recastnavigation编译Android库失败

errorfun

使用的最新master上的 RecastDll,首先发现的问题如下

CMakeList.txt里面引用的头文件和CPP路径要把去掉的 ../给加回去，否则无法编译
修改完这一步Win64的库已正常编译成功。使用的vs2022
Android找不到 rand()函数，给加了个宏处理

 `/* On Android NDK, rand is inlined function, but postproc needs rand symbol */`
   `#if defined(__ANDROID__) `
   `#define rand __rand `
   `#include <stdlib.h> `
   `#undef rand `
   `  `
   `extern int rand(void) `
   `{ `
   `  return __rand(); `
   `} `
   `#else `
   `/* ISO C forbids an empty translation unit. */`
   `int vp8_unused; `
   `#endif`

需要使用NDK-R10E,vs2022里要设置目录，并且 llvm 在vs2022环境下目录不对，将 llvm3.6给改了目录名为 llvm
到这一步后就卡住了，不知道如何解决，编译信息如下：

   `-- Configuring done`
   `-- Generating done`
   `-- Build files have been written to: E:/unity/proj/recastnavigation/RecastDll/build_v7a`
   `用于 .NET Framework 的 Microsoft (R) 生成引擎版本 17.1.0+ae57d105c`
   `版权所有(C) Microsoft Corporation。保留所有权利。`
   `  ANDROID_HOME=E:\unity\tools\android-sdk`
   `  ANT_HOME=D:\Program Files\Microsoft Visual Studio\2022\Community\Apps\apache-ant-1.9.3`
   `  JAVA_HOME=C:\Program Files\Android\jdk\jdk-8.0.302.8-hotspot\jdk8u302-b08`
   `  NDK_ROOT=E:\unity\tools\android-ndk-r10e`
   `  ANDROID_HOME=E:\unity\tools\android-sdk`
   `  ANT_HOME=D:\Program Files\Microsoft Visual Studio\2022\Community\Apps\apache-ant-1.9.3`
   `  JAVA_HOME=C:\Program Files\Android\jdk\jdk-8.0.302.8-hotspot\jdk8u302-b08`
   `  NDK_ROOT=E:\unity\tools\android-ndk-r10e`
   `  InvokeHelper.cpp`
   `E:\unity\proj\recastnavigation\RecastDll\Source\InvokeHelper.cpp(94,18): warning : unused variable 'MAX_SMOOTH' [-Wunus`
   `ed-const-variable] [E:\unity\proj\recastnavigation\RecastDll\build_v7a\RecastDll.vcxproj]`
   `  static const int MAX_SMOOTH = 2048;`
   `                   ^`
   `  1 warning generated.`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourAlloc.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourAssert.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourCommon.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourNavMesh.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourNavMeshBuilder.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourNavMeshQuery.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourNode.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourCrowd.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourLocalBoundary.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourObstacleAvoidance.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourPathCorridor.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourPathQueue.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourProximityGrid.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourTileCache.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\DetourTileCacheBuilder.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\Recast.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`
   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\RecastAlloc.o: incompatible target`
   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`

   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\RecastArea.o: incompatible target`

   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`

   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\RecastAssert.o: incompatible target`

   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`

   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\RecastContour.o: incompatible target`

   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`

   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\RecastFilter.o: incompatible target`

   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`

   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\RecastLayers.o: incompatible target`

   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`

   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\RecastMesh.o: incompatible target`

   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`

   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\RecastMeshDetail.o: incompatible target`

   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`

   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\RecastRasterization.o: incompatible target`

   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`

   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\RecastRegion.o: incompatible target`

   `  E:\unity\tools\android-ndk-r10e\toolchains\x86_64-4.9\prebuilt\windows-x86_64/lib/gcc/x86_64-linux-android/4.9/../../`

   `  ../../x86_64-linux-android/bin\ld.exe: error: RecastDll.dir\Release\InvokeHelper.o: incompatible target`

   `  clang.exe: error: linker command failed with exit code 1 (use -v to see invocation)`

   `D:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Application Type\Android\3.0\Android.`

   `Common.targets(119,5): error MSB6006: “clang.exe”已退出，代码为 1。 [E:\unity\proj\recastnavigation\RecastDll\build_v7a\RecastD`

   `ll.vcxproj]`

cheny

errorfun 原因找到了吗

hoho

在mac编译遇到类似的问题：ios和 macos都可以打包成功，打包android时就一直失败，不过错误提示是RecastAlloc.h文件中的INTPTR_MAX未定义。后来查了下linux环境，INTPTR_MAX似乎linux本身就有的（见https://blog.csdn.net/wallwind/article/details/7792913）。

我就直接RecastAlloc.h头文件里手动添加了#define INTPTR_MAX 0×7fffffff ，然后重新编译，结果成功了。不知否有参考价值😂

errorfun

hoho windows下好像不需要加这个，加了会提示重复，不是这个原因