问题描述
不是着色器凉爽吗？你可以折腾一个纯字符串，只要它是有效的源，它会编译，链接和执行。我想知道是否有一种方法来嵌入GCC内部用户应用程序，以便它是自足，例如。具有内部能力来编译与自身兼容的本地二进制文件。
Aren't shaders cool? You can toss in just a plain string and as long as it is valid source, it will compile, link and execute. I was wondering if there is a way to embed GCC inside a user application so that it is "self sufficient" e.g. has the internal capability to compile native binaries compatible to itself.
到目前为止，我一直在调用一个进程的独立GCC，在应用程序中启动，但我想知道如果有一些API或某事可以允许使用直接，而不是一个独立的编译器。
So far I've been invoking stand alone GCC from a process, started inside the application, but I was wondering if there is some API or something that could allow to use "directly" rather than a standalone compiler. Also, in the case it is possible, is it permitted?
编辑：虽然最初的问题是关于CGG，我会解决如何嵌入LLVM / Clang的信息
Although the original question was about CGG, I'd settle for information how to embed LLVM/Clang too.
现在对于无法将2 + 2放在一起的人来说是一个特殊的编辑：这个问题询问如何将GCC或Clang嵌入可执行文件中允许从代码使用内部API，而不是从命令提示符调用编译。
And now a special edit for people who cannot put 2 + 2 together: The question asks about how to embed GCC or Clang inside of an executable in a way that allows an internal API to be used from code rather than invoking compilation from a command prompt.
推荐答案
我会为使用Clang / LLVM而不是GCC的建议添加+1。有几个好的理由：
I'd add +1 to the suggestion to use Clang/LLVM instead of GCC. A few good reasons why:
- 它更加模块化和灵活
- 编译时间可以低于GCC
- 它支持您在评论中列出的平台
- 它具有可在内部使用的API
- it is more modular and flexible
- compilation time can be substantially lower than GCC
- it supports the platforms you listed in the comments
- it has an API that can be used internally
string source = "app.c";
string target= "app";
llvm::sys::Path clangPath = llvm::sys::Program::FindProgramByName("clang");
// arguments
vector<const char *> args;
args.push_back(clangPath.c_str());
args.push_back(source.c_str());
args.push_back("-l");
args.push_back("curl");
clang::TextDiagnosticPrinter *DiagClient = new clang::TextDiagnosticPrinter(llvm::errs(), clang::DiagnosticOptions());
clang::IntrusiveRefCntPtr<clang::DiagnosticIDs> DiagID(new clang::DiagnosticIDs());
clang::DiagnosticsEngine Diags(DiagID, DiagClient);
clang::driver::Driver TheDriver(args[0], llvm::sys::getDefaultTargetTriple(), target, true, Diags);
clang::OwningPtr<clang::driver::Compilation> c(TheDriver.BuildCompilation(args));
int res = 0;
const clang::driver::Command *FailingCommand = 0;
if (c) res = TheDriver.ExecuteCompilation(*c, FailingCommand);
if (res < 0) TheDriver.generateCompilationDiagnostics(*c, FailingCommand);
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