Quote macro names passed from autom4te to M4

[Peter Breitenlohner]

Hi,

I recently tried to define autoconf macros for a new language `Lang' using
        [AC_DEFUN([AC_LANG_COMPILER(Lang)], [AC_REQUIRE([AC_PROG_CLANG])])
but as a consequence aclocal failed:
        autom4te ... --trace='AC_LANG_COMPILER(Lang)' ...
        => /bin/sh /usr/bin/m4 ... --trace=AC_LANG_COMPILER(Lang) ...
        => /bin/sh failed with: syntax error at `(' or so.

The reason is, that the macro names passed from autom4te to M4 lack proper
shell quoting.

Attached is a small patch (against git as of today) fixing this problem,
together with a test case.

Regards
Peter Breitenlohner <address@hidden>

0001-Quote-traced-macros-passed-from-autom4te-to-M4.patch
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