Clang (https://clang.llvm.org/) can pretty-print AST of instantiated template: For your example: test.cpp template < class T> T add(T a, T b){ return a+b; } void tmp() { add<int>(10,2); } Command to pretty-print AST: $ clang++ -Xclang -ast-print -fsyntax-only test.cpp Clang-5.0/Clang 14.0 output: template <class T> T add(T a, T b) { return a + b; … Read more
Depending on your build system it’s either in your qmake project file(.pro, standard for new projects) or in one of the CMake files (CMakeLists.txt, used by KDE and several other projects). Using .pro: QMAKE_CXXFLAGS += -O2 Using CMake: set( CMAKE_CXX_FLAGS “-g -Wall”)
Because This Question was marked as Duplicate, even if doesn’t have to do with it, because there is about Linker Flag and here is about Compiler Flags, I will post My answer HERE. You will have to go to Settings -> Compiler… and next you’ll have to click on Linker Settings TAB. On the right … Read more
In the early days of gcc (2.8 etc.) and in the times of egcs, and redhat 2.96 -O3 was quite buggy sometimes. But this is over a decade ago, and -O3 is not much different than other levels of optimizations (in buggyness). It does however tend to reveal cases where people rely on undefined behavior, … Read more
By compiler: GCC: -Wa,-mbranches-within-32B-boundaries clang (10+): -mbranches-within-32B-boundaries compiler option directly, not -Wa. MSVC: /QIntel-jcc-erratum See Intel JCC Erratum – what is the effect of prefixes used for mitigation? ICC: TODO, look for docs. The GNU toolchain does mitigation in the assembler, with as -mbranches-within-32B-boundaries, which enables (GAS manual: x86 options): -malign-branch-boundary=32 (care about 32-byte boundaries). … Read more
You can select the options for the GPU Code Generation in this dialog: In this case “compute_20” means that i am compiling for the virtual compute architecture 2.0 – virtual architecture influences the PTX generation stage. The second part that comes after the coma is “sm_21”.This influences the CUBIN generation stage. It defines the real … Read more
The -Wno-unused-variable switch usually does the trick. However, that is a very useful warning indeed if you care about these things in your project. It becomes annoying when GCC starts to warn you about things not in your code though. I would recommend you keeping the warning on, but use -isystem instead of -I for … Read more
Here are mine: -Wextra, -Wall: essential. -Wfloat-equal: useful because usually testing floating-point numbers for equality is bad. -Wundef: warn if an uninitialized identifier is evaluated in an #if directive. -Wshadow: warn whenever a local variable shadows another local variable, parameter or global variable or whenever a built-in function is shadowed. -Wpointer-arith: warn if anything depends … Read more
I use it all the time in my coding. The -ansi flag is equivalent to -std=c89. As noted, it turns off some extensions of GCC. Adding -pedantic turns off more extensions and generates more warnings. For example, if you have a string literal longer than 509 characters, then -pedantic warns about that because it exceeds … Read more
Yes. From documentation v4.1.2 From documentation latest always_inline Generally, functions are not inlined unless optimization is specified. For functions declared inline, this attribute inlines the function even if no optimization level was specified.