libstdc++

I downloaded and built gcc 4.8.1 on my desktop, running 64-bit Ubuntu 12.04. I built it out of source, like the docs recommend, and with the commands ../../gcc-4.8.1/configure --prefix=$HOME --program-suffix=-4.8 make make -k check make install It seemed to pass all the tests, and I installed everything into my home directory w/ the suffix -4.8 to distinguish from the system gcc, which is version 4.6.3. Unfortunately when I compile c++ programs using g++-4.8 it links to the system libc and libstdc++ rather than the newer ones compiled from gcc-4.8.1. I downloaded and built gcc 4.8 because I

Consider the following test program: #include <iostream> #include <string> #include <vector> int main() { std::cout << sizeof(std::string("hi")) << " "; std::string a[10]; std::cout << sizeof(a) << " "; std::vector<std::string> v(10); std::cout << sizeof(v) + sizeof(std::string) * v.capacity() << "\n"; } Output for libstdc++ and libc++ respectively are: 8 80 104 24 240 264 As you can see, libc++ takes 3 times as much memory for a simple program. How does the implementation differ that causes this memory disparity? Do I need to be concerned and how do I workaround it? Here is a short program to

I need to deploy a C++ application built on Ubuntu 12.10 with GCC 4.7's libstdc++ to systems running Ubuntu 10.04, which comes with a considerably older version of libstdc++. Currently, I'm compiling with -static-libstdc++ -static-libgcc , as suggested by this blog post: Linking libstdc++ statically . The author warns against using any dynamically-loaded C++ code when compiling libstdc++ statically, which is something I haven't yet checked. Still, everything seems to be going smoothly so far: I can make use of C++11 features on Ubuntu 10.04, which is what I was after. I note that this article

Unless I am mistaken, it should be possible to create a std:array in these ways: std::array<std::string, 2> strings = { "a", "b" }; std::array<std::string, 2> strings({ "a", "b" }); And yet, using GCC 4.6.1 I am unable to get any of these to work. The compiler simply says: expected primary-expression before ',' token and yet initialization lists work just fine with std::vector. So which is it? Am I mistaken to think std::array should accept initialization lists, or has the GNU Standard C++ Library team goofed? std::array is funny. It is defined basically like this: template<typename T, int

I need help. I had a framwork which was using stdc++ like std:string. Now when i have created new app for IOS7 only there is problem with linking this framework because of problems with stdc++ lib: Undefined symbols for architecture armv7 "std::basic_string, std::allocator >::_Rep::_S_empty_rep_storage", referenced from ... I have find out something strange that when i change the Deplyment target to ios6 in this app all is working fine. With ios7 i see errors. I already have flag set in other linker flags: -lstdc++ Any idea what ami doing wrong? Just an update on this answer: This step is very