It is equivalent to adding the statement #define LINUX 1 in the source code of the file that is being compiled. It does not have any effect on other compilation flags. The reason for this is it’s an easy way to enable #ifdef statements in the code. So you can have code that says: #ifdef … Read more
When using scanf() double should be read using %lf, not %f. %f will convert the input into a 32-bit float, so the first 32 bits of your variables will be filled with some invalid data, and the last 32 bits will be left as garbage. Yes. #include <limits>, then std::numeric_limits<double>::quiet_NaN(). Some compilers (e.g. gcc) also … Read more
The undefined reference error indicates that the definition of a function/method (i.e constructor here) was not found by the linker. StaticObject::StaticObject(Graphics*, sf::String, sf::Vector2<float>) And the reason that adding the following line: #include “GameObject/StaticObject.cpp” fixes the issue, is it brings in the implementation as part of the main.cpp whereas your actual implementation is in StaticObject.cpp. This … Read more
From the gnu cpp manual… __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__ These macros are defined by all GNU compilers that use the C preprocessor: C, C++, Objective-C and Fortran. Their values are the major version, minor version, and patch level of the compiler, as integer constants. For example, GCC 3.2.1 will define __GNUC__ to 3, __GNUC_MINOR__ to 2, … Read more
You need to use the -o option of g++ g++ -o output_file_name source.cpp
I found this to be the cleanest, using @UncleBens suggestion: #include <type_traits> static_assert(std::is_same<decltype(retval), bool>::value, “retval must be bool”);
I just add -mwindows to linker flags.
This command can help you brew install libomp brew info libomp libomp: stable 6.0.1 (bottled) LLVM’s OpenMP runtime library https://openmp.llvm.org/ /usr/local/Cellar/libomp/6.0.1 (12 files, 1.2MB) * Poured from bottle on 2018-11-20 at 16:12:22 From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/libomp.rb ==> Dependencies Build: cmake ✘ ==> Requirements Required: macOS >= 10.10 ✔ ==> Caveats On Apple Clang, you need to add … Read more
As far as I know, there is no compilation flag in GCC to disable the suggested candidates in case of ambiguous function calls. Your only hope is perhaps to patch the GCC source code. Digging in it (version: 4.7.1), I’ve found what appear to be the relevant function in gcc/cp/pt.c: void print_candidates(tree fns) { const … Read more
Got it! #define anlb /* */ A /* */ B anlb anlb gcc -E -CC nl.c /* */ A /* */ B /* */ A /* */ B