What legitimate reasons are there for -I over -iquote? -I is standardized (at least by POSIX) while -iquote isn’t. (Practically, I’m using -I because tinycc (one of the compilers I want my project to compile with) doesn’t support -iquote.) How do projects manage with -I given the dangers? You’d have the includes wrapped in a … Read more
The warning doesn’t state that it’s UB; it merely says that the context of use, namely sizeof, won’t trigger the side effects (which in case of new is allocating memory). [expr.sizeof] The sizeof operator yields the number of bytes occupied by a non-potentially-overlapping object of the type of its operand. The operand is either an … Read more
Here is a simpler case that triggers the same warning: class A { public: // … A(); }; A my_A; // triggers said warning test.cpp:7:3: warning: declaration requires a global constructor [-Wglobal-constructors] A my_A; // triggers said warning ^~~~ 1 warning generated. This is perfectly legal and safe C++. However for every non-trivial global constructor … Read more
The gcc command in the latest Xcode suite is no longer the GCC frontend to LLVM (based on the very old GCC 4.2.1) but rather a symlink to clang. Clang does not (yet) support OpenMP. You have to install separately another version of GCC, e.g. by following this tutorial or by using any of the … Read more
Turns out the correct answer is -Wno-error=unused-command-line-argument.
I believe Clang is correct to produce this error: The [temp.inst] section of the C++ standard in paragraph 10 says: If a function template or a member function template specialization is used in a way that involves overload resolution, a declaration of the specialization is implicitly instantiated (14.8.3). Forming the implicit conversion sequence necessary to … Read more
According to overload resolution, there are two viable functions: The specialization of the global operator|-template with deduced arguments and the specialization of the member operator function template. Both have the same signature – the member function template has an implicit object parameter of type Alice const& (see ยง13.3.1/4). So both viable functions (after template argument … Read more
In newer version of clang-format, this can now be achieved with: AlignAfterOpenBracket: AlwaysBreak BinPackArguments: false BinPackParameters: false See https://clang.llvm.org/docs/ClangFormatStyleOptions.html for a full explanation of these options.
I think the problem is that Asan and Msan both want to control the heap, and both want to reserve a large amount of memory to use as “shadow memory” which tracks the allocations and usage of the memory your program uses. They can’t both be active because they would be trying to track the … Read more
With the latest (appstore) XCode 4.3.2, the location changed, it can now be found in /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/libclang.dylib The /Developer directory, among others, no longer exists by default. Everything is now packaged inside the XCode application, so that delta updates from the appstore work.