0ea3d88bdb
Including select builtin headers in system modules is a workaround for module cycles, primarily in Apple's Darwin module that includes all of its C standard library headers. The workaround is problematic because it doesn't include all of the builtin headers (inttypes.h is notably absent), and it also doesn't include C++ headers. The straightforward for for this is to make top level modules for all of the C standard library headers and unwind.h in C++, clang, and the OS. However, doing so in clang before the OS modules are ready re-introduces the module cycles. Add a -fbuiltin-headers-in-system-modules option to control if the special builtin headers belong to system modules or builtin modules. Pass the option by default for Apple. Reviewed By: ChuanqiXu, Bigcheese, benlangmuir Differential Revision: https://reviews.llvm.org/D159483
31 lines
868 B
Objective-C
31 lines
868 B
Objective-C
// RUN: rm -rf %t
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// RUN: %clang_cc1 -fsyntax-only -internal-isystem %S/Inputs/System/usr/include -fmodules -fimplicit-module-maps -fbuiltin-headers-in-system-modules -fmodules-cache-path=%t -D__need_wint_t -Werror=implicit-function-declaration %s
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@import uses_other_constants;
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const double other_value = DBL_MAX;
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// Supplied by compiler, but referenced from the "/usr/include" module map.
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@import cstd.float_constants;
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float getFltMax(void) { return FLT_MAX; }
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// Supplied by the "/usr/include" module map.
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@import cstd.stdio;
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void test_fprintf(FILE *file) {
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fprintf(file, "Hello, modules\n");
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}
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// Supplied by compiler, which forwards to the "/usr/include" version.
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@import cstd.stdint;
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my_awesome_nonstandard_integer_type value2;
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// Supplied by the compiler; that version wins.
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@import cstd.stdbool;
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#ifndef bool
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# error "bool was not defined!"
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#endif
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