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I allready build clang(3.2) with MSVC and MinGW succesfully. But I think it's not the "purely" clang. So could someone give me some instructions or materials about how to use clang to build clang(Windows/Linux)? And could we use clang indepently(Not depent on GCC or MSVC). Thanks all!
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On the other hand, Clang/LLVM is natively a cross-compiler, meaning that one set of programs can compile to all targets by setting the -target option.
2.4. To compile a C++ program on the command line, run the clang++ compiler as follows: $ scl enable llvm-toolset-6.0 'clang++ -o output_file source_file ...' This creates a binary file named output_file in the current working directory. If the -o option is omitted, the clang++ compiler creates a file named a.
GCC supports languages that clang does not aim to, such as Java, Ada, FORTRAN, etc. GCC front-ends are very mature and already support C++. clang's support for C++ is nowhere near what GCC supports.
Well get an older version of clang like 3.1. (You can pretty much install any version that comes precompiled for your OS)
Get the sources for a newer version like 3.2.
Then (i like cmake+ninja ( http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html))
if you unpacked llvm source to ~/llvm_source/llvm
cd ~/llvm_source
mkdir build
cd build
CXX=clang++ CC=clang cmake -G Ninja ../llvm -DCMAKE_BUILD_TYPE=Release
ninja
If you want it for make
CXX=clang++ CC=clang cmake ../llvm -DCMAKE_BUILD_TYPE=Release
make
Thats it.
Have fun.
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The current method (as of 27th Feb 17') seems to be as follows,
cmake -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ $LLVM_SRC_DIR # -G Ninja
Where CMAKE_C_COMPILER and CMAKE_CXX_COMPILER are CMake variables define by -D. Somehow, these variables don't appear in llvm_src/CMakeLists.txt
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