GCC doesn't seem to work with the macOS 15.1 SDK on macOS 14.7

[szhorvat (Szabolcs Horvát)]

I am using macOS 14.7, and can't upgrade to 15 yet. I have Xcode 16.1 (which auto-updated). MacPorts's GCC does not seem to work correctly when using the macOS 15.1 SDK. This SDK is selected automatically when using CMake.

Example C code:

// x.c

#include <stdio.h>

int main(void) { return 0; }

Compiling like this works:

gcc-mp-14 x.c

This does not work (see error at the end):

gcc-mp-14 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.1.sdk x.c

I am not adding the -isysroot option myself. This is done automatically by CMake. Thus I cannot compile CMake-based projects with MacPorts's GCC.

Is this a known issue, and is there any fix?

The problem is present both with gcc14 and gcc13. I did not try other versions.

Here's the error:

In file included from x.c:1:
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:83:8: error: unknown type name 'FILE'
   83 | extern FILE *__stdinp;
      |        ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:81:1: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
   80 | #include <sys/_types/_seek_set.h>
  +++ |+#include <stdio.h>
   81 | 
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:84:8: error: unknown type name 'FILE'
   84 | extern FILE *__stdoutp;
      |        ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:84:8: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:85:8: error: unknown type name 'FILE'
   85 | extern FILE *__stderrp;
      |        ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:85:8: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:148:19: error: unknown type name 'FILE'
  148 | void     clearerr(FILE *);
      |                   ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:148:19: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:149:17: error: unknown type name 'FILE'
  149 | int      fclose(FILE *);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:149:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:150:15: error: unknown type name 'FILE'
  150 | int      feof(FILE *);
      |               ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:150:15: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:151:17: error: unknown type name 'FILE'
  151 | int      ferror(FILE *);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:151:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:152:17: error: unknown type name 'FILE'
  152 | int      fflush(FILE *);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:152:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:153:16: error: unknown type name 'FILE'
  153 | int      fgetc(FILE *);
      |                ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:153:16: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:154:18: error: unknown type name 'FILE'
  154 | int      fgetpos(FILE * __restrict, fpos_t *);
      |                  ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:154:18: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:154:37: error: unknown type name 'fpos_t'
  154 | int      fgetpos(FILE * __restrict, fpos_t *);
      |                                     ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:154:37: note: 'fpos_t' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:155:40: error: unknown type name 'FILE'
  155 | char    *fgets(char * __restrict, int, FILE *);
      |                                        ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:155:40: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:159:1: error: unknown type name 'FILE'
  159 | FILE    *fopen(const char * __restrict __filename, const char * __restrict __mode) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_2_0, __DARWIN_ALIAS(fopen));
      | ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:159:1: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:161:18: error: unknown type name 'FILE'
  161 | int      fprintf(FILE * __restrict, const char * __restrict, ...) __printflike(2, 3);
      |                  ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:161:18: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:162:21: error: unknown type name 'FILE'
  162 | int      fputc(int, FILE *);
      |                     ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:162:21: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:163:41: error: unknown type name 'FILE'
  163 | int      fputs(const char * __restrict, FILE * __restrict) __DARWIN_ALIAS(fputs);
      |                                         ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:163:41: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:164:1: error: unknown type name 'size_t'
  164 | size_t   fread(void * __restrict __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream);
      | ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:81:1: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
   80 | #include <sys/_types/_seek_set.h>
  +++ |+#include <stddef.h>
   81 | 
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:164:41: error: unknown type name 'size_t'
  164 | size_t   fread(void * __restrict __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream);
      |                                         ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:164:41: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:164:56: error: unknown type name 'size_t'
  164 | size_t   fread(void * __restrict __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream);
      |                                                        ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:164:56: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:164:73: error: unknown type name 'FILE'
  164 | size_t   fread(void * __restrict __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream);
      |                                                                         ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:164:73: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:165:1: error: unknown type name 'FILE'
  165 | FILE    *freopen(const char * __restrict, const char * __restrict,
      | ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:165:1: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:166:18: error: unknown type name 'FILE'
  166 |                  FILE * __restrict) __DARWIN_ALIAS(freopen);
      |                  ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:166:18: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:167:17: error: unknown type name 'FILE'
  167 | int      fscanf(FILE * __restrict, const char * __restrict, ...) __scanflike(2, 3);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:167:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:168:16: error: unknown type name 'FILE'
  168 | int      fseek(FILE *, long, int);
      |                ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:168:16: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:169:18: error: unknown type name 'FILE'
  169 | int      fsetpos(FILE *, const fpos_t *);
      |                  ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:169:18: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:169:32: error: unknown type name 'fpos_t'
  169 | int      fsetpos(FILE *, const fpos_t *);
      |                                ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:169:32: note: 'fpos_t' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:170:16: error: unknown type name 'FILE'
  170 | long     ftell(FILE *);
      |                ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:170:16: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:171:1: error: unknown type name 'size_t'
  171 | size_t   fwrite(const void * __restrict __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream) __DARWIN_ALIAS(fwrite);
      | ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:171:1: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:171:48: error: unknown type name 'size_t'
  171 | size_t   fwrite(const void * __restrict __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream) __DARWIN_ALIAS(fwrite);
      |                                                ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:171:48: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:171:63: error: unknown type name 'size_t'
  171 | size_t   fwrite(const void * __restrict __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream) __DARWIN_ALIAS(fwrite);
      |                                                               ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:171:63: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:171:80: error: unknown type name 'FILE'
  171 | size_t   fwrite(const void * __restrict __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream) __DARWIN_ALIAS(fwrite);
      |                                                                                ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:171:80: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:172:15: error: unknown type name 'FILE'
  172 | int      getc(FILE *);
      |               ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:172:15: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:184:20: error: unknown type name 'FILE'
  184 | int      putc(int, FILE *);
      |                    ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:184:20: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:189:17: error: unknown type name 'FILE'
  189 | void     rewind(FILE *);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:189:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:191:17: error: unknown type name 'FILE'
  191 | void     setbuf(FILE * __restrict, char * __restrict);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:191:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:192:18: error: unknown type name 'FILE'
  192 | int      setvbuf(FILE * __restrict, char * __restrict, int, size_t);
      |                  ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:192:18: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:192:61: error: unknown type name 'size_t'
  192 | int      setvbuf(FILE * __restrict, char * __restrict, int, size_t);
      |                                                             ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:192:61: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:203:1: error: unknown type name 'FILE'
  203 | FILE    *tmpfile(void);
      | ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:203:1: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:213:22: error: unknown type name 'FILE'
  213 | int      ungetc(int, FILE *);
      |                      ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:213:22: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:214:19: error: unknown type name 'FILE'
  214 | int      vfprintf(FILE * __restrict, const char * __restrict, __gnuc_va_list) __printflike(2, 0);
      |                   ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:214:19: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:242:1: error: unknown type name 'FILE'
  242 | FILE    *fdopen(int, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_2_0, __DARWIN_ALIAS(fdopen));
      | ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:242:1: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:244:17: error: unknown type name 'FILE'
  244 | int      fileno(FILE *);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:244:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:255:17: error: unknown type name 'FILE'
  255 | int      pclose(FILE *) __swift_unavailable("Use posix_spawn APIs or NSTask instead. (On iOS, process spawning is unavailable.)");
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:255:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:259:1: error: unknown type name 'FILE'
  259 | FILE    *popen(const char *, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_2_0, __DARWIN_ALIAS(popen)) __swift_unavailable("Use posix_spawn APIs or NSTask instead. (On iOS, process spawning is unavailable.)");
      | ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:259:1: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:274:17: error: unknown type name 'FILE'
  274 | int     __srget(FILE *);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:274:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:275:20: error: unknown type name 'FILE'
  275 | int     __svfscanf(FILE *, const char *, __gnuc_va_list) __scanflike(2, 0);
      |                    ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:275:20: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:276:22: error: unknown type name 'FILE'
  276 | int     __swbuf(int, FILE *);
      |                      ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:276:22: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:285:44: error: unknown type name 'FILE'
  285 | __header_always_inline int __sputc(int _c, FILE *_p) {
      |                                            ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:285:44: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:311:20: error: unknown type name 'FILE'
  311 | void     flockfile(FILE *);
      |                    ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:311:20: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:312:23: error: unknown type name 'FILE'
  312 | int      ftrylockfile(FILE *);
      |                       ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:312:23: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:313:22: error: unknown type name 'FILE'
  313 | void     funlockfile(FILE *);
      |                      ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:313:22: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:314:24: error: unknown type name 'FILE'
  314 | int      getc_unlocked(FILE *);
      |                        ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:314:24: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:316:29: error: unknown type name 'FILE'
  316 | int      putc_unlocked(int, FILE *);
      |                             ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:316:29: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:321:15: error: unknown type name 'FILE'
  321 | int      getw(FILE *);
      |               ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:321:15: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:322:20: error: unknown type name 'FILE'
  322 | int      putw(int, FILE *);
      |                    ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:322:20: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:354:17: error: unknown type name 'FILE'
  354 | int      fseeko(FILE * __stream, off_t __offset, int __whence);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:354:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:355:17: error: unknown type name 'FILE'
  355 | off_t    ftello(FILE * __stream);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:355:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:361:44: error: unknown type name 'size_t'
  361 | int      snprintf(char * __restrict __str, size_t __size, const char * __restrict __format, ...) __printflike(3, 4);
      |                                            ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:361:44: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:362:18: error: unknown type name 'FILE'
  362 | int      vfscanf(FILE * __restrict __stream, const char * __restrict __format, __gnuc_va_list) __scanflike(2, 0);
      |                  ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:362:18: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:364:45: error: unknown type name 'size_t'
  364 | int      vsnprintf(char * __restrict __str, size_t __size, const char * __restrict __format, __gnuc_va_list) __printflike(3, 0);
      |                                             ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:364:45: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:379:71: error: expected ',' or ';' before '__OSX_AVAILABLE_STARTING'
  379 | int     dprintf(int, const char * __restrict, ...) __printflike(2, 3) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
      |                                                                       ^~~~~~~~~~~~~~~~~~~~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:380:83: error: expected ',' or ';' before '__OSX_AVAILABLE_STARTING'
  380 | int     vdprintf(int, const char * __restrict, __gnuc_va_list) __printflike(2, 0) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
      |                                                                                   ^~~~~~~~~~~~~~~~~~~~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:381:46: error: unknown type name 'size_t'
  381 | ssize_t getdelim(char ** __restrict __linep, size_t * __restrict __linecapp, int __delimiter, FILE * __restrict __stream) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
      |                                              ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:381:46: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:381:95: error: unknown type name 'FILE'
  381 | ssize_t getdelim(char ** __restrict __linep, size_t * __restrict __linecapp, int __delimiter, FILE * __restrict __stream) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
      |                                                                                               ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:381:95: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:382:45: error: unknown type name 'size_t'
  382 | ssize_t getline(char ** __restrict __linep, size_t * __restrict __linecapp, FILE * __restrict __stream) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
      |                                             ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:382:45: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:382:77: error: unknown type name 'FILE'
  382 | ssize_t getline(char ** __restrict __linep, size_t * __restrict __linecapp, FILE * __restrict __stream) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
      |                                                                             ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:382:77: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:383:1: error: unknown type name 'FILE'
  383 | FILE *fmemopen(void * __restrict __buf, size_t __size, const char * __restrict __mode) __API_AVAILABLE(macos(10.13), ios(11.0), tvos(11.0), watchos(4.0));
      | ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:383:1: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:383:41: error: unknown type name 'size_t'
  383 | FILE *fmemopen(void * __restrict __buf, size_t __size, const char * __restrict __mode) __API_AVAILABLE(macos(10.13), ios(11.0), tvos(11.0), watchos(4.0));
      |                                         ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:383:41: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:384:1: error: unknown type name 'FILE'
  384 | FILE *open_memstream(char **__bufp, size_t *__sizep) __API_AVAILABLE(macos(10.13), ios(11.0), tvos(11.0), watchos(4.0));
      | ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:384:1: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:384:37: error: unknown type name 'size_t'
  384 | FILE *open_memstream(char **__bufp, size_t *__sizep) __API_AVAILABLE(macos(10.13), ios(11.0), tvos(11.0), watchos(4.0));
      |                                     ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:384:37: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:399:17: error: unknown type name 'FILE'
  399 | char    *fgetln(FILE *, size_t *);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:399:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:399:25: error: unknown type name 'size_t'
  399 | char    *fgetln(FILE *, size_t *);
      |                         ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:399:25: note: 'size_t' is defined in header '<stddef.h>'; this is probably fixable by adding '#include <stddef.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:401:17: error: unknown type name 'FILE'
  401 | int      fpurge(FILE *);
      |                 ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:401:17: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:402:20: error: unknown type name 'FILE'
  402 | void     setbuffer(FILE *, char *, int);
      |                    ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:402:20: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:403:21: error: unknown type name 'FILE'
  403 | int      setlinebuf(FILE *);
      |                     ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:403:21: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:410:1: error: unknown type name 'FILE'
  410 | FILE    *funopen(const void *,
      | ^~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:410:1: note: 'FILE' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:413:18: error: unknown type name 'fpos_t'
  413 |                  fpos_t (* _Nullable)(void *, fpos_t, int),
      |                  ^~~~~~
/opt/local/lib/gcc14/gcc/aarch64-apple-darwin23/14.2.0/include-fixed/stdio.h:413:18: note: 'fpos_t' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'

[cjones051073 (Chris Jones)]

GCC does not support mixing SDKs, and the macOS 14 builds where built against SDK 14, so you must use these I am afraid.

[cjones051073 (Chris Jones)]

For more details look at various upstream issues, like

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

Bottom line is currently you cannot build GGC against one major version SDK and then using it (reliably ) against a different one.

If you are having issues with port builds please file specific tickets for those ports. If this is private cmake builds then I am afraid its up to you to fix your builds to use the 14 SDK and not the 15 one.

[szhorvat (Szabolcs Horvát)]

For future readers: A possible workaround when compiling CMake projects is to set the SDKROOT environment variable to /Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk/

It seems that on my system, /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/ points to MacOSX15.sdk. I didn't feel comfortable modifying system files, so I did not test if re-pointing that symlink to MacOSX14.sdk would also work.

[cjones051073 (Chris Jones)]

/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk will always point to the latest SDK any particular CLT installation provides, so if you have one that provides 14 and 15 it is normal it points to 15 and you should not change that. Instead, you should not use these versionless SdK sym link but the specific major versioned one instead.