[cfe-dev] Troubles building libcxx from svn source

Wed Oct 11 17:25:59 PDT 2017

The Clang documentation is a bit out-of-date, and should probably include
libc++abi by default as well. That way the build just works.

On Wed, Oct 11, 2017 at 11:07 AM, Derrick Johnson via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> After digging through makefiles, the issue is that on a new Linux install
> there is only libstdc++, and the CMakeLists file was sticking
> -nodefaultlibs in the link instructions.
>
> So no c++ abi was present as you pointed out Jon (and that you for taking
> the time to respond, I appreciate it!)
>
> Adding -DLIBCXX_CXX_ABI=libstdc++ to the top-level cmake invocation seems
> to have fixed the problem; I'm building now so we'll see.
>
> On Wed, Oct 11, 2017 at 12:53 PM, Jonathan Roelofs <
> jonathan at codesourcery.com> wrote:
>
>>
>>
>> On 10/11/17 7:36 AM, Derrick Johnson via cfe-dev wrote:
>>
>>> up vote0down votefavorite <https://stackoverflow.com/que
>>> stions/46687323/linker-errors-building-libcxx-on-fresh-ubuntu-install#>
>>> <https://stackoverflow.com/questions/46687323/linker-errors-
>>> building-libcxx-on-fresh-ubuntu-install#>
>>>
>>>
>>> The directions I followed are here: https://clang.llvm.org/get_sta
>>> rted.html (steps 1-7, including the optional ones).
>>>
>>> I was very careful to type everything EXACTLY as specified (so all
>>> projects are in the correct directories).
>>>
>>> After I ran 'cmake', everything looked fine, no error messages.
>>>
>>> But when I try to build with 'make', when it gets to libcxx it has
>>> linker errors:
>>>
>>> |. . . [100%] Built target cxx_objects [100%] Linking CXX shared library
>>> ../../../lib/libc++.so CMakeFiles/cxx_objects.dir/__/src/locale.cpp.o:
>>> In function `std::__1::(anonymous namespace)::__throw_runtime_er
>>> ror(std::__1::basic_string<char, std::__1::char_traits<char>,
>>> std::__1::allocator<char> > const&)': locale.cpp:(.text.unlikely._ZN
>>> St3__112_GLOBAL__N_1L21__throw_runtime_errorERKNS_12basic_st
>>> ringIcNS_11char_traitsIcEENS_9allocatorIcEEEE+0xf): undefined reference
>>> to `__cxa_allocate_exception' locale.cpp:(.text.unlikely._ZN
>>> St3__112_GLOBAL__N_1L21__throw_runtime_errorERKNS_12basic_st
>>> ringIcNS_11char_traitsIcEENS_9allocatorIcEEEE+0x33): undefined
>>> reference to `__cxa_throw' locale.cpp:(.text.unlikely._ZN
>>> St3__112_GLOBAL__N_1L21__throw_runtime_errorERKNS_12basic_st
>>> ringIcNS_11char_traitsIcEENS_9allocatorIcEEEE+0x3e): undefined
>>> reference to `__cxa_free_exception' CMakeFiles/cxx_objects.dir/__/src/locale.cpp.o:
>>> In function `std::__1::ctype_byname<wchar_t>::do_widen(char) const':
>>> locale.cpp:(.text._ZNKSt3__112ctype_bynameIwE8do_widenEc+0x43):
>>> undefined reference to `__cxa_call_unexpected'
>>> CMakeFiles/cxx_objects.dir/__/src/locale.cpp.o: In function
>>> `std::__1::ctype_byname<wchar_t>::do_widen(char const*, char const*,
>>> wchar_t*) const': locale.cpp:(.text._ZNKSt3__112
>>> ctype_bynameIwE8do_widenEPKcS3_Pw+0x7a): undefined reference to
>>> `__cxa_call_unexpected' CMakeFiles/cxx_objects.dir/__/src/locale.cpp.o:
>>> In function `std::__1::ctype_byname<wchar_t>::do_narrow(wchar_t, char)
>>> const': locale.cpp:(.text._ZNKSt3__112ctype_bynameIwE9do_narrowEwc+0x46):
>>> undefined reference to `__cxa_call_unexpected'
>>> CMakeFiles/cxx_objects.dir/__/src/locale.cpp.o: In function
>>> `std::__1::ctype_byname<wchar_t>::do_narrow(wchar_t const*, wchar_t
>>> const*, char, char*) const': locale.cpp:(.text._ZNKSt3__112
>>> ctype_bynameIwE9do_narrowEPKwS3_cPc+0x8d): undefined reference to
>>> `__cxa_call_unexpected' CMakeFiles/cxx_objects.dir/__/src/locale.cpp.o:
>>> In function `std::__1::locale::__imp::use_facet(long) const [clone
>>> .part.18]': locale.cpp:(.text.unlikely._ZNKSt3__16locale5__imp9use_facetEl.part.18+0x7):
>>> undefined reference to `__cxa_allocate_exception'
>>> locale.cpp:(.text.unlikely._ZNKSt3__16locale5__imp9use_facetEl.part.18+0x28):
>>> undefined reference to `__cxa_throw' CMakeFiles/cxx_objects.dir/__/src/locale.cpp.o:
>>> In function `std::__1::__time_get_c_storage<char>::__weeks() const':
>>> locale.cpp:(.text._ZNKSt3__120__time_get_c_storageIcE7__weeksEv+0x21):
>>> undefined reference to `__cxa_guard_acquire' locale.cpp:(.text._ZNKSt3__120
>>> __time_get_c_storageIcE7__weeksEv+0x167): undefined reference to
>>> `__cxa_guard_release' locale.cpp:(.text._ZNKSt3__120
>>> __time_get_c_storageIcE7__weeksEv+0x178): undefined reference to
>>> `__cxa_guard_acquire' locale.cpp:(.text._ZNKSt3__120
>>> __time_get_c_storageIcE7__weeksEv+0x35a): undefined reference to
>>> `__cxa_guard_release' locale.cpp:(.text._ZNKSt3__120
>>> __time_get_c_storageIcE7__weeksEv+0x383): undefined reference to
>>> `__cxa_guard_abort' . . . |'
>>>
>>
>> These missing symbols are things from the c++ abi library, i.e. either
>> libcxxabi, libcxxrt, or libsupc++, depending on your platform.
>>
>>
>> Jon
>>
>>
>>> Fresh Ubuntu 17.04 install (X86) with the preinstalled gcc being used to
>>> build.
>>>
>>> (neither clang nor libc++ are present in the default 17.04 release).
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
>>> This message is intended only for the use of the individual or entity to
>>> which it is addressed, and may contain private and confidential
>>> information. If you are not the intended recipient of this message you are
>>> hereby notified that any review, dissemination, distribution or copying of
>>> this message is strictly prohibited. If you have received this e-mail in
>>> error, please immediately notify the sender by replying to this e-mail and
>>> delete the message and any attachment(s) from your system. This
>>> communication is for information purposes only and should not be regarded
>>> as an offer to sell or as a solicitation of an offer to buy any financial
>>> product, an official confirmation of any transaction, or as an official
>>> statement of Trexquant Investment LP. All information is subject to change
>>> without notice.
>>>
>>>
>>> _______________________________________________
>>> cfe-dev mailing list
>>> cfe-dev at lists.llvm.org
>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
>>>
>>>
>> --
>> Jon Roelofs
>> jonathan at codesourcery.com
>> CodeSourcery / Mentor Embedded / Siemens
>>
>
>
> ------------------------------
>
> This message is intended only for the use of the individual or entity to
> which it is addressed, and may contain private and confidential
> information. If you are not the intended recipient of this message you are
> hereby notified that any review, dissemination, distribution or copying of
> this message is strictly prohibited. If you have received this e-mail in
> error, please immediately notify the sender by replying to this e-mail and
> delete the message and any attachment(s) from your system. This
> communication is for information purposes only and should not be regarded
> as an offer to sell or as a solicitation of an offer to buy any financial
> product, an official confirmation of any transaction, or as an official
> statement of Trexquant Investment LP. All information is subject to change
> without notice.
>
> _______________________________________________
> cfe-dev mailing list
> cfe-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/cfe-dev/attachments/20171011/0a543f3e/attachment.html>