Update wasmCompile.md

docs/wasmCompile.md

@@ -5,7 +5,7 @@
 - `--sysroot` specifying the stand library path
 
 ## Modify stubs.h
-Modify the file `stubs.h` located in `lind-wasm/glibc/target/include/gnu` to
+Modify the file `stubs.h` located in `/home/lind-wasm/glibc/target/include/gnu` to
 
 ```
 /* This file is automatically generated.
@@ -24,6 +24,19 @@ Modify the file `stubs.h` located in `lind-wasm/glibc/target/include/gnu` to
 #endif
 ```
 
+After modifying `stubs.h` remember to run `gen_sysroot.sh` again
+
+```
+cd /home/lind-wasm/glibc
+./gen_sysroot.sh
+```
+
+Then we cd to lind-wasm-tests for testing
+
+```
+cd /home/lind-wasm/lind-wasm-tests
+```
+
 ## Compile C to wasm
 If you don't need to use glibc, modify `add.c` to the c file you want to compile and `add.wasm` is the wasm file you get(you can modify add to the name you want). Modify `/home/clang+llvm-16.0.4-x86_64-linux-gnu-ubuntu-22.04/bin/clang` to you compiler's path