$find . -name ext_qt-build-err.log -exec  awk '{print $NF}' {} + | grep -H "\-W" | sort | uniq -c
 112 (standard input):[-Wdeprecated-declarations]
   2 (standard input):[-Wdynamic-class-memaccess]
   2 (standard input):[-Wmismatched-new-delete]
   4 (standard input):[-Wmismatched-tags]
   2 (standard input):[-Wmissing-field-initializers]
   2 (standard input):[-Wnonnull]
   1 (standard input):[-Wreturn-stack-address]
 536 (standard input):[-Wtautological-constant-out-of-range-compare]
  40 (standard input):[-Wundefined-bool-conversion]
   4 (standard input):[-Wunused-const-variable]
   8 (standard input):[-Wunused-function]
  92 (standard input):[-Wunused-parameter]
   2 (standard input):[-Wunused-private-field]

$ cat ext_qt-build-err.log| awk -F: '/\[-W/ {print $1}' | sort | uniq -c
   2 ../../../3rdparty/libjpeg/jccoefct.c
   2 ../../../3rdparty/libjpeg/jccolor.c
   2 ../../../3rdparty/libjpeg/jcsample.c
   2 ../../../3rdparty/libjpeg/jctrans.c
   2 ../../../3rdparty/libjpeg/jdatadst.c
   4 ../../../3rdparty/libjpeg/jdatasrc.c
   2 ../../../3rdparty/libjpeg/jdcoefct.c
   2 ../../../3rdparty/libjpeg/jdcolor.c
   6 ../../../3rdparty/libjpeg/jdmerge.c
  10 ../../../3rdparty/libjpeg/jdpostct.c
  16 ../../../3rdparty/libjpeg/jdsample.c
  26 ../../../3rdparty/libjpeg/jmemnobs.c
  12 ../../../3rdparty/libjpeg/jquant1.c
   4 ../../../3rdparty/libjpeg/jquant2.c
   2 ../../../3rdparty/sqlite/sqlite3.c
   2 ../../include/QtCore/../../src/corelib/tools/qvector.h
   4 ../3rdparty/javascriptcore/JavaScriptCore/API/OpaqueJSString.cpp
  36 ../3rdparty/javascriptcore/JavaScriptCore/API/OpaqueJSString.h
 535 ../3rdparty/javascriptcore/JavaScriptCore/runtime/UStringImpl.h
   6 ../3rdparty/javascriptcore/JavaScriptCore/wtf/TCSystemAlloc.cpp
   1 .moc/debug/../../animations/pieanimation_p.h
   8 .moc/debug/moc_qserialport.cpp
   1 .moc/release/../../animations/pieanimation_p.h
   8 .moc/release/moc_qserialport.cpp
   1 /Volumes/Vishnu/Shakti/b/ext_qt/ext_qt-prefix/src/ext_qt/qtbase/include/QtCore/../../src/corelib/tools/qmap.h
   4 debugging/qscriptdebuggerlocalswidget.cpp
  14 fontdatabases/mac/qcoretextfontdatabase.mm
   2 inapppurchase/qinappproduct.cpp
   2 inapppurchase/qinapptransaction.cpp
   2 layout/polarchartlayout.cpp
   2 linechart/linechartitem.cpp
   4 qcocoahelpers.mm
   4 qcocoamenuloader.mm
  32 qcocoaprintdevice.mm
   2 qcorewlanengine.mm
   4 qhelpsearchindexwriter_clucene.cpp
   2 qiiofhelpers.cpp
  18 qserialportinfo_osx.cpp
   2 shared/layout.cpp
   2 shared/qlayout_widget.cpp
  14 ssl/qsslsocket_mac.cpp
   1 warning