Hi Bob, This patch also breaks about half of the ARM/AARCH64 platforms in edk2-platforms. I agree it should go in at a later stage, but for now, can we please revert it?
Regards, Leif On Mon, Jul 20, 2020 at 04:10:27 +0000, Bob Feng wrote: > Reviewed-by: Bob Feng<bob.c.f...@intel.com> > > > -----Original Message----- > From: PierreGondois <pierre.gond...@arm.com> > Sent: Tuesday, July 7, 2020 4:35 PM > To: devel@edk2.groups.io > Cc: Pierre Gondois <pierre.gond...@arm.com>; Feng, Bob C > <bob.c.f...@intel.com>; Gao, Liming <liming....@intel.com>; > tomas.pi...@arm.com; n...@arm.com > Subject: [PATCH V2 1/2] BaseTools: Add gcc flag to warn on void* pointer > arithmetic > > From: Pierre Gondois <pierre.gond...@arm.com> > > By default, gcc allows void* pointer arithmetic. > This is a GCC extension. > However: > - the C reference manual states that void* > pointer "cannot be operands of addition > or subtraction operators". Cf s5.3.1 > "Generic Pointers"; > - Visual studio compiler treat such operation as > an error. > > To prevent such pointer arithmetic, the "-Wpointer-arith" > flag should be set for all GCC versions. > > The "-Wpointer-arith" allows to: > "Warn about anything that depends on the "size of" > a function type or of void. GNU C assigns these > types a size of 1, for convenience in calculations > with void * pointers and pointers to functions." > > This flag is available since GCC2.95.3 which came out in 2001. > > Signed-off-by: Pierre Gondois <pierre.gond...@arm.com> > --- > > The changes can be seen at: > https://github.com/PierreARM/edk2/commits/831_Add_gcc_flag_warning_v2 > > Notes: > v1: > - Add "-Wpointer-arith" gcc flag. [Pierre] > v2: > - Only add the flag for ARM and AARCH64. [Tomas] > > 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 > 8aeb8a2a6417e41c5660cda5066f52adc8cc3089..397b011ba38f97f81f314f8641ac8bb95d5a2197 > 100755 > --- a/BaseTools/Conf/tools_def.template > +++ b/BaseTools/Conf/tools_def.template > @@ -1,7 +1,7 @@ > # > # Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> # > Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> -# > Portions copyright (c) 2011 - 2019, ARM Ltd. All rights reserved.<BR> > +# Portions copyright (c) 2011 - 2020, ARM Ltd. All rights > +reserved.<BR> > # Copyright (c) 2015, Hewlett-Packard Development Company, L.P.<BR> # (C) > Copyright 2020, Hewlett Packard Enterprise Development LP<BR> # Copyright > (c) Microsoft Corporation > @@ -1921,9 +1921,9 @@ NOOPT_*_*_OBJCOPY_ADDDEBUGFLAG = > --add-gnu-debuglink=$(DEBUG_DIR)/$(MODULE_N > DEFINE GCC_ALL_CC_FLAGS = -g -Os -fshort-wchar -fno-builtin > -fno-strict-aliasing -Wall -Werror -Wno-array-bounds -include AutoGen.h > -fno-common > DEFINE GCC_IA32_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -m32 > -malign-double -freorder-blocks -freorder-blocks-and-partition -O2 > -mno-stack-arg-probe > DEFINE GCC_X64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mno-red-zone > -Wno-address -mno-stack-arg-probe > -DEFINE GCC_ARM_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mlittle-endian > -mabi=aapcs -fno-short-enums -funsigned-char -ffunction-sections > -fdata-sections -fomit-frame-pointer -Wno-address -mthumb -mfloat-abi=soft > -fno-pic -fno-pie > +DEFINE GCC_ARM_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -Wpointer-arith > -mlittle-endian -mabi=aapcs -fno-short-enums -funsigned-char > -ffunction-sections -fdata-sections -fomit-frame-pointer -Wno-address -mthumb > -mfloat-abi=soft -fno-pic -fno-pie > DEFINE GCC_ARM_CC_XIPFLAGS = -mno-unaligned-access > -DEFINE GCC_AARCH64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mlittle-endian > -fno-short-enums -fverbose-asm -funsigned-char -ffunction-sections > -fdata-sections -Wno-address -fno-asynchronous-unwind-tables > -fno-unwind-tables -fno-pic -fno-pie -ffixed-x18 > +DEFINE GCC_AARCH64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -Wpointer-arith > -mlittle-endian -fno-short-enums -fverbose-asm -funsigned-char > -ffunction-sections -fdata-sections -Wno-address > -fno-asynchronous-unwind-tables -fno-unwind-tables -fno-pic -fno-pie > -ffixed-x18 > DEFINE GCC_AARCH64_CC_XIPFLAGS = -mstrict-align -mgeneral-regs-only > DEFINE GCC_DLINK_FLAGS_COMMON = -nostdlib --pie > DEFINE GCC_DLINK2_FLAGS_COMMON = > -Wl,--script=$(EDK_TOOLS_PATH)/Scripts/GccBase.lds > -- > 'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)' > > > > -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#63133): https://edk2.groups.io/g/devel/message/63133 Mute This Topic: https://groups.io/mt/75351535/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
