如何构建clang+；具有非系统gcc的LLVM

我正在尝试切换到

/usr/local/bin/gcc

中的gcc47+设置。默认系统gcc是

/usr/bin/gcc

中的4.4.6

类似的头文件：

/usr/include/c++/4.4.4/bits/stl\u pair.h
/usr/local/include/c++/4.7.1/bits/stl_pair.h

locate exception_ptr.h
/usr/include/c++/4.4.4/exception_ptr.h
/usr/local/include/c++/4.7.1/bits/exception_ptr.h

我试图用

cd/apps/llvmbuild构建llvm-clang/apps/llvm/configure--prefix=/apps/llvmbuild--enable-optimized--enable-cxx11--enable docs=no--enable targets=host only--disable断言CPPFLAGS=-I/usr/local/include/cxflags=-I/usr/local/include/

然后

cd/apps/llvmbuild；make-j12 ENABLE_OPTIMIZED=1 DISABLE_ASSERTIONS=1

<>但是我发现了错误，显示它正在搜索4.4.6目录中的C++文件：

/usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../../../include/c++/4.4.6/exception_ptr.h

locate exception_ptr.h
/usr/include/c++/4.4.4/exception_ptr.h
/usr/local/include/c++/4.7.1/bits/exception_ptr.h

---

使用CC和CXX环境变量。 有关信息，请参见

configure--help

：

Some influential environment variables:
  CC          C compiler command
  ...
  CXX         C++ compiler command

Use these variables to override the choices made by `configure' or to help
it to find libraries and programs with nonstandard names/locations.

大概是这样的：

CXX=/usr/local/bin/g++ CC=/usr/local/bin/gcc /apps/llvm/configure --your --other --options