1 files changed, 42 insertions, 0 deletions
diff --git a/freebsd-compat.h b/freebsd-compat.h
new file mode 100644
index 0000000..5e39c5a
--- /dev/null
+++ b/freebsd-compat.h
@@ -0,0 +1,42 @@
+#pragma once
+
+#define _GNU_SOURCE
+
+#include <stdint.h>
+
+#include <sys/param.h>
+// Ensure we use a BSD powerof2 that works in static_assert (unlike glibc's).
+#undef powerof2
+#define powerof2(x) ((((x)-1)&(x))==0)
+// This is in BSD's <sys/param.h>.
+#define nitems(x) (sizeof((x))/sizeof((x)[0]))
+
+// This is used as the size of the write buffer of sectors.
+#define MAXPHYS (1024 * 1024)
+
+//#define static_assert _Static_assert
+
+// TODO: do we actually want this, or should we live without?
+#define SIGINFO SIGUSR2
+
+
+// On glibc, these headers use `__unused` as an identifier, so drag them in
+// first.
+#include <sys/stat.h>
+#if __has_include(<sys/sysctl.h>)
+#include <sys/sysctl.h>
+#endif
+// Bionic, like the BSDs, has __unused. glibc doesn't.
+#if defined(__GLIBC__)
+#define __unused __attribute__((__unused__))
+#endif
+// Neither macOS nor glibc has __packed.
+#if defined(__APPLE__) || defined(__GLIBC__)
+#define __packed __attribute__((__packed__))
+#endif
+
+// The BSDs (including Android and macOS) have getprogname(), but glibc doesn't.
+#if defined(__GLIBC__)
+#include <errno.h>
+static inline char* getprogname() { return program_invocation_short_name; }
+#endif