Yes, I will post the patch to llvm libcxx email list.
> -----Original Message-----
> From: Alan Carvalho de Assis <acas...@gmail.com>
> Sent: Saturday, August 15, 2020 3:23 AM
> To: dev@nuttx.apache.org
> Subject: Re: cpp cxx help - No thread API
>
> Guys, I think we should move your bitbucket libcxx to github.com/nuttx to
> make it more official.
>
> What do you think? Other (better) option should including official support to
> NuttX on llvm libcxx.
>
> BR,
>
> Alan
>
> On 8/14/20, Xiang Xiao <xiaoxiang781...@gmail.com> wrote:
> > This is because Alan's porting isn't compatible with the NuttX's
> > latest master.
> > Please try this patch which integrate the latest libc++(11.0.0-rc1)
> > into
> > NuttX:
> > https://github.com/apache/incubator-nuttx/pull/1592
> > Note: you don't need git clone libc++ manually, Makefile will do this
> > automatically.
> >
> >> -----Original Message-----
> >> From: Matt DeWall <mdew...@gmail.com>
> >> Sent: Friday, August 14, 2020 9:23 AM
> >> To: dev@nuttx.apache.org
> >> Subject: Re: cpp cxx help - No thread API
> >>
> >> Thanks Xiang. We're definitely getting closer, I now hit some
> >> conflicting declarations within libcxx:
> >>
> >> IN: arch/arm/src/libarch.a -> staging/libarch.a
> >> make[1]: Entering directory '/nuttx/nuttx/libs/libxx'
> >> CXX: libxx_cxa_atexit.cxx
> >> CXX: libxx_eabi_atexit.cxx
> >> CXX: libcxx/algorithm.cxx
> >> In file included from /nuttx/nuttx/include/string.h:45,
> >> from /nuttx/nuttx/include/libcxx/string.h:61,
> >> from /nuttx/nuttx/include/libcxx/cstring:61,
> >> from /nuttx/nuttx/include/libcxx/algorithm:638,
> >> from libcxx/algorithm.cxx:10:
> >> /nuttx/nuttx/include/libcxx/stddef.h:57:21: error: conflicting
> >> declaration 'typedef long double max_align_t'
> >> 57 | typedef long double max_align_t;
> >> | ^~~~~~~~~~~
> >> In file included from /nuttx/nuttx/include/libcxx/cstddef:43,
> >> from /nuttx/nuttx/include/libcxx/initializer_list:47,
> >> from /nuttx/nuttx/include/libcxx/algorithm:636,
> >> from libcxx/algorithm.cxx:10:
> >> /nuttx/nuttx/include/stddef.h:120:3: note: previous declaration as
> >> 'typedef struct max_align_t max_align_t'
> >> 120 | } max_align_t;
> >> | ^~~~~~~~~~~
> >> In file included from /nuttx/nuttx/include/libcxx/__locale:40,
> >> from /nuttx/nuttx/include/libcxx/ios:216,
> >> from /nuttx/nuttx/include/libcxx/ostream:138,
> >> from /nuttx/nuttx/include/libcxx/istream:163,
> >> from /nuttx/nuttx/include/libcxx/random:1646,
> >> from libcxx/algorithm.cxx:11:
> >> /nuttx/nuttx/include/libcxx/support/xlocale/__nop_locale_mgmt.h:20:24:
> >> error: 'void* duplocale(locale_t)' was declared extern' and later
> >> 'static'
> >> [-fpermissive]
> >> 20 | static inline locale_t duplocale(locale_t) {
> >> | ^~~~~~~~~
> >> In file included from /nuttx/nuttx/include/libcxx/__locale:21,
> >> from /nuttx/nuttx/include/libcxx/ios:216,
> >> from /nuttx/nuttx/include/libcxx/ostream:138,
> >> from /nuttx/nuttx/include/libcxx/istream:163,
> >> from /nuttx/nuttx/include/libcxx/random:1646,
> >> from libcxx/algorithm.cxx:11:
> >> /nuttx/nuttx/include/locale.h:127:10: note: previous declaration of
> >> 'void* duplocale(locale_t)'
> >> 127 | locale_t duplocale(locale_t locobj);
> >> | ^~~~~~~~~
> >> In file included from /nuttx/nuttx/include/libcxx/__locale:40,
> >> from /nuttx/nuttx/include/libcxx/ios:216,
> >> from /nuttx/nuttx/include/libcxx/ostream:138,
> >> from /nuttx/nuttx/include/libcxx/istream:163,
> >> from /nuttx/nuttx/include/libcxx/random:1646,
> >> from libcxx/algorithm.cxx:11:
> >> /nuttx/nuttx/include/libcxx/support/xlocale/__nop_locale_mgmt.h:24:20:
> >> error: 'void freelocale(locale_t)' was declared extern' and later
> >> 'static'
> >> [-fpermissive]
> >> 24 | static inline void freelocale(locale_t) {
> >> | ^~~~~~~~~~
> >> In file included from /nuttx/nuttx/include/libcxx/__locale:21,
> >> from /nuttx/nuttx/include/libcxx/ios:216,
> >> from /nuttx/nuttx/include/libcxx/ostream:138,
> >> from /nuttx/nuttx/include/libcxx/istream:163,
> >> from /nuttx/nuttx/include/libcxx/random:1646,
> >> from libcxx/algorithm.cxx:11:
> >> /nuttx/nuttx/include/locale.h:128:6: note: previous declaration of
> >> 'void freelocale(locale_t)'
> >> 128 | void freelocale(locale_t locobj);
> >> | ^~~~~~~~~~
> >> In file included from /nuttx/nuttx/include/libcxx/__locale:40,
> >> from /nuttx/nuttx/include/libcxx/ios:216,
> >> from /nuttx/nuttx/include/libcxx/ostream:138,
> >> from /nuttx/nuttx/include/libcxx/istream:163,
> >> from /nuttx/nuttx/include/libcxx/random:1646,
> >> from libcxx/algorithm.cxx:11:
> >> /nuttx/nuttx/include/libcxx/support/xlocale/__nop_locale_mgmt.h:27:24:
> >> error: 'void* newlocale(int, const char*, locale_t)' was declared
> >> 'extern'
> >> and later 'static' [-fpermissive]
> >> 27 | static inline locale_t newlocale(int, const char *, locale_t) {
> >> | ^~~~~~~~~
> >> In file included from /nuttx/nuttx/include/libcxx/__locale:21,
> >> from /nuttx/nuttx/include/libcxx/ios:216,
> >> from /nuttx/nuttx/include/libcxx/ostream:138,
> >> from /nuttx/nuttx/include/libcxx/istream:163,
> >> from /nuttx/nuttx/include/libcxx/random:1646,
> >> from libcxx/algorithm.cxx:11:
> >> /nuttx/nuttx/include/locale.h:126:10: note: previous declaration of
> >> 'void* newlocale(int, const char*, locale_t)'
> >> 126 | locale_t newlocale(int category_mask, FAR const char *locale,
> >> locale_t base);
> >> | ^~~~~~~~~
> >> In file included from /nuttx/nuttx/include/libcxx/__locale:40,
> >> from /nuttx/nuttx/include/libcxx/ios:216,
> >> from /nuttx/nuttx/include/libcxx/ostream:138,
> >> from /nuttx/nuttx/include/libcxx/istream:163,
> >> from /nuttx/nuttx/include/libcxx/random:1646,
> >> from libcxx/algorithm.cxx:11:
> >> /nuttx/nuttx/include/libcxx/support/xlocale/__nop_locale_mgmt.h:31:24:
> >> error: 'void* uselocale(locale_t)' was declared extern' and later
> >> 'static'
> >> [-fpermissive]
> >> 31 | static inline locale_t uselocale(locale_t) {
> >> | ^~~~~~~~~
> >> In file included from /nuttx/nuttx/include/libcxx/__locale:21,
> >> from /nuttx/nuttx/include/libcxx/ios:216,
> >> from /nuttx/nuttx/include/libcxx/ostream:138,
> >> from /nuttx/nuttx/include/libcxx/istream:163,
> >> from /nuttx/nuttx/include/libcxx/random:1646,
> >> from libcxx/algorithm.cxx:11:
> >> /nuttx/nuttx/include/locale.h:130:10: note: previous declaration of
> >> 'void* uselocale(locale_t)'
> >> 130 | locale_t uselocale(locale_t newloc);
> >> | ^~~~~~~~~
> >> make[1]: *** [Makefile:80: algorithm.o] Error 1
> >> make[1]: Leaving directory '/nuttx/nuttx/libs/libxx'
> >> make: *** [tools/LibTargets.mk:203: libs/libxx/libxx.a] Error 2
> >>
> >> On Wed, Aug 12, 2020 at 8:55 PM Xiang Xiao
> >> <xiaoxiang781...@gmail.com>
> >> wrote:
> >>
> >> > Matt, please try the attached workaround. I will provide the real
> >> > implementation later.
> >> >
> >> > > -----Original Message-----
> >> > > From: Matt DeWall <mdew...@gmail.com>
> >> > > Sent: Thursday, August 13, 2020 9:48 AM
> >> > > To: dev@nuttx.apache.org
> >> > > Subject: Re: cpp cxx help - No thread API
> >> > >
> >> > > I should add that I also tried Marc's original answer (multiple
> >> > > lines to
> >> > > Make.defs) with the same result.
> >> > >
> >> > > On Wed, Aug 12, 2020 at 6:38 PM Matt DeWall <mdew...@gmail.com>
> >> > > wrote:
> >> > >
> >> > > > Xiang and Marc, thank you very much for your quick responses.
> >> > > >
> >> > > > That did get me further, I'm getting an error around
> >> > > > "at_quick_exit"
> >> > now.
> >> > > > Based on my googles it's regarding std11 or std17 options not
> >> > > > being defined.
> >> > > >
> >> > > > I did try adding -std=c++11 to the Make.defs but it didn't have
> >> > > > any effect. I'm using the libcxx I cloned from
> >> > > > https://bitbucket.org/acassis/libcxx (per the docs) if that
> >> > > > makes any difference.
> >> > > >
> >> > > > Error:
> >> > > > make[1]: Entering directory '/nuttx/nuttx/libs/libxx'
> >> > > > CXX: libxx_cxa_atexit.cxx
> >> > > > In file included from libxx.hxx:62,
> >> > > > from libxx_cxa_atexit.cxx:44:
> >> > > > /nuttx/nuttx/include/libcxx/cstdlib:155:9: error: '::at_quick_exit'
> >> > > > has not been declared
> >> > > > 155 | using ::at_quick_exit;
> >> > > > | ^~~~~~~~~~~~~
> >> > > > /nuttx/nuttx/include/libcxx/cstdlib:156:9: error: '::quick_exit'
> >> > > > has not been declared
> >> > > > 156 | using ::quick_exit;
> >> > > > | ^~~~~~~~~~
> >> > > > make[1]: *** [Makefile:80: libxx_cxa_atexit.o] Error 1
> >> > > > make[1]: Leaving directory '/nuttx/nuttx/libs/libxx'
> >> > > > make: *** [tools/LibTargets.mk:203: libs/libxx/libxx.a] Error 2
> >> > > >
> >> > > > Thanks!
> >> > > >
> >> > > > Matt
> >> > > >
> >> > > >
> >> > > > On Wed, Aug 12, 2020 at 12:22 AM Xiang Xiao
> >> > > > <xiaoxiang781...@gmail.com>
> >> > > > wrote:
> >> > > >
> >> > > >> Yes, include setting is done in the recently:
> >> > > >> commit d32e9c38dfb0659a7f3c0cf586ba1584cd7eb3d6
> >> > > >> Author: Xiang Xiao <xiaoxi...@xiaomi.com>
> >> > > >> Date: Sat Jul 11 18:37:40 2020 +0800
> >> > > >>
> >> > > >> boards: Move the C/C++ search path to the common place
> >> > > >>
> >> > > >> so all boards support uClibc++/libc++ automatically
> >> > > >>
> >> > > >> Signed-off-by: Xiang Xiao <xiaoxi...@xiaomi.com>
> >> > > >> Change-Id: Ibe6fafbec57f7acb26ea6188a3e9923ea82295c5
> >> > > >> which is part of the work to make libc++/uCLibc++ available to
> >> > > >> all
> >> > boards.
> >> > > >>
> >> > > >> > -----Original Message-----
> >> > > >> > From: Marc Rosen <ma...@zeitcontrol.de>
> >> > > >> > Sent: Wednesday, August 12, 2020 2:46 PM
> >> > > >> > To: dev@nuttx.apache.org
> >> > > >> > Subject: Re: cpp cxx help - No thread API
> >> > > >> >
> >> > > >> > I should look more through before starting to say stuff.
> >> > > >> >
> >> > > >> > So most of the stuff I mentioned is moot because it was
> >> > > >> > moved to a
> >> > > >> different place that I was not aware of.
> >> > > >> >
> >> > > >> > So Matt as Xiang mentioned the ARCHCXXFLAGS line should be
> >> > > >> > enough.
> >> > > >> Importend is the define of __NuttX__ because it enables the
> >> > > >> > necessary options for libcpp to compile.
> >> > > >> >
> >> > > >> > regards
> >> > > >> >
> >> > > >> > Marc Rosen
> >> > > >> >
> >> > > >> > ZeitControl Cardsystems GmbH Siedlerweg 39
> >> > > >> > D-32429 Minden
> >> > > >> > Tel. ++49 (0)571 50 52 222
> >> > > >> > Fax. ++49 (0)571 50 52 299
> >> > > >> > E-Mail ma...@zeitcontrol.de
> >> > > >> >
> >> > > >> > Am 12.08.2020 um 08:32 schrieb Marc Rosen:
> >> > > >> > > Hi,
> >> > > >> > >
> >> > > >> > > i did a curiosity check on this.
> >> > > >> > > No Make.defs for STM32 boards on master from some what
> >> > > >> > > yesterday evening (my localtime) has any include
> >> > > >> > > definitions for c++.
> >> > > >> > >
> >> > > >> > > So to help Matt. the following is from my current config
> >> > > >> > > add this to your Make.defs in your /nuttx/nuttx folder:
> >> > > >> > >
> >> > > >> > > ARCHINCLUDESXX += ${shell $(INCDIR) -s "$(CC)"
> >> > > >> > > $(TOPDIR)$(DELIM)include} ARCHINCLUDESXX += ${shell
> >> > > >> > > $(INCDIR) -s
> >> > > >> "$(CC)"
> >> > > >> > > $(TOPDIR)$(DELIM)include$(DELIM)cxx}
> >> > > >> > > ARCHINCLUDESXX += ${shell $(INCDIR) -s "$(CC)"
> >> > > >> > > $(TOPDIR)$(DELIM)include$(DELIM)libcxx}
> >> > > >> > >
> >> > > >> > > ifeq ($(CONFIG_LIBCXX),y)
> >> > > >> > > ARCHCXXFLAGS += -std=c++17 -D__NuttX__
> >> > > >> > > -D_LIBCPP_BUILD_STATIC
> >> > > >> > >
> >> > > >> > > ifneq ($(CONFIG_CXX_EXCEPTION),y)
> >> > > >> > > ARCHCXXFLAGS += -D_LIBCPP_NO_EXCEPTIONS
> >> > > >> > > endif
> >> > > >> > >
> >> > > >> > > ifeq ($(CONFIG_LIBCXX_BUILD_LIBRARY),y)
> >> > > >> > > ARCHCXXFLAGS += -D_LIBCPP_BUILDING_LIBARAY
> >> > > >> > > endif
> >> > > >> > >
> >> > > >> > > endif
> >> > > >> > >
> >> > > >> > > regards
> >> > > >> > >
> >> > > >> > > Marc Rosen
> >> > > >> > >
> >> > > >> > > ZeitControl Cardsystems GmbH Siedlerweg 39
> >> > > >> > > D-32429 Minden
> >> > > >> > > Tel. ++49 (0)571 50 52 222
> >> > > >> > > Fax. ++49 (0)571 50 52 299
> >> > > >> > > E-Mail ma...@zeitcontrol.de
> >> > > >> > >
> >> > > >> > > Am 12.08.2020 um 08:07 schrieb Xiang Xiao:
> >> > > >> > >> Do you have this in your boards/Make.defs:
> >> > > >> > >> ARCHCXXFLAGS += -D__NuttX__ -nostdinc++ Since there are
> >> > > >> > >> many complex setting to make C++ library work on NuttX,
> >> > > >> > >> but this setting spread
> >> > > >> in different Make.defs, I plan to enhance the experience in
> >> > > >> the
> >> > > >> > next couple weeks(actually, all is done in our internal
> >> > > >> > development
> >> > > >> branch):
> >> > > >> > >> 1.Centralize the setting to arch/Toolchain.defs, so all
> >> > > >> > >> boards will
> >> > > >> support libc++/uClibc++ automatically.
> >> > > >> > >> 2.Upgrade to the latest uClibc++(already upstream) and
> >> > > >> > >> libc++ without the special NuttX hack 3.Modify Makefile
> >> > > >> > >> libc++ to
> >> > > >> > >> automatically download the package from the official
> >> > > >> > >> release(uClibc++ already upstream) 4.Enable all deconfig
> >> > > >> > >> related to uClibc++/libc++ in the daily build system
> >> > > >> > >>
> >> > > >> > >>> -----Original Message-----
> >> > > >> > >>> From: Matt DeWall <mdew...@gmail.com>
> >> > > >> > >>> Sent: Wednesday, August 12, 2020 10:53 AM
> >> > > >> > >>> To: dev@nuttx.apache.org
> >> > > >> > >>> Subject: cpp cxx help - No thread API
> >> > > >> > >>>
> >> > > >> > >>> Hi devs! I'm getting started on NuttX and love the project.
> >> > > >> Looking to port my cpp project to NuttX.
> >> > > >> > >>>
> >> > > >> > >>> I'm having trouble compiling the CPP version of the
> >> > > >> > >>> hello world using the existing documentation. I'm able
> >> > > >> > >>> to build nuttx just
> >> > > >> fine and flash my device using the C version of Hello World.
> >> > > >> > >>>
> >> > > >> > >>> The error during CXX building is "No thread API"
> >> > > >> > >>>
> >> > > >> > >>>
> >> > > >> > >>> *Background:*
> >> > > >> > >>>
> >> > > >> > >>> I'm following the (latest?) directions here:
> >> > > >> > >>>
> >> > > >> > >>> https://github.com/apache/incubator-nuttx/
> >> > > >> > >>>
> >> > > >> > >>> I made my own docker image based on this Dockerfile
> >> > > >> > >>> which I
> >> > > >> understand nuttx is using for some part of ci/cid/testing:
> >> > > >> > >>>
> >> > > >> > >>>
> >> > > >> https://github.com/apache/incubator-nuttx-testing/blob/master/
> >> > > >> doc
> >> > > >> ker
> >> > > >> > >>> /linux/Dockerfile
> >> > > >> > >>>
> >> > > >> > >>> Running the following commands:
> >> > > >> > >>>
> >> > > >> > >>> git clone https://github.com/apache/incubator-nuttx.git
> >> > > >> > >>> nuttx git clone
> >> > > >> > >>> https://github.com/apache/incubator-nuttx-apps.git
> >> > > >> > >>> apps
> >> > > >> > >>>
> >> > > >> > >>> Then I configure for my own board (stm32f103rbt6)
> >> > > >> > >>> ./configure.sh nucleo-f103rb/nsh
> >> > > >> > >>>
> >> > > >> > >>> After "make menuconfig" and configuring the C hello
> >> > > >> > >>> world app, I'm
> >> > > >> able to build and flash my board and run "hello" just fine.
> >> > > >> > >>>
> >> > > >> > >>> This leads me to believe my toolchain is good to go.
> >> > > >> > >>>
> >> > > >> > >>>
> >> > > >> > >>> *Installing libcxx:*
> >> > > >> > >>>
> >> > > >> > >>> So moving on the c++ docs found here:
> >> > > >> > >>>
> >> > > >> https://cwiki.apache.org/confluence/pages/viewpage.action?page
> >> > > >> Id=
> >> > > >> 139
> >> > > >> > >>> 629545
> >> > > >> > >>> but they may be outdated?
> >> > > >> > >>>
> >> > > >> > >>> Running:
> >> > > >> > >>>
> >> > > >> > >>> git clone https://bitbucket.org/acassis/libcxx
> >> > > >> > >>> cd libcxx
> >> > > >> > >>> ./install /nuttx/nuttx
> >> > > >> > >>>
> >> > > >> > >>> "Installing LLVM/libcxx in the NuttX source
> >> > > >> > >>> treeInstallation
> >> > > >> succeeded"
> >> > > >> > >>>
> >> > > >> > >>> I skipped the other two lines in that guide because they
> >> > > >> > >>> seem to
> >> > > >> clone a different and older nuttx clone from Alan's repo.
> >> > > >> > >>>
> >> > > >> > >>>
> >> > > >> > >>> *Trying to implement c++:*
> >> > > >> > >>>
> >> > > >> > >>> Going over to make menuconfig and enabling the following
> >> > > >> > >>> options (and whatever comes with them)
> >> > > >> > >>>
> >> > > >> > >>> Libary Routines->Have C++ Compiler
> >> > > >> > >>>
> >> > > >> > >>> Libary Routines->Build LLVM libc++
> >> > > >> > >>>
> >> > > >> > >>> Applications->Hello World C++ example
> >> > > >> > >>>
> >> > > >> > >>> When I go to build I get a "No thread API"...
> >> > > >> > >>>
> >> > > >> > >>> make[2]: Entering directory
> >> > > >> > >>> '/nuttx/apps/examples/helloxx'In file included from
> >> > > >> > >>> /nuttx/nuttx/include/libcxx/cstdio:99,from
> >> > > >> > >>>
> >> > ./helloxx_main.cxx:42:/nuttx/nuttx/include/libcxx/__config:845:4:
> >> > > >> error:
> >> > > >> > >>> #error "No thread API"845 | # error "No thread API"
> >> > > >> > >>>
> >> > > >> > >>> I've only seen a 3 year old post where some person was
> >> > > >> > >>> using their
> >> > > >> own toolchain, so I'm not clear on how to proceed.
> >> > > >> > >>>
> >> > > >> > >>> I think I need to include some extra things in my
> >> > > >> > >>> Make.defs but I'm usually working at a higher layer, I'm
> >> > > >> > >>> a medium-level linux person
> >> > > >> and have next to zero experience developing c/c++ apps on
> >> > > >> > linux, but I"ve written plenty of apps on Windows.
> >> > > >> > >>>
> >> > > >> > >>> Really appreciate any help or insight you can provide,
> >> > > >> > >>> thanks!
> >> > > >> > >>>
> >> > > >> > >>> Matt
> >> > > >> > >
> >> > > >> >
> >> > > >>
> >> > > >>
> >> > > >>
> >> >
> >
> >
