recursively eval in config/x_ac_expand_install_dirs.m4

[ofaaland]

${prefix} is left unexpanded in some path defines processed by config/x_ac_expand_install_dirs.m4. Some macros then include the literal string "${prefix}" in their values as reflected in config/config.h.

define X_DATADIR "${prefix}/share"

define X_INFODIR "${prefix}/share/info"

define X_MANDIR "${prefix}/share/man"

Add adl_RECURSIVE_EVAL() and use it to recursively evaluate the macros in config/x_ac_expand_install_dirs.m4.

Fixes #44

[ofaaland]

Hi @morrone @tonyhutter can you take a look at this? Thanks!

[ofaaland]

I'm going to recommend that you get current latest from the autoconf archive project (named AX_RECURSIVE_EVAL):

https://www.gnu.org/software/autoconf-archive/ax_recursive_eval.html http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_recursive_eval.m4

Good idea. Done.

[ofaaland]

Cherry-picked to master as b15d2bf