Makefile: use $PKGCONFIG, use += and ?= BSD extensions

Allows to use cross-compilation for ${triple}-pkg-config on systems
like Exherbo without special handling.

The BSD extensions += and ?= for variable extension is used to avoid having
to explicitely pass a list of variables to make, thus making build recipies
simpler.
Only issue is when CC is unset, you will get CC=c99, which doesn't works as c11
is used. Consider doing something like the following in your build recipes:

	make CC=${CC:-cc}

Reported-by: danyspin97

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index 75752b0..6ce8eef 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ Dependencies are:
 - A pkg-config implementation (pkgconf is recommended)
 - (optionnal) gettext implementation (such as GNU Gettext)
 
-Compilation is done with `make`, install with `make install`. An example AppArmor profile is provided at `usr.bin.badwolf`, please do runtime checks before deploying.
+Compilation is done with `make CC=${CC:-cc}`, install with `make install`. An example AppArmor profile is provided at `usr.bin.badwolf`, please do runtime checks before deploying.
 
 ## Notes
 Most of the privacy/security stuff will be done with patches against WebKit as quite a lot isn’t into [WebKitSettings](https://webkitgtk.org/reference/webkit2gtk/stable/WebKitSettings.html) and with generic WebKit extensions that should be resuseable.