Use alias instead of exported function for which to avoid bashism,

http://unix.stackexchange.com/questions/59360/#59431

which.spec

@@ -1,7 +1,7 @@
 Summary: Displays where a particular program in your path is located
 Name: which
 Version: 2.20
-Release: 9%{?dist}
+Release: 10%{?dist}
 License: GPLv3
 Group: Applications/System
 Source0: http://www.xs4all.nl/~carlo17/which/%{name}-%{version}.tar.gz
@@ -60,6 +60,10 @@ rm -rf $RPM_BUILD_ROOT
 %{_mandir}/*/*
 
 %changelog
+* Thu Feb 19 2015 Till Maas <opensource@till.name> - 2.20-10
+- Use alias instead of exported function for which to avoid bashism,
+http://unix.stackexchange.com/questions/59360/#59431
+
 * Wed Feb 18 2015 Till Maas <opensource@till.name> - 2.20-9
 - Check functions (#1194044)
 - Use %%license

which2.sh

@@ -1,8 +1,4 @@
 # Initialization script for bash and sh
 
 # export AFS if you are in AFS environment
-which ()
-{
-    (alias; declare -f) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot "$@"
-}
-export -f which
+alias which='(alias; declare -f) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot'