// PCH implies -module-file-deps=all by default.
// RUN: %clang -x c-header %s -o %t.pch -MMD -MT dependencies -MF %t.d -### 2> %t
// RUN: FileCheck %s -input-file=%t
// CHECK: -emit-pch
// CHECK: -dependency-file
// CHECK: "-module-file-deps=all"

// Non-PCH does not get module-file-deps.
// RUN: %clang -c %s -o %t -MMD -MT dependencies -MF %t.d -### 2> %t
// RUN: FileCheck %s -check-prefix=CHECK-NOPCH -input-file=%t
// CHECK-NOPCH: -dependency-file
// CHECK-NOPCH-NOT: -module-file-deps=

// -fno-module-file-deps overrides PCH default.
// RUN: %clang -x c-header %s -o %t.pch -MMD -MT dependencies -MF %t.d \
// RUN:     -fno-module-file-deps -### 2> %t
// RUN: FileCheck %s -check-prefix=CHECK-EXPLICIT -input-file=%t
// CHECK-EXPLICIT: -dependency-file
// CHECK-EXPLICIT-NOT: -module-file-deps=

// Explicit -fmodule-file-deps on non-PCH.
// RUN: %clang -x c++ %s -o %t.o -MMD -MT dependencies -MF %t.d -fmodule-file-deps -### 2> %t
// RUN: FileCheck %s -check-prefix=CHECK-EXPLICIT-NOPCH -input-file=%t
// CHECK-EXPLICIT-NOPCH: -dependency-file
// CHECK-EXPLICIT-NOPCH: "-module-file-deps=all"