Add note about 'pkg-config' solving problem with autoconf 2.68 or older

(Cygwin/MinGW, OS X)

* autogen.sh: Add comment about 'pkg-config'.
* TODO: Remove note about 'autoreconf' failure.

1 files changed, 3 insertions, 0 deletions

diff --git a/autogen.sh b/autogen.sh
index 98b91da9..42dc8c3a 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -4,6 +4,9 @@ set -e
 # This script creates (or regenerates) configure (as well as aclocal.m4,
 # config.h.in, Makefile.in, etc.) missing in the source repository.
 
+# Note: in case of problems (e.g., in cygwin/mingw or OS X), please make
+# sure 'pkg-config' is installed on your host.
+
 autoreconf -i
 
 echo