--- aclocal.m4 2002/11/03 12:21:00 1.98
+++ aclocal.m4 2002/11/03 16:31:34 1.99
@@ -1168,6 +1168,66 @@
])
dnl ##
+dnl ## Check for FD_SETSIZE
+dnl ##
+dnl ## configure.in:
+dnl ## AC_CHECK_FDSETSIZE(<varname>)
+
+AC_DEFUN(AC_CHECK_FDSETSIZE,[dnl
+dnl # 1. determine default value
+AC_MSG_CHECKING(for default value of FD_SETSIZE)
+cross_compiling=no
+AC_TRY_RUN(
+changequote(<<, >>)dnl
+<<
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+int main(int argc, char *argv[])
+{
+ FILE *fp;
+ int ac_fdsetsize;
+#if defined(FD_SETSIZE)
+ ac_fdsetsize = FD_SETSIZE;
+#else
+ ac_fdsetsize = (sizeof(fd_set)*8);
+#endif
+ if ((fp = fopen("conftestval", "w")) == NULL)
+ exit(1);
+ fprintf(fp, "%d\n", ac_fdsetsize);
+ fclose(fp);
+ exit(0);
+}
+>>
+changequote([, ])dnl
+,
+ac_fdsetsize=`cat conftestval`,
+ac_fdsetsize=1024,
+ac_fdsetsize=1024
+)
+AC_MSG_RESULT([$ac_fdsetsize])
+$1="$ac_fdsetsize"
+AC_SUBST($1)
+
+dnl # 2. allow user to force a particular value
+AC_ARG_WITH(fdsetsize,dnl
+[ --with-fdsetsize=NUM set FD_SETSIZE while building GNU Pth],[
+case $withval in
+ [[1-9]][[0-9]]|[[1-9]][[0-9]][[0-9]]|[[1-9]][[0-9]][[0-9]][[0-9]]) $1=$withval ;;
+ * ) AC_ERROR([invalid FD_SETSIZE specified -- allowed: 10-9999]) ;;
+esac
+dnl # we cannot use the usual
+dnl # AC_DEFINE_UNQUOTED(FD_SETSIZE, $$1, [Define to the maximum size of fd_set])
+dnl # here, because FD_SETSIZE has to be defined already before any other
+dnl # system headers are included. Hence we have to use CPPFLAGS.
+CPPFLAGS="$CPPFLAGS -DFD_SETSIZE=$$1"
+AC_MSG_CHECKING([for overridden FD_SETSIZE value])
+AC_MSG_RESULT([$$1])
+])
+
+])
+
+dnl ##
dnl ## Check for an external/extension library.
dnl ## - is aware of <libname>-config style scripts
dnl ## - searches under standard paths include, lib, etc.
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