diff options
Diffstat (limited to 'm4/netdb_h.m4')
| -rw-r--r-- | m4/netdb_h.m4 | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/m4/netdb_h.m4 b/m4/netdb_h.m4 index db84c787e..eb7c3b8b5 100644 --- a/m4/netdb_h.m4 +++ b/m4/netdb_h.m4 @@ -1,10 +1,10 @@ -# netdb_h.m4 serial 12 +# netdb_h.m4 serial 15 dnl Copyright (C) 2008-2021 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_HEADER_NETDB], +AC_DEFUN_ONCE([gl_NETDB_H], [ AC_REQUIRE([gl_NETDB_H_DEFAULTS]) gl_CHECK_NEXT_HEADERS([netdb.h]) @@ -21,18 +21,33 @@ AC_DEFUN([gl_HEADER_NETDB], [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 Use AC_REQUIRE here, so that the default settings are expanded once only. - AC_REQUIRE([gl_NETDB_H_DEFAULTS]) + 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], [ - GNULIB_GETADDRINFO=0; AC_SUBST([GNULIB_GETADDRINFO]) 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]) |