[cfe-dev] Running clang programmatically

[Stefan Seefeld]

Hello,

I have some trouble invoking clang_createTranslationUnitFromSourceFile. 
Here is the sequence of functions I use. (Note that I assembled that 
from various comments in the code, and may likely have missed some 
important bits):


   // excludeDeclsFromPCH = 1, displayDiagnostics=1
   CXIndex idx = clang_createIndex(1, 1);

   char const *args[] = { "-Xclang"};
   CXTranslationUnit TU = clang_createTranslationUnitFromSourceFile(idx, 
input_file,
                                    1, args, 0, 0);
   clang_visitChildren(clang_getTranslationUnitCursor(TU), translate, 0);
   clang_disposeTranslationUnit(TU);
   clang_disposeIndex(idx);

This results in an error output, plus a subsequent segfault:

error: unable to handle compilation, expected exactly one compiler job 
in ' "/usr/local/bin/clang" "-cc1" "-triple" "x86_64-unknown-linux-gnu" 
"-S" "-disable-free" "-main-file-name" "test.cc" "-mrelocation-model" 
"static" "-mdisable-fp-elim" "-mconstructor-aliases" "-munwind-tables" 
"-target-cpu" "x86-64" "-resource-dir" "/lib/clang/1.1" 
"-fmessage-length" "183" "-fexceptions" "-fgnu-runtime" 
"-fdiagnostics-show-option" "-fcolor-diagnostics" "-fsyntax-only" "-o" 
"/tmp/cc-GyUGlM.s" "-x" "c++" "/home/stefan/projects/Synopsis/test.cc";  
"/usr/bin/gcc" "-Xclang" "-fsyntax-only" "-c" "-m64" "-o" 
"/tmp/cc-fWJsot.o" "-x" "assembler" "/tmp/cc-GyUGlM.s";  "/usr/bin/gcc" 
"-Xclang" "-fsyntax-only" "-m64" "-o" "a.out" "/tmp/cc-fWJsot.o"; '


My questions:

1) Is the function call sequence above (approximately) correct ? (If 
not, what is wrong ?)
2) Where is the current error emitted, and how may I intercept it 
programmatically ?
3) What is the error trying to tell me ?


Thanks for helping me getting started with CLang !

     Stefan

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