Re: [Patch] BaseTools/DscBuildData: Fix PCD autogen include file conflict

["Michael D Kinney" <michael.d.kinney@intel.com>]

Liming,

The build tools would need to know which env var to query for 
all OS/host tool chain combinations and how to parse that
information for full paths in an OS specific manner. We should
not build that type of information into the build tools.

The fix I have provided does not need this information.

Mike

> -----Original Message-----
> From: Gao, Liming <liming.gao@intel.com>
> Sent: Sunday, February 2, 2020 4:59 PM
> To: Kinney, Michael D <michael.d.kinney@intel.com>;
> devel@edk2.groups.io
> Cc: Feng, Bob C <bob.c.feng@intel.com>
> Subject: RE: [Patch] BaseTools/DscBuildData: Fix PCD
> autogen include file conflict
> 
> Mike:
>   Can we consider to parse INCLUDE env value and add
> those path to -I options as the first priority?
> 
> Thanks
> Liming
> > -----Original Message-----
> > From: Kinney, Michael D <michael.d.kinney@intel.com>
> > Sent: Thursday, January 30, 2020 8:46 AM
> > To: devel@edk2.groups.io
> > Cc: Feng, Bob C <bob.c.feng@intel.com>; Gao, Liming
> <liming.gao@intel.com>
> > Subject: [Patch] BaseTools/DscBuildData: Fix PCD
> autogen include file conflict
> >
> > https://bugzilla.tianocore.org/show_bug.cgi?id=2494
> >
> > When using structured PCDs, a C application is auto
> generated
> > to fill in the structured PCD value.  The C
> application uses
> > the standard include files <stdio.h>, <stdlib.h>, and
> <string.h>.
> > This C application also supports include paths from
> package DEC
> > files when a structured PCD declaration provides a
> <Packages>
> > list.  The complete list of include paths are -I
> options for
> > include paths from package DEC files and the
> compiler's standard
> > include paths.
> >
> > -I include paths are higher priority than the
> standard include
> > paths.  If the -I included paths from package DEC
> files contain
> > <stdio.h>, <stdlib.h>, or <string.h> the wrong
> include files are
> > used to compile the C application for the structured
> PCD value.
> >
> > Update GenerateByteArrayValue() to skip a package DEC
> include
> > paths that contain <stdio.h>, <stdlib.h>, or
> <string.h>.
> >
> > Build failures were observed when adding a structured
> PCD to
> > CryptoPkg.  CryptoPkg contains <stdio.h>, <stdlib.h>,
> and
> > <string.h> in the path CryptoPkg/Library/Include to
> support
> > building Open SSL.  The Library/Include path is
> listed as a
> > private include path in CryptoPkg.dec.  Without this
> change, the
> > standard include files designed to support build
> OpenSLL are
> > used to build the structured PCD C application, and
> that build
> > fails.
> >
> > Other packages that provide a standard C lib or a
> gasket for
> > a subset of the standard C lib will run into this
> same issue
> > if they also define and use a Structured PCD.  So
> this issue
> > is not limited to the CryptoPkg.
> >
> > Cc: Bob Feng <bob.c.feng@intel.com>
> > Cc: Liming Gao <liming.gao@intel.com>
> > Signed-off-by: Michael D Kinney
> <michael.d.kinney@intel.com>
> > ---
> >  .../Source/Python/Workspace/DscBuildData.py    | 18
> +++++++++++++++++-
> >  1 file changed, 17 insertions(+), 1 deletion(-)
> >
> > diff --git
> a/BaseTools/Source/Python/Workspace/DscBuildData.py
> b/BaseTools/Source/Python/Workspace/DscBuildData.py
> > index c65a0dd346..be6688dc75 100644
> > ---
> a/BaseTools/Source/Python/Workspace/DscBuildData.py
> > +++
> b/BaseTools/Source/Python/Workspace/DscBuildData.py
> > @@ -1,7 +1,7 @@
> >  ## @file
> >  # This file is used to create a database used by
> build tool
> >  #
> > -# Copyright (c) 2008 - 2019, Intel Corporation. All
> rights reserved.<BR>
> > +# Copyright (c) 2008 - 2020, Intel Corporation. All
> rights reserved.<BR>
> >  # (C) Copyright 2016 Hewlett Packard Enterprise
> Development LP<BR>
> >  # SPDX-License-Identifier: BSD-2-Clause-Patent
> >  #
> > @@ -2667,6 +2667,22 @@ class
> DscBuildData(PlatformBuildClassObject):
> >              for pkg in PcdDependDEC:
> >                  if pkg in PlatformInc:
> >                      for inc in PlatformInc[pkg]:
> > +                        #
> > +                        # Get list of files in
> potential -I include path
> > +                        #
> > +                        FileList = os.listdir
> (str(inc))
> > +                        #
> > +                        # Skip -I include path if
> one of the include files required
> > +                        # by PcdValueInit.c are
> present in the include paths from
> > +                        # the DEC file.
> PcdValueInit.c must use the standard include
> > +                        # files from the host
> compiler.
> > +                        #
> > +                        if 'stdio.h' in FileList:
> > +                          continue
> > +                        if 'stdlib.h' in FileList:
> > +                          continue
> > +                        if 'string.h' in FileList:
> > +                          continue
> >                          MakeApp += '-I'  + str(inc)
> + ' '
> >                          IncSearchList.append(inc)
> >          MakeApp = MakeApp + '\n'
> > --
> > 2.21.0.windows.1