交叉编译高手请进（链接问题）
交叉编译一个库，需要链接libc.a，总链接不上。
出错：
Linking console executable: bin/Debug/agg_androidGNU ld (GNU Binutils) 2.19 Supported emulations: armelf_linux_eabi armelfb_linux_eabiusing internal linker script:arm-linux-androideabi-ld: warning: cannot find entry symbol _start; defaulting to 000080c0obj/Debug/Agg/font_freetype/agg_font_freetype.o: In function `agg::dbl_to_plain_fx(double)':/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:136: undefined reference to `__aeabi_dmul'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:136: undefined reference to `__aeabi_d2iz'obj/Debug/Agg/font_freetype/agg_font_freetype.o: In function `agg::int26p6_to_dbl(int)':/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:142: undefined reference to `__aeabi_i2d'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:142: undefined reference to `__aeabi_ddiv'obj/Debug/Agg/font_freetype/agg_font_freetype.o: In function `agg::dbl_to_int26p6(double)':/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:148: undefined reference to `__aeabi_dmul'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:148: undefined reference to `__aeabi_dadd'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:148: undefined reference to `__aeabi_d2iz'obj/Debug/Agg/font_freetype/agg_font_freetype.o: In function `~font_engine_freetype_base':/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:517: undefined reference to `__cxa_end_cleanup'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:517: undefined reference to `__cxa_end_cleanup'obj/Debug/Agg/font_freetype/agg_font_freetype.o: In function `font_engine_freetype_base':/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:565: undefined reference to `__cxa_end_cleanup'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:565: undefined reference to `__cxa_end_cleanup'obj/Debug/Agg/font_freetype/agg_font_freetype.o: In function `agg::font_engine_freetype_base::ascender() const':/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:594: undefined reference to `__aeabi_i2d'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:594: undefined reference to `__aeabi_dmul'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:594: undefined reference to `__aeabi_i2d'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:594: undefined reference to `__aeabi_ddiv'obj/Debug/Agg/font_freetype/agg_font_freetype.o: In function `agg::font_engine_freetype_base::descender() const':/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:604: undefined reference to `__aeabi_i2d'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:604: undefined reference to `__aeabi_dmul'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:604: undefined reference to `__aeabi_i2d'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:604: undefined reference to `__aeabi_ddiv'obj/Debug/Agg/font_freetype/agg_font_freetype.o: In function `agg::font_engine_freetype_base::height(double)':/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:770: undefined reference to `__aeabi_dmul'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:770: undefined reference to `__aeabi_d2iz'obj/Debug/Agg/font_freetype/agg_font_freetype.o: In function `agg::font_engine_freetype_base::width(double)':/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:782: undefined reference to `__aeabi_dmul'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:782: undefined reference to `__aeabi_d2iz'obj/Debug/Agg/font_freetype/agg_font_freetype.o: In function `agg::font_engine_freetype_base::prepare_glyph(unsigned int)':/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:983: undefined reference to `__aeabi_d2iz'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:984: undefined reference to `__aeabi_d2iz'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:985: undefined reference to `__aeabi_d2iz'/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:986: undefined reference to `__aeabi_d2iz'obj/Debug/Agg/font_freetype/agg_font_freetype.o:/home/maadiah/seGraphics/Agg/font_freetype/agg_font_freetype.cpp:1004: more undefined references to `__aeabi_d2iz' follow
