suddenly, "-arch i386" is added and all fails: e.g. libsdl

[ah]

I have just found out that cmake-based builds also have this problem, 
for example: physfs


On 07/03/2020 14:17, ah via macports-users wrote:
> Hi,
> this is on OSX 13.6 (High Sierra) on a macbookpro/2012 (which is an 
> intell 64bit i believe), and XCode 10.1 (build 10861) the last few hours 
> I am experiencing a new kind of failure using macports. A couple of 
> weeks ago I have installed successfully opencv. And none of the problems 
> I describe here arose.
> 
> So,
> 
> Initially I wanted to do: port -s -v install dosbox
> 
> One of its dependencies, "libsdl", failed with lots of symbols undefined 
> (at linking). One of the messages was "ld: warning: ignoring file 
> /Library/Frameworks/AudioUnit.framework/AudioUnit.tbd, missing required 
> architecture i386 in file 
> /Library/Frameworks/AudioUnit.framework/AudioUnit.tbd" then "Undefined 
> symbols for architecture i386: ...[lots of symbols]"
> 
> and the linking command had this in it:
> 
>    -arch i386
> 
> I have traced this to the "configure" file in libsdl's build dir (where 
> macports extracted sources and attempted to build), in the following line:
> 
> /usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
> 
> when I replaced the righ-hand expression with just the string
> x86_64
> 
> all compiled well.
> 
> Prior to this, python 3.7 also had similar problems. And I managed to 
> solve them using the same method with additionally replacing all 
> occurences of "arch -i386" and "extract i386" from configure script also 
> (this is from my memory).
> 
> I have explicitly set :
> export LDFLAGS=
> export CFLAGS=
> export CXXFLAGS=
> before :
> port -v -s libsdl
> 
> btw,
> /bin/uname -p reports i386
> and so is
> /opt/local/libexec/gnubin/uname -p
> 
> whereas
> /bin/uname -m reports x86_64
> 
> Lately, I did install autotools port, perhaps that broke things somehow, 
> not being aware about the osx idiotic "uname -p" reporting i386? *(btw 
> my kernel I believe is 64bit, "About this mac->System 
> report->Software->Extensions->64-0Bit (Intel): YES"
> 
> also :
> 
> uname -a
> reports  x86_64
> 
>