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LLD is unable to link musl for x32 #140465

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LLD is unable to link musl for x32#140465
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lld:ELF
@alexrp

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@alexrp
alexrp
opened on May 18, 2025
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Repro:

$ git clone https://git.musl-libc.org/git/musl
$ cd musl
$ ./configure --prefix=$PWD/build/x32 --target=x86_64-linux-muslx32 AR="llvm-ar" CC="clang" RANLIB="llvm-ranlib" CFLAGS="--target=x86_64-linux-muslx32 -fuse-ld=lld"
$ make -j$(nproc)

You should see link errors like this:

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/exit/atexit.lo
>>> referenced by atexit.c
>>>               obj/src/exit/atexit.lo:(__atexit_lockptr)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/linux/membarrier.lo
>>> referenced by membarrier.c
>>>               obj/src/linux/membarrier.lo:(.data.rel.ro..L__const.__membarrier.sa+0x0)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/c_locale.lo
>>> referenced by c_locale.c
>>>               obj/src/locale/c_locale.lo:(__c_dot_utf8)

ld.lld: error: relocation R_X86_64_32 cannot be used against symbol '__c_dot_utf8'; recompile with -fPIC
>>> defined in obj/src/locale/c_locale.lo
>>> referenced by c_locale.c
>>>               obj/src/locale/c_locale.lo:(__c_dot_utf8_locale)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/dcngettext.lo
>>> referenced by dcngettext.c
>>>               obj/src/locale/dcngettext.lo:(__gettext_lockptr)

ld.lld: error: relocation R_X86_64_32 cannot be used against symbol '__locale_lock'; recompile with -fPIC
>>> defined in obj/src/locale/locale_map.lo
>>> referenced by locale_map.c
>>>               obj/src/locale/locale_map.lo:(__locale_lockptr)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/malloc/lite_malloc.lo
>>> referenced by lite_malloc.c
>>>               obj/src/malloc/lite_malloc.lo:(__bump_lockptr)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

In case it's helpful:

❯ llvm-readelf -sr obj/src/locale/localeconv.lo

Relocation section '.rela.text.localeconv' at offset 0x10c contains 1 entries:
 Offset     Info    Type                Sym. Value  Symbol's Name + Addend
00000002  00000402 R_X86_64_PC32          00000000   .data.rel.ro.posix_lconv - 4

Relocation section '.rela.data.rel.ro.posix_lconv' at offset 0x118 contains 10 entries:
 Offset     Info    Type                Sym. Value  Symbol's Name + Addend
00000000  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 0
00000004  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000008  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
0000000c  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000010  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000014  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000018  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
0000001c  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000020  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000024  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2

Symbol table '.symtab' contains 6 entries:
   Num:    Value  Size Type    Bind   Vis       Ndx Name
     0: 00000000     0 NOTYPE  LOCAL  DEFAULT   UND
     1: 00000000     0 FILE    LOCAL  DEFAULT   ABS localeconv.c
     2: 00000000    56 OBJECT  LOCAL  DEFAULT     6 posix_lconv
     3: 00000000     0 SECTION LOCAL  DEFAULT     5 .rodata.str1.1
     4: 00000000     0 SECTION LOCAL  DEFAULT     6 .data.rel.ro.posix_lconv
     5: 00000000     7 FUNC    GLOBAL DEFAULT     3 localeconv

I'm labeling this as an LLD bug, but for all I know it could be an LLVM backend bug too; please relabel if needed.

Activity

alexrp
added
lld:ELF
on May 18, 2025
alexrp
added the
Bug
issue type on May 18, 2025
llvmbot

llvmbot commented on May 18, 2025

@llvmbot
llvmbot
on May 18, 2025
Member

@llvm/issue-subscribers-lld-elf

Author: Alex Rønne Petersen (alexrp)

Repro: 
$ git clone https://git.musl-libc.org/git/musl
$ cd musl
$ ./configure --prefix=$PWD/build/x32 --target=x86_64-linux-muslx32 AR="llvm-ar" CC="clang" RANLIB="llvm-ranlib" CFLAGS="--target=x86_64-linux-muslx32 -fuse-ld=lld"
$ make -j$(nproc)

You should see link errors like this:

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/exit/atexit.lo
>>> referenced by atexit.c
>>>               obj/src/exit/atexit.lo:(__atexit_lockptr)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/linux/membarrier.lo
>>> referenced by membarrier.c
>>>               obj/src/linux/membarrier.lo:(.data.rel.ro..L__const.__membarrier.sa+0x0)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/c_locale.lo
>>> referenced by c_locale.c
>>>               obj/src/locale/c_locale.lo:(__c_dot_utf8)

ld.lld: error: relocation R_X86_64_32 cannot be used against symbol '__c_dot_utf8'; recompile with -fPIC
>>> defined in obj/src/locale/c_locale.lo
>>> referenced by c_locale.c
>>>               obj/src/locale/c_locale.lo:(__c_dot_utf8_locale)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/dcngettext.lo
>>> referenced by dcngettext.c
>>>               obj/src/locale/dcngettext.lo:(__gettext_lockptr)

ld.lld: error: relocation R_X86_64_32 cannot be used against symbol '__locale_lock'; recompile with -fPIC
>>> defined in obj/src/locale/locale_map.lo
>>> referenced by locale_map.c
>>>               obj/src/locale/locale_map.lo:(__locale_lockptr)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/malloc/lite_malloc.lo
>>> referenced by lite_malloc.c
>>>               obj/src/malloc/lite_malloc.lo:(__bump_lockptr)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

ld.lld: error: relocation R_X86_64_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in obj/src/locale/localeconv.lo
>>> referenced by localeconv.c
>>>               obj/src/locale/localeconv.lo:(posix_lconv)

In case it's helpful:

❯ llvm-readelf -sr obj/src/locale/localeconv.lo

Relocation section '.rela.text.localeconv' at offset 0x10c contains 1 entries:
 Offset     Info    Type                Sym. Value  Symbol's Name + Addend
00000002  00000402 R_X86_64_PC32          00000000   .data.rel.ro.posix_lconv - 4

Relocation section '.rela.data.rel.ro.posix_lconv' at offset 0x118 contains 10 entries:
 Offset     Info    Type                Sym. Value  Symbol's Name + Addend
00000000  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 0
00000004  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000008  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
0000000c  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000010  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000014  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000018  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
0000001c  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000020  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2
00000024  0000030a R_X86_64_32            00000000   .rodata.str1.1 + 2

Symbol table '.symtab' contains 6 entries:
   Num:    Value  Size Type    Bind   Vis       Ndx Name
     0: 00000000     0 NOTYPE  LOCAL  DEFAULT   UND
     1: 00000000     0 FILE    LOCAL  DEFAULT   ABS localeconv.c
     2: 00000000    56 OBJECT  LOCAL  DEFAULT     6 posix_lconv
     3: 00000000     0 SECTION LOCAL  DEFAULT     5 .rodata.str1.1
     4: 00000000     0 SECTION LOCAL  DEFAULT     6 .data.rel.ro.posix_lconv
     5: 00000000     7 FUNC    GLOBAL DEFAULT     3 localeconv

I'm labeling this as an LLD bug, but for all I know it could be an LLVM backend bug too; please relabel if needed.

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          LLD is unable to link musl for x32 · Issue #140465 · llvm/llvm-project