Use `$(EGREP)' instead of `grep -E'.

diff --git a/doc/Makefile.am b/doc/Makefile.am
index e8068a09bf84c6f15a8f95099e59e9737d4696e4..74ff5c8959048f11021ea41ff5051c12284ebd9d 100644 (file)
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -40,14 +40,14 @@ check-texinfo:
        $(EGREP) '$(_W)NUL$(W_)' $(srcdir)/*.texi && fail=1; \
        grep '\$$@"' $(srcdir)/*.texi && fail=1; \
        grep -n '[^[:punct:]]@footnote' $(srcdir)/*.texi && fail=1; \
-       grep -n filename $(srcdir)/*.texi|grep -vE 'setfilename|{filename}' \
+       grep -n filename $(srcdir)/*.texi|$(EGREP) -v 'setfilename|{filename}' \
          && fail=1; \
        $(PERL) -e 1 2> /dev/null && { $(PERL) -ne \
          '/\bPOSIX\b/ && !/\@acronym{POSIX}/ && !/^\* / || /{posix}/ and print,exit 1' \
          $(srcdir)/*.texi 2> /dev/null || fail=1; }; \
-       grep -iwE 'builtins?' $(srcdir)/*.texi && fail=1; \
-       grep -iwE 'path(name)?s?' $(srcdir)/*.texi \
-         | grep -vE '@vindex PATH$$|@env{PATH}' && fail=1; \
+       $(EGREP) -iw 'builtins?' $(srcdir)/*.texi && fail=1; \
+       $(EGREP) -iw 'path(name)?s?' $(srcdir)/*.texi \
+         | $(EGREP) -v '@vindex PATH$$|@env{PATH}' && fail=1; \
        exit $$fail
 
 check: check-texinfo