File: weak-incomplete.c

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llvm-toolchain-4.0 1%3A4.0.1-10~deb9u2
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// RUN: %clang_cc1 -emit-llvm < %s | grep 'extern_weak' | count 1

struct S;
void __attribute__((weak)) foo1(struct S);
void (*foo2)(struct S) = foo1;