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<errno.h> marked as unused when using errno in variadic macro #2588
Description
<errno.h> is marked as unused ( clangd(unused-includes) ) when errno is sent as a parameter of a variadic macro.
errno macro is also not coloured in blue as it should be.
#include <errno.h>
#include <stdio.h>
#define LOG_ERROR(fmt, args...) fprintf(stderr, fmt, ##args)
int main(void)
{
LOG_ERROR("%d\n", errno);
}
System information
Output of clangd --version: 21.1.8
Editor/LSP plugin: VS Codium (v1.96.4) with Clangd Extension (v0.4.0)
Operating system: Linux Debian 13
Activity
[-]header marked as unused when sending errno in variadic macro[/-][+]errno.h marked as unused when sending errno in variadic macro[/+][-]errno.h marked as unused when sending errno in variadic macro[/-][+]errno.h marked as unused when using errno in variadic macro[/+][-]errno.h marked as unused when using errno in variadic macro[/-][+]<errno.h> marked as unused when using errno in variadic macro[/+]HighCommander4 commentedon Feb 5, 2026
What are the
##characters doing in your macro definition?Both of the symptoms you describe disappear if you remove them.