From c3bd5ffdc8a3b459f18ba6e35fca93e29f3b0ab0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Tor=20Arne=20Vestb=C3=B8?= Date: Sun, 8 Dec 2019 23:47:10 +0100 Subject: Don't wrap feature detection macros with QT_HAS_FOO() variants Using wrappers for these macros is problematic when for example passing the -frewrite-includes flag to preprocess sources before shipping off to distcc or Icecream. It will also start producing warnings when compilers implement http://eel.is/c++draft/cpp.cond#7.sentence-2. See for example https://reviews.llvm.org/D49091 Both https://clang.llvm.org/docs/LanguageExtensions.html and the SD-6 document at https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations recommend defining '__has_foo(x) 0' as a fallback for compilers without the macros, so that's what we go for. Change-Id: I0298cd3b4a6ff6618821e34642a5ddd6728be767 Reviewed-by: Alex Richardson Reviewed-by: Thiago Macieira --- src/corelib/text/qbytearray.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/corelib/text/qbytearray.h') diff --git a/src/corelib/text/qbytearray.h b/src/corelib/text/qbytearray.h index 7c571706d8..5d8ccbfb1a 100644 --- a/src/corelib/text/qbytearray.h +++ b/src/corelib/text/qbytearray.h @@ -254,7 +254,7 @@ public: void chop(int n); #if defined(Q_COMPILER_REF_QUALIFIERS) && !defined(QT_COMPILING_QSTRING_COMPAT_CPP) && !defined(Q_CLANG_QDOC) -# if defined(Q_CC_GNU) && !defined(Q_CC_CLANG) && !defined(Q_CC_INTEL) && !QT_HAS_CPP_ATTRIBUTE(nodiscard) +# if defined(Q_CC_GNU) && !defined(Q_CC_CLANG) && !defined(Q_CC_INTEL) && !__has_cpp_attribute(nodiscard) // required due to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61941 # pragma push_macro("Q_REQUIRED_RESULT") # undef Q_REQUIRED_RESULT -- cgit v1.2.3