android - 编译 android jni 示例时出错：无效 -march= 选项：`armv5te'

Question

当我尝试编译一些 android ndk 示例时，我总是会收到此错误：

$ cd ~/Dev/Android/ndk/samples/hello-jni
$ ~/Dev/Android/ndk/ndk-build
Gdbserver      : [arm-linux-androideabi-4.4.3] libs/armeabi/gdbserver
Gdbsetup       : libs/armeabi/gdb.setup
Compile thumb  : hello-jni <= hello-jni.c
Assembler messages:
Fatal error: invalid -march= option: `armv5te'
make: *** [obj/local/armeabi/objs-debug/hello-jni/hello-jni.o] Error 1

我或我的系统出了什么问题？

Answer 1

我找到了一个解决方案：

$ ln -s $NDK_PATH/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-as $NDK_PATH/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/libexec/gcc/arm-linux-androideabi/4.4.3/as

首先，我运行带有选项的构建器以显示正在执行的命令：

$ ndk-build -B V=1

所以我发现了它如何执行编译器并将相同的命令传递给 strace

strace arm-linux-androideabi-gcc -MMD -MP -MF ./obj/local/armeabi/objs-debug/hello-jni/hello-jni.o.d -fpic -ffunction-sections -funwind-tables -fstack-protector -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__  -Wno-psabi -march=armv5te -mtune=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -Ijni -DANDROID  -Wa,--noexecstack -O0 -g -I/home/aleck/Dev/Android/ndk/platforms/android-8/arch-arm/usr/include -c  jni/hello-jni.c -o ./obj/local/armeabi/objs-debug/hello-jni/hello-jni.o

这表明由于某种未知原因 arm-linux-androideabi-gcc 会按照标准搜索汇编程序，但在这种情况下，名称为 'as' 而不是 'arm-linux-androideabi-as'

stat64("/home/aleck/Dev/Android/ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/../libexec/gcc/arm-linux-androideabi/4.4.3/as", 0xbfedea68) = -1 ENOENT (No such file or directory)
stat64("/home/aleck/Dev/Android/ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/../libexec/gcc/as", 0xbfedea68) = -1 ENOENT (No such file or directory)
stat64("/home/aleck/Dev/Android/ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/../lib/gcc/arm-linux-androideabi/4.4.3/../../../../arm-linux-androideabi/bin/arm-linux-androideabi/4.4.3/as", 0xbfedea68) = -1 ENOENT (No such file or directory)
stat64("/home/aleck/Dev/Android/ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/../lib/gcc/arm-linux-androideabi/4.4.3/../../../../arm-linux-androideabi/bin/as", 0xbfedea68) = -1 ENOENT (No such file or directory)
vfork()                                 = 6931
waitpid(6931, Assembler messages:
Fatal error: invalid -march= option: `armv5te'

所以我首先在预期的位置创建了一个名为“as”的软链接。