$ clang-cpp main.c                                                                                                                                                                                                                                                                     
# 1 "main.c"
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 344 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "main.c" 2

"abc"