From c2edb6b932294773979b4f0a7a28c267402d1980 Mon Sep 17 00:00:00 2001
From: devuan <devuan@devuan.devuan>
Date: Sat, 26 Sep 2026 03:10:32 -0500
Subject: [PATCH 1/2] fix nob_nprocs build on FreeBSD/BSD under -std=c99

---
 nob.h | 34 ++++++++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

diff --git a/nob.h b/nob.h
index 2bdb16b..25ac2eb 100644
--- a/nob.h
+++ b/nob.h
@@ -167,10 +167,16 @@
 #    include <io.h>
 #    include <shellapi.h>
 #else
+#    if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
+#        ifndef __BSD_VISIBLE
+#            define __BSD_VISIBLE 1
+#        endif
+#    endif
 #    ifdef __APPLE__
 #        include <mach-o/dyld.h>
 #    endif
-#    ifdef __FreeBSD__
+#    if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
+#        include <sys/param.h>
 #        include <sys/sysctl.h>
 #    endif
 #    include <sys/types.h>
@@ -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__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
+    {
+#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
 }
 

From 7ac192c75b2ae70a903887914604afc2d521f6a6 Mon Sep 17 00:00:00 2001
From: devuan <devuan@devuan.devuan>
Date: Sat, 26 Sep 2026 04:09:38 -0500
Subject: [PATCH 2/2] narrowed selection; working on OpenBSD now

---
 nob.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/nob.h b/nob.h
index 25ac2eb..50f379a 100644
--- a/nob.h
+++ b/nob.h
@@ -172,14 +172,14 @@
 #            define __BSD_VISIBLE 1
 #        endif
 #    endif
-#    ifdef __APPLE__
-#        include <mach-o/dyld.h>
-#    endif
-#    if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
+#    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>
@@ -1305,7 +1305,7 @@ NOBDEF int nob_nprocs(void)
         if (n > 0) return (int)n;
     }
 #endif
-#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
+#if defined(__FreeBSD__)
     {
 #if defined(CTL_HW) && defined(HW_NCPU)
         int mib[2] = {CTL_HW, HW_NCPU};