diff options
| author | Thiago Macieira <thiago.macieira@intel.com> | 2017-03-04 09:33:35 -0800 |
|---|---|---|
| committer | Thiago Macieira <thiago.macieira@intel.com> | 2017-03-31 21:08:32 +0000 |
| commit | a03390a8b0318e30ae3b6dc9954093c137a20c32 (patch) | |
| tree | df22fd510d9d6b8889e7cc531beb20f6b75b61aa /mkspecs/features/default_post.prf | |
| parent | 62013d77721820976102581b4cbd31404c109903 (diff) | |
Detect the (stated) C++ standard edition at build time
The configure-time detection (cxx11default) isn't enough if the compiler
can be changed. This is especially necessary if Qt is compiled with a
compiler that defaults to >= C++11 (e.g., GCC 6) and then the user
selects a compiler another compiler (e.g., Clang) via -spec option. In
that case, we'd miss adding the -std=c++11 or -std=gnu++11 option to the
command-line, causing the compilation to fail.
As a nice side-effect, even moc without moc_predefs.h will now get the
__cplusplus setting.
Task-number: QTBUG-58321
Change-Id: I74966ed02f674a7295f8fffd14a8be35da9640e1
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Diffstat (limited to 'mkspecs/features/default_post.prf')
| -rw-r--r-- | mkspecs/features/default_post.prf | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mkspecs/features/default_post.prf b/mkspecs/features/default_post.prf index 60759b445e..359191c2d3 100644 --- a/mkspecs/features/default_post.prf +++ b/mkspecs/features/default_post.prf @@ -95,6 +95,11 @@ breakpad { !isEmpty(QMAKE_STRIP):QMAKE_POST_LINK = $$QMAKE_POST_LINK$$escape_expand(\\n\\t)$$quote($$QMAKE_STRIP $$DEBUGFILENAME) } +!c++11:!c++14:!c++1z { + # Qt requires C++11 since 5.7, check if we need to force a compiler option + QT_COMPILER_STDCXX_no_L = $$replace(QT_COMPILER_STDCXX, "L$", "") + !greaterThan(QT_COMPILER_STDCXX_no_L, 199711): CONFIG += c++11 +} c++11|c++14|c++1z { # Disable special compiler flags for host builds !host_build|!cross_compile { |