Re: automake and flex

[Sebastian Freundt]

Mike Tegtmeyer <address@hidden> writes:

> I'd like to report a possible bug/limitation in automake and it's use
> with flex. It seems that ylwrap strips out or otherwise does not
> recognize the --header-file=foo.h option provided in AM_LFLAGS.  My
> successful useage under 1.9 has been (obviously since ylwrap was not
> called due to there only being one parser):
>
> BUILT_SOURCES = grammar.h
>
> AM_YFLAGS = -d -p foo_parser_
>
> AM_LFLAGS= -Pfoo_parser_ -olex.yy.c --header-file=rules.h
>
> foo_SOURCES = \
>         rules.ll \
>         grammar.yy
>
> make...
>
> /bin/sh ../config/ylwrap rules.ll lex.yy.c rules.cc -- flex  -
> Ppass_parser_ -olex.yy.c --header-file=rules.h
> ...
> grammar.yy:15:21: error: rules.h: No such file or directory
>
> Is this a bug? Or am i using automake incorrectly here?

Yeah, it is IMHO.  I `fixed' it locally here, mimicking yacc.am, diff
below.

Sebastian


diff --git a/lib/am/lex.am b/lib/am/lex.am
index b44daf1..1c8654f 100644
--- a/lib/am/lex.am
+++ b/lib/am/lex.am
@@ -23,7 +23,7 @@ endif %?MAINTAINER-MODE%
 
 ?GENERIC?%EXT%%DERIVED-EXT%:
 ?!GENERIC?%OBJ%: %SOURCE%
-?GENERIC?      $(am__skiplex) $(SHELL) $(YLWRAP) %SOURCE% $(LEX_OUTPUT_ROOT).c 
%OBJ% -- %COMPILE%
+?GENERIC?      $(am__skiplex) $(SHELL) $(YLWRAP) %SOURCE% $(LEX_OUTPUT_ROOT).c 
%OBJ% $(LEX_OUTPUT_ROOT).h %BASE%.h -- %COMPILE%
 ?!GENERIC??DIST_SOURCE?        $(am__skiplex) \
 ## For non-suffix rules, we must emulate a VPATH search on %SOURCE%.
-?!GENERIC?     $(SHELL) $(YLWRAP) `test -f '%SOURCE%' || echo 
'$(srcdir)/'`%SOURCE% $(LEX_OUTPUT_ROOT).c %OBJ% -- %COMPILE%
+?!GENERIC?     $(SHELL) $(YLWRAP) `test -f '%SOURCE%' || echo 
'$(srcdir)/'`%SOURCE% $(LEX_OUTPUT_ROOT).c %OBJ% $(LEX_OUTPUT_ROOT).h %BASE%.h 
-- %COMPILE%