[master] Put libtool macros in m4macros/

Makefile.am

@@ -1,3 +1,7 @@
+ACLOCAL_AMFLAGS = -I m4macros ${ACLOCAL_FLAGS}
+# ^^^^^^^^ This has to be the first line and cannot come later in this
+# Makefile.am due to some bork in some versions of autotools.
+
 SUBDIRS = compatcheck doc src tests
 USE_LCOV=@USE_LCOV@
 LCOV=@LCOV@

configure.ac

@@ -7,6 +7,7 @@ AC_CONFIG_SRCDIR(README)
 AM_INIT_AUTOMAKE
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])dnl be backward compatible
 AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_MACRO_DIR([m4macros])
 
 # Checks for programs.
 AC_PROG_CXX

m4macros/.gitignore

@@ -0,0 +1,5 @@
+libtool.m4
+lt~obsolete.m4
+ltoptions.m4
+ltsugar.m4
+ltversion.m4