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<p class="MsoNormal"><span lang="EN-US">libc_global_reent structure will take
1kb SRAM. This relic is too big for a system with only a few k sram. Though the
pointer to libc_reent is used in thread dispatch, it is not a must for thread
dispatch.</span></p>
<br><br><div class="gmail_quote">2008/5/8 ÑÖíµ <<a href="mailto:yanmiaobest@gmail.com">yanmiaobest@gmail.com</a>>:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br>
<br>
I am trying to disable newlibc.c reentrant support. And Our goal is to<br>
defer as many things as possible to link time. To that end, newlibc.c<br>
should be splitted. bsp_libc_init(in bsppost.c) calls libc_init, which<br>
is defined in newlibc.c(in libcsupport directory). There are also some<br>
libc reentrant hooks defined in newlibc.c plus the libc_global_reent<br>
variable. So I create a new file newlibc_init.c in<br>
cpukit/libcsupport/src(of course need to modify the Makefile), which<br>
has only one function(libc_init, copied from newlibc.c), and a<br>
variable definition(libc_global_reent copied from newlibc.c), and I<br>
also move the definition of RTEMS_NEWLIB_EXTENSION to confdefs.h,<br>
wrapped by CONFIGURE_DISABLE_NEWLIB_REENTRANCY macro. If you do not<br>
want newlibc reentrancy support, you define macro<br>
CONFIGURE_DISABLE_NWELIB_REENTRANCY in your application configuration<br>
file as before, and libc reentrant hooks will no be linked; If you<br>
need newlibc reentrancy code, you do nothing. Is that OK?<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Thanks & Best Regards!<br><br>Ray, Xu