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Explicitly use libstdc++ for non-C++11 static builds 

Otherwise the compiler may choose libc++ based on the deployment target,
and we'll end up with broken builds due to the mismatch between the two
libraries, eg:

Undefined symbols for architecture x86_64:
  "std::ios_base::Init::Init()", referenced from:
      __GLOBAL__I_a in libQt5Qml.a(qv4object.o)
      ...
  "std::ios_base::Init::~Init()", referenced from:
      __GLOBAL__I_a in libQt5Qml.a(qv4object.o)
      ...
  "std::__throw_length_error(char const*)", referenced from:
      ...

This problem is not iOS specific, which is why the logic is moved
to the more generic mac/default_post.prf.

Change-Id: I28b94e614f9167fc0db84bbf1c88dd97d5629938
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
bb10
Tor Arne Vestbø 2014-01-27 17:27:36 +01:00 committed by The Qt Project
parent a4e0f4f80a
commit 4c980d2e9b
2 changed files with 9 additions and 9 deletions
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9
mkspecs/features/mac/default_post.prf
View File

@ -25,6 +25,15 @@ qt:!isEmpty(QT_CONFIG) {
warning("Qt was not built with C++11 enabled, disabling feature")
CONFIG -= c++11
}
!c++11 {
# Explicitly use libstdc++ if C++11 support is not enabled,
# as otherwise the compiler will choose the standard library
# based on the deployment target, which for iOS 7 and OS X 10.9
# is libc++, and we can't mix and match the two.
QMAKE_CXXFLAGS += -stdlib=libstdc++
QMAKE_LFLAGS += -stdlib=libstdc++
}
}
}

9
mkspecs/macx-ios-clang/features/default_post.prf
View File

@ -178,15 +178,6 @@ macx-xcode {
launch_images.files = $$copy_image.output
QMAKE_BUNDLE_DATA += launch_images
!contains(QT_CONFIG, c++11) {
# Explicitly use libstdc++ if C++11 support is not enabled,
# as otherwise Xcode will choose the compiler default based
# on the deployment target, which for iOS 7 is libc++. This
# breaks compilation since Qt was built against libstdc++.
QMAKE_CXXFLAGS += -stdlib=libstdc++
QMAKE_LFLAGS += -stdlib=libstdc++
}
# Make the default debug information format for debug builds
# DWARF instead of DWARF with dSYM. This cuts down build times
# for application debug builds significantly, as Xcode doesn't