无法创建 c++使用 Scons 的 dll

Question

我正在尝试在 Scons 中编译 C++ 程序。对于 c++ 它给出以下错误：

o Untitled_game_godot\bin\win64\libgd.dll -shared -Lgodot-cpp\bin -llibgodot-cpp.windows.debug.64
o not recognized as an internal command

我尝试更改 env.Replace(CXX = "C:/cygwin/bin/") 或者 env.Replace(CXX = "C:/cygwin/bin/g++.exe") 但这没有帮助。

请问有人可以帮我解决这个问题吗？谁知道这件事？

我在下面附加了我的 Scons 文件、工作目录和环境变量

Sconstruct

#!python
import os, subprocess

opts = Variables([], ARGUMENTS)

# Gets the standard flags CC, CCX, etc.
env = DefaultEnvironment(tools = ['g++', 'link'])
#env.Replace(CXX = "compiler/g++.exe")

# Define our options
opts.Add(EnumVariable('target', "Compilation target", 'debug', ['d', 'debug', 'r', 'release']))
opts.Add(EnumVariable('platform', "Compilation platform", '', ['', 'windows', 'x11', 'linux', 'osx']))
opts.Add(EnumVariable('p', "Compilation target, alias for 'platform'", '', ['', 'windows', 'x11', 'linux', 'osx']))
opts.Add(BoolVariable('use_llvm', "Use the LLVM / Clang compiler", 'no'))
opts.Add(PathVariable('target_path', 'The path where the lib is installed.', 'Untitled_game_godot/bin/'))
opts.Add(PathVariable('target_name', 'The library name.', 'libgd', PathVariable.PathAccept))

# Local dependency paths, adapt them to your setup
godot_headers_path = "godot-cpp/godot-headers/"
cpp_bindings_path = "godot-cpp/"
cpp_library = "libgodot-cpp"

# only support 64 at this time..
bits = 64

# Updates the environment with the option variables.
opts.Update(env)

# Process some arguments
if env['use_llvm']:
    env['CC'] = 'clang'
    env['CXX'] = 'clang++'

if env['p'] != '':
    env['platform'] = env['p']

if env['platform'] == '':
    print("No valid target platform selected.")
    quit();

# Check our platform specifics
if env['platform'] == "osx":
    env['target_path'] += 'osx/'
    cpp_library += '.osx'
    if env['target'] in ('debug', 'd'):
        env.Append(CCFLAGS = ['-g','-O2', '-arch', 'x86_64', '-std=c++17'])
        env.Append(LINKFLAGS = ['-arch', 'x86_64'])
    else:
        env.Append(CCFLAGS = ['-g','-O3', '-arch', 'x86_64', '-std=c++17'])
        env.Append(LINKFLAGS = ['-arch', 'x86_64'])

elif env['platform'] in ('x11', 'linux'):
    env['target_path'] += 'x11/'
    cpp_library += '.linux'
    if env['target'] in ('debug', 'd'):
        env.Append(CCFLAGS = ['-fPIC', '-g3','-Og', '-std=c++17'])
    else:
        env.Append(CCFLAGS = ['-fPIC', '-g','-O3', '-std=c++17'])

elif env['platform'] == "windows":
    env['target_path'] += 'win64/'
    cpp_library += '.windows'
    # This makes sure to keep the session environment variables on windows,
    # that way you can run scons in a vs 2017 prompt and it will find all the required tools
    env.Append(ENV = os.environ)

    env.Append(CCFLAGS = ['-DWIN32', '-D_WIN32', '-D_WINDOWS', '-W3', '-GR', '-D_CRT_SECURE_NO_WARNINGS'])
    if env['target'] in ('debug', 'd'):
        env.Append(CCFLAGS = ['-EHsc', '-D_DEBUG', '-MDd'])
    else:
        env.Append(CCFLAGS = ['-O2', '-EHsc', '-DNDEBUG', '-MD'])

if env['target'] in ('debug', 'd'):
    cpp_library += '.debug'
else:
    cpp_library += '.release'

cpp_library += '.' + str(bits)

# make sure our binding library is properly includes
env.Append(CPPPATH=['.', godot_headers_path, cpp_bindings_path + 'include/', cpp_bindings_path + 'include/core/', cpp_bindings_path + 'include/gen/'])
env.Append(LIBPATH=[cpp_bindings_path + 'bin/'])
env.Append(LIBS=[cpp_library])

# tweak this if you want to use different folders, or more folders, to store your source code in.
env.Append(CPPPATH=['src/'])
sources = Glob('src/*.cpp')

library = env.SharedLibrary(target=env['target_path'] + env['target_name'] , source=sources)

Default(library)

# Generates help for the -h scons option.
Help(opts.GenerateHelpText(env))

工作树

.
├── Untitled_game_godot
│   ├── UI
│   │   └── main_menu
│   └── bin
│       └── win64
└── godot-cpp
    ├── __pycache__
    ├── bin
    ├── godot-headers
    │   ├── android
    │   ├── arvr
    │   ├── gdnative
    │   ├── images
    │   │   └── faq
    │   ├── nativescript
    │   ├── net
    │   ├── pluginscript
    │   └── videodecoder
    ├── include
    │   ├── core
    │   └── gen
    ├── misc
    │   ├── ci
    │   ├── hooks
    │   └── scripts
    ├── src
    │   ├── core
    │   └── gen
    └── test
        └── src

所有环境变量：

ALLUSERSPROFILE=C:\ProgramData
APPDATA=C:\Users\mihac\AppData\Roaming
CL=C:\cygwin64\bin\cl.exe
CommandPromptType=Native
CommonProgramFiles=C:\Program Files\Common Files
CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files
CommonProgramW6432=C:\Program Files\Common Files
COMPUTERNAME=DESKTOP-257N8M8
ComSpec=C:\Windows\system32\cmd.exe
DevEnvDir=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\
DriverData=C:\Windows\System32\Drivers\DriverData
ExtensionSdkDir=C:\Program Files (x86)\Microsoft SDKs\Windows Kits\10\ExtensionSDKs
Framework40Version=v4.0
FrameworkDir=C:\Windows\Microsoft.NET\Framework64\
FrameworkDir64=C:\Windows\Microsoft.NET\Framework64\
FrameworkVersion=v4.0.30319
FrameworkVersion64=v4.0.30319
HOMEDRIVE=C:
HOMEPATH=\Users\mihac
HTMLHelpDir=C:\Program Files (x86)\HTML Help Workshop
INCLUDE=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\ATLMFC\include;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\include;C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um;C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt;C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\shared;C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\um;C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\winrt;C:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\cppwinrt
LIB=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\ATLMFC\lib\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\lib\x64;C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\lib\um\x64;C:\Program Files (x86)\Windows Kits\10\lib\10.0.18362.0\ucrt\x64;C:\Program Files (x86)\Windows Kits\10\lib\10.0.18362.0\um\x64
LIBPATH=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\ATLMFC\lib\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\lib\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\lib\x86\store\references;C:\Program Files (x86)\Windows Kits\10\UnionMetadata\10.0.18362.0;C:\Program Files (x86)\Windows Kits\10\References\10.0.18362.0;C:\Windows\Microsoft.NET\Framework64\v4.0.30319
LOCALAPPDATA=C:\Users\mihac\AppData\Local
LOGONSERVER=\\DESKTOP-257N8M8
NETFXSDKDir=C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\
NUMBER_OF_PROCESSORS=12
OneDrive=C:\Users\mihac\OneDrive
OneDriveConsumer=C:\Users\mihac\OneDrive
OS=Windows_NT
Path=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\\Extensions\Microsoft\IntelliCode\CLI;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\bin\HostX64\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\VC\VCPackages;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\TestWindow;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\TeamFoundation\Team Explorer;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\bin\Roslyn;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Team Tools\Performance Tools\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Team Tools\Performance Tools;C:\Program Files (x86)\Microsoft Visual Studio\Shared\Common\VSPerfCollectionTools\vs2019\\x64;C:\Program Files (x86)\Microsoft Visual Studio\Shared\Common\VSPerfCollectionTools\vs2019\;C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\x64\;C:\Program Files (x86)\HTML Help Workshop;C:\Program Files (x86)\Windows Kits\10\bin\10.0.18362.0\x64;C:\Program Files (x86)\Windows Kits\10\bin\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\\MSBuild\Current\Bin;C:\Windows\Microsoft.NET\Framework64\v4.0.30319;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\Tools\;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\NVIDIA Corporation\NVIDIA NvDLISR;C:\Program Files\Git\cmd;D:\Apps\bin;C:\Program Files (x86)\dotnet\;C:\Users\mihac\AppData\Local\Programs\Python\Python310;C:\Users\mihac\AppData\Local\Programs\Python\Python310\Scripts;C:\Users\mihac\AppData\Local\Programs\Python\Python310\Scripts\;C:\Users\mihac\AppData\Local\Programs\Python\Python310\;C:\Users\mihac\AppData\Local\Microsoft\WindowsApps;C:\Users\mihac\AppData\Local\Programs\Microsoft VS Code\bin;D:\Apps\php5;D:\Apps\php5\ext;C:\cygwin64\bin;;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin;C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\Ninja
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
Platform=x64
PROCESSOR_ARCHITECTURE=AMD64
PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 158 Stepping 10, GenuineIntel
PROCESSOR_LEVEL=6
PROCESSOR_REVISION=9e0a
ProgramData=C:\ProgramData
ProgramFiles=C:\Program Files
ProgramFiles(x86)=C:\Program Files (x86)
ProgramW6432=C:\Program Files
PROMPT=$P$G
PSModulePath=C:\Program Files\WindowsPowerShell\Modules;C:\Windows\system32\WindowsPowerShell\v1.0\Modules
PUBLIC=C:\Users\Public
PYTHONPATH=C:\Users\mihac\AppData\Local\Programs\Python\Python310
SESSIONNAME=Console
SystemDrive=C:
SystemRoot=C:\Windows
TEMP=C:\Users\mihac\AppData\Local\Temp
TMP=C:\Users\mihac\AppData\Local\Temp
UCRTVersion=10.0.18362.0
UniversalCRTSdkDir=C:\Program Files (x86)\Windows Kits\10\
USERDOMAIN=DESKTOP-257N8M8
USERDOMAIN_ROAMINGPROFILE=DESKTOP-257N8M8
USERNAME=mihac
USERPROFILE=C:\Users\mihac
VCIDEInstallDir=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\VC\
VCINSTALLDIR=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\
VCToolsInstallDir=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\
VCToolsRedistDir=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Redist\MSVC\14.28.29325\
VCToolsVersion=14.28.29333
VisualStudioVersion=16.0
VS160COMNTOOLS=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\Tools\
VSCMD_ARG_app_plat=Desktop
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VSCMD_ARG_TGT_ARCH=x64
VSCMD_VER=16.8.3
VSINSTALLDIR=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\
windir=C:\Windows
WindowsLibPath=C:\Program Files (x86)\Windows Kits\10\UnionMetadata\10.0.18362.0;C:\Program Files (x86)\Windows Kits\10\References\10.0.18362.0
WindowsSdkBinPath=C:\Program Files (x86)\Windows Kits\10\bin\
WindowsSdkDir=C:\Program Files (x86)\Windows Kits\10\
WindowsSDKLibVersion=10.0.18362.0\
WindowsSdkVerBinPath=C:\Program Files (x86)\Windows Kits\10\bin\10.0.18362.0\
WindowsSDKVersion=10.0.18362.0\
WindowsSDK_ExecutablePath_x64=C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\x64\
WindowsSDK_ExecutablePath_x86=C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\
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Answer 1

如果您想使用 Cygwin 的编译器在 Windows 上构建，则需要通过 Cygwin 的 python 从 Cygwin 的 shell 运行 SCons。

否则，它默认使用 Windows 编译器、文件路径分隔符等。

还有一个旁注，最好调用

env = Environment(tools = ['g++', 'link'])

And not

env = DefaultEnvironment(tools = ['g++', 'link'])

Also，如果您想在 cygwin 上构建，您还需要更改许多其他项目。

如果您在 Windows 平台上进行构建，那么使用 mingw 或 msvc 可能会更好。