[cfe-dev] Troubles building libcxx from svn source

[Derrick Johnson via cfe-dev]

up vote0down votefavorite
<https://stackoverflow.com/questions/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_started.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_error(std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char> > const&)':
locale.cpp:(.text.unlikely._ZNSt3__112_GLOBAL__N_1L21__throw_runtime_errorERKNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE+0xf):
undefined reference to `__cxa_allocate_exception'
locale.cpp:(.text.unlikely._ZNSt3__112_GLOBAL__N_1L21__throw_runtime_errorERKNS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE+0x33):
undefined reference to `__cxa_throw'
locale.cpp:(.text.unlikely._ZNSt3__112_GLOBAL__N_1L21__throw_runtime_errorERKNS_12basic_stringIcNS_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__112ctype_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__112ctype_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' . . .

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).

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