Re: grep/egrep -w non-portable (doc/Makefile.am)

[Paul Eggert]

Albert Chin <address@hidden> writes:

> It doesn't cause "make check" to fail but it is annoying. How about
> using $(GREP) and $(EGREP) and in configure.ac we:
>   AC_CHECK_PROGS(GREP, [ggrep grep], grep)
>   AC_CHECK_PROGS(EGREP, [gegrep egrep], egrep)

I worry that this will collide with AC_PROG_GREP and AC_PROG_EGREP.

I installed this patch instead; it's a bit ugly, but it should work.

2004-11-03  Paul Eggert  <address@hidden>

        * Makefile.am (_W, W_): New macros.
        (check-texinfo): Use them instead of assuming grep -w (which is not
        portable).

Index: Makefile.am
===================================================================
RCS file: /fetish/cu/doc/Makefile.am,v
retrieving revision 1.33
retrieving revision 1.34
diff -p -u -r1.33 -r1.34
--- Makefile.am 12 Oct 2004 07:58:47 -0000      1.33
+++ Makefile.am 3 Nov 2004 17:39:00 -0000       1.34
@@ -24,16 +24,20 @@ MAINTAINERCLEANFILES = constants.texi
 $(DVIS): $(EXTRA_DIST)
 $(INFO_DEPS): $(EXTRA_DIST)
 
+# Extended regular expressions to match word starts and ends.
+_W = (^|[^A-Za-z0-9_])
+W_ = ([^A-Za-z0-9_]|$$)
+
 # List words/regexps here that should not appear in the texinfo documentation.
 # E.g., use @sc{nul}, not `NUL'
 # and use `time zone', not `timezone'.
 check-texinfo:
        fail=0; \
        grep timezone $(srcdir)/*.texi && fail=1; \
-       grep -w IO $(srcdir)/*.texi && fail=1; \
+       $(EGREP) '$(_W)IO$(W_)' $(srcdir)/*.texi && fail=1; \
        grep non-zero $(srcdir)/*.texi && fail=1; \
        grep '@url{' $(srcdir)/*.texi && fail=1; \
-       grep -w NUL $(srcdir)/*.texi && fail=1; \
+       $(EGREP) '$(_W)NUL$(W_)' $(srcdir)/*.texi && fail=1; \
        grep '\$$@"' $(srcdir)/*.texi && fail=1; \
        grep -n '[^[:punct:address@hidden' $(srcdir)/*.texi && fail=1; \
        grep -n filename $(srcdir)/*.texi|grep -vE 'setfilename|{filename}' \