This fixes the following build error on older platforms:
./configure: line 37411: syntax error near unexpected token `$am__api_version,lt,1.12,'
./configure: line 37411: `AX_COMPARE_VERSION($am__api_version,lt,1.12,'
A bit of context for the change: older versions of automake did not automatically parse the AC_CONFIG_MACRO_DIR directive, so we have to explicitly tell aclocal to find extra macros there. Also, running libtoolize before aclocal ensures that the libtool macros have been copied into m4 for aclocal to find (otherwise it would sporadically use the libtool macros that came with whatever version of automake was installed, rather than those supplied by libtool itself).
This fixes the following build error on older platforms:
A bit of context for the change: older versions of
automakedid not automatically parse theAC_CONFIG_MACRO_DIRdirective, so we have to explicitly tellaclocalto find extra macros there. Also, runninglibtoolizebeforeaclocalensures that the libtool macros have been copied intom4foraclocalto find (otherwise it would sporadically use the libtool macros that came with whatever version ofautomakewas installed, rather than those supplied by libtool itself).