I have a compilation error on macOS v11 (Big Sur) with the standard Clang compiler (version 13.0.0).
I am trying to include the sys/sysmacros.h to use the makedev() function which surprisingly is mentioned on the Apple developer website and should be compatible with macOS 15.5+.
Including sys/types.h also gives me an error, however sys/stat.h works. Sadly it still doesn't give me the makedev(), major() and minor() functions that I need.
The Linux manual page of makedev states there were some changes in the glibc library, but as far as I know, macOS does not use the glibc library.
There should be a simple way of installing glibc on macOS using Homebrew (brew) as described here, but I get the same error as was mentioned in this question. So apparently currently there is no proper way of doing it and then I am not sure if this will solve my problem.
Is there a solution to this?
The macro makedev is defined in sys/types.h. Just add #include <sys/types.h> into your files. sys/types.h is a header file of Kernel.framework. You should set it in the Clang invocation, like clang -framework Kernel ....
You can also define these macros as they are defined in sys/types.h:
#define major(x) ((int32_t)(((u_int32_t)(x) >> 24) & 0xff))
#define minor(x) ((int32_t)((x) & 0xffffff))
#define makedev(x, y) ((dev_t)(((x) << 24) | (y)))