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-rw-r--r--m4/netdb_h.m459
1 files changed, 59 insertions, 0 deletions
diff --git a/m4/netdb_h.m4 b/m4/netdb_h.m4
new file mode 100644
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+++ b/m4/netdb_h.m4
@@ -0,0 +1,59 @@
+# netdb_h.m4 serial 15
+dnl Copyright (C) 2008-2022 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_ONCE([gl_NETDB_H],
+[
+ AC_REQUIRE([gl_NETDB_H_DEFAULTS])
+ gl_CHECK_NEXT_HEADERS([netdb.h])
+ if test $ac_cv_header_netdb_h = yes; then
+ HAVE_NETDB_H=1
+ else
+ HAVE_NETDB_H=0
+ fi
+ AC_SUBST([HAVE_NETDB_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 <netdb.h>]],
+ [getaddrinfo freeaddrinfo gai_strerror getnameinfo])
+])
+
+# gl_NETDB_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_NETDB_MODULE_INDICATOR],
+[
+ dnl Ensure to expand the default settings once only.
+ gl_NETDB_H_REQUIRE_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])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd. It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_NETDB_H_REQUIRE_DEFAULTS],
+[
+ m4_defun(GL_MODULE_INDICATOR_PREFIX[_NETDB_H_MODULE_INDICATOR_DEFAULTS], [
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETADDRINFO])
+ ])
+ m4_require(GL_MODULE_INDICATOR_PREFIX[_NETDB_H_MODULE_INDICATOR_DEFAULTS])
+ AC_REQUIRE([gl_NETDB_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_NETDB_H_DEFAULTS],
+[
+ dnl Assume proper GNU behavior unless another module says otherwise.
+ HAVE_STRUCT_ADDRINFO=1; AC_SUBST([HAVE_STRUCT_ADDRINFO])
+ HAVE_DECL_FREEADDRINFO=1; AC_SUBST([HAVE_DECL_FREEADDRINFO])
+ HAVE_DECL_GAI_STRERROR=1; AC_SUBST([HAVE_DECL_GAI_STRERROR])
+ HAVE_DECL_GETADDRINFO=1; AC_SUBST([HAVE_DECL_GETADDRINFO])
+ HAVE_DECL_GETNAMEINFO=1; AC_SUBST([HAVE_DECL_GETNAMEINFO])
+ REPLACE_GAI_STRERROR=0; AC_SUBST([REPLACE_GAI_STRERROR])
+ REPLACE_GETADDRINFO=0; AC_SUBST([REPLACE_GETADDRINFO])
+])