MAKE and its macros and variables Post: 302187125

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Top Forums UNIX for Dummies Questions & Answers MAKE and its macros and variables Post 302187125 by era on Saturday 19th of April 2008 10:23:01 AM

04-19-2008

Registered User

I don't think you can mix shell and make like that. You can use Make's own constructs for referring to Make's own variables, but by the time the shell actually parses and executes the for loop, things are handled by the shell, and there's no way for that to refer back to Make's internal variables.

Some makes will allow you to export variables to the shell, but this is still going to be rather hard to read, understand, and debug.

Or, you could invoke Make recursively with yet more variables assigned to tell Make which actual variables to use on this invocation. Still more complexity.

Code:

target:
	for system in $(SYSTEM); do $(MAKE) SYS=$$system subtarget; done
subtarget:
	ftp_host=$($(SYS)_FTP_HOST); ... etc

For GNU Make, I could suggest some alternate approaches, but for standard make, I'd just break down and code the whole thing as a shell script, or copy+paste for each SYSTEM.

PS. Please use code tags for legibility.

Last edited by era; 04-19-2008 at 11:30 AM.. Reason: Post brief example; point out [CODE] tags

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LEARN ABOUT NETBSD

dh_auto_build

DH_AUTO_BUILD(1)                                                     Debhelper                                                    DH_AUTO_BUILD(1)

NAME

       dh_auto_build - automatically builds a package

SYNOPSIS

       dh_auto_build [buildsystemoptions] [debhelperoptions] [--params]

DESCRIPTION

       dh_auto_build is a debhelper program that tries to automatically build a package. It does so by running the appropriate command for the
       build system it detects the package uses. For example, if a Makefile is found, this is done by running make (or MAKE, if the environment
       variable is set). If there's a setup.py, or Build.PL, it is run to build the package.

       This is intended to work for about 90% of packages. If it doesn't work, you're encouraged to skip using dh_auto_build at all, and just run
       the build process manually.

OPTIONS

       See "BUILD SYSTEM OPTIONS" in debhelper(7) for a list of common build system selection and control options.

       -- params
           Pass params to the program that is run, after the parameters that dh_auto_build usually passes.

SEE ALSO

       debhelper(7)

       This program is a part of debhelper.

AUTHOR

       Joey Hess <joeyh@debian.org>

11.1.6ubuntu2                                                       2018-05-10                                                    DH_AUTO_BUILD(1)

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