https://llvm.org/bugs/show_bug.cgi?id=27447
Bug ID: 27447
Summary: [LTO] Symbol lookup error when linking with shared
libraries
Product: lld
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: unassignedb...@nondot.org
Reporter: dav...@freebsd.org
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
$ cat try.sh
rm -rf main-lld libshlld.so
./clang shared.cpp -o libshlld.so -shared -fPIC -fuse-ld=lld -flto
./clang main.cpp -L. -o main-lld -fuse-ld=lld -flto -lshlld
./main-lld
./main-lld: symbol lookup error: ./libshlld.so: undefined symbol: _ZSt4cout
$ cat main.cpp
int
main(void)
{
return (0);
}
[davide@localhost bin]$ cat shared.cpp
#include <iostream>
int f(); // forward declaration
int g(); // forward declaration
int x = f();
int y = g();
int f()
{
std::cout << "using 'y' (which is " << y << ")\n";
return 3*y + 7;
}
int g()
{
std::cout << "initializing 'y'\n";
return 5;
}
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