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Top Forums Shell Programming and Scripting [bash] command line substitution with environmental variables Post 302401725 by ASGR on Sunday 7th of March 2010 09:14:51 PM
Old 03-07-2010
bash dynamic variables

For future reference, this is an approximate
representation of the system so far. The method
suggested works and generates identical output
whilst processing.

I may have been overwhelmed with a working
system that I may have began to think a little
too far ahead with the possibilities when trying
to incorporate it into a function. However, I
still think it *might* be of some interest.

Code:
#!/bin/bash

declare -a FLAGS
FLAGS[0]="CFLAGS=\"-arch x86_64 -g -Os -pipe -no-cpp-precomp\""
FLAGS[1]="LDFLAGS=\"-arch x86_64 -bind_at_load\""

declare -a OPTION
OPTION[0]="./configure"
OPTION[1]="--bindir=/usr/local/bin"
OPTION[2]="--datarootdir=/usr/local/share"
OPTION[3]="--mandir=/usr/local/man"

declare -a CONFIG
declare do_flags=true

## check if array is not null
if [ -n "${FLAGS}" ]; then
## check if flags prefix ./configure
    if $do_flags
        then CONFIG=( "${FLAGS[@]}" )
        fi
        fi

## append options to array
CONFIG=( "${CONFIG[@]}" "${OPTION[@]}" )

## check contents of array
echo "${CONFIG[@]}"
## execute contents of array (disabled)
## eval "${CONFIG[@]}"

## check dynamic variables
eval "${FLAGS[@]}"
echo "CFLAGS=$CFLAGS"
echo "LDFLAGS=$LDFLAGS"

 

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UUID-CONFIG(1)						   Universally Unique Identifier					    UUID-CONFIG(1)

NAME
uuid-config - OSSP uuid API build utility VERSION
OSSP uuid 1.6.2 (04-Jul-2008) SYNOPSIS
uuid-config [--help] [--version] [--all] [--prefix] [--exec-prefix] [--bindir] [--libdir] [--includedir] [--mandir] [--datadir] [--acdir] [--cflags] [--ldflags] [--libs] DESCRIPTION
The uuid-config program is a little helper utility for easy configuring and building applications based on the uuid(3) library. It can be used to query the C compiler and linker flags which are required to correctly compile and link the application against the uuid(3) library. OPTIONS
uuid-config accepts the following options: --help Prints the short usage information. --version Prints the version number and date of the installed uuid(3) library. --all Forces the output of all flags, that is, including extra flags which are not OSSP uuid specific. --prefix Prints the installation prefix of architecture independent files --exec-prefix Prints the installation prefix of architecture dependent files. --bindir Prints the installation directory of binaries. --libdir Prints the installation directory of libraries. --includedir Prints the installation directory of include headers. --mandir Prints the installation directory of manual pages. --datadir Prints the installation directory of shared data. --acdir Prints the installation directory of autoconf data. --cflags Prints the C compiler flags which are needed to compile the uuid(3)-based application. The output is usually added to the CFLAGS uuidiable of the applications Makefile. --ldflags Prints the linker flags (-L) which are needed to link the application with the uuid(3) library. The output is usually added to the LDFLAGS uuidiable of the applications Makefile. --libs Prints the library flags (-l) which are needed to link the application with the C uuid(3) library. The output is usually added to the LIBS uuidiable of the applications Makefile. EXAMPLE
CC = cc CFLAGS = -O `uuid-config --cflags` LDFLAGS = `uuid-config --ldflags` LIBS = -lm `uuid-config --libs` all: foo foo: foo.o $(CC) $(LDFLAGS) -o foo foo.o $(LIBS) foo.o: foo.c $(CC) $(CFLAGS) -c foo.c SEE ALSO
uuid(3), uuid(1), OSSP::uuid(3). 04-Jul-2008 OSSP uuid 1.6.2 UUID-CONFIG(1)
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