Move to Brent Cooks portable

VERSION

@@ -0,0 +1 @@
+0.0.7

configure.ac

@@ -1,23 +1,103 @@
-AC_INIT(bgpq4,0.0.7,job@sobornost.net)
-AM_INIT_AUTOMAKE
+#
+# Copyright (c) 2019 Brent Cook
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
+AC_INIT([bgpq4], m4_esyscmd([tr -d '\n' < VERSION]), job@sobornost.net)
+
+AC_CANONICAL_HOST
+AM_INIT_AUTOMAKE([subdir-objects foreign])
 AC_CONFIG_MACRO_DIR([m4])
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+AC_PROG_CC([cc gcc])
 
-AC_PACKAGE_URL(https://github.com/bgp/bgpq4)
-AC_CONFIG_HEADERS([config.h])
-AM_SILENT_RULES([yes])
+case $host_os in
+	*darwin*)
+		HOST_OS=darwin
+		AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV])
+		;;
+	*freebsd*)
+		HOST_OS=freebsd
+	;;
+	*linux*)
+		HOST_OS=linux
+		CFLAGS="$CFLAGS -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_GNU_SOURCE"
+		AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV])
+		;;
+	*netbsd*)
+		HOST_OS=netbsd
+		;;
+	*openbsd*)
+		HOST_OS=openbsd
+		AC_DEFINE([HAVE_ATTRIBUTE__BOUNDED__], [1], [OpenBSD has __bounded__])
+		AC_DEFINE([HAVE_ATTRIBUTE__DEAD], [1], [OpenBSD has __dead])
+		;;
+	*solaris*)
+		HOST_OS=solaris
+		CFLAGS="$CFLAGS -D__EXTENSIONS__ -D_XOPEN_SOURCE=600 -DBSD_COMP"
+		;;
+	*) ;;
+esac
+
+AM_CONDITIONAL([HOST_DARWIN],  [test x$HOST_OS = xdarwin])
+AM_CONDITIONAL([HOST_FREEBSD], [test x$HOST_OS = xfreebsd])
+AM_CONDITIONAL([HOST_LINUX],   [test x$HOST_OS = xlinux])
+AM_CONDITIONAL([HOST_NETBSD],  [test x$HOST_OS = xnetbsd])
+AM_CONDITIONAL([HOST_SOLARIS], [test x$HOST_OS = xsolaris])
 
 AC_PROG_CC
-CC=cc
-CFLAGS="${CFLAGS} -std=gnu11"
-
+AC_PROG_CC_STDC
+AM_PROG_CC_C_O
 AC_PROG_LIBTOOL
-
 AC_PROG_INSTALL
 
-AM_CONDITIONAL([HAVE_STRLCPY], [test "x$ac_cv_func_strlcpy" = xyes])
+AC_ARG_ENABLE(warnings,
+	AS_HELP_STRING([--disable-warnings],
+	    [ enable compiler warnings [default=enabled]]),
+	[case $enableval in
+	    yes) enable_warnings=yes;;
+	    no) enable_warnings=no;;
+	    *) enable_warnings=yes;; esac],
+    enable_warnings=yes)
 
-AC_CHECK_HEADERS([sys/cdefs.h sys/queue.h sys/tree.h sys/select.h])
+if test "$enable_warnings" = yes; then
+	AM_CFLAGS="$AM_CFLAGS -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wshadow -Wpointer-arith -Wsign-compare -Werror-implicit-function-declaration"
+	save_cflags="$CFLAGS"
+	CFLAGS=-Wno-pointer-sign
+	AC_MSG_CHECKING([whether CC supports -Wno-pointer-sign])
+	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
+	    [AC_MSG_RESULT([yes])]
+	    [WARN_CFLAGS=-Wno-pointer-sign],
+	    [AC_MSG_RESULT([no])]
+	)
+	AM_CFLAGS="$AM_CFLAGS $WARN_CFLAGS"
+	CFLAGS="$save_cflags"
+fi
+
+AC_MSG_CHECKING([if compiling with clang])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
+#ifndef __clang__
+	not clang
+#endif
+	]])],
+	[AC_MSG_RESULT([yes])]
+	[CLANG_FLAGS=-Qunused-arguments],
+	[AC_MSG_RESULT([no])]
+)
+AM_CFLAGS="$AM_CFLAGS $CLANG_FLAGS"
+AM_LDFLAGS="$LDFLAGS $CLANG_FLAGS"
+AC_SUBST(AM_CFLAGS)
+AC_SUBST(AM_LDFLAGS)
 
 AC_CHECK_FUNCS(strlcpy)
 AC_CHECK_FUNCS(pledge)
@@ -25,6 +105,10 @@ AC_CHECK_FUNCS(pledge)
 AC_CHECK_LIB(socket,socket)
 AC_CHECK_LIB(nsl,getaddrinfo)
 
+AC_CHECK_HEADERS([sys/cdefs.h sys/queue.h sys/tree.h sys/select.h])
+
+AM_CONDITIONAL([HAVE_STRLCPY], [test "x$ac_cv_func_strlcpy" = xyes])
+
 AC_CONFIG_FILES([
 	Makefile
 	include/Makefile

include/Makefile.am

@@ -1,6 +1,6 @@
 noinst_HEADERS =
-noinst_HEADERS += string.h
 noinst_HEADERS += sys/_null.h
 noinst_HEADERS += sys/queue.h
 noinst_HEADERS += sys/tree.h
 noinst_HEADERS += sys/types.h
+noinst_HEADERS += string.h