[LLVMbugs] [Bug 10868] New: libclang does not respect line directives when reporting source locations

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=10868

           Summary: libclang does not respect line directives when
                    reporting source locations
           Product: clang
           Version: trunk
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: vinay_sajip at yahoo.co.uk
                CC: llvmbugs at cs.uiuc.edu


Given a simple file somefile.c with the contents

#123 "dummy.c" 1

static int func()
{
    return 0;
}

the source location of the func() definition is reported as line 3 of
somefile.c, whereas it should be line 124 of dummy.c as per the # directive.

The # line is correctly parsed in PPDirectives.cpp and a line note added, but
this is not available via the source location APIs.

This problem means that libclang's source location functionality is not much
use when processing files which have already been pre-processed, say via gcc
-E.

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