[llvm-dev] LLD-linked binary segfaults at runtime on alpine linux

[Andrew Kelley via llvm-dev]

Alpine linux is a distribution that uses musl libc instead glibc. Here are
my steps to reproduce:

On Alpine linux, download LLVM, Clang, LLD 6.0.0 from releases.llvm.org,
and build them from source.

$ clang -c hello_world.c
$ ld.lld  --gc-sections -m elf_x86_64 -o hello_world
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/Scrt1.o
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/crti.o
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/crtbegin.o -L
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib -L
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0 -dynamic-linker
/lib/../lib/ld-musl-x86_64.so.1 hello_world.o -lgcc --as-needed -lgcc_s
--no-as-needed -lc -lm -lgcc --as-needed -lgcc_s --no-as-needed
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/crtend.o
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/crtn.o
$ ./hello_world
Segmentation fault (core dumped)

Now try with binutils:
$ ld  --gc-sections -m elf_x86_64 -o hello_world
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/Scrt1.o
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/crti.o
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/crtbegin.o -L
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib -L
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0 -dynamic-linker
/lib/../lib/ld-musl-x86_64.so.1 hello_world.o -lgcc --as-needed -lgcc_s
--no-as-needed -lc -lm -lgcc --as-needed -lgcc_s --no-as-needed
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/crtend.o
/usr/lib/gcc/x86_64-alpine-linux-musl/6.4.0/../../../../lib/crtn.o
$ ./hello_world
Hello, World!


Does the linker line look ok? Should I file a bug?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180402/d3666e25/attachment.html>