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Add a callback for
__has_include
and use it for dependency scanning.
This adds a preprocessor callback for the `__has_include` and `__has_include_next` directives. Successful checking for the presence of a header should add it to the list of header dependencies so this overrides the callback in the dependency scanner. Patch by Pete Cooper with some additions by me. rdar://problem/39545636 Differential Revision: https://reviews.llvm.org/D30882 llvm-svn: 342517
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// REQUIRES: shell | ||
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// Basic test | ||
// RUN: rm -rf %t.dir | ||
// RUN: mkdir %t.dir | ||
// RUN: mkdir %t.dir/a | ||
// RUN: echo "#ifndef HEADER_A" > %t.dir/a/header.h | ||
// RUN: echo "#define HEADER_A" >> %t.dir/a/header.h | ||
// RUN: echo "#endif" >> %t.dir/a/header.h | ||
// RUN: mkdir %t.dir/system | ||
// RUN: echo "#define SYSTEM_HEADER" > %t.dir/system/system-header.h | ||
// RUN: mkdir %t.dir/next-a | ||
// RUN: echo "#if __has_include_next(<next-header.h>)" > %t.dir/next-a/next-header.h | ||
// RUN: echo "#endif" >> %t.dir/next-a/next-header.h | ||
// RUN: mkdir %t.dir/next-b | ||
// RUN: echo "#define NEXT_HEADER" > %t.dir/next-b/next-header.h | ||
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// RUN: %clang -MD -MF %t.dir/file.deps %s -fsyntax-only -I %t.dir -isystem %t.dir/system -I %t.dir/next-a -I %t.dir/next-b | ||
// RUN: FileCheck -input-file=%t.dir/file.deps %s | ||
// CHECK: dependency-gen-has-include.o | ||
// CHECK: dependency-gen-has-include.c | ||
// CHECK: a/header.h | ||
// CHECK-NOT: missing/file.h | ||
// CHECK: system/system-header.h | ||
// CHECK: next-a/next-header.h | ||
// CHECK: next-b/next-header.h | ||
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// Verify that we ignore system headers in user-only headers mode. | ||
// RUN: %clang -MMD -MF %t.dir/user-headers.deps %s -fsyntax-only -I %t.dir -isystem %t.dir/system -I %t.dir/next-a -I %t.dir/next-b | ||
// RUN: FileCheck -input-file=%t.dir/user-headers.deps --check-prefix CHECK-USER-HEADER %s | ||
// CHECK-USER-HEADER-NOT: system/system-header.h | ||
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#if __has_include("a/header.h") | ||
#endif | ||
#if __has_include("missing/file.h") | ||
#endif | ||
#if __has_include(<system-header.h>) | ||
#endif | ||
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#include <next-header.h> |