[Bug c++/90793] New: adding -fPIC leads to compilation error

[zhonghao at pku dot org.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90793

            Bug ID: 90793
           Summary: adding -fPIC leads to compilation error
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zhonghao at pku dot org.cn
  Target Milestone: ---

My gcc is 10.0.0, and my code is:

void
f(void)
{
 __asm volatile("" : : "i" (f));
}

It compiles well, but after adding -fPIC, I got a message:

source>: In function 'void f()':

<source>:4:32: warning: 'asm' operand 0 probably does not match constraints

    4 |  __asm volatile("" : : "i" (f));

      |                                ^

<source>:4:32: error: impossible constraint in 'asm'

Compiler returned: 1