Use of reserved identifiers for the include guard in linenoise.h: The behaviour is undefined.

[ViralTaco]

linenoise/linenoise.h

Lines 39 to 40 in d895173

	#ifndef __LINENOISE_H
	#define __LINENOISE_H

According to the C17 standard (ISO/IEC9899:2017), in §7.1.3 Reserved identifiers:

1
All identifiers that begin with an underscore and either an uppercase letter or another underscore are always reserved for any use […]
2
If the program […] defines a reserved identifier as a macro name, the behavior is undefined.

This error is so common that it's often overlooked.
Thankfully, the fix is trivial:

#ifndef LINENOISE_H
#define LINENOISE_H

/*...*/

#endif /* LINENOISE_H */