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Richard: This seems like the best way. Syscalls.c is the best place to look for "hooks" into the library. b.g. On Thu, Apr 25, 2002 at 12:50:11PM -0600, Richard Slaughter wrote: > Hi all, > I'm using gcc 3.0.4 with newlib 10 for the ARM processor on a single board > computer. > I need to tie my real time clock into the time functions of newlib. > should this be done by replacing the gettimeofday function in syscalls.c > or is there a better way. > Thanks > Richard Slaughter > > -----Original Message----- > From: William A. Gatliff [mailto:bgat@billgatliff.com] > Sent: Thursday, April 25, 2002 11:48 AM > To: mschmid@ascona.de > Cc: crossgcc@sources.redhat.com > Subject: Re: How to build applications for an embeded linux target using > newlib ? > > > Mathias: > > > Newlib can be used as a linux runtime, starting with version 1.10.0. > > If you have a properly built and installed newlib, you should be able > to do powerpc-eabi-gcc and the library (libc.a) will get linked in > automagically. Use the same prefix you used when you built gcc. > > Libgloss is a small library of helper functions. I think it's mostly > intended for the cross toolchain, I don't think you need it for code > running on a target if you have newlib or glibc. > > Newlib is much smaller than glibc, but provides less functionality. > If you don't need anything more than a basic libc, newlib is an > excellent choice even in a linux environment. If you need the stuff > that glibc provides (dynamic linking, locales, boatloads of other > stuff) then you'll want to run with glibc. > > To build newlib for linux, specify --target=<xxx>-linux > --build=<whatever your build machine is), i.e.: > > configure --target=powerpc-linux --build=i386-pc-cygwin > > I don't think you want a powerpc-eabi toolchain, I think you want a > powerpc-linux toolchain. > > > HTH, > > > b.g. > > > On Thu, Apr 25, 2002 at 05:52:40PM +0100, mschmid@ascona.de wrote: > > Hi > > > > I have built a crossgcc running on cygwin for powerpc target. > > With this crossgcc i successfuly built a linux kernel for my embeded > > powerpc target. > > Now i want to build applications to run on this linux system. > > Therefore i built newlib with the following configuration: > > > > --target=powerpc-eabi-linux-gnu --host=i686-pc-cygwin > > --build=i686-pc-cygwin > > > > I did run make and make install successfuly. > > Now i have multiple directories with the built libraries. > > I use the libc from the "lin" directory. > > I am able to build a simple application using libc and libnosys. > > But which files do i need to link against my applications if i want to use > > system specific things like fork(), mkdir(), etc. . > > > > Does newlib provide this special stubs for linux within a library ? > > What is libgloss for ? > > Is it at all possible to build applications for linux with newlib or is it > > better to use glibc ? > > I searched the www, but i did not find answers to all my questions. > > > > Appreciate for any hints or information. > > > > Thanks > > Mathias > > > > > > > > ------ > > Want more information? See the CrossGCC FAQ, > http://www.objsw.com/CrossGCC/ > > Want to unsubscribe? Send a note to > crossgcc-unsubscribe@sources.redhat.com > > > > -- > Bill Gatliff > bgat@billgatliff.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 -- Bill Gatliff bgat@billgatliff.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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