File: undef-suggest-extern-c.s

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# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o

## The reference is mangled while the definition is not, suggest a missing
## extern "C".
# RUN: echo 'call _Z3fooi' | llvm-mc -filetype=obj -triple=x86_64 - -o %t1.o
# RUN: not ld.lld %t.o %t1.o -o /dev/null 2>&1 | FileCheck %s

# CHECK:      error: undefined symbol: foo(int)
# CHECK-NEXT: >>> referenced by {{.*}}
# CHECK-NEXT: >>> did you mean: extern "C" foo

## Don't suggest for nested names like F::foo() and foo::foo().
# RUN: echo 'call _ZN1F3fooEv; call _ZN3fooC1Ev' | llvm-mc -filetype=obj -triple=x86_64 - -o %t2.o
# RUN: not ld.lld %t.o %t2.o -o /dev/null 2>&1 | FileCheck /dev/null --implicit-check-not='did you mean'

.globl _start, foo
_start:
foo: