On Tue, Mar 16, 2021 at 10:20 AM Flavio Castro Alves Filho < flavio.al...@gmail.com> wrote:
> Hello Xiang, > > Em ter., 16 de mar. de 2021 às 14:01, Xiang Xiao > <xiaoxiang781...@gmail.com> escreveu: > > > > On Tu > > > > > This project use the modern C++ feature, so you must enable llvm > > ibc++(CONFIG_LIBCXX=y) > > I tried a new build, executing: > > $ make distclean > $ ./tools/configure.sh -l stm32f4discovery:testlibcxx > $ make > > I can see the library being downloaded from git, but it is not compiling. > > In file included from > /home/ubuntu/nuttx_ws/nuttx/include/libcxx/random:1637, > from libcxx/src/random.cpp:16: > /home/ubuntu/nuttx_ws/nuttx/include/libcxx/cmath: At global scope: > /home/ubuntu/nuttx_ws/nuttx/include/libcxx/cmath:321:9: error: > '::signbit' has not been declared > 321 | using ::signbit; > | ^~~~~~~ > /home/ubuntu/nuttx_ws/nuttx/include/libcxx/cmath:322:9: error: > '::fpclassify' has not been declared > 322 | using ::fpclassify; > | ^~~~~~~~~~ > /home/ubuntu/nuttx_ws/nuttx/include/libcxx/cmath:326:9: error: > '::isnormal' has not been declared > 326 | using ::isnormal; > | ^~~~~~~~ > /home/ubuntu/nuttx_ws/nuttx/include/libcxx/cmath:327:9: error: > '::isgreater' has not been declared > 327 | using ::isgreater; > > How should I solve this issue? > CONFIG_LIBM has to be disabled, since NuttX match library implementation lacks many standard defined functions which is required by the new libc++ library. > > > > > > You need tell compiler stop to search the toolchain provided c++ library > > by -nostdinc++ > > > > I believe it will solve my cmake issue. > > Best regards, > > Flavio >
