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fix nob_nprocs build on FreeBSD/BSD under -std=c99 #279

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fix nob_nprocs build on FreeBSD/BSD under -std=c99 #279

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c2edb6b
fix nob_nprocs build on FreeBSD/BSD under -std=c99
Sep 26, 2026
7ac192c
narrowed selection; working on OpenBSD now
Sep 26, 2026
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40 changes: 35 additions & 5 deletions nob.h
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Original file line number Diff line number Diff line change
Expand Up @@ -167,13 +167,19 @@
# include <io.h>
# include <shellapi.h>
#else
# ifdef __APPLE__
# include <mach-o/dyld.h>
# if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
# ifndef __BSD_VISIBLE
# define __BSD_VISIBLE 1
# endif
# endif
# ifdef __FreeBSD__
# include <sys/types.h>
# if defined(__FreeBSD__)
# include <sys/param.h>
# include <sys/sysctl.h>
# endif
# include <sys/types.h>
# ifdef __APPLE__
# include <mach-o/dyld.h>
# endif
# include <sys/wait.h>
# include <sys/stat.h>
# include <unistd.h>
Expand Down Expand Up @@ -1293,7 +1299,31 @@ NOBDEF int nob_nprocs(void)
GetSystemInfo(&siSysInfo);
return siSysInfo.dwNumberOfProcessors;
#else
return sysconf(_SC_NPROCESSORS_ONLN);
#ifdef _SC_NPROCESSORS_ONLN
{
long n = sysconf(_SC_NPROCESSORS_ONLN);
if (n > 0) return (int)n;
}
#endif
#if defined(__FreeBSD__)
{
#if defined(CTL_HW) && defined(HW_NCPU)
int mib[2] = {CTL_HW, HW_NCPU};
int ncpu = 0;
size_t len = sizeof(ncpu);
if (sysctl(mib, 2, &ncpu, &len, NULL, 0) == 0 && ncpu > 0)
return ncpu;
#endif
{
int ncpu = 0;
size_t len = sizeof(ncpu);
if (sysctlbyname("hw.ncpu", &ncpu, &len, NULL, 0) == 0 &&
ncpu > 0)
return ncpu;
}
}
#endif
return 1;
#endif
}

Expand Down