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Full Discussion: Chopping off the last directory in a Makefile variable
Top Forums Shell Programming and Scripting Chopping off the last directory in a Makefile variable Post 302682635 by Zel2008 on Monday 6th of August 2012 02:39:36 PM
Old 08-06-2012
Chopping off the last directory in a Makefile variable
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 on the computer.

What I'm trying to do is get the location of the build root from this variable (with a slash on the end), so something like this:

Code:
MYBUILDPATH=/randomstuff/myBuildRoot/data_tables
MYBUILDROOT=/randomstuff/myBuildRoot/

I've tried calling the shell from the Makefile:

I've tried a lot of things, including:
Code:
MYBUILDROOT=$(shell ${$$MYBUILDPATH%/data_tables})

And using sed, but no luck.

Would anyone mind pointing me in the right direction to figure this out? I'd appreciate any help.

Thanks,
Zel2008
 

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LEARN ABOUT CENTOS

create_makefile

CREATE_MAKEFILE 						  [FIXME: manual]						   CREATE_MAKEFILE

NAME

       create_makefile - Creates Makefile.in and Makefile from a Makefile.am

SYNOPSIS

       create_makefile [relativepath/Makefile] [relativepath]

DESCRIPTION

       create_makefile creates the Makefile.in and Makefile in a subdirectory containing a Makefile.am. This script saves time compared to
       re-running configure completely

       Note that you must supply the path to the desired MakefileMakefile.am (though the final /Makefile may be omitted).

       This script may be run from the toplevel directory (the one containing configure) or from one of it's subdirectories.

       If the source directory is different from the build directory (see the environment variables below), it will be assumed that the
       Makefile.am and Makefile.in belong beneath the source directory and that the Makefile belongs beneath the build directory.

       This utility is part of the KDE Software Development Kit.

ENVIRONMENT

       One of the following variables (but not both) should be set if the source directory is different from the build directory. If the build
       directory is simply a subdirectory of the source directory, the simpler variable OBJ_SUBDIR should be used.

       OBJ_SUBJDIR
	   Indicates that the build directory is in the given subdirectory of the source directory. For instance, if the source directory is
	   kdesdk and the build directory is kdesdk/obj-i386-linux, then OBJ_SUBDIR should be set to obj-i386-linux.

       OBJ_REPLACEMENT
	   A sed expression that is used to transform the source directory into the build directory. For instance, if the source directory is
	   ~/src/kdesdk and the build directory is ~/src/kdesdk-obj, then OBJ_REPLACEMENT should be set to s#kdesdk#kdesdk-obj#.

SEE ALSO

       create_makefiles(1)

AUTHORS

       create_makefile was written by David Faure<faure@kde.org> and others. This manual page was prepared by Ben Burton<bab@debian.org> for the
       Debian GNU/Linux system (but may be used by others).

[FIXME: source] 						   March 8, 2003						   CREATE_MAKEFILE
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