Public bug reported:
Hi,
I try to build GHDL with LLVM 3.5 backend on Ubuntu 14.04.2 LTS.
I have interesting linker errors like:
/usr/lib/llvm-3.5/lib/libLLVMSupport.a(Errno.o): In function
`llvm::sys::StrError(int)':
(.text._ZN4llvm3sys8StrErrorEi+0x59): undefined reference to
`std::string::assign(char const*, unsigned long)'
Seems like the LLVM lib cannot link the Standard C++ lib.
The missed symbol even doesn't exist in libc++, although there is a similar one:
$ objdump -TC /usr/lib/x86_64-linux-gnu/libc++.so.1.0|grep -F 'assign(char
const*, unsigned long)'
00000000000bbf9e w DF .text 00000000000000a2 Base
std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char> >::assign(char const*, unsigned long)
In the header /usr/include/c++/v1/string the string type is typedef-ed from
basic_string:
typedef basic_string<char> string;
I guess it is an Ubuntu packaging issue, the LLVM libs were compiled
with a Standard C++ implementation which differs from the libc++ Ubuntu
package.
I have the following packages installed:
llvm-3.5
llvm-3.5-dev
llvm-3.5-runtime
libc++-dev
libc++-helpers
libc++1
** Affects: llvm-toolchain-3.5 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1427163
Title:
llvm libs don't link with libc++
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