C编译器“ clang.exe”无法编译简单的测试程序

Question

我正在尝试编译用于​​编译C项目库的shell脚本，但是在编译nmake部件时，我却陷入了困境。

我正在使用NDK 21，cmake版本是3.10

我正在使用与此处定义的bash相同的shell脚本，我想压缩此库，因为它们显示在运行./android.sh的文档中

请检查链接：https://github.com/tanersener/mobile-ffmpeg#52-build-scripts

这是随附的日志：

DEBUG: Downloading library source: cpu-features

DEBUG: Checking if cpu-features is already downloaded at /d/Bilals/Projects/GithubProjects/mobile-ffmpeg/src/cpu-features

INFO: cpu-features library already downloaded

INFO: cpu-features already downloaded. Source folder found at /d/Bilals/Projects/GithubProjects/mobile-ffmpeg/src/cpu-features

-- Building for: NMake Makefiles
-- Check for working C compiler: D:/Bilals/PcBackupData/sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/windows-x86_64/bin/clang.exe
CMake Error: Generator: execution of make failed. Make command was: "nmake" "/NOLOGO" "cmTC_adf3f\fast"
-- Check for working C compiler: D:/Bilals/PcBackupData/sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/windows-x86_64/bin/clang.exe -- broken
CMake Error at D:/Bilals/PcBackupData/sdk/cmake/3.10.2.4988404/share/cmake-3.10/Modules/CMakeTestCCompiler.cmake:52 (message):
  The C compiler

    "D:/Bilals/PcBackupData/sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/windows-x86_64/bin/clang.exe"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: D:/Bilals/Projects/GithubProjects/mobile-ffmpeg/android/build/cpu-features/arm/CMakeFiles/CMakeTmp
    
    Run Build Command:"nmake" "/NOLOGO" "cmTC_adf3f\fast"
    The system cannot find the file specified
    Generator: execution of make failed. Make command was: "nmake" "/NOLOGO" "cmTC_adf3f\fast"
    

  

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:9 (project)


-- Configuring incomplete, errors occurred!
See also "D:/Bilals/Projects/GithubProjects/mobile-ffmpeg/android/build/cpu-features/arm/CMakeFiles/CMakeOutput.log".
See also "D:/Bilals/Projects/GithubProjects/mobile-ffmpeg/android/build/cpu-features/arm/CMakeFiles/CMakeError.log".

这是我的环境变量

Answer 1

您应该使用unsigned mask(int a) { int bit; if(!((unsigned)a ^ (unsigned)-1)) return -1; for(bit = sizeof(a)*CHAR_BIT - 1; bit; bit--) { if(((unsigned)a & (1U << bit))) break; } return (1U << (bit + 1)) - 1; } void foo(int a) { printf("prints 1 when any bit of a number equals 0: %d\n", !!((a & mask(a)) ^ mask(a))); } int main(void) { foo(15); } ，而不是Linux Make。一般来说，即使我使用WSL（Ubuntu）bash运行这些脚本，也从未将它们调整为在cygwin或mingw shell的Windows上运行。