llvm-project/clang/test/Modules/preprocess-missing.modulemap

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// RUN: %clang_cc1 -fmodules -fmodule-name=A -x c++-module-map %s -emit-module -o /dev/null -verify
module A {
header "does not exist" { size 12345 } // ok, do not need mtime for explicit module build
header "also does not exist" { mtime 12345 }
}
#pragma clang module contents
// expected-error@4 {{cannot emit module A: size must be explicitly specified for missing header file "also does not exist"}}