| 1 | # inet_pton.m4 serial 19
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| 2 | dnl Copyright (C) 2006, 2008-2021 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | AC_DEFUN([gl_FUNC_INET_PTON],
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| 8 | [
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| 9 | AC_REQUIRE([gl_ARPA_INET_H_DEFAULTS])
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| 10 |
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| 11 | dnl Persuade Solaris <arpa/inet.h> to declare inet_pton.
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| 12 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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| 13 |
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| 14 | AC_REQUIRE([AC_C_RESTRICT])
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| 15 |
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| 16 | dnl Most platforms that provide inet_pton define it in libc.
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| 17 | dnl Solaris 8..10 provide inet_pton in libnsl instead.
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| 18 | dnl Solaris 2.6..7 provide inet_pton in libresolv instead.
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| 19 | dnl Haiku provides it in -lnetwork.
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| 20 | dnl Native Windows provides it in -lws2_32 instead, with a declaration in
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| 21 | dnl <ws2tcpip.h>, and it uses stdcall calling convention, not cdecl
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| 22 | dnl (hence we cannot use AC_CHECK_FUNCS, AC_SEARCH_LIBS to find it).
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| 23 | HAVE_INET_PTON=1
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| 24 | INET_PTON_LIB=
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| 25 | gl_PREREQ_SYS_H_WINSOCK2
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| 26 | if test $HAVE_WINSOCK2_H = 1; then
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| 27 | dnl It needs to be overridden, because the stdcall calling convention
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| 28 | dnl is not compliant with POSIX. Set REPLACE_INET_PTON in order to avoid
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| 29 | dnl a name conflict at the linker level, even though the header file
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| 30 | dnl <ws2tcpip.h> declares inet_pton only if _WIN32_WINNT >= 0x0600.
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| 31 | REPLACE_INET_PTON=1
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| 32 | AC_CHECK_DECLS([inet_pton],,, [[#include <ws2tcpip.h>]])
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| 33 | if test $ac_cv_have_decl_inet_pton = yes; then
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| 34 | INET_PTON_LIB="-lws2_32"
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| 35 | else
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| 36 | HAVE_DECL_INET_PTON=0
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| 37 | fi
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| 38 | else
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| 39 | gl_save_LIBS=$LIBS
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| 40 | AC_SEARCH_LIBS([inet_pton], [nsl resolv network], [],
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| 41 | [AC_CHECK_FUNCS([inet_pton])
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| 42 | if test $ac_cv_func_inet_pton = no; then
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| 43 | HAVE_INET_PTON=0
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| 44 | fi
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| 45 | ])
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| 46 | LIBS=$gl_save_LIBS
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| 47 |
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| 48 | if test "$ac_cv_search_inet_pton" != "no" \
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| 49 | && test "$ac_cv_search_inet_pton" != "none required"; then
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| 50 | INET_PTON_LIB="$ac_cv_search_inet_pton"
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| 51 | fi
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| 52 |
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| 53 | AC_CHECK_HEADERS_ONCE([netdb.h])
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| 54 | AC_CHECK_DECLS([inet_pton],,,
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| 55 | [[#include <arpa/inet.h>
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| 56 | #if HAVE_NETDB_H
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| 57 | # include <netdb.h>
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| 58 | #endif
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| 59 | ]])
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| 60 | if test $ac_cv_have_decl_inet_pton = no; then
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| 61 | HAVE_DECL_INET_PTON=0
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| 62 | fi
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| 63 | fi
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| 64 | AC_SUBST([INET_PTON_LIB])
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| 65 | ])
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| 66 |
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| 67 | # Prerequisites of lib/inet_pton.c.
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| 68 | AC_DEFUN([gl_PREREQ_INET_PTON], [
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| 69 | AC_REQUIRE([gl_SOCKET_FAMILIES])
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| 70 | ])
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