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Supressing output from AC_CHECK_DECL
From: |
jcurlmail |
Subject: |
Supressing output from AC_CHECK_DECL |
Date: |
Tue, 8 May 2007 14:46:53 +0200 (CEST) |
Hello,
I'm still trying to figure out how to get around preventing output during the
./configure check and I'm still stuck. I can't seem to find anything relevant
in the M4 manual, or the autoconf manual.
When I use AC_CHECK_DECL, how can I prevent it from outputting to the console
for a specific message only? I don't want to supress all messages, only one
specific message (and replace it with my own, more complex reusable macro).
I've looked at the sources and see it ultimately uses AC_MESSAGE_FD and this is
fixed with a value of 6. There's no magic variables it uses to override this
with /dev/null. I've seen I can override this macro with my own by just
defining a macro of the same name, but I want to only temporarily override it.
I see that m4_pushdef, m4_define, m4_defn, m4_popdef may all help, but being
new to m4, I'm still trying to figure out what the m4 manuals mean.
Alternatively, in 'acgeneral.m4' I see AC_DIVERT_PUSH and wondering if this is
appropriate (I don't see any documentation for this in the autoconf manual).
In the end, I've done:
pushdef([AS_MESSAGE_FD], [/dev/null])
popdef([AS_MESSAGE_FD])
It appears to work. But again, I've not got much experience in this area - can
I expect to see problems, or is there another way that is more portable,
Thanks for your patience,
Jason.
- Supressing output from AC_CHECK_DECL,
jcurlmail <=