I've been trying to compile a program that simply prints out "hello world" with the cfg80211.h kernel header, as it is a header that I will be using for another project, so I at least want to know that I can include it in a basic program and that it will compile. However, as it is not found within /usr/include, I have to specify include directories for it and its dependencies, but when I include everything that I need, I end up having the compiler give me syntax errors for most of the included header files, including stdio.h.
Here are a couple of the aforementioned errors:
/usr/include/stdio.h:738:15: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘fread’ 738 | extern size_t fread (void *__restrict __ptr, size_t __size, | ^~~~~/usr/include/stdio.h:745:15: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘fwrite’ 745 | extern size_t fwrite (const void *__restrict __ptr, size_t __size, | ^~~~~~/usr/include/stdio.h:766:15: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘fread_unlocked’ 766 | extern size_t fread_unlocked (void *__restrict __ptr, size_t __size, | ^~~~~~~~~~~~~~/usr/include/stdio.h:769:15: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘fwrite_unlocked’ 769 | extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size, | ^~~~~~~~~~~~~~~So far I've tried:Reinstalling gcc 13, using gcc 14, using clangSetting environment variables via C_INCLUDE_PATHSetting include paths via the -I argument
I thought the -I argument or the C_INCLUDE PATH (That should simply add more include directories the same way that /usr/include is already included, according to the documentation) would've worked, but it did not, instead it's what started giving me these compilation issues to begin with.
