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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hi,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I am using Mac OS X 10.7 with Apple clang version 3.1. At the moment our build fails due to an unknown compiler flag:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>error: unknown warning option '-Wstrict-null-sentinel' [-Werror,-Wunknown-warning-option]<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Although we are checking whether the flag is accepted by the selected compiler. When I use the following statement:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US> CHECK_CXX_ACCEPTS_FLAG(${_cxxflag} HAS_FLAG)<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> if(NOT HAS_FLAG)<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> message("Flag check failure ${_cxxflag}")<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> else()<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> message("Flag ${_cxxflag} accepted")<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US> endif()<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Cmake tells me that the '-Wstrict-null-sentinel' flag is accepted. Is this a bug in Cmake or am I doing something wrong?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I use Cmake 2.8.8<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks in advance!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Best regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Andreas<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>