html and postscript viewer

[Mark Brethen]

From their installation guide:

For the compilation of cgx, therefore, the unmodified GCC 4.9 is required because the modified (by Apple) GCC for several reasons is not suitable for the compilation of cgx … The modified GCC includes the individual compilers: gcc (GNU c compiler), g++ and clang. Because the modified GCC has a problem with function overloading it is not suitable for the 2compilation of cgx.

2In particular, the compilation of function: #define abs(x) ((x) >= 0 ? (x) : -(x)) in the cgx-routine: “extUtil.h“ causes a compiler error. A bug fix for the compiler was not available at the time the installation of cgx was tested. 



I have looked at that link but it doesn’t explain how, for example, to set a default compiler. The compilers group gives more instruction, but it’s not completely clear to me. I guess something like

compilers.choose    cc cxx cpp
configure.cc            macports-gcc-4.9


> On Apr 1, 2016, at 11:59 PM, Ryan Schmidt <ryandesign at macports.org> wrote:
> 
>> On Apr 1, 2016, at 23:03, Mark Brethen <mark.brethen at gmail.com <mailto:mark.brethen at gmail.com>> wrote:
>> 
>> I’ve run into a snag building calculix. glut and libSNL are libraries that calculix uses. I set 
>> 
>> "compiler.whitelist      macports-gcc-4.9” 
>> 
>> per the developers instructions.
> 
> Why? We usually do not want to use FSF GCC. 
> 
>> However there isn’t a configure so I’m not sure what else needs to be passed.
>> 
>> subport ${name}-cgx {
>>   revision                0
>>   master_sites            http://www.dhondt.de/
>>   distname                cgx_${version}.all
>> 
>>   checksums               rmd160  02302101f16c2b4cdd570e81986cc4d36c2110d8 \
>>       sha256 64810dab1c22152c7946282fac5763cc36b9e31e309f962c23b8bf8238537c7e
>> 
>>   depends_run-append      port:openbrowser 
>> 
>>   worksrcdir              CalculiX
>>   build.dir               ${worksrcpath}/cgx_${version}/src
>>   build.target            
>> 
>>   compiler.whitelist      macports-gcc-4.9
>> 
>>   patchfiles              patch-cgx-build.diff \
>>       patch-libSNL-build.diff
>>   patch.dir               ${workpath}
>> 
>>   post-patch {
>>       reinplace "s|@@PREFIX@@|${prefix}|g" \
>>           ${worksrcpath}/cgx_${version}/src/cgx.h
>>   }
>> 
>>   use_configure           no
>> 
>> livecheck.regex         {ccx_${version}.all}
>> }
> 
> When you set "use_configure no", you must add code to use the right compiler and -arch flags and offer a universal variant. See:
> 
> https://trac.macports.org/wiki/UsingTheRightCompiler <https://trac.macports.org/wiki/UsingTheRightCompiler>
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