I wonder if this is a result of some recent changes by Erik in detecting system 
packages.
I certainly didn’t design things to have this behaviour when I introduced the 
gfortran
package to complement clang.

François

> On 18/11/2018, at 23:30, Volker Braun <[email protected]> wrote:
> 
> I just upgraded the buildbot to the new OSX version and I can't build Sage 
> any more. I've read the thread about the Mojave dumpster fire and installed 
> command line tools and 
> /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg,
>  so /usr/include is populated. Latest XCode. Compilation fails in GCC as per 
> https://trac.sagemath.org/ticket/26426, but shouldn't we use Xcode clang by 
> default nowadays? Relevant configure output:
> 
> 
> configure: === checking whether to install the gcc SPKG ===
> checking for C++ compiler vendor... clang
> checking whether g++ supports C++11 features by default... no
> checking whether g++ supports C++11 features with -std=gnu++11... yes
> checking for gcc option to accept ISO C99... none needed
> checking if gcc accepts -dumpversion option... yes
> checking gcc version... 4.2.1
> checking if g++ accepts -dumpversion option... yes
> checking g++ version... 4.2.1
> configure: === checking whether to install the git SPKG ===
> checking for git... /usr/bin/git
> checking for a sed that does not truncate output... /usr/bin/sed
> configure: === checking whether to install the patch SPKG ===
> checking for GNU patch >= 2.7.0... no
> configure: === checking whether to install the curl SPKG ===
> checking for curl 7.22... /usr/bin/curl
> checking curl/curl.h usability... yes
> checking curl/curl.h presence... yes
> checking for curl/curl.h... yes
> configure: === checking whether to install the yasm SPKG ===
> checking for yasm supporting the adox instruction... no
> checking for Fortran flag needed to accept free-form source... unknown
> configure: Your Fortran compiler does not accept free-format source code
> configure: which means the compiler is either seriously broken, or
> configure: is too old to build Sage.
> configure: === checking whether to install the gfortran SPKG ===
> configure: Installing GCC because a Fortran compiler is missing
> 
> 
> We all know that OSX doesn't come with a fortran compiler, but that output 
> comes from SAGE_MUST_INSTALL_GCC([a Fortran compiler is missing]) so it 
> forces installing of all of gcc? Shouldn't that just force gfortran 
> installation?
> 
> 
> Not related, but I made https://trac.sagemath.org/ticket/26713 to deal with 
> the /usr/include situation
> 
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