CODEWITHSUNDEEP
gccshared-librariescentos7
Tomáš Zato
Tomáš Zato

Reputation: 53119

Linker cannot find standard c library

I have some problem with libraries on CentOS. I am not sure what's wrong. When I try to make a project, I get this error:

gcc -Wall -Winline -O2 -fPIC -g -D_FILE_OFFSET_BITS=64  -o bzip2 bzip2.o -L. -lbz2
/usr/bin/ld: cannot find -lc
collect2: error: ld returned 1 exit status

I can - and did - make a symlink that links /usr/lib64/libc.so to /usr/lib64/libc-2.17.so which exists, but that just creates another error:

gcc -Wall -Winline -O2 -fPIC -g -D_FILE_OFFSET_BITS=64  -o bzip2 bzip2.o -L. -lbz2
/usr/lib/gcc/x86_64-redhat-linux/4.8.5/crt1.o: In function `_start':
(.text+0x12): undefined reference to `__libc_csu_fini'
/usr/lib/gcc/x86_64-redhat-linux/4.8.5/crt1.o: In function `_start':
(.text+0x19): undefined reference to `__libc_csu_init'
collect2: error: ld returned 1 exit status

Obviously the toolchain is broken. How can I fix it correctly? Making symlinks obviously isn't fixing anything...

I also tried to reinstall whole development toolchain using yum group remove "Development Tools" then yum group install "Development Tools"

Upvotes: 1

Views: 1152

Answers (1)

Maxim Egorushkin
Maxim Egorushkin

Reputation: 136208

/usr/lib64/libc.so is not a symbolic link, it is a linker script.

On Fedora it contains:

/* GNU ld script
   Use the shared library, but some functions are only in
   the static library, so try that secondarily.  */
OUTPUT_FORMAT(elf64-x86-64)
GROUP ( /lib64/libc.so.6 /usr/lib64/libc_nonshared.a  AS_NEEDED ( /lib64/ld-linux-x86-64.so.2 ) )

And, sure enough:

$ nm -C --defined-only /usr/lib64/libc_nonshared.a

elf-init.oS:
0000000000000070 T __libc_csu_fini
0000000000000000 T __libc_csu_init
...

/usr/lib64/libc.so belongs to glibc rpm. I suggest reinstalling it.

Upvotes: 2

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