Added some additional definitions in the udev.def file, and encountered a linking error, where it is...

# kotlin-native

[napperley]

Added some additional definitions in the udev.def file, and encountered a linking error, where it isn't clear what is causing the error:

Task :cinteropUdevLinux FAILED
Exception in thread "main" java.lang.Error: /tmp/tmp360311134357443805.c:26:3: error: expected expression

[napperley]

Below are the definitions added to the file:

static inline void set_fd(int fd, fd_set *set) {
  FD_SET(fd, fd_set);
}

static inline void zero_fd(fd_set *set) {
  FD_ZERO(fd_set);
}

static inline int fd_is_set(int fd, fd_set *set) {
  int result = FS_ISSET(fd, fd_set);
  return result;
}

[basher]

Can we see the contents of the temp file?

[napperley]

Are you referring to the udev.def file?

[napperley]

Definition file for the udev library.

udev.def

[msink]

You didn't include header where FD_SET is defined.

[napperley]

With the deb package that is used (name: libudev-dev, version: 237-3ubuntu10.25) the source doesn't seem to exist anywhere, which makes it very difficult to track down missing definitions.

[msink]

Hm, difficult? First link in google FD_SET
#include <sys/select.h>

[napperley]

The libudev has its own version of fd_set (struct) and related macros.

[msink]

Are you sure?
AFAIK libudev is part of systemd, so I cloned systemd sources - there is not single occurence of FD_SET,

[napperley]

That is very strange since libudev used to be separate 🤔.

[msink]

"In April 2012, udev's codebase was merged into the systemd source tree, making systemd 183 the first version to include udev"

[basher]

referring to Exception in thread "main" java.lang.Error: /tmp/tmp360311134357443805.c:26:3: error: expected expression. Presumably that .c is something K/N generated from your def file or something like that, we might be able to work backwards from there to figure it out

[msink]

Obvious: 26:3 is line:column starting from === line