Merge remote-tracking branch 'origin/maint'

[bison.git] / README-hacking

diff --git a/README-hacking b/README-hacking
index b3364ac3911563eaa5642773f2bf1d19962f56eb..5d9314b7e0b4dc929514a8507c954f82e76a1e42 100644 (file)
--- a/README-hacking
+++ b/README-hacking
@@ -37,6 +37,13 @@ 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
 
@@ -211,6 +218,9 @@ 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