configure.in

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dnl Process this file with autoconf to produce a configure script.
AC_INIT(main.c)

AM_INIT_AUTOMAKE(links, 1.00)
AM_CONFIG_HEADER(config.h)

dnl Checks for programs.
AC_PROG_CC

AC_HEADER_STDC
AC_PROG_GCC_TRADITIONAL

AC_MSG_CHECKING([for EMX])
AC_TRY_COMPILE(, [#ifndef __EMX__
kill me!
#endif ], have_emx=yes, have_emx=no)
AC_MSG_RESULT($have_emx)
test "$ac_cv_have_emx" = yes && LDFLAGS="`echo "$LDFLAGS" | sed "s/-Zexe//g" | sed "s/-Zbin-files//g"` -Zcrtdll"

AC_MSG_CHECKING([for typeof])
AC_TRY_COMPILE(, [int a;
typeof(a) b;], have_typeof=yes, have_typeof=no)
AC_MSG_RESULT($have_typeof)
test "$have_typeof" = yes && AC_DEFINE(HAVE_TYPEOF)

AC_MSG_CHECKING([for long long])
AC_TRY_COMPILE(, [unsigned long long a; ], have_long_long=yes, have_long_long=no)
AC_MSG_RESULT($have_long_long)
test "$have_long_long" = yes && AC_DEFINE(HAVE_LONG_LONG)

dnl Checks for header files.
AC_HEADER_DIRENT
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS(fcntl.h limits.h sys/ioctl.h sys/time.h time.h unistd.h)
AC_CHECK_HEADERS(sigaction.h)
AC_CHECK_HEADERS(netinet/in_systm.h)
AC_CHECK_HEADERS(netinet/in_system.h)
AC_CHECK_HEADERS(netinet/ip.h)
AC_CHECK_HEADERS(sys/select.h)
AC_CHECK_HEADERS(sys/resource.h)
AC_CHECK_HEADERS(wait.h)
AC_CHECK_HEADERS(sys/utsname.h)
AC_CHECK_HEADERS(sys/un.h)
AC_CHECK_HEADERS(sys/fmutex.h)
AC_CHECK_HEADERS(sys/cygwin.h)
AC_CHECK_HEADERS(io.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
AC_TYPE_SIZE_T
AC_CACHE_CHECK([for socklen_t], ac_cv_have_socklen_t,
	AC_TRY_COMPILE([
	#include <sys/types.h>
	#include <sys/socket.h>
	], [
		socklen_t a = 0;
		return a;
	], ac_cv_have_socklen_t=yes, ac_cv_have_socklen_t=no)
)
if test "$ac_cv_have_socklen_t" = yes; then
	AC_DEFINE(HAVE_SOCKLEN_T)
fi

AC_HEADER_TIME
AC_STRUCT_TM

AC_CACHE_CHECK([if rename can replace existing files], ac_cv_rename_over_existing_files,
	AC_TRY_RUN([
	#include <fcntl.h>
	#include <stdio.h>
	#include <unistd.h>

	int main()
	{
		int ret;
		close(creat("conftest.rename1", 0600));
		close(creat("conftest.rename2", 0600));
		ret = rename("conftest.rename1", "conftest.rename2");
		unlink("conftest.rename1");
		unlink("conftest.rename2");
		return !!ret;
	}
	], ac_cv_rename_over_existing_files=yes, ac_cv_rename_over_existing_files=no, ac_cv_rename_over_existing_files=no)
)

if test "$ac_cv_rename_over_existing_files" = yes; then
	AC_DEFINE(RENAME_OVER_EXISTING_FILES)
fi

dnl Checks for library functions.
AC_FUNC_MEMCMP
AC_TYPE_SIGNAL
AC_FUNC_STRFTIME
AC_FUNC_VPRINTF
AC_HAVE_FUNCS(memmove)
AC_HAVE_FUNCS(raise)
AC_HAVE_FUNCS(gettimeofday mkdir select strcspn strerror strstr strtol strtoul strtoq strtoll chmod)
AC_HAVE_FUNCS(getpid setpgid)
AC_HAVE_FUNCS(popen)
AC_HAVE_FUNCS(uname)
AC_HAVE_FUNCS(getpagesize)
AC_HAVE_FUNCS(tempnam)

if test "$ac_cv_func_select" != yes; then
	AC_ERROR([select function not present])
fi
if test "$ac_cv_func_strtol" != yes; then
	AC_ERROR([strtol function not present])
fi

dnl Checks for libraries.
dnl Replace `main' with a function in -lgpm:
AC_CHECK_LIB(gpm, Gpm_Open)
AC_CHECK_HEADERS(gpm.h)

dnl Replace `main' with a function in -lsocket:
AC_CHECK_FUNC(socket, cf_result=yes, cf_result=no)
if test "$cf_result" = no; then
	AC_CHECK_LIB(socket, socket)
	if test "$ac_cv_lib_socket_socket" = no; then
		AC_ERROR([socket function not present])
	fi
fi
AC_CHECK_FUNC(setsockopt, cf_result=yes, cf_result=no)
if test "$cf_result" = no; then
	AC_CHECK_LIB(socket, setsockopt)
fi

#AC_MSG_CHECKING([for gethostbyname])
#AC_TRY_LINK([#include <netdb.h>], [gethostbyname("")], cf_result=yes, cf_result=no)
#AC_MSG_RESULT($cf_result)
AC_CHECK_FUNC(gethostbyname, cf_result=yes, cf_result=no)
if test "$cf_result" = no; then
	AC_CHECK_LIB(socket, gethostbyname)
	if test "$ac_cv_lib_socket_gethostbyname" = no; then
		AC_CHECK_LIB(nsl, gethostbyname)
		if test "$ac_cv_lib_nsl_gethostbyname" = no; then
			AC_ERROR([gethostbyname function not present])
		fi
	fi
fi

AC_CHECK_FUNC(gethostbyaddr, AC_DEFINE(HAVE_GETHOSTBYADDR))

AC_CHECK_FUNC(herror, AC_DEFINE(HAVE_HERROR))
AC_CHECK_FUNC(cfmakeraw, AC_DEFINE(HAVE_CFMAKERAW))

AC_HAVE_FUNCS(cygwin_conv_to_full_win32_path)

AC_MSG_CHECKING([for OS/2 threads])
CFLAGS_X="$CFLAGS"
CFLAGS="$CFLAGS -Zmt"
AC_TRY_LINK([#include <stdlib.h>], [_beginthread(NULL, NULL, 0, NULL)], cf_result=yes, cf_result=no)
AC_MSG_RESULT($cf_result)
if test "$cf_result" = yes; then
	AC_DEFINE(HAVE_BEGINTHREAD)
else
	CFLAGS="$CFLAGS_X"
#	AC_CHECK_FUNC(pthread_create, cf_result=yes, cf_result=no)
#	if  test "$cf_result" = yes; then
#		AC_DEFINE(HAVE_PTHREADS)
#	else
#		AC_CHECK_LIB(pthread, pthread_create, AC_DEFINE(HAVE_PTHREADS)
#		LDFLAGS="$LDFLAGS -lpthread" )
#	fi
fi
#AC_CHECK_FUNC(clone, AC_DEFINE(HAVE_CLONE))

AC_CHECK_FUNC(MouOpen, AC_DEFINE(HAVE_MOUOPEN))
AC_CHECK_FUNC(_read_kbd, AC_DEFINE(HAVE_READ_KBD))

AC_MSG_CHECKING([for XFree for OS/2])
CFLAGS_X="$CFLAGS"
LIBS_X="$LIBS"
cf_result=no
if test -n "$X11ROOT"; then
	CFLAGS="$CFLAGS_X -I$X11ROOT/XFree86/include"
	LIBS="$LIBS_X -L$X11ROOT/XFree86/lib -lxf86_gcc"
	AC_TRY_LINK([#include <pty.h>], [struct winsize win;ptioctl(1, TIOCGWINSZ, &win)], cf_result=yes, cf_result=no)
	if test "$cf_result" = no; then
		LIBS="$LIBS_X -L$X11ROOT/XFree86/lib -lxf86"
		AC_TRY_LINK([#include <pty.h>], [struct winsize win;ptioctl(1, TIOCGWINSZ, &win)], cf_result=yes, cf_result=no)
	fi
fi
if test "$cf_result" != yes; then
	CFLAGS="$CFLAGS_X"
	LIBS="$LIBS_X"
else
	AC_DEFINE(X2)
fi
AC_MSG_RESULT($cf_result)

AC_CHECK_LIB(dl, dlopen)
#ifdef HAVE_SSL
AC_ARG_WITH(ssl, [  --without-ssl           disable SSL support], [if test "$withval" = no; then disable_ssl=yes; fi])
CFLAGS_X="$CFLAGS"
LIBS_X="$LIBS"
cf_result=no
if test -z "$disable_ssl"; then
	PKG_CHECK_MODULES(OPENSSL,openssl,pkgconfig_openssl=yes,pkgconfig_openssl=no)
	if test "$pkgconfig_openssl" = "yes"; then
		AC_MSG_CHECKING([for OpenSSL])
		CPPFLAGS="$CPPFLAGS `pkg-config openssl --cflags-only-I`"
		LIBS="$LIBS `pkg-config openssl --libs`"
		AC_TRY_LINK([#include <openssl/ssl.h>], [OpenSSL_add_all_algorithms()], cf_result=yes, cf_result=no)
		if test "$cf_result" != yes; then
			AC_TRY_LINK([#include <openssl/ssl.h>], [SSLeay_add_ssl_algorithms()], cf_result=yes, cf_result=no)
	   	fi
	else
		AC_MSG_CHECKING([for OpenSSL])
		for ssldir in "" /usr /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/local/www /usr/lib/ssl /usr/local /usr/pkg /opt /opt/openssl; do
			if test "$cf_result" = no; then
				if test ! -z "$ssldir" && test "$ssldir" != /usr; then
					LIBS="-L$ssldir/lib -lssl -lcrypto $LIBS_X"
					CFLAGS="$CFLAGS_X -I$ssldir/include"
				else
					LIBS="-lssl -lcrypto $LIBS_X"
				fi
				AC_TRY_LINK([#include <openssl/ssl.h>], [OpenSSL_add_all_algorithms()], cf_result=yes, cf_result=no)
				if test "$cf_result" != yes; then
					AC_TRY_LINK([#include <openssl/ssl.h>], [SSLeay_add_ssl_algorithms()], cf_result=yes, cf_result=no)
				fi
			fi
		done
	fi

	AC_MSG_RESULT($cf_result)

	if test "$cf_result" != yes; then
		if test "$withval" = yes; then
			AC_MSG_ERROR("OpenSSL not found")
		fi
	        CFLAGS="$CFLAGS_X"
        	LIBS="$LIBS_X"
	else
		AC_DEFINE(HAVE_SSL)
	fi
fi
#endif

test "$have_emx" = yes && LDFLAGS="$LDFLAGS -Zexe"

AC_OUTPUT(Makefile)