<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/126174>126174</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [X86][compiler-rt][builtin] Static Link Failure Caused by the Builtins Function Dependence on libm
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          zhangtianhao6
      </td>
    </tr>
</table>

<pre>
    case:
```
#include <complex.h>

int
test (long double _Complex x, long double _Complex ref)
{
        long double re, im;

        re = creall(ref);
        im = cimagl(ref);
 return x / ref;
}

int main (){
        long double _Complex x;
 long double _Complex ref;
        test(x, ref);
}
```


**compiler-rt** options: -rtlib=compiler-rt   -static  -unwindlib=libunwind -lm
failed:
```
/opt/compiler-explorer/gcc-snapshot/lib/gcc/x86_64-linux-gnu/15.0.1/../../../../x86_64-linux-gnu/bin/ld: /opt/compiler-explorer/clang-trunk-20250206/lib/clang/21/lib/x86_64-unknown-linux-gnu/libclang_rt.builtins.a(divxc3.c.o): in function `__divxc3':
divxc3.c:(.text+0x47): undefined reference to `fmaxl'
/opt/compiler-explorer/gcc-snapshot/lib/gcc/x86_64-linux-gnu/15.0.1/../../../../x86_64-linux-gnu/bin/ld: divxc3.c:(.text+0x4f): undefined reference to `logbl'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Compiler returned: 1
```
https://godbolt.org/z/Ks61aGoqs

**libgcc** options: -static   
link ok.
https://godbolt.org/z/qo1cPYo31


**Reason**:
The __divxc3 symbol of the builtin function in compiler-rt depends on the fmaxl and logbl symbols of libm. The ld linker fails to be statically linked.
But the  __divxc3 symbol in libgcc doesn't depend on the fmaxl and logbl symbols of libm. 

Is this a bug and is there a plan to fix it or a means to circumvent it? 
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzMVU1v4zYQ_TX0ZSBBIm1ZPvggx1VRtIei7aE9BRQ1tthQpJcfjrK_viAlZ72bpN1jAyGJyOHjvDdvRtw5edaIe7I5kM1xxYMfjN1_Hrg-e8n1wE216kz_shfcIWENKRpSFctTNIQyqYUKPQJhD8KMF4VTPhD2Q9wsGqk9KRqPzgOhtTL6DL0JnUJ4fJiDYSL0Ad7dsXgidBeBtgdSNLD83MdajKflSNhhvvAWZGNCRxAWuVKE1gsWuweS4xwjR35-E2PRB6thAkLblMl8w_b4SgxGLnWkFQ99mOEdzxn4Q6pf5RYlI7RO4tzntSRwX4L5ofGJBZAKbWb9vADm4qXRjrAGMuuV7Ag73kUBQOY891IAZEE_S93PMUp28ytkaiRFc-JSYf-eAVpz8YS2r6A4XZSxaAltz0JkTvOLG0wMichpkdB2qqvHap0pqcOUnXUgtC03eZGXhLZ5_vbXO_Gd1BE0JgX_moZQXJ8zb4N-ymhBNwUtqtd00iahLS1fl5a7gn7S5ll_daeSXTrwaH3eBam81C7nhNa9vE6C5SI3qVQNSA2noEVUH0hVPD7OEYRuZxFvB-IbrXOPkyf0UEzr7QIQdI8nqbGP9UeLWiB4E7FOI59UBPrfyP8hmdN_klHm3C1k5lKwBtBaY-M_SuontCDMOHLdw2xCeJZ-AJykB2F6hDL2YHAI2TViOkSQ-moEj9rPA-RhUWfp6mRkKL-x8uD9xSUGbdTJ9J1RPjc2uuMzoe3Prir5j-aTu-84Jbuk6Jtmu3UVkKKJNMA85d9xySdTil__Mqz8prN_Q-4im_SaDPTHgHBzFbiXsTMKzAn8gLA484sBpYb7pu_xgrp3YHQKT36CKHAqxgLmIpqS3ZhDvEr1t2rEKriodIcws-RKvcy7feR4CD7hvklPapj1gt6g04Rub7l8dyqzJj858IN0wKEL5xQu4wpaBA4XxXVM7yQnkB6MBQ4jcp1yFtKKMF5Re5CesBZW_Z71O7bjK9yXW1bXux0t2GrYCyz7U80E3_LNuqu2XYVVue52Rc03jHf1Su6XYbItGGOU5WVfY73mdCewZgWtybrAkUuVK3UdY41X0rmA-5JW5Xa9UrxD5dKXl1KNz5B2CaXxQ2z38VDWhbMj60JJ590XGC-9Sp_sP-uKbI5kc7gf_GlhsQDZHOH32Ym_RBO2XKpgER54cNhD95JUPyyTDNqbYY6pKqlNTSrauApW7b9xr_RD6HJhxjgI1PX2J7tY8zeKOHMSJReny8z5uqf_BAAA__8fS6NF">