Package: g++ Version: 4:5.2.1-4 Severity: normal Control: tags jessie sid Tags: jessie sid
********** Another Debian specific bug... GCC can't compile a program using RDSEED intrinsics. It results in an error "error: ‘_rdseed64_step’ was not declared in this scope". According the Intel (which the GCC told me to follow), RDSEED intrinsics are available in <immintrin.h>. Confer, http://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=rdseed. The same program, using RDRAND, compiles fine. ********** $ cat rdseed.cxx #include <iostream> #include <immintrin.h> int main() { unsigned long long val = 0; _rdseed64_step(&val); _rdseed32_step(&val); _rdseed16_step(&val); std::cout << val << std::endl; return !val; } $ g++ -mrdseed rdseed.cxx -o rdseed.exe rdseed.cxx: In function ‘int main()’: rdseed.cxx:7:22: error: ‘_rdseed64_step’ was not declared in this scope _rdseed64_step(&val); ^ rdseed.cxx:8:22: error: ‘_rdseed32_step’ was not declared in this scope _rdseed32_step(&val); ^ rdseed.cxx:9:22: error: ‘_rdseed16_step’ was not declared in this scope _rdseed16_step(&val); ^ ********** $ g++ --version g++ (Debian 5.2.1-20) 5.2.1 20151002 $ uname -a Linux debian-8-x64 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u5 (2015-10-09) x86_64 GNU/Linux ********** $ apt-cache show g++ Package: g++ Status: install ok installed Priority: optional Section: devel Installed-Size: 17 Maintainer: Debian GCC Maintainers <debian-gcc@lists.debian.org> Architecture: amd64 Source: gcc-defaults (1.145) Version: 4:5.2.1-4 Provides: c++-compiler Depends: cpp (>= 4:5.2.1-4), gcc (>= 4:5.2.1-4), g++-5 (>= 5.2.1-13~), gcc-5 (>= 5.2.1-13~) Suggests: g++-multilib Description-en: GNU C++ compiler This is the GNU C++ compiler, a fairly portable optimizing compiler for C++. . This is a dependency package providing the default GNU C++ compiler. Description-md5: 4d44b18774ae5123b7c3f70d940cf655 Package: g++ Source: gcc-defaults (1.136) Version: 4:4.9.2-2 Installed-Size: 34 Maintainer: Debian GCC Maintainers <debian-gcc@lists.debian.org> Architecture: amd64 Provides: c++-compiler Depends: cpp (>= 4:4.9.2-2), gcc (>= 4:4.9.2-2), g++-4.9 (>= 4.6.4-1~), gcc-4.9 (>= 4.6.4-1~) Suggests: g++-multilib Description-en: GNU C++ compiler This is the GNU C++ compiler, a fairly portable optimizing compiler for C++. . This is a dependency package providing the default GNU C++ compiler. Description-md5: 4d44b18774ae5123b7c3f70d940cf655 Build-Essential: yes Tag: devel::compiler, devel::lang:c++, implemented-in::c, interface::commandline, role::dummy, role::metapackage, suite::gnu, works-with::software:source Section: devel Priority: optional Filename: pool/main/g/gcc-defaults/g++_4.9.2-2_amd64.deb Size: 1530 MD5sum: cd4aa68ba8cf582df806c324988e6a00 SHA1: 82a50c84e1105e1f0c767da82c09f2398ac2d4b2 SHA256: 6fb9842c6a0ad0cd5445b9f2f2cb3f738abcc83a6b8e0900aad441574f5cecee
