diff options
Diffstat (limited to 'm4/pselect.m4')
| -rw-r--r-- | m4/pselect.m4 | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/m4/pselect.m4 b/m4/pselect.m4 new file mode 100644 index 0000000000..5a76a7b8d9 --- /dev/null +++ b/m4/pselect.m4 @@ -0,0 +1,31 @@ +# pselect.m4 +dnl Copyright (C) 2011 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_FUNC_PSELECT], +[ + AC_REQUIRE([gl_HEADER_SYS_SELECT]) + AC_REQUIRE([AC_C_RESTRICT]) + AC_CHECK_FUNCS_ONCE([pselect]) + + if test $ac_cv_func_pselect = yes; then + AC_CACHE_CHECK([whether signature of pselect conforms to POSIX], + gl_cv_sig_pselect, + [AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#include <sys/select.h> + ]], + [[int (*p) (int, fd_set *, fd_set *, fd_set *restrict, + struct timespec const *restrict, + sigset_t const *restrict) = pselect; + return !p;]])], + [gl_cv_sig_pselect=yes], + [gl_cv_sig_pselect=no])]) + fi + + if test $ac_cv_func_pselect = no || test $gl_cv_sig_pselect = no; then + REPLACE_PSELECT=1 + fi +]) |