diff options
| author | Tor Arne Vestbø <tor.arne.vestbo@qt.io> | 2019-12-08 23:47:10 +0100 |
|---|---|---|
| committer | Tor Arne Vestbø <tor.arne.vestbo@qt.io> | 2019-12-10 00:48:07 +0100 |
| commit | c3bd5ffdc8a3b459f18ba6e35fca93e29f3b0ab0 (patch) | |
| tree | 24d4c1350b6a08d35396377e83301bda3b4addb4 /src/corelib/global/qlogging.cpp | |
| parent | 191ac31598ccc9d7c8a2c83730755714f903b7ca (diff) | |
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 <arichardson.kde@gmail.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib/global/qlogging.cpp')
| -rw-r--r-- | src/corelib/global/qlogging.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/corelib/global/qlogging.cpp b/src/corelib/global/qlogging.cpp index 17f2246082..5a7f8242de 100644 --- a/src/corelib/global/qlogging.cpp +++ b/src/corelib/global/qlogging.cpp @@ -70,7 +70,7 @@ #if QT_CONFIG(slog2) #include <sys/slog2.h> #endif -#if QT_HAS_INCLUDE(<paths.h>) +#if __has_include(<paths.h>) #include <paths.h> #endif @@ -106,7 +106,7 @@ # if __UCLIBC_HAS_BACKTRACE__ # define QLOGGING_HAVE_BACKTRACE # endif -# elif (defined(__GLIBC__) && defined(__GLIBCXX__)) || (QT_HAS_INCLUDE(<cxxabi.h>) && QT_HAS_INCLUDE(<execinfo.h>)) +# elif (defined(__GLIBC__) && defined(__GLIBCXX__)) || (__has_include(<cxxabi.h>) && __has_include(<execinfo.h>)) # define QLOGGING_HAVE_BACKTRACE # endif #endif @@ -116,7 +116,7 @@ extern char *__progname; #endif #ifndef QT_BOOTSTRAPPED -#if defined(Q_OS_LINUX) && (defined(__GLIBC__) || QT_HAS_INCLUDE(<sys/syscall.h>)) +#if defined(Q_OS_LINUX) && (defined(__GLIBC__) || __has_include(<sys/syscall.h>)) # include <sys/syscall.h> # if defined(Q_OS_ANDROID) && !defined(SYS_gettid) @@ -1276,7 +1276,7 @@ void QMessagePattern::setPattern(const QString &pattern) #if defined(QLOGGING_HAVE_BACKTRACE) && !defined(QT_BOOTSTRAPPED) // make sure the function has "Message" in the name so the function is removed -#if ((defined(Q_CC_GNU) && defined(QT_COMPILER_SUPPORTS_SIMD_ALWAYS)) || QT_HAS_ATTRIBUTE(optimize)) \ +#if ((defined(Q_CC_GNU) && defined(QT_COMPILER_SUPPORTS_SIMD_ALWAYS)) || __has_attribute(optimize)) \ && !defined(Q_CC_INTEL) && !defined(Q_CC_CLANG) // force skipping the frame pointer, to save the backtrace() function some work __attribute__((optimize("omit-frame-pointer"))) |