Sounds like they could use some help with their code. If you want to
make your own version of a function like abs that behaves differently to
the stdlib one, defining a macro with the same name is not the way to go
about it. It's likely to misbehave regardless of which compiler you use,
just because of the way C preprocessing works.
Have you tried just compiling with clang and seeing what happens?
- Josh
On 2016-4-2 18:04 , Mark Brethen wrote:
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 <http://configure.cc> macports-gcc-4.9
On Apr 1, 2016, at 11:59 PM, Ryan Schmidt <ryandes...@macports.org
<mailto:ryandes...@macports.org>> wrote:
On Apr 1, 2016, at 23:03, Mark Brethen <mark.bret...@gmail.com
<mailto:mark.bret...@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
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