sizeof(long) and universal builds

[Mojca Miklavec]

On 1 March 2018 at 20:42, Michael Dickens wrote:
> In the past, I've handled this situation by using the muniversal PortGroup, so that the sizeof is correct for each build independent of the other. - MLD

I'm aware of that. I was wondering if there was some *proper* solution
that could allow compiling just once.

Mojca

> On Thu, Mar 1, 2018, at 2:40 PM, Mojca Miklavec wrote:
>> While checking some patches of a library I decided to try whether the
>> library would build universally. The configure.ac part contains:
>>
>>     AC_COMPILE_CHECK_SIZEOF([long])
>>
>> and that happily fails with
>>
>>     checking size of long... configure: error: cannot determine a size for long
>>
>> when setting
>>
>>     CXXFLAGS="-arch i386 -arch x86_64"
>>
>> What's the correct way to handle universal builds in that respect? Or
>> is it that is simply cannot be done?
>>
>> Thank you,
>>     Mojca
>>
>>
>> PS: here's the relevant commit:
>> https://github.com/gdraheim/zziplib/commit/75ddc796529b191437514be2bbf6a2f561a74a6f