07-04-2011
Quote:
but looks like make, unlike shell, literally just take the entire `grep ...` as the variable value.
It does, but will evaluate the backticks when you use it.
Quote:
but it seems that the "export" command does not set the $VERSION value.
Shell lines in a makefile are executed individually and separately. exporting something won't do a thing to any other line.
10 More Discussions You Might Find Interesting
1. Programming
I need to find out where a usb flash memory drive is mounted. I have used prtconf and iostat to find the information and then used popen to parse the information to find what i need. I am wondering if there are some generic functions such as ddi_ or usb_ that i can use to find such info. I would... (1 Reply)
Discussion started by: jtcoelho
1 Replies
2. Shell Programming and Scripting
Hello
I have compilation directory structure the top level Makefile is the one that contains all the sub directories
I want to set in this Makefile env variable say : setenv OPTIMIZATION_LEVEL "1"
and when all the sub directories done compiling it will set this variable to different lavel... (0 Replies)
Discussion started by: umen
0 Replies
3. Shell Programming and Scripting
Hi,
I want to append some compiler flags to CFLAGS_LOCAl variable defined in one makefile.
I am trying to append required flags in another makefile like this:
CFALGS_LOCAL = $(CFLAGS_LOCAL) +check=all
but when I make, I get the error:
../../../../rules/target.rules:4: *** Recursive... (2 Replies)
Discussion started by: prits31
2 Replies
4. UNIX for Advanced & Expert Users
Hi, I'm trying to run the module load command in a Makefile and i'm getting the following error:
make: module: command not found
Why is this? Is there any way to run this command in a Makefile?
NOTE: command - module load msjava/sunjdk/1.5.0 works fine outside of the Makefile (2 Replies)
Discussion started by: hernandinho
2 Replies
5. Programming
Greetings!
Basically, I would like to properly handle this with gnu make:
alltools: my_tool mysecond_tool mythird_tool etc_tool
%_tool: dir1/%_tool.vf dir2/%_tool/subdir2/%_tool.ver
<tab>@echo done
%.vf:
<tab>RUN_VF $*
%.ver:
<tab>RUN_VER $*
So, if I were to do something like:... (0 Replies)
Discussion started by: Harlinator
0 Replies
6. Solaris
Hi,
I have a small piece of Makefile script which throw's error on Sun Sparc machine, but works fine with Sun Optron, Linux, AIX machines.
FOO=Naveen
test1:FOO=Dhilip
test1:
@echo FOO is ${FOO}
test2:
@echo Me is ${FOO}
Output on Sun Sparc -
ukhml-v890new-~/test: make test1... (5 Replies)
Discussion started by: nsriram
5 Replies
7. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Basically, the prompt is make a makefile with various sub makefiles in their respective subdirectories. All code... (1 Reply)
Discussion started by: Tatl
1 Replies
8. Shell Programming and Scripting
Hello guys,
I could use advise from more experienced guys about my Makefile. In short, the problem with my Makefile is that $< doesnt change
inside my rule.
Here is my Makefile:
# Makefile for CORE
CC = gcc.exe
AS = as.exe
AR = ar.exe
INCLUDE = \
-I../lib/tomcrypt/inc \... (1 Reply)
Discussion started by: Kodreanu
1 Replies
9. Shell Programming and Scripting
Hi everybody,
I have a Makefile where I need to use an environment variable that I set, MYBUILDPATH. The variable can be different depending on the computer, but it always ends with /myBuildRoot/data_tables. Sometimes the data_tables directory will have a slash after it, sometimes not, depending... (2 Replies)
Discussion started by: Zel2008
2 Replies
10. UNIX for Advanced & Expert Users
Hi,
I am using screen utility for protecting from ssh disconnects.
My process flow i ssomething like :
a) I start screen from my desktop terminl.
b)In the screen session, i ssh to one host and execute a command
c)Once the above command is completed,i would like to exit via ctr-a or... (4 Replies)
Discussion started by: pandeesh
4 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS
--debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)