c2132d8f33
headers even if they arrived when merging non-system modules. The idea of this code is that we don't want to warn the user about macros defined multiple times by their system headers with slightly different definitions. We should have this behavior if either the macro comes from a system module, or the definition within the module comes from a system header. Previously, we would warn on ambiguous macros being merged when they came from a users modules even though they only showed up via system headers. By surviving this we can handle common system header macro differences like differing 'const' qualification of pointers due to some headers predating 'const' being valid in C code, even when those systems headers are pre-built into a system module. Differential Revision: http://reviews.llvm.org/D8310 llvm-svn: 232149
116 lines
4.6 KiB
C++
116 lines
4.6 KiB
C++
// RUN: rm -rf %t
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// RUN: cd %S
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//
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// RUN: %clang_cc1 -fmodules -x c++ -fmodules-cache-path=%t \
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// RUN: -v \
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// RUN: -iquote Inputs/macro-ambiguity/a/quote \
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// RUN: -isystem Inputs/macro-ambiguity/a/system \
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// RUN: -fno-implicit-modules -fno-modules-implicit-maps \
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// RUN: -fmodule-map-file-home-is-cwd \
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// RUN: -emit-module -fmodule-name=a -o %t/a.pcm \
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// RUN: Inputs/macro-ambiguity/module.modulemap
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//
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// RUN: %clang_cc1 -fmodules -x c++ -fmodules-cache-path=%t \
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// RUN: -v \
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// RUN: -iquote Inputs/macro-ambiguity/b/quote \
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// RUN: -isystem Inputs/macro-ambiguity/b/system \
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// RUN: -fno-implicit-modules -fno-modules-implicit-maps \
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// RUN: -fmodule-map-file-home-is-cwd \
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// RUN: -emit-module -fmodule-name=b -o %t/b.pcm \
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// RUN: Inputs/macro-ambiguity/module.modulemap
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//
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// RUN: %clang_cc1 -fmodules -x c++ -fmodules-cache-path=%t \
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// RUN: -v \
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// RUN: -iquote Inputs/macro-ambiguity/c/quote \
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// RUN: -isystem Inputs/macro-ambiguity/c/system \
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// RUN: -fno-implicit-modules -fno-modules-implicit-maps \
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// RUN: -fmodule-map-file-home-is-cwd \
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// RUN: -emit-module -fmodule-name=c -o %t/c.pcm \
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// RUN: Inputs/macro-ambiguity/module.modulemap
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//
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// RUN: %clang_cc1 -fmodules -x c++ -fmodules-cache-path=%t \
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// RUN: -v \
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// RUN: -iquote Inputs/macro-ambiguity/d/quote \
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// RUN: -isystem Inputs/macro-ambiguity/d/system \
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// RUN: -fno-implicit-modules -fno-modules-implicit-maps \
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// RUN: -fmodule-map-file-home-is-cwd \
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// RUN: -emit-module -fmodule-name=d -o %t/d.pcm \
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// RUN: Inputs/macro-ambiguity/module.modulemap
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//
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// RUN: %clang_cc1 -fmodules -x c++ -fmodules-cache-path=%t \
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// RUN: -v \
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// RUN: -iquote Inputs/macro-ambiguity/a/quote \
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// RUN: -isystem Inputs/macro-ambiguity/a/system \
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// RUN: -iquote Inputs/macro-ambiguity/b/quote \
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// RUN: -isystem Inputs/macro-ambiguity/b/system \
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// RUN: -iquote Inputs/macro-ambiguity/c/quote \
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// RUN: -isystem Inputs/macro-ambiguity/c/system \
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// RUN: -iquote Inputs/macro-ambiguity/d/quote \
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// RUN: -isystem Inputs/macro-ambiguity/d/system \
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// RUN: -iquote Inputs/macro-ambiguity/e/quote \
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// RUN: -isystem Inputs/macro-ambiguity/e/system \
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// RUN: -fno-implicit-modules -fno-modules-implicit-maps \
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// RUN: -fmodule-map-file-home-is-cwd \
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// RUN: -fmodule-map-file=Inputs/macro-ambiguity/module.modulemap \
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// RUN: -fmodule-file=%t/a.pcm \
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// RUN: -fmodule-file=%t/b.pcm \
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// RUN: -fmodule-file=%t/c.pcm \
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// RUN: -fmodule-file=%t/d.pcm \
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// RUN: -Wambiguous-macro -verify macro-ambiguity.cpp
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// Include the textual headers first to maximize the ways in which things can
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// become ambiguous.
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#include "e_quote.h"
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#include <e_system.h>
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#include "a_quote.h"
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#include <a_system.h>
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#include "b_quote.h"
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#include <b_system.h>
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#include "c_quote.h"
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#include <c_system.h>
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#include "d_quote.h"
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#include <d_system.h>
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int test(int x) {
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// We expect to get warnings for all of the quoted includes but none of the
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// system includes here because the first module is a non-system module and
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// the quote macros come from non-system-headers.
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x = FOO1_QUOTE(x); // expected-warning {{ambiguous expansion of macro}}
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// expected-note@Inputs/macro-ambiguity/c/quote/c_quote.h:4 {{expanding this definition}}
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// expected-note@Inputs/macro-ambiguity/a/quote/a_quote.h:4 {{other definition}}
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x = FOO1_SYSTEM(x);
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x = BAR1_QUOTE(x); // expected-warning {{ambiguous expansion of macro}}
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// expected-note@Inputs/macro-ambiguity/d/quote/d_quote.h:4 {{expanding this definition}}
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// expected-note@Inputs/macro-ambiguity/a/quote/a_quote.h:5 {{other definition}}
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x = BAR1_SYSTEM(x);
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x = BAZ1_QUOTE(x); // expected-warning {{ambiguous expansion of macro}}
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// expected-note@Inputs/macro-ambiguity/a/quote/a_quote.h:6 {{expanding this definition}}
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// expected-note@Inputs/macro-ambiguity/e/quote/e_quote.h:4 {{other definition}}
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x = BAZ1_SYSTEM(x);
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// Here, we don't even warn on bar because in that cas both b and d are
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// system modules and so the use of non-system headers is irrelevant.
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x = FOO2_QUOTE(x); // expected-warning {{ambiguous expansion of macro}}
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// expected-note@Inputs/macro-ambiguity/c/quote/c_quote.h:5 {{expanding this definition}}
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// expected-note@Inputs/macro-ambiguity/b/quote/b_quote.h:4 {{other definition}}
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x = FOO2_SYSTEM(x);
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x = BAR2_QUOTE(x);
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x = BAR2_SYSTEM(x);
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x = BAZ2_QUOTE(x); // expected-warning {{ambiguous expansion of macro}}
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// expected-note@Inputs/macro-ambiguity/b/quote/b_quote.h:6 {{expanding this definition}}
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// expected-note@Inputs/macro-ambiguity/e/quote/e_quote.h:5 {{other definition}}
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x = BAZ2_SYSTEM(x);
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return x;
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}
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