remove unused acinclude.m4

acinclude.m4

-dnl @synopsis AX_FUNC_WHICH_GETSPNAM_R
-dnl
-dnl Determines which historical variant of the getspnam_r() call
-dnl (taking four or five arguments) is available on the system
-dnl and sets NEW_SHADOW_API=YES if there are five arguments.
-dnl
-dnl Originally named "AX_FUNC_WHICH_GETHOSTBYNAME_R". Rewritten
-dnl for AX_FUNC_WHICH_GETSPNAM_R
-dnl
-dnl @author Caolan McNamara <caolan@skynet.ie>
-dnl @author Daniel Richard G. <skunk@iskunk.org>
-dnl @version 2006-05-01
-dnl @license LGPL
-
-AC_DEFUN([AX_FUNC_WHICH_GETSPNAM_R], [
-
-    AC_LANG_PUSH(C)
-    AC_MSG_CHECKING([how many arguments getspnam_r() takes])
-
-    AC_CACHE_VAL(ac_cv_func_which_getspnam_r, [
-
-################################################################
-
-ac_cv_func_which_getspnam_r=unknown
-
-#
-# ONE ARGUMENT (sanity check)
-#
-
-# This should fail, as there is no variant of getspnam_r() that takes
-# a single argument. If it actually compiles, then we can assume that
-# netdb.h is not declaring the function, and the compiler is thereby
-# assuming an implicit prototype. In which case, we're out of luck.
-#
-AC_COMPILE_IFELSE(
-    AC_LANG_PROGRAM(
-	[[
-	    #include <sys/types.h>
-	    #include <shadow.h>
-	]],
-	[[
-	    const char *name = "myname";
-	    getspnam_r(name) /* ; */
-	]]),
-    ac_cv_func_which_getspnam_r=no)
-
-#
-# FIVE ARGUMENTS
-#
-
-if test "$ac_cv_func_which_getspnam_r" = "unknown"; then
-
-AC_COMPILE_IFELSE(
-    AC_LANG_PROGRAM(
-	[[
-	    #include <sys/types.h>
-	    #include <shadow.h>
-	]],
-	[[
-	    char buffer[[]] = { '\0' };
-	    struct spwd spwdStruct;
-	    const char *name = "myname";
-	    getspnam_r(name, &spwdStruct, buffer, sizeof buffer, 0) /* ; */
-	]]),
-    ac_cv_func_which_getspnam_r=five)
-
-fi
-
-#
-# FOUR ARGUMENTS
-#
-
-if test "$ac_cv_func_which_getspnam_r" = "unknown"; then
-
-AC_COMPILE_IFELSE(
-    AC_LANG_PROGRAM(
-	[[
-	    #include <sys/types.h>
-	    #include <shadow.h>
-	]],
-	[[
-	    char buffer[[]] = { '\0' };
-	    struct spwd spwdStruct;
-	    const char *name = "myname";
-	    getspnam_r(name, &spwdStruct, buffer, sizeof buffer) /* ; */
-	]]),
-    ac_cv_func_which_getspnam_r=four)
-
-fi
-
-################################################################
-
-]) dnl end AC_CACHE_VAL
-
-case "$ac_cv_func_which_getspnam_r" in
-    five)
-    AC_MSG_RESULT([five])
-    NEW_SHADOW_API=YES
-    ;;
-
-    four)
-    AC_MSG_RESULT([four])
-    ;;
-
-    no)
-    AC_MSG_RESULT([cannot find function declaration in shadow.h])
-    ;;
-
-    unknown)
-    AC_MSG_RESULT([can't tell])
-    ;;
-
-    *)
-    AC_MSG_ERROR([internal error])
-    ;;
-esac
-
-AC_LANG_POP(C)
-
-]) dnl end AC_DEFUN