我在Windows 7上的Python 2.7中安装了SCons 2.2.0。当从cmd运行“scons”时,我收到错误消息“scons无法识别,内部或外部命令”我该如何解决?
问题是scons-2.2.0-setup.exe没有在系统中设置路径。 scons.bat和scons-2.2.0.bat都可以在“C:/ Python27 / Scripts”文件夹中找到。将此设置为路径确实可以解决问题。现在,当尝试编译一个简单的C ++文件并且消息“cl”未被识别为内部或外部命令时,会出现一个新问题。 (Windows 7 64位)。请任何想法可能会有所帮助。
答案 0 :(得分:6)
您是否使用SCons windows installer安装了它?它应该为你设置一切。
根据SCons installation instructions,SCons应安装在此处:
在您的情况下,将c:\Python25
替换为pythong 2.7安装位置。
此外,请确保SCons python脚本在您的路径中。您可能必须重新启动cmd才能使路径更改生效。
答案 1 :(得分:1)
要使用cl,您需要使用Visual Studio命令行,然后从那里运行scons,在Python安装中运行.bat文件和scripts文件夹。将脚本放在您的路径中应该像我最近自己做的那样解决它。
答案 2 :(得分:0)
我安装了2个最新版本(3.0.0和3.0.1)。
同样的问题,也许是因为
Windows安装程序正在 C:/ Program Files ... 中寻找 Python 的安装,它只能找到 Python 3。 x (不兼容)
setup.py
有一个小问题。
无论如何,我提出了以下解决方案。
python setup.py install
将以下文件中的任何一个(或两个)放入子文件夹脚本:
scons.bat
scons
如果您从 Msys 或 Cygwin 我已将这两个脚本的代码放在下面(.bat
是源代码的一部分,.sh
受到启发。)
档案<Python_dir>/Scripts/scons.bat
@REM Copyright (c) 2001 - 2017 The SCons Foundation
@REM src/script/scons.bat rel_3.0.0:4395:8972f6a2f699 2017/09/18 12:59:24 bdbaddog
@echo off
set SCONS_ERRORLEVEL=
if "%OS%" == "Windows_NT" goto WinNT
@REM for 9x/Me you better not have more than 9 args
python -c "from os.path import join; import sys; sys.path = [ join(sys.prefix, 'Lib', 'site-packages', 'scons-3.0.0'), join(sys.prefix, 'Lib', 'site-packages', 'scons'), join(sys.prefix, 'scons-3.0.0'), join(sys.prefix, 'scons')] + sys.path; import SCons.Script; SCons.Script.main()" %1 %2 %3 %4 %5 %6 %7 %8 %9
@REM no way to set exit status of this script for 9x/Me
goto endscons
@REM Credit where credit is due: we return the exit code despite our
@REM use of setlocal+endlocal using a technique from Bear's Journal:
@REM http://code-bear.com/bearlog/2007/06/01/getting-the-exit-code-from-a-batch-file-that-is-run-from-a-python-program/
:WinNT
setlocal
@REM ensure the script will be executed with the Python it was installed for
set path=%~dp0;%~dp0..;%path%
@REM try the script named as the .bat file in current dir, then in Scripts subdir
set scriptname=%~dp0%~n0.py
if not exist "%scriptname%" set scriptname=%~dp0Scripts\%~n0.py
python "%scriptname%" %*
endlocal & set SCONS_ERRORLEVEL=%ERRORLEVEL%
if NOT "%COMSPEC%" == "%SystemRoot%\system32\cmd.exe" goto returncode
if errorlevel 9009 echo you do not have python in your PATH
goto endscons
:returncode
exit /B %SCONS_ERRORLEVEL%
:endscons
call :returncode %SCONS_ERRORLEVEL%
档案<Python_dir>/Scripts/scons
#!/bin/bash
# Script to launch scons from MSys or Cygwin
# Inspired by scons.bat delivered with SCons
# Ensure the script will be executed with the Python it was installed for
BASEDIR=$(dirname "$0")
PATH="$BASEDIR:$BASEDIR/..:$PATH"
# Try the script named as the .bat file in current dir, then in Scripts subdir
BASENAME=$(basename "$0")
SCRIPT=${BASENAME%.*}
SCRIPTNAME="$BASEDIR/$SCRIPT.py"
if ! [ -f "$SCRIPTNAME" ]; then
SCRIPTNAME="$BASEDIR/Scripts/$SCRIPT.py"
fi
# Run
python "$SCRIPTNAME" $@
SCONS_ERRORLEVEL=$?
# Check error code
if [ SCONS_ERRORLEVEL == 9009 ]; then
echo "You do not have python in your PATH"
fi
# End
exit $SCONS_ERRORLEVEL