Unable to write strings with curly braces inside inline assembler code

Issue

• Writing inline assembler code as below:

void f()
{
  asm ( ".pushsection \".foo\"; .asciz \"div { width : 50%% | height = 10px } \"; .long %c0; .popsection" : : "i"(42) );
}

results in invalid output after compilation with gcc:

    .file   "asm-curly.c"
    .text
    .globl  f
    .type   f, @function
f:
.LFB0:
    .cfi_startproc
    pushq   %rbp
    .cfi_def_cfa_offset 16
    .cfi_offset 6, -16
    movq    %rsp, %rbp
    .cfi_def_cfa_register 6
#APP
# 3 "asm-curly.c" 1
    .pushsection ".data";foo1:; .asciz "div  width : 50%  "; .long 42; .popsection
# 0 "" 2
#NO_APP
    popq    %rbp
    .cfi_def_cfa 7, 8
    ret
    .cfi_endproc
.LFE0:
    .size   f, .-f
    .ident  "GCC: (GNU) 4.6.3 20120306 (Red Hat 4.6.3-2)"
    .section    .note.GNU-stack,"",@progbits