+ if(!env_set)
+ {
+ const FS::Path &prefix = builder.get_prefix();
+ if(prefix.str()!="/usr")
+ {
+ FS::Path pcdir = prefix/"lib/pkgconfig";
+ if(const char *pcp = getenv("PKG_CONFIG_PATH"))
+ {
+ vector<string> path = split(pcp, ':');
+ bool found = false;
+ for(vector<string>::const_iterator i=path.begin(); (!found && i!=path.end()); ++i)
+ found = (*i==pcdir.str());
+ if(!found)
+ {
+ path.push_back(pcdir.str());
+ setenv("PKG_CONFIG_PATH", join(path.begin(), path.end(), ":").c_str(), true);
+ }
+ }
+ else
+ setenv("PKG_CONFIG_PATH", pcdir.str().c_str(), true);
+ }
+ }
+