[LLVMbugs] [Bug 6924] New: llvm-config --cflags and --includedir broken

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=6924

           Summary: llvm-config --cflags and --includedir broken
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: edwintorok at gmail.com
                CC: llvmbugs at cs.uiuc.edu


--includedir only outputs the include dir for the sources:
/home/edwin/llvm-git/obj/../llvm/include

--cflags outputs both, but it also outputs a bunch of unneeded stuff (like -O2,
which can override an -O3 in another app, or _DEBUG which is not needed when
someone only uses the C bindings, etc.):
-I/home/edwin/llvm-git/obj/../llvm/include -I/home/edwin/llvm-git/obj/include 
-D_DEBUG -D_GNU_SOURCE -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -O2
-fomit-frame-pointer -fPIC

Same for cppflags it outputs _DEBUG:
-I/home/edwin/llvm-git/obj/../llvm/include -I/home/edwin/llvm-git/obj/include 
-D_DEBUG -D_GNU_SOURCE -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS

So right now I had to hardcode the path to LLVM in mesa's llvmpipe to get it to
build (I didn't install LLVM as mesa expects).

llvm-config should be fixed to not output useless/bad flags, and only output
the strictly needed flags.

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