use command -v instead of which

[xlex8]

Makes the build POSIX compliant by not using 'which'

[xlex8]

@Kangie @eli-schwartz
This should fix the issue with 'which'

[rodarima]

Thanks Alex. Merging with capitalized "Use" in the commit message.

[rodarima]

Merged here: 9880c1b

[eli-schwartz]

@Kangie @eli-schwartz This should fix the issue with 'which'

I had pointed out in the associated issue that this isn't really the correct fix, but oh well. :)

[rodarima]

I had pointed out in the associated issue that this isn't really the correct fix, but oh well. :)

The issue #262 states that the problem is that the configure uses which(1), which is not posix compliant and there is no dependency documented anywhere. Using command -v makes the configure process posix compliant, so it is one correct solution to the problem.

Additionally, it makes Dillo remove the dependency over which(1), so that is a bonus.

I'm aware of AC_PATH_PROG to search for programs, just it is not needed for this particular case.