Using MacPorts gcc14 (stdio.h trouble error: unknown type name 'FILE)

[Chris Jones]

Hi,

Looks like its this

https://github.com/iains/gcc-14-branch/issues/7

Basically, GCC is sensitive to the SDK it was built against. Looks like 
you are likely using the binary install of gcc14 on macOS14, which would 
have been built using the macOS14 SDK, but you are giving it the macOS15 
SDK. This is known to have problems, see the above.

You need to match SDKs. So either build GKlib using macOS14 SDK, or 
rebuild locally your gcc14 port against macOS15 SDK.

Or just use clang, which is anyway the defacto default C(C++) compiler 
on macOS.

Chris


On 12/02/2025 9:46 pm, Gerben Wierda wrote:
> I am trying to compile a library (GKlib) with MacPorts gcc14 on Sonoma 
> 14.7,3. MacPorts is up to date
> 
> 
> I have set thing sup with
> 
> git clone https://github.com/KarypisLab/GKlib.git <https://github.com/ 
> KarypisLab/GKlib.git>
> 
> cd GKlib
> 
> make config cc=gcc-mp-14 prefix=../GKlibInstall
> 
> make
> 
> 
> /opt/local/bin/gcc-mp-14  -I/Users/gerben/RenskeDev/Leon/fromsource/ 
> GKlib/. -I/Users/gerben/RenskeDev/Leon/fromsource/GKlib/test -DLINUX - 
> D_FILE_OFFSET_BITS=64 -std=c99 -fno-strict-aliasing -march=native -fPIC 
> -Werror -Wall -pedantic -Wno-unused-function -Wno-unused-but-set- 
> variable -Wno-unused-variable -Wno-unknown-pragmas -Wno-unused-label - 
> DNDEBUG -DNDEBUG2 -DHAVE_EXECINFO_H -DHAVE_GETLINE -O3 -isysroot / 
> Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/ 
> Developer/SDKs/MacOSX15.2.sdk -mmacosx-version-min=14.7 -MD -MT 
> CMakeFiles/GKlib.dir/b64.c.o -MF CMakeFiles/GKlib.dir/b64.c.o.d -o 
> CMakeFiles/GKlib.dir/b64.c.o -c /Users/gerben/RenskeDev/Leon/fromsource/ 
> GKlib/b64.c
> 
> In file included from */Users/gerben/RenskeDev/Leon/fromsource/GKlib/ 
> GKlib.h:32*,
> 
>                   from */Users/gerben/RenskeDev/Leon/fromsource/GKlib/ 
> b64.c:20*:
> 
> */opt/local/lib/gcc14/gcc/x86_64-apple-darwin23/14.2.0/include-fixed/ 
> stdio.h:83:8:* *error: *unknown type name '*FILE*'
> 
>     83 | extern *FILE**__stdinp;
> 
>        | *^~~~*
> 
> *
> *
> 
> A test file in the directory above compiles fine. I’ve seen messages 
> with this kind of trouble but I don’t understand exactly where this is 
> going wrong.
> 
> 
> */opt/local/lib/gcc14/gcc/x86_64-apple-darwin23/14.2.0/include-fixed/ 
> stdio.h* starts with:
> 
> #ifndef _STDIO_H_
> 
> #define _STDIO_H_
> 
> 
> #include <_stdio.h>
> 
> 
> #include <sys/_types/_seek_set.h>
> 
> 
> __BEGIN_DECLS
> 
> extern FILE *__stdinp;
> 
> 
> When testing with the test file, the culprit seems to be
> 
> 
>   -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/ 
> MacOSX.platform/Developer/SDKs/MacOSX15.2.sdk
> 
> 
> It’s been far too long I have been doing stuff like this, so I could use 
> tips.
> 
> 
> Thanks,
> 
> 
> G
>