[Dnsmasq-discuss] On a 64bit system, what switches create a 32bit binary.

[Kurt H Maier]

On Mon, Apr 11, 2016 at 10:42:49PM -0500, Rob Townley wrote:
> My name server runs on 32bit hardware, but all other machines are 64bit OS
> on 64bit hardware.
> 
> egrep -R -i '386|x86|32bit' did not come back with much relevant info.
> 
> dnsmasq runs on all kinds of disparate hardware, so i know it is done
> everyday.
> 
> (CentOS6 systems.)

You need to

yum install libc-devel.i686 libgcc.i686 compat-glibc compat-glibc-headers

then you need to edit the Makefile

CFLAGS        = -m32 -Wall -W -O2
LDFLAGS       = -m32

Then you should be able to run 'make' and get a usable build.

To do it properly, you should install the rpm build tools, install the
source rpm for dnsmasq, modify the .spec file to include the above flags
and build-time dependencies, and use rpmbuild to produce the package.

khm