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Some study and experiment documentation recording my study life in China University of Mining and

TeX 0.29% C++ 0.21% Lex 0.12% Yacc 0.11% C 4.65% Java 3.96% CMake 0.01% Assembly 0.01% HTML 1.89% JavaScript 1.62% CSS 0.59% PLSQL 0.13% TSQL 0.10% FreeMarker 0.08% Batchfile 0.01% Shell 0.01% Python 1.51% Vue 0.03% Jupyter Notebook 84.69%

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Forkers

yixiaozhi99 zhangji1810 cokeom dotjunz xinwr palletteli amourlion

cumt_studyfiles's Issues

fb3-3.h中result和symtab报错C/C++: ld: error: duplicate symbol

软件版本

在 File > Project Structure 中对软件版本进行配置

  • Android Gradle Plugin Version: 7.3.0-alpha07
  • Gradle Version: 7.4
  • Compile Sdk Version: 32
  • Build Tools Version: 32.1.0 rc1
  • NDK Version: 25.0.8221429 rc2
  • Source Compatibility: $JavaVersion.VERSION_11
  • Target Compatibility: $JavaVersion.VERSION_11

设置后成功build，不报错

实现过程

按照本仓库flex&bison实验四操作进行。

前面步骤基本与文档操作一致：

  • 以Native C++类型创建了项目CumtCal，下载了NDK和CMake。
  • 在java文件夹MainActivity内进行计算操作（绑定了输入文本框、计算按钮、输出显示文本框），导入了cumtcal库（也就是原来项目中的native-lib-flex），点击按钮将进行 trans() （也就是原来项目中的 calc() ）。同时，MainActivity把原来多出来的caculator类合并在了一起，经验证，分开写和合并写无影响。
  • cpp文件夹下是cal文件夹（也就是原来项目中的calc_advan），其中的文件均是copy自原来的项目中，除了native-lib.cpp文件的 Java_com_hujunyao_cumtcal_MainActivity_trans() 模仿原函数修改了函数名和变量名。经验证，注释语句可以单独正常运行，无影响（注释语句实现了从lineedit读入数据，然后返回 Hello, + 输入数据 ，最后显示在textview上 ）。（所以我个人理解是在 calc() 出了问题，但好像不能对C文件进行调试，对C文件打点步进，就跳转到汇编的页面，所以也没办法看懂。）
  • 然后运行。

注释语句的正常运行（给fb3-3.h加上static后）

遇到的问题

点击运行，build过程出现如下错误。

C/C++: ld: error: duplicate symbol: symtab
ld: error: duplicate symbol: result

image-20220319174619794
具体报错如下

Execution failed for task ':app:buildCMakeDebug[x86]'.
> com.android.ide.common.process.ProcessException: ninja: Entering directory `D:\CodeField\AndroidCode\CumtCal\app\.cxx\Debug\1g5v5a52\x86'
  [1/1] Linking CXX shared library D:\CodeField\AndroidCode\CumtCal\app\build\intermediates\cxx\Debug\1g5v5a52\obj\x86\libcumtcal.so
  FAILED: D:/CodeField/AndroidCode/CumtCal/app/build/intermediates/cxx/Debug/1g5v5a52/obj/x86/libcumtcal.so 
  cmd.exe /C "cd . && D:\Software\AndroidSDK\ndk\25.0.8221429\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe --target=i686-none-linux-android21 --sysroot=D:/Software/AndroidSDK/ndk/25.0.8221429/toolchains/llvm/prebuilt/windows-x86_64/sysroot -fPIC -g -DANDROID -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security   -fno-limit-debug-info  -static-libstdc++ -Wl,--build-id=sha1 -Wl,--no-rosegment -Wl,--fatal-warnings -Wl,--no-undefined -Qunused-arguments -shared -Wl,-soname,libcumtcal.so -o D:\CodeField\AndroidCode\CumtCal\app\build\intermediates\cxx\Debug\1g5v5a52\obj\x86\libcumtcal.so CMakeFiles/cumtcal.dir/cal/native-lib.cpp.o CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o CMakeFiles/cumtcal.dir/cal/lex.yy.c.o CMakeFiles/cumtcal.dir/cal/y.tab.c.o  -llog  -latomic -lm && cd ."
  ld: error: duplicate symbol: result
  >>> defined at fb3-3.h:19 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:19)
  >>>            CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o:(result)
  >>> defined at fb3-3.h:19 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:19)
  >>>            CMakeFiles/cumtcal.dir/cal/lex.yy.c.o:(.bss.result+0x0)

* Try:
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:buildCMakeDebug[x86]'.
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.lambda$executeIfValid$1(ExecuteActionsTaskExecuter.java:147)
	at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:282)
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeIfValid(ExecuteActionsTaskExecuter.java:145)
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:133)
	at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:77)
	at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
	at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:51)
	at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
	at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)
	at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
	at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:77)
	at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:55)
	at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:199)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
	at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:73)
	at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:52)
	at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:74)
	at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:333)
	at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:320)
	at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:313)
	at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:299)
	at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.lambda$run$0(DefaultPlanExecutor.java:143)
	at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:227)
	at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:218)
	at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:140)
	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
	at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
Caused by: org.gradle.internal.UncheckedException: com.android.ide.common.process.ProcessException: ninja: Entering directory `D:\CodeField\AndroidCode\CumtCal\app\.cxx\Debug\1g5v5a52\x86'
[1/1] Linking CXX shared library D:\CodeField\AndroidCode\CumtCal\app\build\intermediates\cxx\Debug\1g5v5a52\obj\x86\libcumtcal.so
FAILED: D:/CodeField/AndroidCode/CumtCal/app/build/intermediates/cxx/Debug/1g5v5a52/obj/x86/libcumtcal.so 
cmd.exe /C "cd . && D:\Software\AndroidSDK\ndk\25.0.8221429\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe --target=i686-none-linux-android21 --sysroot=D:/Software/AndroidSDK/ndk/25.0.8221429/toolchains/llvm/prebuilt/windows-x86_64/sysroot -fPIC -g -DANDROID -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security   -fno-limit-debug-info  -static-libstdc++ -Wl,--build-id=sha1 -Wl,--no-rosegment -Wl,--fatal-warnings -Wl,--no-undefined -Qunused-arguments -shared -Wl,-soname,libcumtcal.so -o D:\CodeField\AndroidCode\CumtCal\app\build\intermediates\cxx\Debug\1g5v5a52\obj\x86\libcumtcal.so CMakeFiles/cumtcal.dir/cal/native-lib.cpp.o CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o CMakeFiles/cumtcal.dir/cal/lex.yy.c.o CMakeFiles/cumtcal.dir/cal/y.tab.c.o  -llog  -latomic -lm && cd ."
ld: error: duplicate symbol: result
>>> defined at fb3-3.h:19 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:19)
>>>            CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o:(result)
>>> defined at fb3-3.h:19 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:19)
>>>            CMakeFiles/cumtcal.dir/cal/lex.yy.c.o:(.bss.result+0x0)

ld: error: duplicate symbol: symtab
>>> defined at fb3-3.h:23 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:23)
>>>            CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o:(symtab)
>>> defined at fb3-3.h:23 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:23)
>>>            CMakeFiles/cumtcal.dir/cal/lex.yy.c.o:(.bss.symtab+0x0)

ld: error: duplicate symbol: result
>>> defined at fb3-3.h:19 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:19)
>>>            CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o:(result)
>>> defined at fb3-3.h:19 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:19)
>>>            CMakeFiles/cumtcal.dir/cal/y.tab.c.o:(.bss.result+0x0)

ld: error: duplicate symbol: symtab
>>> defined at fb3-3.h:23 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:23)
>>>            CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o:(symtab)
>>> defined at fb3-3.h:23 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:23)
>>>            CMakeFiles/cumtcal.dir/cal/y.tab.c.o:(.bss.symtab+0x0)
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.

C++ build system [build] failed while executing:
    @echo off
    "D:\\Software\\AndroidSDK\\cmake\\3.18.1\\bin\\ninja.exe" ^
      -C ^
      "D:\\CodeField\\AndroidCode\\CumtCal\\app\\.cxx\\Debug\\1g5v5a52\\x86" ^
      cumtcal
  from D:\CodeField\AndroidCode\CumtCal\app
	at org.gradle.internal.UncheckedException.throwAsUncheckedException(UncheckedException.java:68)
	at org.gradle.internal.UncheckedException.throwAsUncheckedException(UncheckedException.java:41)
	at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:107)
	at org.gradle.api.internal.project.taskfactory.StandardTaskAction.doExecute(StandardTaskAction.java:58)
	at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:51)
	at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:29)
	at org.gradle.api.internal.tasks.execution.TaskExecution$3.run(TaskExecution.java:242)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:29)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:26)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.run(DefaultBuildOperationRunner.java:47)
	at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:68)
	at org.gradle.api.internal.tasks.execution.TaskExecution.executeAction(TaskExecution.java:227)
	at org.gradle.api.internal.tasks.execution.TaskExecution.executeActions(TaskExecution.java:210)
	at org.gradle.api.internal.tasks.execution.TaskExecution.executeWithPreviousOutputFiles(TaskExecution.java:193)
	at org.gradle.api.internal.tasks.execution.TaskExecution.execute(TaskExecution.java:171)
	at org.gradle.internal.execution.steps.ExecuteStep.executeInternal(ExecuteStep.java:89)
	at org.gradle.internal.execution.steps.ExecuteStep.access$000(ExecuteStep.java:40)
	at org.gradle.internal.execution.steps.ExecuteStep$1.call(ExecuteStep.java:53)
	at org.gradle.internal.execution.steps.ExecuteStep$1.call(ExecuteStep.java:50)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:199)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
	at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:73)
	at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:50)
	at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:40)
	at org.gradle.internal.execution.steps.RemovePreviousOutputsStep.execute(RemovePreviousOutputsStep.java:68)
	at org.gradle.internal.execution.steps.RemovePreviousOutputsStep.execute(RemovePreviousOutputsStep.java:38)
	at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:48)
	at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:36)
	at org.gradle.internal.execution.steps.CancelExecutionStep.execute(CancelExecutionStep.java:41)
	at org.gradle.internal.execution.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:74)
	at org.gradle.internal.execution.steps.TimeoutStep.execute(TimeoutStep.java:55)
	at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:51)
	at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:29)
	at org.gradle.internal.execution.steps.CaptureStateAfterExecutionStep.execute(CaptureStateAfterExecutionStep.java:61)
	at org.gradle.internal.execution.steps.CaptureStateAfterExecutionStep.execute(CaptureStateAfterExecutionStep.java:42)
	at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:60)
	at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:27)
	at org.gradle.internal.execution.steps.BuildCacheStep.executeWithoutCache(BuildCacheStep.java:180)
	at org.gradle.internal.execution.steps.BuildCacheStep.lambda$execute$1(BuildCacheStep.java:75)
	at org.gradle.internal.Either$Right.fold(Either.java:175)
	at org.gradle.internal.execution.caching.CachingState.fold(CachingState.java:59)
	at org.gradle.internal.execution.steps.BuildCacheStep.execute(BuildCacheStep.java:73)
	at org.gradle.internal.execution.steps.BuildCacheStep.execute(BuildCacheStep.java:48)
	at org.gradle.internal.execution.steps.StoreExecutionStateStep.execute(StoreExecutionStateStep.java:36)
	at org.gradle.internal.execution.steps.StoreExecutionStateStep.execute(StoreExecutionStateStep.java:25)
	at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:36)
	at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:22)
	at org.gradle.internal.execution.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:110)
	at org.gradle.internal.execution.steps.SkipUpToDateStep.lambda$execute$2(SkipUpToDateStep.java:56)
	at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:56)
	at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:38)
	at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:73)
	at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:44)
	at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:37)
	at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:27)
	at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:89)
	at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:50)
	at org.gradle.internal.execution.steps.ValidateStep.execute(ValidateStep.java:114)
	at org.gradle.internal.execution.steps.ValidateStep.execute(ValidateStep.java:57)
	at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:76)
	at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:50)
	at org.gradle.internal.execution.steps.SkipEmptyWorkStep.executeWithNoEmptySources(SkipEmptyWorkStep.java:249)
	at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:86)
	at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:54)
	at org.gradle.internal.execution.steps.RemoveUntrackedExecutionStateStep.execute(RemoveUntrackedExecutionStateStep.java:32)
	at org.gradle.internal.execution.steps.RemoveUntrackedExecutionStateStep.execute(RemoveUntrackedExecutionStateStep.java:21)
	at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsStartedStep.execute(MarkSnapshottingInputsStartedStep.java:38)
	at org.gradle.internal.execution.steps.LoadPreviousExecutionStateStep.execute(LoadPreviousExecutionStateStep.java:43)
	at org.gradle.internal.execution.steps.LoadPreviousExecutionStateStep.execute(LoadPreviousExecutionStateStep.java:31)
	at org.gradle.internal.execution.steps.AssignWorkspaceStep.lambda$execute$0(AssignWorkspaceStep.java:40)
	at org.gradle.api.internal.tasks.execution.TaskExecution$4.withWorkspace(TaskExecution.java:287)
	at org.gradle.internal.execution.steps.AssignWorkspaceStep.execute(AssignWorkspaceStep.java:40)
	at org.gradle.internal.execution.steps.AssignWorkspaceStep.execute(AssignWorkspaceStep.java:30)
	at org.gradle.internal.execution.steps.IdentityCacheStep.execute(IdentityCacheStep.java:37)
	at org.gradle.internal.execution.steps.IdentityCacheStep.execute(IdentityCacheStep.java:27)
	at org.gradle.internal.execution.steps.IdentifyStep.execute(IdentifyStep.java:44)
	at org.gradle.internal.execution.steps.IdentifyStep.execute(IdentifyStep.java:33)
	at org.gradle.internal.execution.impl.DefaultExecutionEngine$1.execute(DefaultExecutionEngine.java:76)
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeIfValid(ExecuteActionsTaskExecuter.java:144)
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:133)
	at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:77)
	at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
	at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:51)
	at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
	at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)
	at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
	at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:77)
	at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:55)
	at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:199)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
	at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
	at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:73)
	at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:52)
	at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:74)
	at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:333)
	at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:320)
	at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:313)
	at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:299)
	at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.lambda$run$0(DefaultPlanExecutor.java:143)
	at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:227)
	at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:218)
	at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:140)
	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
	at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
Caused by: com.android.ide.common.process.ProcessException: ninja: Entering directory `D:\CodeField\AndroidCode\CumtCal\app\.cxx\Debug\1g5v5a52\x86'
[1/1] Linking CXX shared library D:\CodeField\AndroidCode\CumtCal\app\build\intermediates\cxx\Debug\1g5v5a52\obj\x86\libcumtcal.so
FAILED: D:/CodeField/AndroidCode/CumtCal/app/build/intermediates/cxx/Debug/1g5v5a52/obj/x86/libcumtcal.so 
cmd.exe /C "cd . && D:\Software\AndroidSDK\ndk\25.0.8221429\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe --target=i686-none-linux-android21 --sysroot=D:/Software/AndroidSDK/ndk/25.0.8221429/toolchains/llvm/prebuilt/windows-x86_64/sysroot -fPIC -g -DANDROID -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security   -fno-limit-debug-info  -static-libstdc++ -Wl,--build-id=sha1 -Wl,--no-rosegment -Wl,--fatal-warnings -Wl,--no-undefined -Qunused-arguments -shared -Wl,-soname,libcumtcal.so -o D:\CodeField\AndroidCode\CumtCal\app\build\intermediates\cxx\Debug\1g5v5a52\obj\x86\libcumtcal.so CMakeFiles/cumtcal.dir/cal/native-lib.cpp.o CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o CMakeFiles/cumtcal.dir/cal/lex.yy.c.o CMakeFiles/cumtcal.dir/cal/y.tab.c.o  -llog  -latomic -lm && cd ."
ld: error: duplicate symbol: result
>>> defined at fb3-3.h:19 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:19)
>>>            CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o:(result)
>>> defined at fb3-3.h:19 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:19)
>>>            CMakeFiles/cumtcal.dir/cal/lex.yy.c.o:(.bss.result+0x0)

ld: error: duplicate symbol: symtab
>>> defined at fb3-3.h:23 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:23)
>>>            CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o:(symtab)
>>> defined at fb3-3.h:23 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:23)
>>>            CMakeFiles/cumtcal.dir/cal/lex.yy.c.o:(.bss.symtab+0x0)

ld: error: duplicate symbol: result
>>> defined at fb3-3.h:19 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:19)
>>>            CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o:(result)
>>> defined at fb3-3.h:19 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:19)
>>>            CMakeFiles/cumtcal.dir/cal/y.tab.c.o:(.bss.result+0x0)

ld: error: duplicate symbol: symtab
>>> defined at fb3-3.h:23 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:23)
>>>            CMakeFiles/cumtcal.dir/cal/fb3-3funcs.c.o:(symtab)
>>> defined at fb3-3.h:23 (D:/CodeField/AndroidCode/CumtCal/app/src/main/cpp/cal\fb3-3.h:23)
>>>            CMakeFiles/cumtcal.dir/cal/y.tab.c.o:(.bss.symtab+0x0)
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.

C++ build system [build] failed while executing:
    @echo off
    "D:\\Software\\AndroidSDK\\cmake\\3.18.1\\bin\\ninja.exe" ^
      -C ^
      "D:\\CodeField\\AndroidCode\\CumtCal\\app\\.cxx\\Debug\\1g5v5a52\\x86" ^
      cumtcal
  from D:\CodeField\AndroidCode\CumtCal\app
	at com.android.build.gradle.internal.cxx.process.ExecuteProcessKt.execute(ExecuteProcess.kt:274)
	at com.android.build.gradle.internal.cxx.process.ExecuteProcessKt$executeProcess$1.invoke(ExecuteProcess.kt:106)
	at com.android.build.gradle.internal.cxx.process.ExecuteProcessKt$executeProcess$1.invoke(ExecuteProcess.kt:104)
	at com.android.build.gradle.internal.cxx.timing.TimingEnvironmentKt.time(TimingEnvironment.kt:32)
	at com.android.build.gradle.internal.cxx.process.ExecuteProcessKt.executeProcess(ExecuteProcess.kt:104)
	at com.android.build.gradle.internal.cxx.process.ExecuteProcessKt.executeProcess$default(ExecuteProcess.kt:84)
	at com.android.build.gradle.internal.cxx.build.CxxRegularBuilder.executeProcessBatch(CxxRegularBuilder.kt:331)
	at com.android.build.gradle.internal.cxx.build.CxxRegularBuilder.build(CxxRegularBuilder.kt:128)
	at com.android.build.gradle.tasks.ExternalNativeBuildTask$doTaskAction$$inlined$recordTaskAction$1.invoke(BaseTask.kt:70)
	at com.android.build.gradle.internal.tasks.Blocks.recordSpan(Blocks.java:51)
	at com.android.build.gradle.tasks.ExternalNativeBuildTask.doTaskAction(ExternalNativeBuildTask.kt:136)
	at com.android.build.gradle.internal.tasks.UnsafeOutputsTask$taskAction$$inlined$recordTaskAction$1.invoke(BaseTask.kt:65)
	at com.android.build.gradle.internal.tasks.Blocks.recordSpan(Blocks.java:51)
	at com.android.build.gradle.internal.tasks.UnsafeOutputsTask.taskAction(UnsafeOutputsTask.kt:61)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:104)
	... 115 more
Caused by: com.android.ide.common.process.ProcessException: Error while executing process D:\Software\AndroidSDK\cmake\3.18.1\bin\ninja.exe with arguments {-C D:\CodeField\AndroidCode\CumtCal\app\.cxx\Debug\1g5v5a52\x86 cumtcal}
	at com.android.build.gradle.internal.process.GradleProcessResult.buildProcessException(GradleProcessResult.java:73)
	at com.android.build.gradle.internal.process.GradleProcessResult.assertNormalExitValue(GradleProcessResult.java:48)
	at com.android.build.gradle.internal.cxx.process.ExecuteProcessKt.execute(ExecuteProcess.kt:269)
	... 132 more
Caused by: org.gradle.process.internal.ExecException: Process 'command 'D:\Software\AndroidSDK\cmake\3.18.1\bin\ninja.exe'' finished with non-zero exit value 1
	at org.gradle.process.internal.DefaultExecHandle$ExecResultImpl.assertNormalExitValue(DefaultExecHandle.java:414)
	at com.android.build.gradle.internal.process.GradleProcessResult.assertNormalExitValue(GradleProcessResult.java:46)
	... 133 more

根据网上所说，原因可能是

  1. 因为两个.c文件都需要引用一个.h文件，所以相当于这个变量被定义了两次。here
  2. （这个说的感觉很对）链接每个.o文件成为最终的可执行文件。出现两个方法声明，异常报错。here

2给出的方法是inline、define和static

对于以上方法：

  1. inline：加上后提示只能在函数中使用
    image-20220319175636452
  2. define：不是函数，好像也不能宏定义
  3. static：修改为如下后确实build不报错了，但是点击运行后，程序就会直接闪退，同样是运行到 calc() 方法就出错
static char* result;
static struct symbol symtab[NHASH];

复现错误最小文件集

CumtCal

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