xiaoxiang781216 commented on code in PR #8201: URL: https://github.com/apache/nuttx/pull/8201#discussion_r1084288842
########## libs/libxx/libcxx.defs: ########## @@ -71,6 +71,23 @@ libcxx/src/locale.cpp_CXXFLAGS += -Wno-shadow libcxx/src/filesystem/directory_iterator.cpp_CXXFLAGS += -Wno-shadow libcxx/src/filesystem/operations.cpp_CXXFLAGS += -Wno-shadow +# The following warning was observed with icicle:knsh config. +# Looking at the code in question, it seems harmless to ignore. +# +# Note: For some reasons, GCC -Wall enables a different set of warnings +# for C and C++. +# +# References: +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=10604 +# https://github.com/gcc-mirror/gcc/blob/e54375d85d4aa5889869c2672158083b2106b623/gcc/c-family/c.opt#L1285-L1287 +# +# CXX: libcxx/src/condition_variable.cpp +# libcxx/src/condition_variable.cpp: In member function 'void std::__1::condition_variable::__do_timed_wait(std::__1::unique_lock<std::__1::mutex>&, std::__1::chrono::time_point<std::__1::chrono::system_clock, std::__1::chrono::duration<long long int, std::__1::ratio<1, 1000000000> > >)': +# libcxx/src/condition_variable.cpp:64:19: error: comparison of integer expressions of different signedness: 'std::__1::chrono::duration<long long int>::rep' {aka 'long long int'} and 'std::__1::__libcpp_numeric_limits<long unsigned int, true>::type' {aka 'long unsigned int'} [-Werror=sign-compare] +# if (s.count() < ts_sec_max) +# ~~~~~~~~~~^~~~~~~~~~~~ +libcxx/src/condition_variable.cpp_CXXFLAGS += -Wno-sign-compare Review Comment: libcxx is just one place which generate this warning. Since all major OS typedef time_t to 64bit signed integer, more and more code will generate the same warning, do you want to fix all of them? BTW, it's very ugly to add -Wno-xxx in a common Make.defs(not all compiler support -Wno-sign-compare), so please modify the code to remove the warning and submit the change to libcxx community. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
