ee044d5e65
Before this patch, if a module fails to build because of a missing config_macro, the user will never see the config macro warning. This patch diagnoses this before building, and each subsequent time a module is imported. rdar://123921931
77 lines
2.6 KiB
Objective-C
77 lines
2.6 KiB
Objective-C
// This test verifies that config macro warnings are emitted when it looks like
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// the user expected a `#define` to impact the import of a module.
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// RUN: rm -rf %t
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// RUN: split-file %s %t
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// Prebuild the `config` module so it's in the module cache.
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// RUN: %clang_cc1 -std=c99 -fmodules -fimplicit-module-maps -x objective-c -fmodules-cache-path=%t -DWANT_FOO=1 -emit-module -fmodule-name=config %t/module.modulemap
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// Verify that each time the `config` module is imported the current macro state
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// is checked.
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// RUN: %clang_cc1 -std=c99 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -I %t -DWANT_FOO=1 %t/config.m -verify
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// Verify that warnings are emitted before building a module in case the command
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// line macro state causes the module to fail to build.
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// RUN: %clang_cc1 -std=c99 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -I %t %t/config_error.m -verify
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//--- module.modulemap
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module config {
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header "config.h"
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config_macros [exhaustive] WANT_FOO, WANT_BAR
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}
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module config_error {
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header "config_error.h"
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config_macros SOME_VALUE
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}
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//--- config.h
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#ifdef WANT_FOO
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int* foo(void);
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#endif
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#ifdef WANT_BAR
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char *bar(void);
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#endif
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//--- config_error.h
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struct my_thing {
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char buf[SOME_VALUE];
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};
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//--- config.m
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@import config;
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int *test_foo(void) {
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return foo();
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}
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char *test_bar(void) {
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return bar(); // expected-error{{call to undeclared function 'bar'; ISO C99 and later do not support implicit function declarations}} \
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// expected-error{{incompatible integer to pointer conversion}}
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}
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#undef WANT_FOO // expected-note{{macro was #undef'd here}}
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@import config; // expected-warning{{#undef of configuration macro 'WANT_FOO' has no effect on the import of 'config'; pass '-UWANT_FOO' on the command line to configure the module}}
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#define WANT_FOO 2 // expected-note{{macro was defined here}}
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@import config; // expected-warning{{definition of configuration macro 'WANT_FOO' has no effect on the import of 'config'; pass '-DWANT_FOO=...' on the command line to configure the module}}
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#undef WANT_FOO
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#define WANT_FOO 1
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@import config; // okay
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#define WANT_BAR 1 // expected-note{{macro was defined here}}
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@import config; // expected-warning{{definition of configuration macro 'WANT_BAR' has no effect on the import of 'config'; pass '-DWANT_BAR=...' on the command line to configure the module}}
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//--- config_error.m
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#define SOME_VALUE 5 // expected-note{{macro was defined here}}
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@import config_error; // expected-error{{could not build module}} \
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// expected-warning{{definition of configuration macro 'SOME_VALUE' has no effect on the import of 'config_error';}}
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