Hi +int GLOBAL_USED _fltused = 1;
May I know what is the use of GLOBAL_USED? Only for compiler stub symbol? If so, why we add __GNUC__ here? Any other usage? +#if defined(__GNUC__) || defined(__clang__) + #define GLOBAL_USED __attribute__((used)) +#else + #define GLOBAL_USED +#endif > -----Original Message----- > From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Liming Gao > Sent: Friday, September 27, 2019 3:47 PM > To: devel@edk2.groups.io > Subject: [edk2-devel] [Patch 09/12] CryptoPkg IntrinsicLib: Make _fltused > always > be used > > With this change, global variable _fltused will not be removed by LTO > > Signed-off-by: Liming Gao <liming....@intel.com> > --- > CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > > diff --git a/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c > b/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c > index 6e4d4a68cc..94fe341bec 100644 > --- a/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c > +++ b/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c > @@ -2,7 +2,7 @@ > Intrinsic Memory Routines Wrapper Implementation for OpenSSL-based > Cryptographic Library. > > -Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR> > +Copyright (c) 2010 - 2019, Intel Corporation. All rights reserved.<BR> > SPDX-License-Identifier: BSD-2-Clause-Patent > > **/ > @@ -13,9 +13,15 @@ SPDX-License-Identifier: BSD-2-Clause-Patent > > typedef UINTN size_t; > > +#if defined(__GNUC__) || defined(__clang__) > + #define GLOBAL_USED __attribute__((used)) > +#else > + #define GLOBAL_USED > +#endif > + > /* OpenSSL will use floating point support, and C compiler produces the > _fltused > symbol by default. Simply define this symbol here to satisfy the linker. > */ > -int _fltused = 1; > +int GLOBAL_USED _fltused = 1; > > /* Sets buffers to a specified character */ > void * memset (void *dest, int ch, size_t count) > -- > 2.13.0.windows.1 > > > -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#48212): https://edk2.groups.io/g/devel/message/48212 Mute This Topic: https://groups.io/mt/34309062/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
