Date: Thu, 23 Aug 2012 14:24:17 +0200 From: John Spencer <maillist-musl@...fooze.de> To: musl@...ts.openwall.com CC: Richard Pennington <rich@...nware.com> Subject: Re: build musl with clang On 08/23/2012 09:53 AM, agent wrote: > > if i use musl's ld-musl (as far as i can notice it is just symlink to > libc.so) i get a segfault. gdb says: > > (gdb) r > Starting program: /home/agent/dev/musl/musl-0.9.4_clang/lib/t.out > > Program received signal SIGSEGV, Segmentation fault. > 0xb7f9d73a in find_sym () from /lib/ld-musl-i386.so.1 > (gdb) where > #0 0xb7f9d73a in find_sym () from /lib/ld-musl-i386.so.1 > > btw, exactly the same things happen when i try it with gcc (4.6.3 from > ubuntu). this sounds as if the binary uses gnu hash as opposed to sysv hash. did you use ./configure ? see FAQ in http://wiki.musl-libc.org > > if i compile statically with gcc the program works fine, but with > clang it even does not compile (i mean link): > > /opt/musl-clang/lib/libc.a(vfprintf.o): In function `printf_core': > src/stdio/vfprintf.c:(.text+0x1088): undefined reference to `__udivdi3' > src/stdio/vfprintf.c:(.text+0x10a6): undefined reference to `__umoddi3' > these functions are part of libgcc as nsz already stated. > maybe it is impossible to compile a working musl with clang at this > stage, maybe a quick fix can be applied (: > there is another known bug in clang which will lead to calloc getting wrongly optimized away, because clang disrespects -ffree-standing. Richard Pennington wanted to reported this to the LLVM maillist months ago, but afaik he still hasn't done this.
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