Anyway I think Leif and I agree the toolchain name is very confusing. I'd rather see it called CLANG9_WIN or CLANG_PDB.

On Oct 18, 2019, at 7:27 AM, Liming Gao <liming.gao@intel.com> wrote:

Andrew:
Here is the cover letter on CLANG9 introduction. https://edk2.groups.io/g/devel/message/49157

1) Yes. CLANG9 tool chain is added to directly generate PE/COFF image (EFI image).
This tool chain uses LLVM clang C compiler and lld linker, generates PE/COFF
image and PDB compatible debug symbol format. Now, it supports IA32/X64 Archs.
LLVM clang C compiler and lld linker are the standalone tool set. They don’t depend other lib to generate PE/COFF image.

2) Yes. CLANG9 is the cross OS tool chain. It can work on Windows/Linux/Mac host OS.
LLVM LLD linker uses Windows style arguments. I verify CLANG9 for Ovmf3264 in Windows/Linux host OS.

On Linux can you source level debug Ovmf?

3) This patch enables WinHost in Windows. It doesn’t enable UnixHost. Now, EmulatorPkg with CLANG9 only works on Windows Host.
This patch can make other modules pass build in Windows/Linux/Mac only if LLVM9 tool set is installed.
But, the generated image may not work on Linux/Mac. I agree below linker flags are specific to windows host.
So, I suggest to add the conditional statement of $(WIN_HOST_BUILD) == TRUE for them.

For the EmulatorPkg the Host is a native App for that OS you build on, but it seems like CLANG9 is targeted to build Windows Apps. I'm not sure but you might be able to override all the linker commands to build a native app, or just use the system linker for the Host?

I'm not sure how well debugging will work mixing PDB and DWARF symbol formats?

Thanks,

Andrew Fish

!if $(WIN_HOST_BUILD) == TRUE
GCC:*_CLANG9_*_DLINK_FLAGS     = /ALIGN:4096 /FILEALIGN:4096 /SUBSYSTEM:CONSOLE
GCC:DEBUG_CLANG9_*_DLINK_FLAGS = /EXPORT:InitializeDriver=$(IMAGE_ENTRY_POINT) /BASE:0x10000
GCC:NOOPT_CLANG9_*_DLINK_FLAGS = /EXPORT:InitializeDriver=$(IMAGE_ENTRY_POINT) /BASE:0x10000
!endif

Thanks
Liming
From: afish@apple.com <afish@apple.com>
Sent: Friday, October 18, 2019 1:15 AM
To: Ni, Ray <ray.ni@intel.com>
Cc: Gao, Liming <liming.gao@intel.com>; devel@edk2.groups.io; Justen, Jordan L <jordan.l.justen@intel.com>
Subject: Re: [Patch v3 10/11] EmulatorPkg: Enable CLANG9 tool chain

Ray,

Sorry I'm coming a little late to this and I'm confused. I have some questions?
1) Does CLANG9 imply CLANGPE?
2) Does CLANGPE work on Linux and macOS? Can you pass the Windows style arguments to CLANGPE linker on Linux and macOS?
3) For the EmulatorPkg don't you have the extra requirement that compiler needs a standard C lib (or platform specific libs) to function?
       a) GCC:*_CLANG9_*_DLINK_FLAGS in EmulatorPkg.dsc seems to imply the Linux and macOS systems will have a Windows SKD dir and a lot of Windows DLLs? Does all that come when you install CLANG9 when you install it on Linux or macOS?

So I guess I'm asking is the linker really the same for CLANG9 on all systems? I guess the answer could be yes, but it seems the C lib for the Host App is still an App for that OS and is OS dependent?

Sorry if I'm missing something fundamental and this is a dumb question.

Thanks,

Andrew Fish

On Oct 17, 2019, at 12:27 AM, Ni, Ray <ray.ni@intel.com> wrote:

Liming,
Emulator is using a generic SEC module. The host specific module is called "Host".
So I prefer to change the macro to "WIN_HOST_BUILD", with this change, Reviewed-by: Ray Ni <ray.ni@intel.com>

-----Original Message-----
From: Gao, Liming <liming.gao@intel.com>
Sent: Thursday, October 17, 2019 2:56 PM
To: devel@edk2.groups.io
Cc: Justen, Jordan L <jordan.l.justen@intel.com>; Andrew Fish
<afish@apple.com>; Ni, Ray <ray.ni@intel.com>
Subject: [Patch v3 10/11] EmulatorPkg: Enable CLANG9 tool chain

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1603
1. Add WIN_SEC_BUILD macro check for CLANG9 tool chain build -p
EmulatorPkg\EmulatorPkg.dsc -a IA32 -DWIN_SEC_BUILD=TRUE -t CLANG9
build -p EmulatorPkg\EmulatorPkg.dsc -a X64 -DWIN_SEC_BUILD=TRUE -t
CLANG9 2. Append CLANG CC and LINK flags to generate windows HOST.
3. Fix WinHost issue to call GetProcessAffinityMask() API.
  The input parameter should be UINTN pointer instead of UINT32 pointer.

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Andrew Fish <afish@apple.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Liming Gao <liming.gao@intel.com>
---
EmulatorPkg/Win/Host/WinHost.c   | 6 +++---
EmulatorPkg/EmulatorPkg.dsc      | 7 ++++++-
EmulatorPkg/Win/Host/WinHost.inf | 6 ++++++
3 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/EmulatorPkg/Win/Host/WinHost.c
b/EmulatorPkg/Win/Host/WinHost.c index 9aba3c8959..e40ce32548 100644
--- a/EmulatorPkg/Win/Host/WinHost.c
+++ b/EmulatorPkg/Win/Host/WinHost.c
@@ -356,7 +356,7 @@ Returns:
INTN
EFIAPI
main (
- IN INTN Argc,
+ IN INT Argc,
  IN CHAR8 **Argv,
  IN CHAR8 **Envp
  )
@@ -391,8 +391,8 @@ Returns:
  VOID                  *SecFile;
  CHAR16                *MemorySizeStr;
  CHAR16                *FirmwareVolumesStr;
- UINT32                ProcessAffinityMask;
- UINT32                SystemAffinityMask;
+ UINTN                 ProcessAffinityMask;
+ UINTN                 SystemAffinityMask;
  INT32                 LowBit;

  //
diff --git a/EmulatorPkg/EmulatorPkg.dsc b/EmulatorPkg/EmulatorPkg.dsc
index 20f1187713..72532f5daf 100644
--- a/EmulatorPkg/EmulatorPkg.dsc
+++ b/EmulatorPkg/EmulatorPkg.dsc
@@ -237,9 +237,10 @@

[Components]
!if "IA32" in $(ARCH) || "X64" in $(ARCH)
- !if "MSFT" in $(FAMILY)
+ !if "MSFT" in $(FAMILY) || $(WIN_SEC_BUILD) == TRUE
    ##
    # Emulator, OS WIN application
+    # CLANG9 is cross OS tool chain. It depends on WIN_SEC_BUILD macro.
    ##
    EmulatorPkg/Win/Host/WinHost.inf
  !else
@@ -419,7 +420,11 @@

  MSFT:DEBUG_*_*_CC_FLAGS = /Od /Oy-
  MSFT:NOOPT_*_*_CC_FLAGS = /Od /Oy-
+ GCC:DEBUG_CLANG9_*_CC_FLAGS =-O0 -Wno-unused-command-line-
argument
+ -Wno-incompatible-pointer-types -Wno-enum-conversion
+ -Wno-incompatible-pointer-types -Wno-sometimes-uninitialized
+ -Wno-constant-conversion -Wno-main-return-type

  MSFT:*_*_*_DLINK_FLAGS     = /ALIGN:4096 /FILEALIGN:4096
/SUBSYSTEM:CONSOLE
  MSFT:DEBUG_*_*_DLINK_FLAGS =
/EXPORT:InitializeDriver=$(IMAGE_ENTRY_POINT) /BASE:0x10000
  MSFT:NOOPT_*_*_DLINK_FLAGS =
/EXPORT:InitializeDriver=$(IMAGE_ENTRY_POINT) /BASE:0x10000
+ GCC:*_CLANG9_*_DLINK_FLAGS     = /ALIGN:4096 /FILEALIGN:4096
/SUBSYSTEM:CONSOLE
+ GCC:DEBUG_CLANG9_*_DLINK_FLAGS =
+ /EXPORT:InitializeDriver=$(IMAGE_ENTRY_POINT) /BASE:0x10000
+ GCC:NOOPT_CLANG9_*_DLINK_FLAGS =
+ /EXPORT:InitializeDriver=$(IMAGE_ENTRY_POINT) /BASE:0x10000
diff --git a/EmulatorPkg/Win/Host/WinHost.inf
b/EmulatorPkg/Win/Host/WinHost.inf
index 631d5a6470..1adca10d79 100644
--- a/EmulatorPkg/Win/Host/WinHost.inf
+++ b/EmulatorPkg/Win/Host/WinHost.inf
@@ -95,3 +95,9 @@
  MSFT:*_VS2017_X64_DLINK_FLAGS      =
/LIBPATH:"%VCToolsInstallDir%lib\x64"
/LIBPATH:"%UniversalCRTSdkDir%lib\%UCRTVersion%\ucrt\x64"
/LIBPATH:"%WindowsSdkDir%lib\%WindowsSDKLibVersion%\um\x64"
/NOLOGO /SUBSYSTEM:CONSOLE /NODEFAULTLIB /IGNORE:4086 /MAP
/OPT:REF /DEBUG /MACHINE:AMD64 /LTCG Kernel32.lib MSVCRTD.lib
vcruntimed.lib ucrtd.lib Gdi32.lib User32.lib Winmm.lib Advapi32.lib
  MSFT:*_*_X64_ASM_FLAGS            == /nologo /W3 /WX /c /Cx /Zd /W0 /Zi
  MSFT:*_*_X64_ASMLINK_FLAGS        == /link /nologo
+
+ GCC:*_CLANG9_X64_DLINK_FLAGS ==
/out:"$(BIN_DIR)\$(BASE_NAME).exe" /base:0x10000000
/pdb:"$(BIN_DIR)\$(BASE_NAME).pdb"
/LIBPATH:"%UniversalCRTSdkDir%lib\%UCRTVersion%\ucrt\x64"
/LIBPATH:"%WindowsSdkDir%lib\%WindowsSDKLibVersion%\um\x64"
/LIBPATH:"%VCToolsInstallDir%lib\x64"   /NOLOGO /SUBSYSTEM:CONSOLE
/NODEFAULTLIB /IGNORE:4086 /OPT:REF /DEBUG /MACHINE:AMD64
Kernel32.lib MSVCRTD.lib vcruntimed.lib ucrtd.lib Gdi32.lib User32.lib
Winmm.lib Advapi32.lib /lldmap
/EXPORT:InitializeDriver=_ModuleEntryPoint
+ GCC:*_CLANG9_X64_CC_FLAGS == -m64 -g -fshort-wchar
+ -fno-strict-aliasing -Wall -c -include AutoGen.h -D
+ _CRT_SECURE_NO_WARNINGS -Wnonportable-include-path -D UNICODE
-D
+ _CRT_SECURE_NO_DEPRECATE
+
+ GCC:*_CLANG9_IA32_DLINK_FLAGS ==
/out:"$(BIN_DIR)\$(BASE_NAME).exe" /base:0x10000000
/pdb:"$(BIN_DIR)\$(BASE_NAME).pdb"
/LIBPATH:"%UniversalCRTSdkDir%lib\%UCRTVersion%\ucrt\x86"
/LIBPATH:"%WindowsSdkDir%lib\%WindowsSDKLibVersion%\um\x86"
/LIBPATH:"%VCToolsInstallDir%ib\x86"   /NOLOGO /SUBSYSTEM:CONSOLE
/NODEFAULTLIB /IGNORE:4086 /OPT:REF /DEBUG /MACHINE:I386
Kernel32.lib MSVCRTD.lib vcruntimed.lib ucrtd.lib Gdi32.lib User32.lib
Winmm.lib Advapi32.lib /lldmap
/EXPORT:InitializeDriver=_ModuleEntryPoint
+ GCC:*_CLANG9_IA32_CC_FLAGS == -m32 -g -fshort-wchar
+ -fno-strict-aliasing -Wall -c -include AutoGen.h -D
+ _CRT_SECURE_NO_WARNINGS -Wnonportable-include-path -D UNICODE
-D
+ _CRT_SECURE_NO_DEPRECATE
--
2.13.0.windows.1