[PATCH wayland-web] Added depencies and bug fixes to build instructions

[Thierry Reding]

On Wed, May 21, 2014 at 02:54:36PM -0700, Bill Spitzak wrote:
> On 05/21/2014 02:16 PM, Thierry Reding wrote:
> 
> >While I agree with the other points, I think it's perfectly consistent
> >for --version to output the version of pkg-config itself. There's
> >--modversion if you want to query the version of a given package.
> 
> It's fine that "pkg-config --version" prints the version of pkg-config.
> 
> My complaint is that "pkg-config --version xyz" does the exact same thing,
> completely ignoring the "xyz"!

Even that is completely consistent. I've tried a number of binaries on
my system and they all behave in exactly the same way. gcc, ar, gdb, ld,
libtool and even chromium ignore anything that follows --version.

> I'm pretty certain the result is not what the user expects. It sure
> fooled me, I wasted a lot of time trying to figure out why all my
> attempts to install or compile a package refused to change the
> version number!

When I use a program that I've never used before I tend to go read the
manpage or at least see if there's anything interesting in the --help
output. If you run pkg-config --help or look at the manpage it clearly
states that --version will output the version of pkg-config. It also
says that --modversion will output the version for a package.

The help screen and the manpage exist so you don't have to guess or make
assumptions about how a program behaves or what options it takes and the
effect they have.

Thierry
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