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PCbuild/build.bat: Add note about using msbuild response file. (#1551) 

Using a response file will eliminate the headache associated with batch argument/quote processing.

For example I unsucessfully compiled python with visualcpptools when specifying VSInstallDir in the batch file (cannot find vcruntime.h)

```batch
build.bat -p x64 -e -M --no-tkinter  "/p:VCInstallDir=%VCInstallDir%"
```

but it build successfully when specifying it in a response file

msbuild.rsp:
```
/p:VCInstallDir=%VCInstallDir%
```
This commit is contained in:
Charles 2017-05-13 06:23:15 +07:00 committed by Steve Dower
parent 870f6a11dd
commit 8619c5417c
1 changed files with 6 additions and 1 deletions
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7
PCbuild/build.bat
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@ -10,7 +10,12 @@ echo.given.
echo.
echo.After the flags recognized by this script, up to 9 arguments to be passed
echo.directly to MSBuild may be passed. If the argument contains an '=', the
echo.entire argument must be quoted (e.g. `%~nx0 "/p:PlatformToolset=v100"`)
echo.entire argument must be quoted (e.g. `%~nx0 "/p:PlatformToolset=v100"`).
echo.Alternatively you can put extra flags for MSBuild in a file named
echo.`msbuild.rsp` in the `PCbuild` directory, one flag per line. This file
echo.will be picked automatically by MSBuild. Flags put in this file does not
echo.need to be quoted. You can still use environment variables inside the
echo.response file.
echo.
echo.Available flags:
echo. -h Display this help message