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Date: Fri, 26 Mar 2010 09:02:04 -0400
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Subject: trying to run 1.7 question on gtk_init or function ptr's
From: mike marchywka <marchywka AT gmail DOT com>
To: cygwin <cygwin AT cygwin DOT com>
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In the last episode of this saga, I was trying to build
QtWebkit without using the cygwin package and using
1.5. Having been illuminated about how stupid this was,
I installed 1.7 and 1.7 and 1.5  do seem to coexist.
I opened a 1.7 windoh and started to rebuild the project.
Apparently it had some problems with the 1.5  links,
I deleted those and that was ok- should links be compatible?
The "make confclean"
option dies part way through and apparently the mixed
binaries don't work too well ( and the fact I changed configure
options may not have helped much either).
rm `find -name "*.o"` seems to have fixed that ( probably
a quirk of the project unless there is some thing in clean
script that hit a cygwin problem, maybe old links I dunno).


It hasn't run into any char issues but it hit what
appears to be an issue with a function pointer.
( the point of the above story is that both I and the "project" may
be a bit confused at this point so take this FWIW).
 This error,

styles/qgtkstyle_p.cpp: In member function `virtual void QGtkStylePrivate::initG
tkWidgets() const':
styles/qgtkstyle_p.cpp:506: error: `gtk_init_abi_check' is not a member of `QGtk
StylePrivate'
make[1]: *** [.obj/release-shared/qgtkstyle_p.o] Error 1
make: *** [sub-gui-make_default-ordered] Error 2

points to this line, ( note that the "abi_check" is not here),
./src/gui/styles/qgtkstyle_p.cpp:506:
    QGtkStylePrivate::gtk_init (NULL, NULL);

and it goes away ( AFAIK right now), if I change the line to this,
( retyped, may not be exact)

(*QGtkStylePrivate::gtk_init) (NULL, NULL);



anyone know offhand what this issue may be or should I just
go get the cygwin port? I can't find this gtk_init_abi_check anywhere
in the project as either source or remaining temp file.
Where is the compiler getting the "gtk_init_abi_check" name? It
is acting as if it thought it found a compile time constant and just
tossed it in there.


 The relevant lines include,

./src/gui/styles/qgtkstyle_p.cpp:506:        QGtkStylePrivate::gtk_init (NULL, N
ULL);
./src/gui/styles/qgtkstyle_p.h:82:typedef void (*Ptr_gtk_init)(int *, char ***);

As near as I could tell, this pointer variable is getting set ( would get set
if it ran LOL) from
something called libgtk.resolve()


$ grep -n "Ptr_gtk_init" `cat fff| grep -v " "`
./src/gui/styles/qgtkstyle_p.cpp:85:Ptr_gtk_init QGtkStylePrivate::gtk_init = 0;

./src/gui/styles/qgtkstyle_p.cpp:305:    gtk_init = (Ptr_gtk_init)libgtk.resolve
("gtk_init");
./src/gui/styles/qgtkstyle_p.h:82:typedef void (*Ptr_gtk_init)(int *, char ***);

./src/gui/styles/qgtkstyle_p.h:298:    static Ptr_gtk_init gtk_init;

A represenative compiler invoke looks like this,

g++ -c -pipe -g -D_REENTRANT -I/usr/include/glib-2.0
-I/usr/lib/glib-2.0/include -I/usr/include/gtk-2.0
-I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo
-I/usr/include/pango-1.0 -I/usr/include/glib-2.0
-I/usr/lib/glib-2.0/include -I/usr/include/pixman-1
-I/usr/include/freetype2 -I/usr/include/libpng12 -O2 -Wall -W
-D_REENTRANT -I/usr/include/freetype2 -DQT_SHARED -DQT_BUILD_GUI_LIB
-DQT_NO_USING_NAMESPACE -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS
-DQT3_SUPPORT -DQT_MOC_COMPAT -DQT_HAVE_MMX -DQT_HAVE_3DNOW
-DQT_HAVE_SSE -DQT_HAVE_MMXEXT -DQT_HAVE_SSE2 -DQT_NO_OPENTYPE
-DQT_NO_STYLE_MAC -DQT_NO_STYLE_WINDOWSVISTA -DQT_NO_STYLE_WINDOWSXP
-DQT_NO_STYLE_WINDOWSCE -DQT_NO_STYLE_WINDOWSMOBILE -DQT_NO_STYLE_S60
-DQ_INTERNAL_QAPP_SRC -DQT_NO_DEBUG -DQT_CORE_LIB
-I../../mkspecs/cygwin-g++ -I. -I../../include/QtCore -I../../include
-I../../include/QtGui -I.rcc/release-shared -I../3rdparty/xorg
-I/usr/include/freetype2 -I../3rdparty/harfbuzz/src -Idialogs
-I.moc/release-shared -I/usr/X11R6/include -I.uic/release-shared -o
.obj/release-shared/moc_qgtkstyle_p.o
.moc/release-shared/moc_qgtkstyle_p.cpp


Eventually the build ran into something that looks like a pthread problem
but I was curious about this issue as it looks like sometihng odd with
function pointer.




Thanks.





-- 
marchywka AT gmail DOT com
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Mike Marchywka
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