Markus Armbruster
77d3da4f09
Document the need for the XSI Extension. Don't list curses as required, it's actually optional. Correct advice for Solaris. Add advice for AIX. Drop references to C89; we actually require C99, and POSIX.1-2001 provides it. Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
252 lines
7.5 KiB
Text
252 lines
7.5 KiB
Text
#
|
|
# Empire - A multi-player, client/server Internet based war game.
|
|
# Copyright (C) 1986-2020, Dave Pare, Jeff Bailey, Thomas Ruschak,
|
|
# Ken Stevens, Steve McClure, Markus Armbruster
|
|
#
|
|
# Empire is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
# ---
|
|
#
|
|
# See files README, COPYING and CREDITS in the root of the source
|
|
# tree for related information and legal notices. It is expected
|
|
# that future projects/authors will amend these files as needed.
|
|
#
|
|
# ---
|
|
#
|
|
# configure.ac: Autoconf input file
|
|
#
|
|
# Known contributors to this file:
|
|
# Markus Armbruster, 2005-2020
|
|
#
|
|
# Process this file with autoconf to produce a configure script.
|
|
|
|
# Autoconf makes checking for and programming around assorted ancient
|
|
# crap relatively painless. But why bother? Just rely on POSIX, and
|
|
# when something breaks on some oddball machine, see whether it's
|
|
# worth fixing.
|
|
|
|
AC_PREREQ(2.69)
|
|
AC_INIT([Wolfpack Empire],
|
|
m4_esyscmd([build-aux/git-version-gen .tarball-version]),
|
|
[wolfpack@wolfpackempire.com], [empire],
|
|
[http://www.wolfpackempire.com/])
|
|
AC_CONFIG_SRCDIR([include/combat.h])
|
|
AC_CONFIG_AUX_DIR([build-aux])
|
|
AC_CONFIG_MACRO_DIR([m4])
|
|
AC_CONFIG_HEADERS([config.h])
|
|
|
|
### Checks for programs
|
|
AC_PROG_AWK
|
|
AC_PROG_INSTALL
|
|
AC_PROG_RANLIB
|
|
|
|
AC_PROG_CC_STDC
|
|
AM_PROG_CC_C_O
|
|
# Private automake macro, tsk, tsk, tsk...
|
|
_AM_DEPENDENCIES(CC)
|
|
AC_DEFINE([_XOPEN_SOURCE], [600],
|
|
[Request POSIX-1.2001 with XSI Extension])
|
|
# Note: this is after AC_PROG_CC_STDC, because Solaris cc fails with
|
|
# _XOPEN_SOURCE unless switched to C99, which breaks AC_PROG_CC_STDC.
|
|
|
|
AC_ARG_VAR(NROFF, [nroff command])
|
|
AC_CHECK_PROG(NROFF, groff, [GROFF_NO_SGR= groff -Tascii -U], nroff)
|
|
|
|
# not really a check for a program, but close enough
|
|
if test -d $srcdir/.git
|
|
then revctrl=git
|
|
else revctrl=
|
|
fi
|
|
if test "$revctrl" && test -r $srcdir/.tarball-version
|
|
then AC_MSG_ERROR([$srcdir/.tarball-version must not exist])
|
|
fi
|
|
AC_SUBST(revctrl,$revctrl)
|
|
|
|
# Not a program, but need to check this early
|
|
MY_WINDOWS_API
|
|
|
|
|
|
### Checks for libraries
|
|
AX_PTHREAD
|
|
LIBS_util="$LIBS"
|
|
LIBS="$LIBS_SOCKETS $LIBS"
|
|
AX_LIB_SOCKET_NSL
|
|
LIBS_server="$LIBS"
|
|
MY_WITH_READLINE
|
|
|
|
|
|
### Checks for header files
|
|
|
|
|
|
### Checks for typedefs, structures, and compiler characteristics
|
|
|
|
# Enable useful warnings
|
|
# Some of them are commented out because the code needs cleanup first
|
|
# Clang needs to be tested with -Werror=unknown-warning-option
|
|
AX_CHECK_COMPILE_FLAG([-Werror=unknown-warning-option],
|
|
[cflags_test="-Werror=unknown-warning-option"],
|
|
[cflags_test=""])
|
|
MY_APPEND_COMPILE_FLAGS([-Wall -Wextra dnl
|
|
dnl -Wcast-align dnl
|
|
dnl -Wconversion dnl
|
|
-Wdeclaration-after-statement dnl
|
|
dnl -Wformat-nonliteral dnl
|
|
-Wformat-security dnl
|
|
-Winit-self dnl
|
|
-Wlogical-op dnl
|
|
-Wmissing-prototypes dnl
|
|
-Wnested-externs dnl
|
|
-Wold-style-definition dnl
|
|
-Wpacked dnl
|
|
-Wpointer-arith dnl
|
|
-Wredundant-decls dnl
|
|
dnl -Wshadow dnl
|
|
-Wstrict-prototypes dnl
|
|
dnl too prone to false positives: -Wsuggest-attribute=format dnl
|
|
dnl -Wswitch-default dnl
|
|
-Wundef dnl
|
|
-Wno-unused-parameter dnl
|
|
], [], [$cflags_test])
|
|
|
|
# Our carg() conflicts with libm's TODO clean that up
|
|
MY_APPEND_COMPILE_FLAGS([-fno-builtin-carg -Wno-incompatible-library-redeclaration])
|
|
|
|
# No multiple definitions of uninitialized global variables
|
|
MY_APPEND_COMPILE_FLAGS([-fno-common])
|
|
|
|
# Reign in overzealous optimizers
|
|
#
|
|
# Contemporary compilers can squeeze out some extra performance by
|
|
# assuming the program never executes code that has undefined behavior
|
|
# according to the C standard. Unfortunately, this can break
|
|
# programs. Pointing out that these programs are non-conforming is as
|
|
# correct as it is unhelpful, at least as long as the compiler is
|
|
# unable to diagnose the non-conformingness.
|
|
#
|
|
# Since keeping our programs working is a lot more important to us
|
|
# than running them as fast as possible, forbid some assumptions that
|
|
# are known to break real-world programs:
|
|
#
|
|
# * Aliasing: perfectly clean programs don't engage in type-punning,
|
|
# and perfectly conforming programs do it only in full accordance
|
|
# with the standard's (subtle!) aliasing rules. Neither kind of
|
|
# perfection is realistic for us, therefore -fno-strict-aliasing.
|
|
#
|
|
# * Signed integer overflow: perfectly clean programs won't ever do
|
|
# signed integer arithmetic that overflows. This is an imperfect
|
|
# program, therefore -fno-strict-overflow.
|
|
#
|
|
MY_APPEND_COMPILE_FLAGS([dnl
|
|
-fno-strict-aliasing dnl
|
|
-fno-strict-overflow])
|
|
|
|
# Emit extra code to check for buffer overflows
|
|
# Could fall back to -fstack-protector when -fstack-protector-strong
|
|
# isnt't supported, for users of older compilers. Doesn't seem worth
|
|
# the trouble, though.
|
|
# Some ports of the GNU toolchain reportedly support it in the
|
|
# compiler, but not libc. Use a test program that makes the compiler
|
|
# emit the extra stack checking code, and test it compiles and links.
|
|
AX_APPEND_LINK_FLAGS([-fstack-protector-strong], [], [],
|
|
[AC_LANG_SOURCE([[
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
char arr[64], *dst = arr, *src = argv[0];
|
|
while ((*dst++ = *src++)) ;
|
|
}
|
|
]])])
|
|
|
|
|
|
### Checks for library functions
|
|
|
|
AC_CHECK_FUNCS(getaddrinfo)
|
|
MY_WORKING_IN6_IS_ADDR_V4MAPPED
|
|
MY_FUNC_MAKECONTEXT
|
|
|
|
|
|
### Site configuration
|
|
|
|
# Can't be bothered to make MAXNOC configurable right now.
|
|
AC_DEFINE([MAXNOC], [99],
|
|
[The maximum number of countries])
|
|
|
|
AC_ARG_VAR([EMPIREHOST], [Default host (client only) [127.0.0.1]])
|
|
test "$EMPIREHOST" || EMPIREHOST=127.0.0.1
|
|
|
|
AC_ARG_VAR([EMPIREPORT], [Default port (client and server) [6665]])
|
|
test "$EMPIREPORT" || EMPIREPORT=6665
|
|
|
|
AC_ARG_WITH([pthread],
|
|
AS_HELP_STRING([--with-pthread],
|
|
[use POSIX threads]))
|
|
|
|
# Select thread package
|
|
empthread=
|
|
if test "$with_pthread" != no; then
|
|
if test "$ax_pthread_ok" = yes; then
|
|
empthread=POSIX
|
|
fi
|
|
fi
|
|
if test -z "$with_pthread" || test "$with_pthread" = no; then
|
|
if test "$ac_cv_func_makecontext" = yes; then
|
|
empthread=LWP
|
|
fi
|
|
if test $Windows_API = yes; then
|
|
empthread=Windows
|
|
fi
|
|
fi
|
|
if test -z "$empthread"; then
|
|
AC_MSG_ERROR([No usable thread package found])
|
|
fi
|
|
AC_SUBST(empthread)
|
|
case $empthread in
|
|
LWP) AC_DEFINE([EMPTH_LWP], 1, [Define to use LWP threads]) ;;
|
|
POSIX) AC_DEFINE([EMPTH_POSIX], 1, [Define to use POSIX threads]) ;;
|
|
Windows) AC_DEFINE([EMPTH_W32], 1, [Define to use Windows threads]) ;;
|
|
esac
|
|
|
|
MY_WITH_TERMINFO
|
|
LIBS_client="$LIBS"
|
|
|
|
|
|
### Output
|
|
|
|
LIBS="$LIBS_util"
|
|
AC_SUBST(LIBS_client)
|
|
AC_SUBST(LIBS_server)
|
|
|
|
AC_CONFIG_FILES([GNUmakefile])
|
|
AC_CONFIG_COMMANDS([stamp-h],
|
|
[case $revctrl in
|
|
git)
|
|
mkdir -p `cd $srcdir && git ls-files \
|
|
| sed -n 's,/@<:@^/@:>@*$,,gp' | uniq`
|
|
;;
|
|
*)
|
|
mkdir -p `sed s/.*=// <$srcdir/sources.mk | tr ' ' '\012' \
|
|
| sed -n '/\//s,/@<:@^/@:>@*$,,gp'| uniq`
|
|
esac
|
|
mkdir -p info.html info.nr lib
|
|
touch stamp-h],
|
|
[revctrl=$revctrl])
|
|
AC_OUTPUT
|
|
|
|
AC_MSG_NOTICE([])
|
|
AC_MSG_NOTICE([-= Configuration summary =-])
|
|
AC_MSG_NOTICE([Thread package: $empthread])
|
|
AC_MSG_NOTICE([ readline: $with_readline])
|
|
AC_MSG_NOTICE([ terminfo: $with_terminfo])
|
|
AC_MSG_NOTICE([ EMPIREHOST: $EMPIREHOST])
|
|
AC_MSG_NOTICE([ EMPIREPORT: $EMPIREPORT])
|