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Re: [Mingw-cross-env-list] Qt 4.7 (help wanted)

From: Mark Brand
Subject: Re: [Mingw-cross-env-list] Qt 4.7 (help wanted)
Date: Mon, 31 May 2010 23:17:06 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100527 SUSE/3.1rc1-3.1 Thunderbird/3.1

Here is the line:

QMAKE_CFLAGS = -pipe -isystem /usr/i686-pc-mingw32/include

I would like to avoid having to specify the full path this way. Does
anyone know of a way to put the intended directory in the include path
without resorting to this?
Since "/usr/i686-pc-mingw32/include" is already in our GCC's
system include path, I don't see a need for that option at all.

Without having tested, I'm pretty sure you can simplify the line to:

     QMAKE_CFLAGS = -pipe

That's what I thought too, but then this happens when building Qt:

make[2]: Entering directory `/home/brand/projects/mingw-cross-env.dev/qt47/tmp-qt/qt-everywhere-opensource-src-4.7.0-beta1/src/corelib' i686-pc-mingw32-g++ -c -include .pch/release-static/qt_pch.h -pipe -O2 -Wall -frtti -fexceptions -mthreads -DQT_THREAD_SUPPORT -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_BUILD_CORE_LIB -DQT_NO_USING_NAMESPACE -DQT_ASCII_CAST_WARNINGS -DQT3_SUPPORT -DQT_MOC_COMPAT -DQT_USE_FAST_OPERATOR_PLUS -DQT_USE_FAST_CONCATENATION -D_USE_MATH_DEFINES -DHB_EXPORT=Q_CORE_EXPORT -DQT_HAVE_MMX -DQT_HAVE_3DNOW -DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_NO_DEBUG -I'../../include' -I'../../include/QtCore' -I'.rcc/release-static' -I'tmp' -I'global' -I'../3rdparty/harfbuzz/src' -I'../3rdparty/md5' -I'../3rdparty/md4' -I'../../include/ActiveQt' -I'.moc/release-static' -I'../../mkspecs/win32-g++-cross' -o .obj/release-static/qlocale.o tools/qlocale.cpp tools/qlocale.cpp: In function 'char* qdtoa(double, int, int, int*, int*, char**, char**)': tools/qlocale.cpp:6589:14: error: '_clear87' was not declared in this scope tools/qlocale.cpp:6590:43: error: '_control87' was not declared in this scope
make[2]: *** [.obj/release-static/qlocale.o] Error 1

I'm not sure what's happening here, but it looks like the items in question are defined here:

usr/i686-pc-mingw32/include/float.h:108:#define _clear87 _clearfp usr/i686-pc-mingw32/include/float.h:103:_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _control87 (unsigned int unNew, unsigned int unMask);

Is the "#include <float.h>" in tools/qlocale.cpp picking up a different float.h?

This float.h seems to be in the way:



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