Tested x86_64-linux, built on avr and msp430-elf. This should be backported to the affected branches.
-- >8 -- This fixes a build failure that affects avr, but could affect other targets in theory. The _M_fini function should not try to use ::open or ::fopen if _GLIBCXX_USE_DEV_RANDOM is not defined, because no file can ever have been opened. libstdc++-v3/ChangeLog: * src/c++11/random.cc (random_device::_M_fini): Do not try to close the file handle if the target doesn't support the /dev/random and /dev/urandom files. --- libstdc++-v3/src/c++11/random.cc | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libstdc++-v3/src/c++11/random.cc b/libstdc++-v3/src/c++11/random.cc index 9872e28b29d..ed2db4aef57 100644 --- a/libstdc++-v3/src/c++11/random.cc +++ b/libstdc++-v3/src/c++11/random.cc @@ -548,6 +548,7 @@ namespace std _GLIBCXX_VISIBILITY(default) } #endif +#ifdef _GLIBCXX_USE_DEV_RANDOM #ifdef USE_POSIX_FILE_IO ::close(_M_fd); _M_fd = -1; @@ -555,6 +556,7 @@ namespace std _GLIBCXX_VISIBILITY(default) std::fclose(static_cast<FILE*>(_M_file)); #endif _M_file = nullptr; +#endif } random_device::result_type -- 2.39.1