The latest version of lex requires the latest m4 to build, add a dependency

when running the build-tools stage.

The requirement is due to the -P flag used when running m4 from usr.bin/lex
Makefile to generate skel.c.  With the old m4 that fails and the failure is
ignored, resulting in an empty(-ish) skel.c, which leads to later build
failures when the misconfigured new lex tool is run.

This enables building -current (and 10-stable after MFC) on a stable-8
system again.

MFC after:	3 days

diff --git a/Makefile.inc1 b/Makefile.inc1
index 389950cdf046450d452b0229f2fec9025239b742..e2c967daeb9e69cf9884775f9677fb9dae206dbd 100644 (file)
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -1322,6 +1322,8 @@ _cat=             bin/cat
 
 .if ${BOOTSTRAPPING} < 1000033
 _lex=          usr.bin/lex
+
+${_bt}-usr.bin/lex: ${_bt}-usr.bin/m4
 .endif
 
 # r277259 crunchide: Correct 64-bit section header offset