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Stop wrapping __has_include in another macro

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Summary:
This is not guaranteed to work since the characters after '__has_include('
have special lexing rules that can't possibly be applied when
__has_include is generated by a macro. It also breaks the crash reproducers
generated by -frewrite-includes (see https://llvm.org/pr37990).

Reviewers: EricWF, rsmith, mclow.lists
Reviewed By: mclow.lists
Differential Revision: https://reviews.llvm.org/D49067

llvm-svn: 337824
This commit is contained in:
Alexander Richardson 2018-07-24 12:40:56 +00:00
parent 63600c7487
commit 2a6a3fc4a3
2 changed files with 6 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
libcxx/include/__config
View File

@ -149,10 +149,8 @@
#define __has_keyword(__x) !(__is_identifier(__x))
#ifdef __has_include
# define __libcpp_has_include(__x) __has_include(__x)
#else
# define __libcpp_has_include(__x) 0
#ifndef __has_include
#define __has_include(...) 0
#endif
#if defined(__clang__)
@ -1066,7 +1064,7 @@ _LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
defined(__APPLE__) || \
defined(__CloudABI__) || \
defined(__sun__) || \
(defined(__MINGW32__) && __libcpp_has_include(<pthread.h>))
(defined(__MINGW32__) && __has_include(<pthread.h>))
# define _LIBCPP_HAS_THREAD_API_PTHREAD
# elif defined(_LIBCPP_WIN32API)
# define _LIBCPP_HAS_THREAD_API_WIN32

8
libcxx/test/support/test_macros.h
View File

@ -27,10 +27,8 @@
#define TEST_HAS_FEATURE(X) 0
#endif
#ifdef __has_include
#define TEST_HAS_INCLUDE(X) __has_include(X)
#else
#define TEST_HAS_INCLUDE(X) 0
#ifndef __has_include
#define __has_include(...) 0
#endif
#ifdef __has_extension
@ -90,7 +88,7 @@
#endif
// Attempt to deduce GCC version
#if defined(_LIBCPP_VERSION) && TEST_HAS_INCLUDE(<features.h>)
#if defined(_LIBCPP_VERSION) && __has_include(<features.h>)
#include <features.h>
#define TEST_HAS_GLIBC
#define TEST_GLIBC_PREREQ(major, minor) __GLIBC_PREREQ(major, minor)