fix misc build failures re: pkgconf detection

I really should do funny jpm alternative things,
there's really no reason for a package manager that strongly depends on
native bindings to not integrate typical tools like pkgconfig.
It's also unfortunate that project.janet cannot have any configure-time
dependencies, meaning that every project needs to duplicate any such
utilities in-line.

1 files changed, 7 insertions, 6 deletions

diff --git a/project.janet b/project.janet
index e4d530e..f0c7f83 100644
--- a/project.janet
+++ b/project.janet
@@ -35,12 +35,13 @@
                (fn pkgconf
                  [defval & args]
                  (if bin
-                   (->> (-> bin
-                            (execute ;args)
-                            (get :out)
-                            string/trim)
-                        (string/split " ")
-                        (filter |(< 0 (length $))))
+                   (or (-?>> (-?> bin
+                                 (execute ;args)
+                                 (get :out)
+                                 string/trim)
+                            (string/split " ")
+                            (filter |(< 0 (length $))))
+                       defval)
                    defval))))
 (def {:cflags  curl-cflags
       :ldflags curl-ldflags}