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Questions tagged [llvm-clang]

Clang is the C language family front-end for the LLVM compiler. (The C language family includes C, C++, Objective-C, and Objective-C++.)

Clang refers to the C language family front-end for the LLVM (originally known as "low level virtual machine") compiler. The C language family consists of C, C++, Objective-C, and Objective-C++.

High-level features of clang include better compile-time performance than gcc, helpful error and warning messages, and a static analyzer to automatically detect software bugs.

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Clang doesn't see basic headers

I've tried to compile simple hello world on Fedora 20 with Clang, and I get the following output: d.cpp:1:10: fatal error: 'iostream' file not found #include I don't have any idea how to resolve it.
sweet_sugar
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tgmath.h doesn't work if modules are enabled

I looked into using tgmath.h to deal with the CGFloat typedef float/double mess when dealing with arm64. This answer has a pretty good description of how to use it, except that it didn't work at all for me. No matter what, my code was still calling…
Dima
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How do I specify a clang-format file?

I just built clang 5.0.0 on a Redhat 6 machine and tried to run clang-format. I'm unable to get the -style option to read in a style file. Here's an example of a set of commands that I think should work: ./clang-format -style=llvm -dump-config >…
dromodel
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What do you need to install to use Clang on windows to build c++14 for 64 bit?

UPDATE: I've written a detailed tutorial that incorporates the top two answers on this question: http://blog.johannesmp.com/2015/09/01/installing-clang-on-windows-pt1/ TL;DR On Windows, Given the following program: #include int…
Johannes
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clang: no out-of-line virtual method definitions (pure abstract C++ class)

I'm trying to compile the following simple C++ code using Clang-3.5: test.h: class A { public: A(); virtual ~A() = 0; }; test.cc: #include "test.h" A::A() {;} A::~A() {;} The command that I use for compiling this (Linux, uname -r:…
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Clang C++ Cross Compiler - Generating Windows Executable from Mac OS X

I have created a C++ application using Xcode on my Mac using the Clang compiler. I want to compile my source files to create an executable that can be ran on a windows machine however I cant get Clang to generate me an executable. Here is what I've…
gavlaaaaaaaa
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clang-format: How to keep each element of constructor's initializer list on a separate line

I have a C++ class like this: class A { public: A() : m_a(someValue1), m_b(someValue2), m_c(someValue3) { } // .... other class members private: A m_a; B m_b; C m_c; }; After formatting this…
ivan.ukr
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Bind mutex to object

Given the following example code: int var; int mvar; std::mutex mvar_mutex; void f(){ mvar_mutex.lock(); mvar = var * var; mvar_mutex.unlock(); } I want to express that mvar_mutex is bound to the variable mvar and protects only that…
nwp
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What standard C library does Clang use? glibc, its own, or some other one?

I'm pretty sure glibc is the name of the standard C library implementation for gcc. But for LLVM/Clang I'm not sure. I've Googled to try to find if it comes with its own implementation of the whole standard C library, or whether they also use glibc.…
hippietrail
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Private module map for a framework

I'm using this answer to create a module map to create a module for CommonCrypto so I can use it in a framework. Doing this however means that any projects that I use this framework in have access to CommonCrypto with import CommonCrypto - and even…
Rich
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std::variant<>::get() does not compile with Apple LLVM 10.0

I'm playing with the C++17 std::variant type and tried to compile the cppreference example code for get(): #include #include int main() { std::variant v{12}, w; int i = std::get(v); w =…
Mike Lischke
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Why doesn't Clang come with standard library headers?

I downloaded Clang 3.6.2 from this website and am trying to set it up with Code::Blocks under Windows. Unfortunately, it fails to compile a simple "hello world" program on the grounds that it doesn't know where iostream is. Looking through the…
Therhang
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What effect does #define X X have in C?

In the source code of stdbool.h in LLVM project, it reads: /* Don't define bool, true, and false in C++, except as a GNU extension. */ #ifndef __cplusplus #define bool _Bool #define true 1 #define false 0 #elif defined(__GNUC__) &&…
Mohsen Nosratinia
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Clang-Tidy llvm-header-guard directory configuration

Is there a way to remove the suggested computer specific path on the suggested llvm-header-guard string when running static analysis with clang-tidy? For example the suggested header guard for the file (cls/math/matrix.hpp) is: …
user7119460
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Pasting formed an invalid processing token '.'

I am trying to use macro for calling appropriate object based on the type. #define DELEGATE_FUNC(FuncName, kind, paramPtr) \ if (kind == 1) { \ return PolicyObject1.##FuncName(paramPtr); \ …
Nitesh
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