require autoconf 2.68+ / gtk 2.18+ / glib 2.28+

[wdlkmpx]

These are commits by gkarsay.

Initial steps to update the codebase: delete some old code so that new changes can happen

Release dates:

• gtk 2.18: 2009-09-23
• autoconf 2.68: 2010-09-22
• glib 2.28: 2011-02-08

Changes

• build system: remove support for GTK+ 1.x and update to autoconf 2.68
• remove support for GTK+ 1.x from source
• remove support for GTK+ < 2.18
• remove support for GLib 1.x
• remove deprecated g_thread_init()

That GTK+ < 2.18 is misleading because there are many gtk1 widgets that will be replaced .. eventually.

g_thread_init is not required by mhWaveEdit, but "some versions of the aRts C library call g_thread_init internally"

That probably means that aRts support should be removed..

[wdlkmpx]

I performed some tests and everything seems to be ok.

To test these changes you can download and unzip this file (theoretically) https://github.com/wdlkmpx/mhwaveedit/archive/patch1.zip

run sh gitcompile.sh, the resulting binary is /usr/local/bin/mhwaveedit

[wdlkmpx]

Closing, see #15 for more details.