From 780137d585344bf9de906a285a50498104c0c66e Mon Sep 17 00:00:00 2001 From: Thiago Macieira Date: Tue, 13 Aug 2019 21:59:26 -0700 Subject: QRandom: add support for RDSEED The Intel whitepaer[1] recommends using the RDSEED over RDRAND whenever present. libstdc++ from GCC 10 will also use it in std::random_device. [ChangeLog][QtCore][QRandomGenerator] The system() random generator will now use the RDSEED instruction on x86 processors whenever available as the first source of random data. It will fall back to RDRAND and then to the system functions, in that order. [1] https://software.intel.com/en-us/articles/intel-digital-random-number-generator-drng-software-implementation-guide Change-Id: I907a43cd9a714da288a2fffd15bab176e54e1975 Reviewed-by: Edward Welbourne --- mkspecs/common/gcc-base.conf | 1 + 1 file changed, 1 insertion(+) (limited to 'mkspecs/common/gcc-base.conf') diff --git a/mkspecs/common/gcc-base.conf b/mkspecs/common/gcc-base.conf index 4d82321cba..472333d2ea 100644 --- a/mkspecs/common/gcc-base.conf +++ b/mkspecs/common/gcc-base.conf @@ -93,6 +93,7 @@ QMAKE_CFLAGS_SSE4_1 += -msse4.1 QMAKE_CFLAGS_SSE4_2 += -msse4.2 QMAKE_CFLAGS_F16C += -mf16c QMAKE_CFLAGS_RDRND += -mrdrnd +QMAKE_CFLAGS_RDSEED += -mrdseed QMAKE_CFLAGS_AVX += -mavx QMAKE_CFLAGS_AVX2 += -mavx2 QMAKE_CFLAGS_AVX512F += -mavx512f -- cgit v1.2.3