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我已經測試過在我的ubuntu 16.04機器上構建SDL2源代碼（2.0.5）中的示例。使用android ndk編譯SDL2示例錯誤r14
根據https://wiki.libsdl.org/Android，我安裝了android sdk和ndk r14並設置了我的環境變量。
但是我在「簡單構建」一章中使用以下命令無法構建。
cd /usr/src/SDL2/build-scripts/
./androidbuild.sh org.libsdl.testgles ../test/testgles.c
它產生以下錯誤。
Error: The project either has no target set or the target is invalid.
Please provide a --target to the 'android update' command.
[armeabi] Compile thumb : SDL2 <= SDL.c
[armeabi] Compile thumb : SDL2 <= SDL_assert.c
[armeabi] Compile thumb : SDL2 <= SDL_error.c
[armeabi] Compile thumb : SDL2 <= SDL_hints.c
[armeabi] Compile thumb : SDL2 <= SDL_log.c
[armeabi] Compile thumb : SDL2 <= SDL_audio.c
[armeabi] Compile thumb : SDL2 <= SDL_audiocvt.c
[armeabi] Compile thumb : SDL2 <= SDL_audiodev.c
[armeabi] Compile thumb : SDL2 <= SDL_audiotypecvt.c
[armeabi] Compile thumb : SDL2 <= SDL_mixer.c
[armeabi] Compile thumb : SDL2 <= SDL_wave.c
fatal error: error in backend: Cannot select: 0x43bd850: i32 = ARMISD::SSAT 0x43acfc0, Constant:i32<15>
0x43acfc0: i32 = add 0x43ac770, 0x43bd690
0x43ac770: i32 = sra 0x43bda80, Constant:i32<8>
0x43bda80: i32 = add 0x43ac460, 0x43ad2d0
0x43ac460: i32 = add 0x4399d70, 0x43bdf50
0x4399d70: i32 = mul 0x43ad180, 0x439a160
0x43ad180: i32,ch = load<LD2[%15](tbaa=<0x4229ab8>), sext from i16> 0x42e7b60, 0x43acaf0, undef:i32
0x43acaf0: i32 = add 0x4399bb0, Constant:i32<2>
0x4399bb0: i32,ch = CopyFromReg 0x42e7b60, Register:i32 %vreg2
0x439a5c0: i32 = Register %vreg2
0x4399fa0: i32 = Constant<2>
0x43aca10: i32 = undef
0x439a160: i32,ch = load<LD2[%12](tbaa=<0x42638a8>), sext from i16> 0x42e7b60, 0x4399ec0, undef:i32
0x4399ec0: i32 = add 0x43ac7e0, Constant:i32<6>
0x43ac7e0: i32,ch = CopyFromReg 0x42e7b60, Register:i32 %vreg0
0x43bdd20: i32 = Register %vreg0
0x439a710: i32 = Constant<6>
0x43aca10: i32 = undef
0x43bdf50: i32 = mul 0x43ac4d0, 0x439a470
0x43ac4d0: i32,ch = load<LD2[%2](tbaa=<0x4229ab8>), sext from i16> 0x42e7b60, 0x4399bb0, undef:i32
0x4399bb0: i32,ch = CopyFromReg 0x42e7b60, Register:i32 %vreg2
0x439a5c0: i32 = Register %vreg2
0x43aca10: i32 = undef
0x439a470: i32,ch = load<LD2[%6](tbaa=<0x42638a8>), sext from i16> 0x42e7b60, 0x439a080, undef:i32
0x439a080: i32 = add 0x43ac7e0, Constant:i32<4>
0x43ac7e0: i32,ch = CopyFromReg 0x42e7b60, Register:i32 %vreg0
0x43bdd20: i32 = Register %vreg0
0x43ace70: i32 = Constant<4>
0x43aca10: i32 = undef
0x43ad2d0: i32 = srl 0x43aca80, Constant:i32<24>
0x43aca80: i32 = sra 0x43ac460, Constant:i32<31>
0x43ac460: i32 = add 0x4399d70, 0x43bdf50
0x4399d70: i32 = mul 0x43ad180, 0x439a160
0x43ad180: i32,ch = load<LD2[%15](tbaa=<0x4229ab8>), sext from i16> 0x42e7b60, 0x43acaf0, undef:i32
0x43acaf0: i32 = add 0x4399bb0, Constant:i32<2>
0x43aca10: i32 = undef
0x439a160: i32,ch = load<LD2[%12](tbaa=<0x42638a8>), sext from i16> 0x42e7b60, 0x4399ec0, undef:i32
0x4399ec0: i32 = add 0x43ac7e0, Constant:i32<6>
0x43aca10: i32 = undef
0x43bdf50: i32 = mul 0x43ac4d0, 0x439a470
0x43ac4d0: i32,ch = load<LD2[%2](tbaa=<0x4229ab8>), sext from i16> 0x42e7b60, 0x4399bb0, undef:i32
0x4399bb0: i32,ch = CopyFromReg 0x42e7b60, Register:i32 %vreg2
0x43aca10: i32 = undef
0x439a470: i32,ch = load<LD2[%6](tbaa=<0x42638a8>), sext from i16> 0x42e7b60, 0x439a080, undef:i32
0x439a080: i32 = add 0x43ac7e0, Constant:i32<4>
0x43aca10: i32 = undef
0x43bd700: i32 = Constant<31>
0x439a550: i32 = Constant<24>
0x43acd20: i32 = Constant<8>
0x43bd690: i32 = mul 0x43ad260, 0x43bdd90
0x43ad260: i32,ch = load<LD2[%24](tbaa=<0x42638a8>), zext from i16> 0x42e7b60, 0x43bdc40, undef:i32
0x43bdc40: i32 = add 0x43ac7e0, Constant:i32<2>
0x43ac7e0: i32,ch = CopyFromReg 0x42e7b60, Register:i32 %vreg0
0x43bdd20: i32 = Register %vreg0
0x4399fa0: i32 = Constant<2>
0x43aca10: i32 = undef
0x43bdd90: i32 = ARMISD::CMOV 0x439a390, 0x439a940, Constant:i32<0>, Register:i32 %CPSR, 0x43ac5b0
0x439a390: i32 = add 0x439a940, Constant:i32<-16>
0x439a940: i32 = AssertZext 0x439a6a0, ValueType:ch:i8
0x439a6a0: i32,ch = CopyFromReg 0x42e7b60, Register:i32 %vreg1
0x43ace00: i32 = Register %vreg1
0x43ac700: i32 = Constant<-16>
0x439a940: i32 = AssertZext 0x439a6a0, ValueType:ch:i8
0x439a6a0: i32,ch = CopyFromReg 0x42e7b60, Register:i32 %vreg1
0x43ace00: i32 = Register %vreg1
0x43bdbd0: i32 = Constant<0>
0x43ac620: i32 = Register %CPSR
0x43ac5b0: glue = ARMISD::CMPZ 0x439a2b0, Constant:i32<0>
0x439a2b0: i32 = and 0x439a940, Constant:i32<8>
0x439a940: i32 = AssertZext 0x439a6a0, ValueType:ch:i8
0x439a6a0: i32,ch = CopyFromReg 0x42e7b60, Register:i32 %vreg1
0x43ace00: i32 = Register %vreg1
0x43acd20: i32 = Constant<8>
0x43bdbd0: i32 = Constant<0>
0x43acf50: i32 = Constant<15>
In function: MS_ADPCM_nibble
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Android clang version 3.8.275480 (based on LLVM 3.8.275480)
Target: armv5te-none-linux-android
Thread model: posix
InstalledDir: /home/idkiller/android-ndk-r14/toolchains/llvm/prebuilt/linux-x86_64/bin
clang: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script.
clang: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/SDL_wave-929d6f.c
clang: note: diagnostic msg: /tmp/SDL_wave-929d6f.sh
clang: note: diagnostic msg:
********************
make: *** [obj/local/armeabi/objs/SDL2/src/audio/SDL_wave.o] Error 70
make: *** Waiting for unfinished jobs....
Buildfile: /home/idkiller/work17/SDL2-2.0.5/build/org.libsdl.testgles/build.xml
BUILD FAILED
/home/idkiller/work17/SDL2-2.0.5/build/org.libsdl.testgles/build.xml:56: sdk.dir is missing. Make sure to generate local.properties using 'android update project' or to inject it through the ANDROID_HOME environment variable.
Total time: 0 seconds
There was an error building the APK
我覺得首先'android update'錯誤可以通過在項目目錄中手動更新來修復。
但我無法猜測爲什麼LLVM後端，使上編譯SDL_wave.c
是SDL2不支持建立與鏘3.8還沒有這個錯誤？
我確定有一種方法可以使用'ndk-build'和'ant'手動構建SDL應用程序，在構建指令中描述。也許它會工作。 – HolyBlackCat
我曾在項目目錄中手動執行android update和ndk-build，但出現了相同的錯誤。 –