Thanks, That patch seems to fix it.
Peter Kjellerstedt wrote: >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On >> Behalf Of Will Wagner >> Sent: den 12 juni 2008 20:36 >> To: uclibc@uclibc.org >> Subject: sysconf(_SC_MONOTONIC_CLOCK) problem >> >> Hello, >> >> I am using uclicb 0.9.29 on Arm built with buildroot >> >> I want to use monotonic clock support and to test that that >> functionality exists I try the following bit of code: >> >> long x = sysconf(_SC_MONOTONIC_CLOCK); >> bool hasMonotonic = x >= 200112L; >> >> However when I run this sysconf return -1. >> >> Looking at the code it appears this happens if __NR_clock_getres is not >> defined. However looking at the kernel headers I think it is defined >> as: >> >> #define __NR_clock_getres (__NR_SYSCALL_BASE+264) >> >> in unistd.h >> >> If I run this code: >> >> if (syscall(__NR_clock_getres, CLOCK_MONOTONIC, NULL) < 0) >> { >> printf("syscall failed %d", errno); >> return 0; >> } >> >> if (clock_getres(CLOCK_MONOTONIC, NULL) < 0) >> { >> printf("clock_getres failed %d", errno); >> return 0; >> } >> >> Then both calls succeed so the kernel supports this. >> >> From this I assume that uclibc is compiled as if __NR_clock_getres is >> not defined. Does that sound right? >> >> I have looked for configuration options and can not find any for this. >> How can I enable this? >> >> >> Thanks, >> >> Will. > > The problem is that someone added the check for __NR_clock_getres > after I added the support for _SC_MONOTONIC_CLOCK. Unfortunately > they forgot to add an inclusion of sys/sycall.h which means > __NR_clock_getres will never be defined... > > I just committed the following patch to the uClibc repository > which should correct the situation: > > Index: libc/unistd/sysconf.c > =================================================================== > --- libc/unistd/sysconf.c (revision 18424) > +++ libc/unistd/sysconf.c (working copy) > @@ -27,6 +27,7 @@ > #include <stdlib.h> > #include <time.h> > #include <unistd.h> > +#include <sys/syscall.h> > #include <sys/sysinfo.h> > #include <sys/types.h> > #ifdef __UCLIBC_HAS_REGEX__ > > //Peter -- ------------------------------------------------------------------------ Will Wagner [EMAIL PROTECTED] Senior Project Engineer Office Tel: +44 (0)20 7371 2032 Carallon Ltd, Studio G20, Shepherds Building, Rockley Rd, London W14 0DA ------------------------------------------------------------------------ _______________________________________________ uClibc mailing list uClibc@uclibc.org http://busybox.net/cgi-bin/mailman/listinfo/uclibc
