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Annotation of embedaddon/sudo/m4/ax_func_getaddrinfo.m4, revision 1.1.1.1

1.1       misho       1: #
                      2: # SYNOPSIS
                      3: #
                      4: #   AX_FUNC_GETADDRINFO
                      5: #
                      6: # DESCRIPTION
                      7: #
                      8: #   Checks for the getaddrinfo function in the standard C library,
                      9: #   as well as the socket and inet libraries, if they are present.
                     10: #   If extra libraries are required, they are added to LIBS.
                     11: #   If no getaddrinfo function is found, it is added to LIBOBJS.
                     12: #   Note: Tru64 UNIX contains two versions of getaddrinfo and we must
                     13: #   include netdb.h to get the proper definition.
                     14: #
                     15: # LICENSE
                     16: #
                     17: #   Placed in the public domain by Todd C. Miller on November 20, 2013.
                     18: #
                     19: 
                     20: AC_DEFUN([AX_FUNC_GETADDRINFO],
                     21: [AC_MSG_CHECKING(for getaddrinfo)
                     22: AC_CACHE_VAL(ax_cv_func_getaddrinfo,
                     23: [AC_LINK_IFELSE([AC_LANG_SOURCE([[#include <sys/types.h>
                     24: #include <sys/socket.h>
                     25: #include <netdb.h>
                     26: int main() { return getaddrinfo(0, 0, 0, 0); }]])], [ax_cv_func_getaddrinfo=yes], [ax_cv_func_getaddrinfo=no])])
                     27: AC_MSG_RESULT([$ax_cv_func_getaddrinfo])
                     28: if test X"$ax_cv_func_getaddrinfo" = X"yes"; then
                     29:     AC_DEFINE(HAVE_GETADDRINFO, 1, [Define to 1 if you have the `getaddrinfo' function.])
                     30: else
                     31:     # Not found in libc, check libsocket and libinet
                     32:     _found=no
                     33:     for _libs in "-lsocket" "-linet" "-lsocket -lnsl"; do
                     34:        _cv="ax_cv_lib_getaddrinfo`echo \"$_libs\"|sed -e 's/-l/_/g' -e 's/ *//g'`"
                     35:        AC_MSG_CHECKING([for getaddrinfo in $_libs])
                     36:        AC_CACHE_VAL([$_cv], [
                     37:            _nlibs=
                     38:            for _l in $_libs; do
                     39:                case "$LIBS" in
                     40:                    *"$_l"*)    ;;
                     41:                    *)          _nlibs="$_nlibs $_l";;
                     42:                esac
                     43:            done
                     44:            _libs="${_nlibs# }"
                     45:            if test -z "$_libs"; then
                     46:                # No new libs to check
                     47:                eval $_cv=no
                     48:            else
                     49:                AX_FUNC_GETADDRINFO_OLIBS="$LIBS"
                     50:                LIBS="$LIBS $_libs"
                     51:                AC_LINK_IFELSE([AC_LANG_SOURCE([[#include <sys/types.h>
                     52:     #include <sys/socket.h>
                     53:     #include <netdb.h>
                     54:     int main() { return getaddrinfo(0, 0, 0, 0); }]])], [eval $_cv=yes], [eval $_cv=no])
                     55:                LIBS="$AX_FUNC_GETADDRINFO_OLIBS"
                     56:            fi
                     57:        ])
                     58:        if eval test \$$_cv = "yes"; then
                     59:            AC_MSG_RESULT([yes])
                     60:            AC_DEFINE(HAVE_GETADDRINFO)
                     61:            test -n "$_libs" && LIBS="$LIBS $_libs"
                     62:            break
                     63:        fi
                     64:        AC_MSG_RESULT([no])
                     65:     done
                     66:     if eval test \$$_cv != "yes"; then
                     67:        AC_LIBOBJ(getaddrinfo)
                     68:     fi
                     69: fi
                     70: ])