[Tinycc-devel] Error relocating ./tcc cstr_buf: symbol not found

[Henri Tuhola]

I get these weird errors when I try to compile tcc in musl
environment. musl+tcc also had stdarg.h -issue because musl expects
__builtin_va_start & pals.

The environment was minimal and I issued the commands to compile musl by hand.

/tcc-nonmod # tcc -o tcc tcc.c  -lm -ldl libtcc.c tccpp.c tccgen.c
tccelf.c tccasm.c tccrun.c x86_64-gen.c i386-asm.c -DCONFIG_TCC
_ELFINTERP="\"/lib/ld-musl-x86_64.so.1\"" -DTCC_TARGET_X86_64

When I run my new binary, musl answers with this:

Error relocating ./tcc: cstr_buf: symbol not found
Error relocating ./tcc: macro_ptr_allocated: symbol not found
Error relocating ./tcc: unget_buffer_enabled: symbol not found
Error relocating ./tcc: unget_saved_macro_ptr: symbol not found
Error relocating ./tcc: in_sizeof: symbol not found
Error relocating ./tcc: new_undef_sym: symbol not found
Error relocating ./tcc: func_sub_sp_offset: symbol not found
Error relocating ./tcc: func_ret_sub: symbol not found

address@hidden:~/musl-tcc/sysroot/tcc-nonmod$ nm -D tcc | grep -E " d | b "
0000000008099460 b cstr_buf
000000000809c5e8 b func_ret_sub
000000000809c5e0 b func_sub_sp_offset
0000000008086a34 d in_sizeof
0000000008088b30 b macro_ptr_allocated
0000000008086f9c d new_undef_sym
0000000008088b54 b unget_buffer_enabled
0000000008088b38 b unget_saved_macro_ptr

address@hidden:~/musl-tcc/sysroot/tcc-nonmod$ readelf --dyn-syms
./tcc | grep -E
"cstr_buf|macro_ptr_allocated|unget_buffer_enabled|unget_saved_macro_ptr|in_sizeof|new_undef_sym|func_sub_sp_offset|func_ret_sub"
   101: 0000000008099460    32 OBJECT  LOCAL  DEFAULT    3 cstr_buf
   105: 0000000008088b30     8 OBJECT  LOCAL  DEFAULT    3 macro_ptr_allocated
   106: 0000000008088b54     4 OBJECT  LOCAL  DEFAULT    3 unget_buffer_enabled
   107: 0000000008088b38     8 OBJECT  LOCAL  DEFAULT    3 unget_saved_macro_pt
   113: 0000000008086a34     4 OBJECT  LOCAL  DEFAULT    2 in_sizeof
   123: 0000000008086f9c     4 OBJECT  LOCAL  DEFAULT    2 new_undef_sym
   128: 000000000809c5e0     8 OBJECT  LOCAL  DEFAULT    3 func_sub_sp_offset
   129: 000000000809c5e8     4 OBJECT  LOCAL  DEFAULT    3 func_ret_sub

Friend at #musl told me these records shouldn't end up into dynsym
table. But they should neither appear in the:

address@hidden:~/musl-tcc/sysroot/tcc-nonmod$ readelf -r tccpp.o |
grep -E 
"cstr_buf|macro_ptr_allocated|unget_buffer_enabled|unget_saved_macro_ptr|in_sizeof|new_undef_sym|func_sub_sp_offset|func_ret_sub"
0000000007a8  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
0000000007c3  001300000009 R_X86_64_GOTPCREL 0000000000010998 cstr_buf - 4
0000000007d9  001300000009 R_X86_64_GOTPCREL 0000000000010998 cstr_buf - 4
0000000008c3  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
0000000008f0  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
000000000915  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
000000000931  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
00000000094d  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
0000000009d9  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
0000000009f7  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
000000000a29  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
000000000a61  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
000000000adb  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
000000000b58  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
000000000b76  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
000000000b92  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
000000000de1  001300000002 R_X86_64_PC32     0000000000010998 cstr_buf + 0
000000006e89  000300000009 R_X86_64_GOTPCREL 0000000000000068
macro_ptr_allocated - 4
000000006eae  000600000002 R_X86_64_PC32     000000000000008c
unget_buffer_enabled + 0
000000006ebd  000400000002 R_X86_64_PC32     0000000000000070
unget_saved_macro_ptr + 0
000000006ed3  000600000009 R_X86_64_GOTPCREL 000000000000008c
unget_buffer_enabled - 4
000000006ee2  000300000002 R_X86_64_PC32     0000000000000068
macro_ptr_allocated + 0
000000006f00  000300000009 R_X86_64_GOTPCREL 0000000000000068
macro_ptr_allocated - 4
000000006fa1  000600000002 R_X86_64_PC32     000000000000008c
unget_buffer_enabled + 0
000000006fbf  000400000009 R_X86_64_GOTPCREL 0000000000000070
unget_saved_macro_ptr - 4
000000006fce  000600000009 R_X86_64_GOTPCREL 000000000000008c
unget_buffer_enabled - 4

So perhaps the code generator has a bug? I bet you knew this already.

-- Henri Tuhola