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Kernel and Embedded Linux
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// RUN: %clang_cc1 -D FOOBAR="\"\"" %s -emit-pch -o %t.pch // RUN: %clang_cc1 -D FOOBAR="\"\"" %s -include-pch %t.pch // rdar://11418366 #ifndef HEADER #define HEADER extern int printf(const char *restrict, ...); #define LOG printf(FOOBAR "%f", __LINE__) #else void foo() { LOG; } #endif