On Wed, Apr 28, 2010 at 8:29 PM, <[email protected]> wrote:
>
> severip := $(shell /sbin/ifconfig)
>
> all:
> @echo $(serverip)
>
First, check the spelling of "seRverip" very closely.
Secondly, the problem is happening because the ifconfig output contains
special shell characters, which are being expanded inside the "all" recipe
before the shell gets to execute the code. The shell then sees those chars
and chokes.
step...@jareth:~/tmp$ cat Makefile
serverip := $(shell /sbin/ifconfig)
all:
echo $(serverip)
step...@jareth:~/tmp$ make
echo eth0 Link encap:Ethernet HWaddr 00:1d:92:60:ea:e9 UP
BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0
dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0
overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX
bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:28 Base
address:0x6000 lo Link encap:Local Loopback inet
addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:16769
errors:0 dropped:0 overruns:0 frame:0 TX packets:16769 errors:0
dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0
RX bytes:8936678 (8.9 MB) TX bytes:8936678 (8.9 MB) wlan3 Link
encap:Ethernet HWaddr 00:18:e7:34:6c:5a inet addr:192.168.0.136
Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr:
fe80::218:e7ff:fe34:6c5a/64 Scope:Link UP BROADCAST RUNNING
MULTICAST MTU:1500 Metric:1 RX packets:160193 errors:0 dropped:0
overruns:0 frame:0 TX packets:95979 errors:0 dropped:0 overruns:0
carrier:0 collisions:0 txqueuelen:1000 RX
bytes:220564696 (220.5 MB) TX bytes:9354390 (9.3 MB) Interrupt:17
Memory:f9fffc00-f9fffc25
/bin/sh: Syntax error: "(" unexpected
Be aware that the output of ifconfig is very platform-dependent, and parsing
of it tends to break when the script/makefile is tried on another platform.
You might be better of using "ping -c1 $(hostname)" or "nslookup
$(hostname)" and parsing their output (which is formatted more simply).
--
----- stephan beal
http://wanderinghorse.net/home/stephan/
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