Hello,
I am trying to compile for wasm with emscripten but there seems to be no
'strdup' C standard function.
```
src/token.c:169:10: error: use of undeclared identifier 'strdup'; did you
mean 'strupr'?
169 | .str = strdup(str),
| ^~~~~~
| strupr
/Users/x/emsdk/upstream/emscripten/cache/sysroot/include/compat/string.h:9:14:
note: 'strupr' declared here
9 | extern char* strupr(char *);
| ^
1 error generated.
emcc: error: '/Users/x/emsdk/upstream/bin/clang -target
wasm64-unknown-emscripten -fignore-exceptions -mno-bulk-memory
-mno-bulk-memory-opt -mno-nontrapping-fptoint -mllvm
-combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm
-disable-lsr --sysroot=/Users/x/emsdk/upstream/emscripten/cache/sysroot
-DEMSCRIPTEN -Werror=implicit-function-declaration -Xclang
-iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat
-Iexternal/lz4/lib -std=c23 -Wall -Wextra src/token.c -c -o
/var/folders/7x/khcwdw3d39g8c3k03mcrcw3r0000gn/T/emscripten_temp_u3yctg1o/token_1.o'
failed (returned 1)
```
Is this C23 standard not supported yet or am I missing something?
I know I can implement it myself easily (that what I am currently doing as
workaround), but less code and #ifdefs the better :)
Regards,
Urjasvi Suthar
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