compiling ports with --sysroot= and -isystem

olli hauer ohauer at
Fri Apr 22 03:12:48 UTC 2016

On 2016-04-22 04:04, Julian Elischer wrote:
> How can I add entries (like the above) to a port compile?
> I want to ADD things to CFLAGS.
> If I add 'CFLAGS=...' to the build (for example, of lsof)  it actually replaces all the CFLAGS already there.
> lsof (as the example) uses configure, so I would need to feed the added stuff into configure. Is there a standard way to do this?
> In the environment I'm using, I'm building for a machine that is not the build machine, but an appliance.
> It has a small number of differences in the include file contents, so I want it to compile using a different set of includes than those in /usr/include.
> On the other hand I'm building a bunch of tools that do have t orun on the build machine and they need to use the regular /usr/include so I don't really want to replace them..
> Julian
> p.s. usual "please reply directly" comment applies.. I'm on this list but get it in digest form..

Use the '+=' notation, e.g.

# Makefile
CFLAGS+=	"--sysroot=...."


More information about the freebsd-ports mailing list