Hi Li Qingan,> Thanks for your last reply. > I have made a critical mistake when I stated my question in last email. > I built llvm in debug mode, but the NDEBUG seemed to be still defined, such that > the -debug option is not enabled. > I have restated my configuration below.you need to configure with --enable-assertions In spite of the name, NDEBUG is not related to optimization or debugging symbols, it means that checking (aka assertions) are disabled. Probably it should be renamed to NASSERT Ciao, Duncan.> Looking forwards to your reply. > > > > > > Hi Li Qingan, > >> I have built and installed llvm-2.8 in debug mode using: >> >> >SRC_DIR/configure --prefix=INS_DIR --enable-debug-runtime --disable-optimized >> --enable-debug-symbols >> >> >make install >> >> >> It seems theNDEBUGcontrols a lot of print-out of debug information, by using >> DEBUG() or dbgs(). >> >> And it is said thatNDEBUGis in enabled in debug mode, but I find it does not >> work and the -debug option is not recognized. How should I enableNDEBUGor >> enable DEBUG() and dbgs()? Should I defineNDEBUGin the .cpp files related, >> when I need the debug information? > > actually it is the opposite:NDEBUGis enabled when not in debug mode. The "N" in > NDEBUGstands for "Not". > > Ciao, Duncan. > -- > Best regards, > > Li Qingan >
On Jan 10, 2011, at 9:29 AMPST, Duncan Sands wrote:> Hi Li Qingan, > >> Thanks for your last reply. >> I have made a critical mistake when I stated my question in last email. >> I built llvm in debug mode, but the NDEBUG seemed to be still defined, such that >> the -debug option is not enabled. >> I have restated my configuration below. > > you need to configure with --enable-assertions > In spite of the name, NDEBUG is not related to optimization or debugging > symbols, it means that checking (aka assertions) are disabled. Probably > it should be renamed to NASSERTUse of the name NDEBUG to control assertions comes from the C++ (and C) standards. I agree this was not a great choice but deviating from the standard would be more confusing than helpful IMO.> Ciao, Duncan. > >> Looking forwards to your reply. >> >> >> >> >> >> Hi Li Qingan, >> >>> I have built and installed llvm-2.8 in debug mode using: >>> >>>> SRC_DIR/configure --prefix=INS_DIR --enable-debug-runtime --disable-optimized >>> --enable-debug-symbols >>> >>>> make install >>> >>> >>> It seems theNDEBUGcontrols a lot of print-out of debug information, by using >>> DEBUG() or dbgs(). >>> >>> And it is said thatNDEBUGis in enabled in debug mode, but I find it does not >>> work and the -debug option is not recognized. How should I enableNDEBUGor >>> enable DEBUG() and dbgs()? Should I defineNDEBUGin the .cpp files related, >>> when I need the debug information? >> >> actually it is the opposite:NDEBUGis enabled when not in debug mode. The "N" in >> NDEBUGstands for "Not". >> >> Ciao, Duncan. >> -- >> Best regards, >> >> Li Qingan >> > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu llvm.cs.uiuc.edu > lists.cs.uiuc.edu/mailman/listinfo/llvmdev-------------- next part -------------- An HTML attachment was scrubbed... URL: <lists.llvm.org/pipermail/llvm-dev/attachments/20110110/097328b0/attachment.html>