Minor fixes in Makefiles.

* include/mailutils/Makefile.am (errno.h): Use explicit file names
instead of implicit variables.
* include/mailutils/sys/Makefile.am (debcat.h): Likewise.
* libmailutils/diag/Makefile.am (muerrno.c): Likewise.
* libmu_argp/Makefile.am (libmu_argp_la_LIBADD): Use relative path
to .la,

@@ -18,7 +18,7 @@
 BUILT_SOURCES=errno.h types.h
 EXTRA_DIST=errno.hin types.hin
 errno.h: $(top_srcdir)/libmailutils/diag/errors errno.hin
-	$(AM_V_GEN)$(AWK) -f $(mu_aux_dir)/generr.awk $^ > $@
+	$(AM_V_GEN)$(AWK) -f $(mu_aux_dir)/generr.awk $(top_srcdir)/libmailutils/diag/errors errno.hin > errno.h
 
 types.h: $(top_srcdir)/include/mailutils/types.hin Makefile
 	$(AM_V_GEN)sed 's/_MU_OFF_TYPE_/$(MU_OFF_TYPE)/;s/_MU_DEFAULT_RECORD_/$(MU_DEFAULT_RECORD)/' $(top_srcdir)/include/mailutils/types.hin > $@

@@ -66,5 +66,5 @@ sysinclude_HEADERS = \
 BUILT_SOURCES = debcat.h
 
 debcat.h: $(top_srcdir)/libmailutils/diag/debcat
-	$(AM_V_GEN)$(AWK) -f $(mu_aux_dir)/debcat.awk $^ > $@
+	$(AM_V_GEN)$(AWK) -f $(mu_aux_dir)/debcat.awk $(top_srcdir)/libmailutils/diag/debcat > debcat.h
 

@@ -36,7 +36,7 @@ EXTRA_DIST = \
 BUILT_SOURCES = muerrno.c
 
 muerrno.c: errors muerrno.cin
-	$(AWK) -f $(mu_aux_dir)/generr.awk $^ > $@
+	$(AWK) -f $(mu_aux_dir)/generr.awk errors muerrno.cin > muerrno.c
 
 
 

@@ -34,8 +34,6 @@ libmu_argp_la_SOURCES =\
  muinit.c\
  sieve.c
 
-libmu_argp_la_LIBADD=\
- -L${top_builddir}/lib\
- -lmuaux
+libmu_argp_la_LIBADD=../lib/libmuaux.la
 
 libmu_argp_la_LDFLAGS=-version-info @VI_CURRENT@:@VI_REVISION@:@VI_AGE@