针对使用Renderscript从NDKçpre-棒棒糖设备++ [英] Targeting pre-lollipop devices using Renderscript from NDK C++
问题描述
我想用Renderscript从我编译使用Android NDK C ++ code。我建立了HelloComputeNDK样本附带的NDK。它运行在棒棒糖的设备很好，但以下消息崩溃的奇巧（4.4.4）在亚行logcat ：
I would like to use Renderscript from C++ code that I compile using the Android NDK. I built the "HelloComputeNDK" sample that ships with the NDK. It runs fine on Lollipop devices, but crashes on KitKat (4.4.4) with the following message on adb logcat:
E/bcinfo (28302): Invalid API version: 21 is out of range ('11' - '19')
E/RenderScript(28302): Failed to translate bitcode from version: 21
E/rsC++ (28302): Internal error: Object id 0.
F/libc (28302): Fatal signal 11 (SIGSEGV) at 0x00000000 (code=1), thread 28317 (hellocomputendk)
I/DEBUG ( 363): Build fingerprint: 'htc/bm/htc_m8:4.4.4/KTU84P/401507.4:user/release-keys'
I/DEBUG ( 363): Revision: '0'
I/DEBUG ( 363): pid: 28302, tid: 28317, name: hellocomputendk >>> com.example.android.rs.hellocomputendk <<<
I/DEBUG ( 363): debuggerd: checkTellHTCSettings
I/DEBUG ( 363): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000000
我已经设置的minSdkVersion =在AndroidManifest.xml中，中的应用.mk，而 APP_PLATFORM14：=机器人-19 TARGET_PLATFORM：=在Android.mk的android-19 。我用构建示例：
I have set minSdkVersion="14" in AndroidManifest.xml, APP_PLATFORM := android-19 in Application.mk, and TARGET_PLATFORM := android-19 in Android.mk. I build the sample using:
android update project --name HelloComputeNDK --path . --target android-19
ndk-build clean
ndk-build -d
ant -verbose debug install
我也看到了类似的事故在其他地方讨论，但在这种情况下，问题是缺少 APP_PLATFORM 或 TARGET_PLATFORM 。这并没有出现在这里成为问题
I have seen similar crashes discussed elsewhere, but the problem in those cases was a missing APP_PLATFORM or TARGET_PLATFORM. This does does not appear to be the problem here.
我相信我有同样的问题，因为这个人： NDK示例项目HelloComputeNDK崩溃 NDK示例项目HelloComputeNDK问题的。我想这个问题得到downvoted因为用户发布了两个这似乎是重复的。我有同样的问题，我相信这是一个合理的问题，所以我问在这里。
I believe I have the same problem as this person: NDK Sample Project HelloComputeNDK Crashes, NDK Sample Project HelloComputeNDK Problems. I think that question got downvoted because the user posted two that appeared to be duplicates. I have the same problem and I believe it is a legitimate question so I am asking it here.
我使用的SDK构建工具版本21.1.2和NDK r10d。
I am using SDK build tools version 21.1.2 and NDK r10d.
我也尝试添加在project.properties以下内容：
I also tried adding the following in project.properties:
renderscript.target=19
renderscript.support.mode=true
这给出了错误sdklib.build.DuplicateFileException：重复的文件，在里面APK相同的路径，因为HelloComputeNDK例子显式包括Android.mk的RenderScript支持库：
This gives the error "sdklib.build.DuplicateFileException: Duplicate files at the same path inside the APK" because the HelloComputeNDK example explictly includes the RenderScript support library in "Android.mk":
include $(CLEAR_VARS)
LOCAL_MODULE := RSSupport
LOCAL_SRC_FILES := $(SYSROOT_LINK)/usr/lib/rs/lib$(LOCAL_MODULE)$(TARGET_SONAME_EXTENSION)
include $(PREBUILT_SHARED_LIBRARY)
如果我从Android.mk删除这些线路的例子建立并成功安装和我以前一样得到同样的API 21死机。
If I remove those lines from Android.mk the example builds and install successfully and I get the same API 21 crash as before.
推荐答案
这是由于NDK构建一个错误，其不通过-target-API 19到LLVM-RS-CC。由于NDK R9B第一RS的支持，RenderScript主机工具（bcc_compat，LLVM-RS-C等，给K分公司编制，API 19）未更新，直到R10C当他们从L个分支（API 21）重修。如果没有明确的选项-target-API N，LLVM-RS-CC在R10C +使用默认的API，它是21，并且在logcat中看到无法在奇巧的bcinfo版本检查。
This is due to a bug in ndk-build which doesn't pass "-target-api 19" to llvm-rs-cc. Since the first RS support in NDK r9b, the RenderScript host tools (bcc_compat, llvm-rs-c, etc, compiled from K branch, API 19) weren't updated until r10c when they were rebuilt from L branch (API 21). Without the explicit option "-target-api N", llvm-rs-cc in r10c+ uses the default API which is 21, and fail version check in Kitkat's bcinfo as seen in logcat.
修复被提交，并将于NDK r10e或更高版本： https：//开头的android -review.googlesource.com/#/c/124641
Fix is submitted and will be available in NDK r10e or later: https://android-review.googlesource.com/#/c/124641
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