$ cat foo.c
void start(void) asm("start");
void start(void) {}
$ xcrun clang -c -o foo.o foo.c -g3
$ xcrun clang -o foo foo.o -g3 -Wl,-preload -nodefaultlibs

RUN: dsymutil -oso-prepend-path %p/../Inputs %p/../Inputs/private/tmp/preload/foo -o %t.dSYM
RUN: llvm-nm %p/../Inputs/private/tmp/preload/foo | FileCheck %s
RUN: llvm-nm %t.dSYM/Contents/Resources/DWARF/foo | FileCheck %s
CHECK: start