILD) $(LDFLAGS_FOR_BUILD) -o $@
 
 all:   igen
 #all:  tmp-filter tmp-table tmp-ld-insn tmp-ld-cache tmp-ld-decode tmp-gen
 
 ac_unique_file="table.h"
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
+LDFLAGS_FOR_BUILD
 CFLAGS_FOR_BUILD
 CC_FOR_BUILD
 target_os
 if test "x$cross_compiling" = "xno" -a "x$host" != "xi386-windows"; then
   CC_FOR_BUILD='$(CC)'
   CFLAGS_FOR_BUILD='$(CFLAGS)'
+  LDFLAGS_FOR_BUILD='$(LDFLAGS)'
 else
   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-"-g"}
+  LDFLAGS_FOR_BUILD=
 fi
 
 # Make sure we can run config.sub.
 
 
 
+
 ac_config_files="$ac_config_files Makefile"
 
 cat >confcache <<\_ACEOF
 
 if test "x$cross_compiling" = "xno" -a "x$host" != "xi386-windows"; then
   CC_FOR_BUILD='$(CC)'
   CFLAGS_FOR_BUILD='$(CFLAGS)'
+  LDFLAGS_FOR_BUILD='$(LDFLAGS)'
 else
   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-"-g"}
+  LDFLAGS_FOR_BUILD=
 fi
 
 AC_CANONICAL_SYSTEM
 
 AC_SUBST(CC_FOR_BUILD)
 AC_SUBST(CFLAGS_FOR_BUILD)
+AC_SUBST(LDFLAGS_FOR_BUILD)
 
 AC_OUTPUT(Makefile)
 
+2021-03-13  Mike Frysinger  <vapier@gentoo.org>
+
+       * Makefile.in (BUILD_LDFLAGS): Rename to ...
+       (LDFLAGS_FOR_BUILD): ... this.
+       (LINK_FOR_BUILD): Change BUILD_LDFLAGS to LDFLAGS_FOR_BUILD.
+
 2021-03-13  Mike Frysinger  <vapier@gentoo.org>
 
        * Makefile.in (COMPILE_FOR_BUILD, LINK_FOR_BUILD): Define.
 
 NOWARN_CFLAGS  = $(CFLAGS) $(INLINE_CFLAGS) $(CONFIG_CFLAGS) $(INCLUDES) $(SIM_FPU_CFLAGS)
 BUILD_CFLAGS   = $(CFLAGS_FOR_BUILD) $(INCLUDES) $(WARNING_CFLAGS)
 
-BUILD_LDFLAGS  =
+LDFLAGS_FOR_BUILD      =
 LIBS = @LIBS@
 
 COMPILE_FOR_BUILD = $(CC_FOR_BUILD) $(BUILD_CFLAGS)
-LINK_FOR_BUILD = $(CC_FOR_BUILD) $(BUILD_CFLAGS) $(BUILD_LDFLAGS) -o $@
+LINK_FOR_BUILD = $(CC_FOR_BUILD) $(BUILD_CFLAGS) $(LDFLAGS_FOR_BUILD) -o $@
 
 CONFIG_FILE = @sim_config@
 IGEN_OPCODE_RULES = @sim_opcode@