AS_EXIT, optimization

[Pavel Roskin]

Hello!

As requested.

ChangeLog:
        * m4sh.m4 (AS_EXIT): Use "false" for exit code 1, ":" for 0.
        * acgeneral.m4 (AC_MSG_ERROR): Don't use m4_default for the
        second argument - AS_EXIT takes care of it.

Regards,
Pavel Roskin

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Index: acgeneral.m4
--- acgeneral.m4        Mon Oct 30 09:39:35 2000
+++ acgeneral.m4        Mon Oct 30 10:03:33 2000
@@ -2794,7 +2794,7 @@
 define([AC_MSG_ERROR],
 [{ _AC_ECHO([configure:__oline__: error: $1], AC_FD_LOG)
   _AC_ECHO([configure: error: $1], 2)
-  AS_EXIT([m4_default([$2], 1)]); }])
+  AS_EXIT([$2]); }])
 
 
 # AU::AC_CHECKING(FEATURE)
Index: m4sh.m4
--- m4sh.m4     Mon Oct 30 09:39:35 2000
+++ m4sh.m4     Mon Oct 30 10:33:06 2000
@@ -106,8 +106,13 @@
 # We cannot simply use "exit N" because some shells (zsh and Solaris sh)
 # will not set $? to N while running the code set by "trap 0"
 # So we set $? by executing "exit N" in the subshell and then exit.
+# "false" is used for exit code 1 (default), ":" is used for 0
 define([AS_EXIT],
-[{ (exit m4_default([$1], 1)); exit; }])
+[{ m4_case([$1],
+           0, [:; exit],
+           [], [false; exit],
+           1, [false; exit],
+           [(exit $1); exit]) }])
 
 
 
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