Nintendo 3DS

解決"gcc.cc: undefined reference to host_detect_local_cpu(int, char const**)"問題

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參考資訊：
1. cross-compilation-issue

問題：

g++ -no-pie   -g -O2   -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE   -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H -static-libstdc++ -static-libgcc  -o xgcc gcc.o gcc-main.o ggc-none.o \
  c/gccspec.o  libcommon-target.a \
   libcommon.a ../libcpp/libcpp.a   ../libbacktrace/.libs/libbacktrace.a ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a
/usr/bin/ld: gcc.o: in function `.LANCHOR1':
gcc.cc:(.rodata+0x58c): undefined reference to `host_detect_local_cpu(int, char const**)'
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:2172: xgcc] Error 1
make[1]: Leaving directory 'buildscripts/.devkitARM/arm-none-eabi/gcc/gcc'
make: *** [Makefile:4607: all-gcc] Error 2
Error building gcc stage1

解法：

$ export CROSSBUILD=arm-linux-gnueabihf
$ ./build-devkit.sh

P.S. 如果在ARM CPU上面編譯devkitpro，需要指定CROSSBUILD

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