commit feae92498356789d19883424cc078e8e8827626b
Author: John Darrington <jmd@gnu.org>
Date:   Sun Dec 1 08:28:54 2013 +0100

    HACKING: Updated advice about possible errors in ./bootstrap process.
    
    Commit ff1cbb95383b25cf1d6b533c8a046329ee53d1db made errors due to
    missing pkg.m4 appear earlier rather than later.  This commit updates
    the HACKING file to reflect that.

diff --git a/HACKING b/HACKING
index ef8fb27..4037b10 100644
--- a/HACKING
+++ b/HACKING
@@ -30,9 +30,12 @@ you didn’t run it, you may get the following error:
   make: *** No rule to make target `nix/libstore/schema.sql', needed by
   `nix/libstore/schema.sql.hh'
 
-Then, as always, run ‘./configure’.  If you get an error like this one:
+If you get an error like this one:
+
+configure.ac:46: error: possibly undefined macro: PKG_CHECK_MODULES
+      If this token and others are legitimate, please use m4_pattern_allow.
+      See the Autoconf documentation.
 
-  ./configure: line 6755: `PKG_CHECK_MODULES(GUILE, guile-2.0 >= 2.0.5)'
 
 it probably means that Autoconf couldn’t find ‘pkg.m4’, which is provided by
 pkg-config.  Make sure that ‘pkg.m4’ is available.  For instance, if you
@@ -43,6 +46,8 @@ installed Automake in ‘/usr/local’, it wouldn’t look for ‘.m4’ files i
 
 See “info '(automake) Macro Search Path'” for more information.
 
+Then, as always, run `./. configure'.
+
 Finally, you have to invoke ‘make check’ to run tests.  If anything fails,
 take a look at “info '(guix) Installation'” or send a message to
 <guix-devel@gnu.org>.