[cfe-commits] r140409 - in /cfe/trunk: docs/tools/clang.pod include/clang/Driver/Options.td lib/Driver/Driver.cpp

[Douglas Gregor]

On Sep 23, 2011, at 1:33 PM, Daniel Dunbar wrote:

> Author: ddunbar
> Date: Fri Sep 23 15:33:41 2011
> New Revision: 140409
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=140409&view=rev
> Log:
> Driver: Add a --working-directory option which can be used to cause the compiler
> to operate "as if" in a certain working directory.
> - For now, we just implement this by changing the actual working directory, but
>   eventually we would want to handle this transparently. This is useful to
>   avoid an extra exec() pair in some situations, and will be something we would
>   want to support for more flexibility in using the Clang libraries.
> 
> Modified:
>    cfe/trunk/docs/tools/clang.pod
>    cfe/trunk/include/clang/Driver/Options.td
>    cfe/trunk/lib/Driver/Driver.cpp
> 
> Modified: cfe/trunk/docs/tools/clang.pod
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/tools/clang.pod?rev=140409&r1=140408&r2=140409&view=diff
> ==============================================================================
> --- cfe/trunk/docs/tools/clang.pod (original)
> +++ cfe/trunk/docs/tools/clang.pod Fri Sep 23 15:33:41 2011
> @@ -407,6 +407,13 @@
> 
> Show commands to run and use verbose output.
> 
> +=item B<--working-directory>
> +
> +Use the given argument as the effective working directory to run the compiler
> +in. This is useful for running the compiler as if in a specific working
> +directory without the overhead of having to change directory using an auxiliary
> +process.
> +
> =back
> 
> 
> 
> Modified: cfe/trunk/include/clang/Driver/Options.td
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=140409&r1=140408&r2=140409&view=diff
> ==============================================================================
> --- cfe/trunk/include/clang/Driver/Options.td (original)
> +++ cfe/trunk/include/clang/Driver/Options.td Fri Sep 23 15:33:41 2011
> @@ -855,6 +855,8 @@
> def _version : Flag<"--version">;
> def _warn__EQ : Joined<"--warn-=">, Alias<W_Joined>;
> def _warn_ : Joined<"--warn-">, Alias<W_Joined>;
> +def _working_directory : Separate<"--working-directory">,
> +    HelpText<"Use the given argument as the effective working directory">;
> def _write_dependencies : Flag<"--write-dependencies">, Alias<MD>;
> def _write_user_dependencies : Flag<"--write-user-dependencies">, Alias<MMD>;
> def _ : Joined<"--">, Flags<[Unsupported]>;

Err… why not make use of the existing option?

def working_directory : Separate<"-working-directory">,
  HelpText<"Resolve file paths relative to the specified directory">;
def working_directory_EQ : Joined<"-working-directory=">,
  Alias<working_directory>;

Introduced in r118203, this teaches the various FileManagers and such to use an alternate working directory.

	- Doug

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