Vitaly:
With this change, X64 GCC and CLANG tool chain will use below VA_START definition.
#define VA_START(Marker, Parameter) __builtin_ms_va_start (Marker, Parameter)
Thanks
Liming
From: devel@edk2.groups.io <devel@edk2.groups.io>
On Behalf Of Vitaly Cheptsov via Groups.Io
Sent: Wednesday, February 12, 2020 4:08 PM
To: Liu, Zhiguang <zhiguang.liu@intel.com>
Cc: devel@edk2.groups.io; Gao, Liming <liming.gao@intel.com>; Shi, Steven <steven.shi@intel.com>
Subject: Re: [edk2-devel] [PATCH 1/1] BaseTools: Switch to GNU mode for CLANGPDB
Liu,
Thanks for explanation, it does make sense now. As for no need to -DNO_MSABI_VA_FUNCS I agree, but it will not make much difference, because from what I understand the VA_ARG implementation is chosen based on EFIAPI presence when generic
__builtin’s are used.
Vitaly
After your patch to Switch to GNU mode for CLANGPDB, the build option -DNO_MSABI_VA_FUNCS is not required. I will send another patch to remove it.
And for you question, this is a patch set that resolves BZ 2415, and the second patch 21821933aea284cd3dfea6994bd4b83bd9739fc9 has
direct influence to CLANG38.
Done. As a side note, I am not positive how can 7990438f1437f47990a8890dee51978cb8dbc25c[1] resolve BZ 2415[2]. The bug was about CLANG38, and the toolchain updated was CLANGPDB. While it makes sense to update CLANGPDB with this flag to
stay clean (it will not make a difference for clang in GNU mode), CLANGPDB has nothing to do to CLANG38.
Can you update this patch based on the latest edk2 trunk? I will catch it for edk2 Q1 stable tag.
We did run several of our projects based on EDK II in X64 mode, DEBUG, RELEASE, NOOPT. Noticed no change from XCODE5.
We also tried building several EDK builtin packages like CryptoPkg, MdePkg, MdeModulePkg.
Vitaly:
This change is good. Can you your test for it? I verify this patch for Ovmf platform on Windows. It can make ovmf pass build with CLANGPDB.
Thanks
Liming
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io>
On Behalf Of Vitaly Cheptsov via Groups.Io
> Sent: Monday, February 10, 2020 6:59 PM
> To: devel@edk2.groups.io
> Subject: [edk2-devel] [PATCH 1/1] BaseTools: Switch to GNU mode for CLANGPDB
>
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2397
>
> Signed-off-by: Vitaly Cheptsov <vit9696@protonmail.com>
> ---
> BaseTools/Conf/tools_def.template | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
> index feee2bbf16..6bf6c5768e 100755
> --- a/BaseTools/Conf/tools_def.template
> +++ b/BaseTools/Conf/tools_def.template
> @@ -2755,11 +2755,11 @@ RELEASE_CLANG38_AARCH64_DLINK_FLAGS = DEF(CLANG38_AARCH64_DLINK_FLAGS) -flto -Wl
> DEFINE CLANGPDB_IA32_PREFIX = ENV(CLANG_BIN)
> DEFINE CLANGPDB_X64_PREFIX = ENV(CLANG_BIN)
>
> -DEFINE CLANGPDB_IA32_TARGET = -target i686-unknown-windows
> -DEFINE CLANGPDB_X64_TARGET = -target x86_64-unknown-windows
> +DEFINE CLANGPDB_IA32_TARGET = -target i686-unknown-windows-gnu
> +DEFINE CLANGPDB_X64_TARGET = -target x86_64-unknown-windows-gnu
>
> DEFINE CLANGPDB_WARNING_OVERRIDES = -Wno-parentheses-equality -Wno-tautological-compare -Wno-tautological-constant-out-
> of-range-compare -Wno-empty-body -Wno-unused-const-variable -Wno-varargs -Wno-unknown-warning-option -Wno-microsoft-enum-
> forward-reference
> -DEFINE CLANGPDB_ALL_CC_FLAGS = DEF(GCC48_ALL_CC_FLAGS) DEF(CLANGPDB_WARNING_OVERRIDES) -fno-stack-protector -
> mms-bitfields -Wno-address -Wno-shift-negative-value -Wno-unknown-pragmas -Wno-incompatible-library-redeclaration -fno-
> asynchronous-unwind-tables -mno-implicit-float -ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -
> funsigned-char -fno-ms-extensions -Wno-null-dereference -fms-compatibility -mno-stack-arg-probe
> +DEFINE CLANGPDB_ALL_CC_FLAGS = DEF(GCC48_ALL_CC_FLAGS) DEF(CLANGPDB_WARNING_OVERRIDES) -fno-stack-protector -
> fno-asynchronous-unwind-tables -funsigned-char -ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -Wno-
> address -Wno-shift-negative-value -Wno-unknown-pragmas -Wno-incompatible-library-redeclaration -Wno-null-dereference -mno-
> implicit-float -mms-bitfields -mno-stack-arg-probe -nostdlib -nostdlibinc
>
> ###########################
> # CLANGPDB IA32 definitions
> --
> 2.21.1 (Apple Git-122.3)
>
>
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