I use -Wall and updating to new gcc I have got a lot of warning: narrowing conversion. I want to disable them, but leave all other warnings untouched (ideally). I can find nothing about narrowing ...

I'm recompiling some executable for Android 5.0 as it requires executables to be PIE. I was able to recompile it for ARM with just adding some arguments while configuring (with standalone toolchain...

In theory, I should be able to use a custom pointer type and deleter in order to have unique_ptr manage an object that is not a pointer. I tried the following code: #ifndef UNIQUE_FD_H #define UNI...

In boost::interprocess documentation it is said as requirement for containers to be stored in shared memory: STL containers may not assume that memory allocated with an allocator can be deallocat...

Consider this function compiling with g++ -std=c++11 (GCC 4.7.2): boost::uuids::uuid getID() { static boost::uuids::random_generator generator; return generator(); } Is it safe to call getID f...

I am trying to compile a program using a self-compiled GCC-4.7.1 on Mac OS 10.8.2. The program uses openMP and the compilation succeeds; however, when I try to run the program, the dynamic linker c...

I've been developing with CentOS, Qt 4.7, and GCC 4.4 I've just installed Red Hat Developer Toolset 1.1 which includes GCC 4.7.2, and at the end of make, I get an error /usr/bin/ld: ../../bin/So...

What are the features that I can use in c++ freestanding environment? I am developing a little kernel (for my own pleasure) and I know that I can't use the whole stdlib library, but what else ? whe...

I am getting this error every time, while compiling programs, configuring and installing some things like binutils, textinfo, etc.: /usr/local/bin/ld: this linker was not configured to use sysroots...

The gcc info file says in the section on x86-64 specific flags, among other things: There is no `-march=generic' option because `-march' indicates the instruction set the compiler can use, and ther...

While testing some functionality with std::thread, a friend encountered a problem with GCC and we thought it's worth asking if this is a GCC bug or perhaps there's something wrong with this code (t...

Here is a piece of code that I've been trying to compile: #include <cstdio> #define N 3 struct Data { int A[N][N]; int B[N]; }; int foo(int uloc, const int A[N][N], const int B[N]) { ...

I'm trying to, at compile time, select a type to use depending on whether one is publicly available in a given scope. It's best to go straight to the code: #include <iostream> #include <t...

I recently installed GCC 4.7.3 and GDB 7.6 on my OS X 10.7 system via MacPorts to be able to compile C++11 code. I cannot use Apple's selfmade clang++ and gdb since it doesn't allow me to debug sta...

I am porting existing code to compile under gcc 4.7.2 and have run into a strange issue with nullptr. I have managed to boil it down to a simple test case: #include <stdio.h> const char* g_...

The title says it all. I'm using GCC 4.7.1 (bundled with CodeBlocks) and I faced a strange issue. Consider this: int main() { unsigned char a = 0, b = 0, c = 0; scanf("%hhu", &a); printf("a...

So accurate timing is important to me, and I was investigating the 3 types of clocks specified in C++ 11, namely system_clock, steady_clock, and high_resolution_clock. My initial concern was testi...

I am trying to compile my project where I've declared as class members some: icu::UnicodeString label; icu::UnicodeString tags; icu::UnicodeString domain; icu::UnicodeString data; After having i...

I'm having trouble using map::emplace(). Can anyone help me figure out the right syntax to use? I am effectively trying to do the same thing as in this example. Here is my version: #include <ma...

I'm trying to compile GCC 4.7.2 on a Buffalo LinkStation Pro Duo (after unlocking it) which runs Linux 2.6.31.8 armv5tel. Unfortunately, make throws quite some errors, starting with gcc -c -DIN_G...

The code below compiles fine with clang, but does not compile with GCC (tried 4.1.2, 4.5.4 and 4.7.2): template <typename T> struct A { struct B { }; }; template <typename T> bool op...

Here's code that produces different output in g++ 4.7 and vs2012 (cl17). #include <iostream> using namespace std; class A { public: A() { cout << "1" << endl; } ~A() { cout &...

I've been playing with user defined constants in gcc 4.7.2 and ran into some sort of size limiting factors which I do not quite understand. The idea was to define a constexpr operator "" for fixed...

When I try to use std::distance with a custom iterator under gcc 4.7, it complains about not finding the difference_type. I have sadly no idea why it fails. #include <iterator> class nit { ...

Here's what I am trying. MinGW g++ 4.7.0. #include <iostream> #include <string> class Fruit { public: enum Value { APPLE, ORANGE, BANANA, NONE }; static const Value VALUES[4] = { AP...