[edk2-devel] [Patch 0/4 V6] Enhance Incremental Build
Bob Feng
bob.c.feng at intel.com
Tue Dec 10 01:40:53 UTC 2019
Pushed 13c5e34a ~ 0c3e8e99
Thanks,
Bob
-----Original Message-----
From: Gao, Liming
Sent: Monday, December 9, 2019 7:35 AM
To: devel at edk2.groups.io; Feng, Bob C <bob.c.feng at intel.com>
Subject: RE: [edk2-devel] [Patch 0/4 V6] Enhance Incremental Build
Reviewed-by: Liming Gao <liming.gao at intel.com>
> -----Original Message-----
> From: devel at edk2.groups.io <devel at edk2.groups.io> On Behalf Of Bob
> Feng
> Sent: Friday, December 6, 2019 11:27 PM
> To: devel at edk2.groups.io
> Subject: [edk2-devel] [Patch 0/4 V6] Enhance Incremental Build
>
> V6: Add notes for RVCT tool chain that it is not enabled incremental
> build feature
> V5: Document how to enable or disable dependency file list generation
> for a tool chain.
> V4: Move .deps files to where corresponding .obj file locate
> V3: Change CLANG9 to CLANGPDB according to commit 14672c34bd
> V2: Fixed a bug in patch 4/4.
>
> Incremental build reduces the build time by only building the module
> that need to update. Edk2 Build system is a Makefile based build
> system. The incrememtal build ability is provided by the Make program.
> But Edk2 build tool need to generate correct makefile to have Make
> program do incremental build correctly.
>
> The current solution in build tool to support incremental build is
> that build tool find out the include file list for each source file of
> a module, and in module's makefile, build tool add the include file list as the source file's dependency.
> In this way Make program can decide if it need to rebuild a source
> code by checking its dependency. This solution has 2 shortcommings,
> one is the process of finding include list is slow, the other is this
> method can't handle case that a MACRO in #include statement so the related source file is always built.
>
> This patch provides another method to support incremental build. That
> is to use c preprocessor and trim tool to generate dependency files for the source file.
> This method will save much time in AutoGen phase and handle MACRO in #include correctly.
>
> For C files:
> 1. MSVS.
> cl.exe has a build option /showIncludes to display include files on stdout. Build tool captures
> that messages and generate dependency files, .deps files.
> 2. CLANG and GCC
> -MMD -MF build option are used to generate dependency files by preprocessor. Build tool updates the
> .deps files.
>
> For ASL files:
> 1. Trim find out all the included files, which are asl specific include format, and generate .trim.deps file.
> 2. ASL PP use c preprocessor to find out all included files with #include format and generate a .deps file
> 3. build tool updates the .deps file
>
> For ASM files (.asm, .s or .nasm):
> 1. Trim find out all the included files, which are asm specific include format, and generate .trim.deps file.
> 2. ASM PP use c preprocessor to find out all included files with #include format and generate a deps file
> 3. build tool updates the .deps file
>
> Build tool add "include" instruction for those deps files in the Makefile.
>
> This patch does not support RVCT tool chain for the BZ
> https://bugzilla.tianocore.org/show_bug.cgi?id=1750
>
> Feng, Bob C (4):
> BaseTools: Add build option for dependency file generation
> BaseTools: Generate dependent files for ASL and ASM files
> BaseTools: Update build_rule.txt to generate dependent files.
> BaseTools: Enhance Basetool for incremental build
>
> BaseTools/Conf/build_rule.template | 94 ++++---
> BaseTools/Conf/tools_def.template | 173 ++++++------
> BaseTools/Source/Python/AutoGen/GenMake.py | 83 ++----
> .../Source/Python/AutoGen/IncludesAutoGen.py | 255 ++++++++++++++++++
> .../Source/Python/AutoGen/ModuleAutoGen.py | 23 ++
> BaseTools/Source/Python/Trim/Trim.py | 115 ++++++--
> BaseTools/Source/Python/build/build.py | 63 ++++-
> 7 files changed, 588 insertions(+), 218 deletions(-) create mode
> 100644 BaseTools/Source/Python/AutoGen/IncludesAutoGen.py
>
> --
> 2.20.1.windows.1
>
>
>
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