ObjFW  Diff

	AC_EGREP_CPP(egrep_cpp_yes, [
		#include <TargetConditionals.h>

		#if (!defined(TARGET_OS_IPHONE) || !TARGET_OS_IPHONE) && \
		    (!defined(TARGET_OS_SIMULATOR) || !TARGET_OS_SIMULATOR)
		egrep_cpp_yes
		#endif
	], [
	], [], [
		AC_MSG_RESULT(yes)
		have_subprocesses="yes"

		AC_CHECK_FUNCS(posix_spawnp)
		AC_CHECK_HEADERS(spawn.h)
	], [
		AC_MSG_RESULT(no)
		have_subprocesses="no"
	])
	;;
mingw*)
	have_subprocesses="yes"
	;;
msdosdjgpp*)
	have_subprocesses="no"
	;;
*)
esac
AS_IF([test x"$have_subprocesses" = x""], [
	AC_HEADER_SYS_WAIT
	AC_CHECK_FUNCS(kill)

	AC_CHECK_FUNCS(posix_spawnp, [
		AS_IF([test x"$ac_cv_func_kill" = x"yes"], [
			have_subprocesses="yes"

			AC_CHECK_HEADERS(spawn.h, [have_subprocesses="yes"])
		])
			AC_CHECK_HEADERS(spawn.h)
		])
	], [
	])

	AS_IF([test x"$have_subprocesses" = x""], [
		AC_CHECK_FUNCS([vfork dup2 execvp _exit], [
			AS_IF([test x"$ac_cv_func_vfork" = x"yes" \
			    -a x"$ac_cv_func_pipe" = x"yes" \
			    -a x"$ac_cv_func_dup2" = x"yes" \
			    -a x"$ac_cv_func_execvp" = x"yes" \
			    -a x"$ac_cv_func_kill" = x"yes" \
			    -a x"$ac_cv_func__exit" = x"yes"], [
				have_subprocesses="yes"
			])
		], [
			break
		])
	])
	;;
esac
])
AS_IF([test x"$have_subprocesses" = x"yes"], [
	AC_SUBST(OF_SUBPROCESS_M, "OFSubprocess.m")
	AC_DEFINE(OF_HAVE_SUBPROCESSES, 1, [Whether we have subprocesses])
])

AC_CHECK_HEADERS_ONCE([complex.h sys/ioctl.h sys/ttycom.h])
AC_CHECK_FUNCS(isatty)