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When building against the static standard library, we should define `SWIFT_STATIC_STDLIB` to indicate to the shims that the declarations should be giving hidden visibility and default DLL storage. This is required to ensure that these symbols are known to be `dso_local` when compiling to avoid an unnecessary look up through the PLT/GOT or the indirection through the synthesized `__imp_` symbol and the IAT. This corrects a number of incorrect code generation cases on Windows with the static standard library.
6 lines
444 B
Swift
6 lines
444 B
Swift
// RUN: %swift_frontend_plain -parse-stdlib -typecheck %s -dump-clang-diagnostics 2>&1 | %FileCheck %s -check-prefix CHECK-DYNAMIC
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// RUN: %swift_frontend_plain -parse-stdlib -use-static-resource-dir -typecheck %s -dump-clang-diagnostics 2>&1 | %FileCheck %s -check-prefix CHECK-STATIC
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// CHECK-DYNAMIC-NOT: clang importer cc1 args: {{.*}} '-D' 'SWIFT_STATIC_STDLIB'
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// CHECK-STATIC: clang importer cc1 args: {{.*}} '-D' 'SWIFT_STATIC_STDLIB'
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