Linux Kernel error: missing binary operator before token "("

Question

Some simple preprocessor code in Linux Kernel module gives the following error:

missing binary operator before token "("

The code:

#if defined(AAA) || defined(BBB)

#if LINUX_VERSION_CODE <= KERNEL_VERSION(3,13,0)
#define SOME 111
#else
#define SOME 222
#endif

#define OTHER 999

#else

#define SOME 1
#define OTHER 9

#endif /* AAA || BBB */

That post didn't help.

use `gcc -E` to figure out what it expands to. – Antti Haapala -- Слава Україні Apr 01 '19 at 13:48 — Antti Haapala -- Слава Україні, Apr 01 '19 at 13:48

bruno · Accepted Answer · 2019-04-01T14:54:58.753

6

that error means KERNEL_VERSION is not defined

you missed to #include <linux/version.h>

Edit

About kernel version see also : Is there a macro definition to check the Linux kernel version?

edited Apr 01 '19 at 14:54

answered Apr 01 '19 at 13:53

bruno

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Linux Kernel error: missing binary operator before token "("

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