以下是我的env.mk文件片段，我遇到了g ++：错误：无法识别的命令行选项'-m64'因为我不熟悉Makefile环境所以请让你检查一下在makefile下面，如何删除-m64选项......
错误消息：
/usr/bin/make -s makemsg
DIRS is pdl /home/picocluster/altidev4/src/pd/port/unix/
CC /home/picocluster/altidev4/target/release/src/pd/pdl/Basic_Types.o
g++: error: unrecognized command line option ‘-m64’
..//../../env.mk:652: recipe for target '/home/picocluster/altidev4/target/release/src/pd/pdl/Basic_Types.o' failed
make[4]: *** [/home/picocluster/altidev4/target/release/src/pd/pdl/Basic_Types.o] Error 1
Makefile:12: recipe for target 'pdl' failed
make[3]: *** [pdl] Error 2
Makefile：
########################
#### common rules
########################
quiet_cmd_ar_a_o = AR $@
cmd_ar_a_o = $(AR) $(ARFLAGS) $(AROUT)$@ $? > /dev/null
quiet_cmd_so_o = SO $@
cmd_so_o = $(SOLINK.cc) $(SOFLAGS) $(SOOUT)$@ $^ > /dev/null
define LIB_IT
$(Q) $(if $(quiet),echo ' $($(quiet)cmd_ar_a_o)')
$(Q) $(cmd_ar_a_o)
endef
define SHLIB_IT
$(Q) $(if $(quiet),echo ' $($(quiet)cmd_so_o)')
$(Q) $(cmd_so_o)
endef
quiet_cmd_cc_o_c = CC $@
cmd_cc_o_c = mkdir -p $(dir $@); $(COMPILE.cc) $(INCLUDES) $(CC_OUTPUT_FLAG)$@ $<
**define COMPILE_IT
$(Q) $(if $(quiet),echo ' $($(quiet)cmd_cc_o_c)')
$(Q) $(cmd_cc_o_c)
endef**
%.$(LIBEXT):
$(LIB_IT)
%.$(SOEXT):
$(SHLIB_IT)
**$(TARGET_DIR)/%.o: $(DEV_DIR)/%.cpp
$(COMPILE_IT)**