Version defines for Emscripten 5.0.0 gives 4.0.24

[nzeemin]

Version defines for Emscripten 5.0.0 gives 4.0.24:
__EMSCRIPTEN_major__ == 4, should be 5
__EMSCRIPTEN_minor__ == 0
__EMSCRIPTEN_tiny__ == 24, should be 0

Version of emscripten/emsdk:

emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 5.0.0 (a7c5deabd7c88ba1c38ebe988112256775f944c6)
clang version 23.0.0git (https:/github.com/llvm/llvm-project 358db292cc6a9a8a5448a296f643312289f328d7)                                                                                                
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: C:\bin\emsdk\upstream\bin

Failing command line in full:
No fail

Full link command and output with -v appended:
Any emcc call.

#define STRINGIZE(_x) STRINGIZE_(_x)
#define STRINGIZE_(_x) #_x
...
        printf("built with Emscripten "
                STRINGIZE(__EMSCRIPTEN_major__) "." STRINGIZE(__EMSCRIPTEN_minor__) "." STRINGIZE(__EMSCRIPTEN_tiny__)
                " at " __DATE__ "\n");

gives:

built with Emscripten 4.0.24 at Feb  7 2026

[kleisauke]

Triage: it appears the cached include/emscripten/version.h is out of date. As a workaround, clearing the cache and rebuilding the sysroot (emcc --clear-cache && embuilder build sysroot --force) resolves this.

$ cat $EMSDK/upstream/emscripten/cache/sysroot/include/emscripten/version.h 
/* Automatically generated by tools/system_libs.py */
#define __EMSCRIPTEN_major__ 4
#define __EMSCRIPTEN_minor__ 0
#define __EMSCRIPTEN_tiny__ 24
$ emcc --clear-cache && embuilder build sysroot --force
$ cat $EMSDK/upstream/emscripten/cache/sysroot/include/emscripten/version.h 
/* Automatically generated by tools/system_libs.py */
#define __EMSCRIPTEN_major__ 5
#define __EMSCRIPTEN_minor__ 0
#define __EMSCRIPTEN_tiny__ 0