I'm writting a program that relies on a shared object libLTK.so
I also write the code of libLTK.so which relies on libunwind.so
libunwind.so was fetched using regular package installation.
I am able to compile libLTK.so and the resulting ELF dependency shows :
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: [libunwind.so.8]
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x000000000000000c (INIT) 0x1000
0x000000000000000d (FINI) 0x35cc
0x0000000000000019 (INIT_ARRAY) 0x5df8
0x000000000000001b (INIT_ARRAYSZ) 8 (bytes)
0x000000000000001a (FINI_ARRAY) 0x5e00
0x000000000000001c (FINI_ARRAYSZ) 8 (bytes)
0x000000006ffffef5 (GNU_HASH) 0x260
0x0000000000000005 (STRTAB) 0x700
0x0000000000000006 (SYMTAB) 0x310
0x000000000000000a (STRSZ) 471 (bytes)
0x000000000000000b (SYMENT) 24 (bytes)
0x0000000000000003 (PLTGOT) 0x6000
0x0000000000000002 (PLTRELSZ) 528 (bytes)
0x0000000000000014 (PLTREL) RELA
0x0000000000000017 (JMPREL) 0xa18
0x0000000000000007 (RELA) 0x970
0x0000000000000008 (RELASZ) 168 (bytes)
0x0000000000000009 (RELAENT) 24 (bytes)
0x000000006ffffffe (VERNEED) 0x930
0x000000006fffffff (VERNEEDNUM) 1
0x000000006ffffff0 (VERSYM) 0x8d8
0x000000006ffffff9 (RELACOUNT) 3
0x0000000000000000 (NULL) 0x0
I am not able to compile the final program getting this errors :
/usr/bin/ld: /usr/lib64/libLTK.so: undefined reference to `_Ux86_64_init_local'
/usr/bin/ld: /usr/lib64/libLTK.so: undefined reference to `_Ux86_64_step'
/usr/bin/ld: /usr/lib64/libLTK.so: undefined reference to `_Ux86_64_get_proc_name'
Here is what I do to compile :
$ make -C PROJECT
make: Entering directory '/home/lewis/Documents/libltk/PROJECT'
mkdir -p bin
gcc -Wall -Wno-undef -g -c -fPIC -pedantic -o bin/instance.o src/instance.c -D_XOPEN_SOURCE=700 -DVER=\"\" -Iinclude
gcc -Wall -Wno-undef -g -c -fPIC -pedantic -o bin/utils.o src/utils.c -D_XOPEN_SOURCE=700 -DVER=\"\" -Iinclude
gcc -shared -o bin/lib.so bin/instance.o bin/utils.o -lunwind
make: Leaving directory '/home/lewis/Documents/libltk/PROJECT'
$ gcc -Wall -g -o main main.c dummy.c -lLTK -lunwind
/usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/10/../../../../lib64/libLTK.so: undefined reference to `_Ux86_64_init_local'
/usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/10/../../../../lib64/libLTK.so: undefined reference to `_Ux86_64_step'
/usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/10/../../../../lib64/libLTK.so: undefined reference to `_Ux86_64_get_proc_name'
collect2: error: ld returned 1 exit status
[lewis@lan-portable libltk]$ gcc -Wall -g -o main main.c dummy.c -LPROJECT/bin -lLTK -L/usr/lib64 -lunwind
/usr/bin/ld: /usr/lib64/libLTK.so: undefined reference to `_Ux86_64_init_local'
/usr/bin/ld: /usr/lib64/libLTK.so: undefined reference to `_Ux86_64_step'
/usr/bin/ld: /usr/lib64/libLTK.so: undefined reference to `_Ux86_64_get_proc_name'
collect2: error: ld returned 1 exit status
$ ll /usr/lib64 | grep unwind
lrwxrwxrwx. 1 root root 27 Jan 31 16:35 libunwind-coredump.so -> libunwind-coredump.so.0.0.0
lrwxrwxrwx. 1 root root 27 Jan 31 16:35 libunwind-coredump.so.0 -> libunwind-coredump.so.0.0.0
-rwxr-xr-x. 1 root root 19992 Jan 31 16:35 libunwind-coredump.so.0.0.0
lrwxrwxrwx. 1 root root 19 Jan 31 16:35 libunwind-generic.so -> libunwind-x86_64.so
-rw-r--r--. 1 root root 89444 Jan 31 16:35 libunwind-ptrace.a
lrwxrwxrwx. 1 root root 18 Jan 31 16:35 libunwind.so -> libunwind.so.8.0.1
lrwxrwxrwx. 1 root root 18 Jan 31 16:35 libunwind.so.8 -> libunwind.so.8.0.1
-rwxr-xr-x. 1 root root 62008 Jan 31 16:35 libunwind.so.8.0.1
lrwxrwxrwx. 1 root root 25 Jan 31 16:35 libunwind-x86_64.so -> libunwind-x86_64.so.8.0.1
lrwxrwxrwx. 1 root root 25 Jan 31 16:35 libunwind-x86_64.so.8 -> libunwind-x86_64.so.8.0.1
-rwxr-xr-x. 1 root root 78600 Jan 31 16:35 libunwind-x86_64.so.8.0.1
Can you help me?
