X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/bcbbf654863dd285b176a0f54a75a28c4bdac1d3..bb8e56ff67d289d15f1a4dc7f5e1502cd3bbfc24:/README-hacking

diff --git a/README-hacking b/README-hacking
index bb91ac06..2b92edcf 100644
--- a/README-hacking
+++ b/README-hacking
@@ -35,6 +35,13 @@ of the .output file etc.  This excludes impossible error messages
 (comparable to assert/abort), and all the --trace output which is
 meant for the maintainers only.
 
+** Horizontal tabs
+Do not add horizontal tab characters to any file in Bison's repository
+except where required.  For example, do not use tabs to format C code.
+However, make files, ChangeLog, and some regular expressions require
+tabs.  Also, test cases might need to contain tabs to check that Bison
+properly processes tabs in its input.
+
 
 * Working from the repository
 
@@ -226,6 +233,9 @@ release:
   that it does not make sense for glr.c, which should be ANSI, but
   currently is actually GNU C, nor for lalr1.cc.
 
+- Test with a very recent version of GCC for both C and C++.  Testing
+  with older versions that are still in use is nice too.
+
 
 * Release Procedure
 This section needs to be updated to take into account features from