Hi,
When building wine CVS I received this m4 warning (m4 is called from
flex):
flex -Cf -d -Ppp -olex.yy.c -8 ./ppl.l
stdin:14206: m4: Warning: Excess arguments to built-in `m4_ifdef' ignored
Subsequently, gcc threw pages of warnings and errors while trying to
compile lex.yy.c. I traced the problem to line 48 in a comment of
libs/wpp/ppl.l:
* | {ws} # {ws} {number} " {anytext} " {number} [{number} [{number}]]\n
The problem is m4 interprets the ']]' as the end of an argument. In
order to prevent m4 from making this mistake, I simply inserted a space
between the two brackets. One-line patch attached. I'm not familiar
enough with m4 to say if this is a proper fix, but it works.
Paul Laufer
GNU m4 1.4
flex 2.5.31
--- libs/wpp/ppl.l.orig 2003-05-22 14:39:38.000000000 -0700
+++ libs/wpp/ppl.l 2003-05-22 14:48:20.000000000 -0700
@@ -45,7 +45,7 @@
* | {ws} # {ws} error {ws} {anytext} \n
* | {ws} # {ws} warning {ws} {anytext} \n
* | {ws} # {ws} line {ws} " {anytext} " {number} \n
- * | {ws} # {ws} {number} " {anytext} " {number} [{number} [{number}]]\n
+ * | {ws} # {ws} {number} " {anytext} " {number} [{number} [{number}] ]\n
* | {ws} # {ws} \n
*
* ws := [ \t\r\f\v]*
