Error 127 means one of two things: file not found: the path you’re using is incorrect. double check that the program is actually in your $PATH, or in this case, the relative path is correct — remember that the current working directory for a random terminal might not be the same for the IDE you’re … Read more
I’m not sure what the correct warning is, but once you’ve found it, you can change its disposition with the following (using ‘format’ as the example): #pragma GCC diagnostic error “-Wformat” Or as strager points out: gcc -Werror=format … I’ve checked the gcc source for this and this specific warning cannot be disabled via command … Read more
In your Dockerfile: FROM ubuntu # … ENV DEBIAN_FRONTEND noninteractive RUN apt-get update && \ apt-get -y install gcc mono-mcs && \ rm -rf /var/lib/apt/lists/*
GCC 4.8 introduces a new optimization level: -Og for the best of both worlds. -Og Optimize debugging experience. -Og enables optimizations that do not interfere with debugging. It should be the optimization level of choice for the standard edit-compile-debug cycle, offering a reasonable level of optimization while maintaining fast compilation and a good debugging experience. … Read more
See this answer. Is this even the correct approach here No: you can’t use mismatched versions of glibc as your link command does. You used crt0.o and ld-linux.so from new (system-installed) libc, but libc.so.6 from an old (copied from cluster) libc. That is just not going to work.
Ad 1. Those types are designed to work with numbers with huge dynamic range. The long double is implemented in a native way in the x87 FPU. The 128b double I suspect would be implemented in software mode on modern x86s, as there’s no hardware to do the computations in hardware. The funny thing is … Read more
CMake generates files for other build systems. These can be Makefiles, Ninja files or projects files for IDEs like Visual Studio or Eclipse. The build files contain calls to compilers like GCC, Clang, or cl.exe. If you have several compilers installed, you can choose one. All three parts are independent. The compiler, the build system … Read more
Gcc 4.9 seems to have added this feature via the -fdiagnostics-color flag:
You probably want #error: $ cd /tmp $ g++ -Wall -DGoOn -o stopthis stopthis.cpp $ ./stopthis Hello, world $ g++ -Wall -o stopthis stopthis.cpp stopthis.cpp:7:6: error: #error I had enough File stopthis.cpp #include <iostream> int main(void) { std::cout << “Hello, world\n”; #ifndef GoOn #error I had enough #endif return 0; }
With gcc, you need to compile and link with -fopenmp to enable OpenMP. Other compilers have different options; with intel it’s -openmp, with pgi it’s -mp, etc.