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Diffstat (limited to 'm4/poll_h.m4')
-rw-r--r-- | m4/poll_h.m4 | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/m4/poll_h.m4 b/m4/poll_h.m4 new file mode 100644 index 000000000..49306746c --- /dev/null +++ b/m4/poll_h.m4 @@ -0,0 +1,47 @@ +# poll_h.m4 serial 2 +dnl Copyright (C) 2010-2013 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. + +dnl Written by Bruno Haible. + +AC_DEFUN([gl_POLL_H], +[ + dnl Use AC_REQUIRE here, so that the default behavior below is expanded + dnl once only, before all statements that occur in other macros. + AC_REQUIRE([gl_POLL_H_DEFAULTS]) + + AC_CHECK_HEADERS_ONCE([poll.h]) + if test $ac_cv_header_poll_h = yes; then + HAVE_POLL_H=1 + else + HAVE_POLL_H=0 + fi + AC_SUBST([HAVE_POLL_H]) + + dnl <poll.h> is always overridden, because of GNULIB_POSIXCHECK. + gl_CHECK_NEXT_HEADERS([poll.h]) + + dnl Check for declarations of anything we want to poison if the + dnl corresponding gnulib module is not in use. + gl_WARN_ON_USE_PREPARE([[#include <poll.h>]], + [poll]) +]) + +AC_DEFUN([gl_POLL_MODULE_INDICATOR], +[ + dnl Use AC_REQUIRE here, so that the default settings are expanded once only. + AC_REQUIRE([gl_POLL_H_DEFAULTS]) + gl_MODULE_INDICATOR_SET_VARIABLE([$1]) + dnl Define it also as a C macro, for the benefit of the unit tests. + gl_MODULE_INDICATOR_FOR_TESTS([$1]) +]) + +AC_DEFUN([gl_POLL_H_DEFAULTS], +[ + GNULIB_POLL=0; AC_SUBST([GNULIB_POLL]) + dnl Assume proper GNU behavior unless another module says otherwise. + HAVE_POLL=1; AC_SUBST([HAVE_POLL]) + REPLACE_POLL=0; AC_SUBST([REPLACE_POLL]) +]) |