Use putenv() rather than setenv().
treebd3a2de503a8cca897fb8899a094f37b5261975a
-rw-r--r-- 17989 COPYING
-rw-r--r-- 15749 INSTALL
-rw-r--r-- 177 KnownBugs
-rw-r--r-- 592 Makefile.am
-rw-r--r-- 3784 NEWS
-rw-r--r-- 4951 README
-rw-r--r-- 136 THANKS
-rw-r--r-- 60 TODO
-rw-r--r-- 11023 acinclude.m4
-rwxr-xr-x 2443 autogen.sh
-rw-r--r-- 9270 configure.ac
drwxr-xr-x - debian
drwxr-xr-x - doc
drwxr-xr-x - m4
drwxr-xr-x - po
drwxr-xr-x - src
drwxr-xr-x - tests