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One more interesting link along with my previous mail about similar compiler extensions on Solaris. http://www.sun.com/migration/linux/l2s_comp_ext.html (courtesy google) --- comp sci <compsci10hyd@yahoo.com> wrote: > Sir, > Thanks for all the replies. > Iam really not sure , but I think this is a > normal memory shared among multiple processes.In QT > based application(porting from MFC based app) this > is > used in the following way: > I have a main window in which I register my > window handle (save the self referencing pointer) in > a > shared variable.Later Iam starting a new window(sort > of plugin) using execl and I want this plugin to > register itself to the main window using the already > stored main window handle in shared variable. > In Windows this scenerio is implemented using > pragma directives etc.The segment name "SharedMem" > is > never mentioned elsewhere and the members of this > segment will become globals and can be used by other > processes. > Other reference (by Mr.Dan) is the > following,but > Iam not so intellegent to understand what it means. > http://sources.redhat.com/ml/cygwin/1998-05/msg00599.html > This discussion will be very interesting to a > beginner like me and hope to hear from you regarding > this. > Sincerely, > Ram Kumar. > > > --- Carl Miller <chaz@energoncube.net> wrote: > > > Right now Iam trying to port a windows > > > application onto Linux.But Iam struck with the > > > following implementation of windows specific > > > directives.How can I port this shared memory > > section > > > onto Linux ? Please help me in this > > regard...Thanking > > > you, > > > Ram Kumar. > > > > > > #pragma data_seg("SharedMem") > > > #pragma bss_seg("SharedMem") > > > > > > char AppDesc[ MAX_PENCILS ][30]; > > > > > > #pragma data_seg() > > > #pragma bss_seg() > > > #pragma comment(linker, > "/SECTION:SharedMem,rws") > > > > Well, at first glance, I was about to recommend > that > > this list might not be the best place to address > > that > > question, as crossgcc is primarily concerned with > > building, configuring, and using the GNU compiler > > collection and binary utilities as a > cross-compiler > > (i.e. the machine the output program runs on is > not > > the same as the machine the compiler runs on). > > > > But on second glance, maybe it's not all that > > offtopic after all. What little you've told us so > > far seems to be hinting toward a custom linker > > script, and this is one of the few places where > > GNU ld linker scripts get discussed in detail with > > regularity (just because they typically need to be > > customized a bit for each cross target, whereas a > > native compiler typically has a perfectly usable > > linker script right out of the box). > > > > But in order to say more with any confidence, > you'd > > need to tell us more about this shared memory > > segment. What is it shared with? How is it > > created? Is it a range of memory-mapped hardware > > registers? Is it an OS-managed segment of normal > > memory shared among multiple processes? Using > > what API? This "SharedMem" area must be mentioned > > elsewhere in the code, headers, or build scripts. > > What do the other references say about it? > > > > > > Carl Miller > > chaz@energoncube.net > > > > ------ > > Want more information? See the CrossGCC FAQ, > > http://www.objsw.com/CrossGCC/ > > Want to unsubscribe? Send a note to > > crossgcc-unsubscribe@sources.redhat.com > > > > > __________________________________ > Do you Yahoo!? > The New Yahoo! Shopping - with improved product > search > http://shopping.yahoo.com > > ------ > Want more information? See the CrossGCC FAQ, > http://www.objsw.com/CrossGCC/ > Want to unsubscribe? Send a note to > crossgcc-unsubscribe@sources.redhat.com > __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com
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