XCode 4.5 'tr1/type_traits' file not found
Solution 1
I'm guessing you have "C++ Standard Library" set to "libc++". If this is the case, you want <type_traits>
, not <tr1/type_traits>
. libc++ gives you a C++11 library, whereas libstdc++ (which is also the default in Xcode 4.5) gives you a C++03 library with tr1 support.
If you want, you can auto-detect which library you're using with:
#include <ciso646> // detect std::lib
#ifdef _LIBCPP_VERSION
// using libc++
#include <type_traits>
#else
// using libstdc++
#include <tr1/type_traits>
#endif
Or in your case perhaps:
#include <ciso646> // detect std::lib
#ifdef _LIBCPP_VERSION
// using libc++
#define HAVE_TYPE_TRAITS
#else
// using libstdc++
#define HAVE_TR1_TYPE_TRAITS
#endif
Solution 2
This is the command I used to build wxWidgets against libc++ (LLVM C++ Standard Library). Should work on Yosemite and later (at least until Apple breaks everything again):
mkdir build-cocoa-debug
cd build-cocoa-debug
../configure --enable-debug --with-macosx-version-min=10.10
make -j8 #This allows make to use 8 parallel jobs
Comments
-
Aranir almost 2 years
I use the wxwidget library and I have the following problem:
#if defined(HAVE_TYPE_TRAITS) #include <type_traits> #elif defined(HAVE_TR1_TYPE_TRAITS) #ifdef __VISUALC__ #include <type_traits> #else #include <tr1/type_traits> #endif #endif
here the #include isn't found. I use the Apple LLVM compiler 4.1. (with the c++11 dialect). If I switch to the LLVM GCC 4.2 compiler I have no error there, but the main problem is that all the c++11 inclusions won't work.
How can I either use the GCC compiler, but with the c++11 standard or make it that the LLVM can find the ?
any help would be really appreciated.