[m4-common] Ignore aliases

[Emmanuele Bassi <ebassi src gnome org>]

commit c71676d7013443402a1fa6db7c2ded6ce130a5b0
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sat Apr 20 21:52:09 2019 +0100

    Ignore aliases
    
    Aliases for old names should be skipped when checking the names that
    have been defined, otherwise we'll always trip a check for a name that
    has been defined but not used.

 Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Makefile.am b/Makefile.am
index 51259aa..9af3869 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -31,7 +31,7 @@ dist_aclocal_DATA = \
 
 # Here, plain m4 is being used to strip 'dnl' comments.
 all-local: $(dist_aclocal_DATA)
-       cat $^ | grep -v '^#' | grep -v 'AX_PACKAGE_REQUIRES' | m4 | grep -o '\<AX_[A-Z0-9_]*[A-Z0-9]\>' | 
sort | uniq > used
+       cat $^ | grep -v '^#' | grep -v 'AX_PACKAGE_REQUIRES' | grep -v 'AU_ALIAS' | m4 | grep -o 
'\<AX_[A-Z0-9_]*[A-Z0-9]\>' | sort | uniq > used
        cat $^ | grep ^AC_DEFUN | grep -o '\<AX_[A-Z0-9_]*\>' | sort | uniq > defined
        diff -u used defined
        rm -f used defined