+7 Troubleshooting
+*****************
+
+When troubleshooting build issues, the following files relative to the
+`build/' directory may be especially useful:
+
+`GNUmakefile'
+ Top-level makefile which contains build settings generated via
+ configure.
+
+`log/config.info.txt'
+ Record of output from configure.
+
+`log/config.verbose.txt'
+ Record of verbose output from configure.
+
+`log/build.txt'
+ Record of output from `configure --launch'. Similar output may be
+ recorded using `make' depending on which shell is in use, eg:
+ `make >& log/build.txt' or `make > log/build.txt 2>&1'.
+
+`log/xcodemake.env.txt'
+ Environment (variables) dump as seen when Xcode forks `make'.
+ Mac OS X only.
+