Re: [edk2-devel] [Patch 0/1] BaseTools: Using compiler to generate source code dependency files.

["Ryszard Knop" <ryszard.knop@linux.intel.com>]

Just a quick note: .d files are used by the D language. You might want 
to use an extension like .deps instead.

On 2019-10-28 11:47, Bob Feng wrote:
> BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2311
>
> To support incremental build, build tool generates the dependent header
> file for each of source file. This procedure is done in AutoGen phase.
> The build tool goes through all the source file and header file and
> use regular expression to find out all the dependent files for a source
> file. This procedure is much time-consuming. And this method can't handle
> the MACRO in #include, for example #include PATH(xxx.h).
>
> This patch is going to use compiler to generate dependent files. This method
> will be faster and more accurate.
>
> The basic idea is:
> 1. In AutoGen phase, build tool add "!Include deps.txt" into Makefile instead
> of defining COMMON_DEPS list.
> 2. During the Make phase, the compilers, Trim and C preprocessor generate
> dependent files, .d file, for each source file.
> 3. After Make, The build tool combines the .d files and generate a file deps.txt
> which list all the included files for a module.
> 4. Each source file will depends on the Module's includes files. The difference
> with orignial behavior is that if the user
> change the source file, build tool will only build that source file in
> incremental build; while if the user change a module's header file, build tool
> will build the whole module in incremental build.
>
> In this way, the time of AutoGen phase will be reduced much. And since we
> will use c preprocessor to handle #include, the MACRO will be handled well
> and the final dependent files will be more accurate.
>
> Feng, Bob C (1):
>    BaseTools: Using compiler to generate source code dependency files.
>
>   BaseTools/Conf/build_rule.template            |  89 ++++++-----
>   BaseTools/Conf/tools_def.template             | 138 +++++++++---------
>   BaseTools/Source/Python/AutoGen/GenMake.py    |  73 +++------
>   .../Source/Python/AutoGen/IncludesAutoGen.py  |  99 +++++++++++++
>   BaseTools/Source/Python/Trim/Trim.py          | 113 +++++++++++---
>   BaseTools/Source/Python/build/build.py        |  58 ++++++--
>   6 files changed, 378 insertions(+), 192 deletions(-)
>   create mode 100644 BaseTools/Source/Python/AutoGen/IncludesAutoGen.py
>