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trader/m4/README
John Zaitseff 2032f6de8a Move redefinition of _XOPEN_SOURCE into its own Autoconf macro and header
This makes the main source code look a little cleaner, at the expense of
background magic happening in the configure-generated config.h.  But this
magic was already happening for _GNU_SOURCE, __EXTENSIONS__ and the like.

The only wrinkle is that newer versions of NcursesW cause ./configure to
include "-D_XOPEN_SOURCE=600" as part of the compilation command line--on
systems that support _XOPEN_SOURCE=700.  The AC_DEFINE/AC_DEFINE_UNQUOTED
macros automatically comment out any "#undef" lines in config.h, so the
file lib/xopen_source.h works around this limitation.  It is
automatically included by config.h.
2018-08-09 18:05:39 +10:00

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**************************************************************************
* *
* Star Traders: A Game of Interstellar Trading *
* Copyright (C) 1990-2018, John Zaitseff *
* *
**************************************************************************
This directory, m4, contains M4 macros used by Autoconf.
The following macros are custom-defined for Star Traders:
xopen_source.m4
The following macros are from the Autoconf Archive project, as detailed on
that project's web site, https://www.gnu.org/software/autoconf-archive/:
ax_c___attribute__.m4
ax_cflags_warn_all.m4
ax_compiler_vendor.m4
ax_prepend_flag.m4
ax_require_defined.m4
ax_with_curses.m4
The following macro was generated by running the GNU Portability Library
"gnulib-tool" with appropriate command line options, as detailed on that
project's web site, https://www.gnu.org/software/gnulib/:
gnulib-cache.m4