Merge pull request #8 from maximmaxim345/fix/building-on-sh

fix: building on plain POSIX sh

Author: maximmaxim345

env.bat

@@ -1,10 +1,9 @@
 @echo off
 
 REM Get script directory
-set SCRIPT_DIR=%~dp0
-set SCRIPT_DIR=%SCRIPT_DIR:~0,-1%
+set WASM32_UNKNOWN_UNKNOWN_STDLIB=%~dp0
+set WASM32_UNKNOWN_UNKNOWN_STDLIB=%WASM32_UNKNOWN_UNKNOWN_STDLIB:~0,-1%
 
-set WASM32_UNKNOWN_UNKNOWN_STDLIB=%SCRIPT_DIR%
 set CARGO_TARGET_WASM32_UNKNOWN_UNKNOWN_RUSTFLAGS=-C link-arg=-L%WASM32_UNKNOWN_UNKNOWN_STDLIB%\lib -L %WASM32_UNKNOWN_UNKNOWN_STDLIB%\lib -lstatic=c -lstatic=c++abi --Z wasm_c_abi=spec
 set CFLAGS_wasm32_unknown_unknown=--sysroot=%WASM32_UNKNOWN_UNKNOWN_STDLIB% -D__OpenBSD__ -D__WASM32_UNKNOWN_UNKNOWN__
 set CXXFLAGS_wasm32_unknown_unknown=%CFLAGS_wasm32_unknown_unknown% -fexceptions

env.sh

@@ -1,18 +1,22 @@
 #!/usr/bin/env bash
 
 # Get script directory in a shell-agnostic way
-if [ -n "${BASH_SOURCE[0]}" ]; then
+if [ -n "${BASH_SOURCE}" ]; then
     # bash
-    SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+    WASM32_UNKNOWN_UNKNOWN_STDLIB="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 elif [ -n "$ZSH_VERSION" ]; then
     # zsh
-    SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+    WASM32_UNKNOWN_UNKNOWN_STDLIB="$(cd "$(dirname "$0")" && pwd)"
 else
-    # fallback for sh
-    SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+    # fallback for sh, we can't determine this scripts directory, so we assume the current directory
+    # if it's not, you can set WASM32_UNKNOWN_UNKNOWN_STDLIB_DIR to the correct directory
+    if [ -n "$WASM32_UNKNOWN_UNKNOWN_STDLIB_DIR" ]; then
+        WASM32_UNKNOWN_UNKNOWN_STDLIB="$WASM32_UNKNOWN_UNKNOWN_STDLIB_DIR"
+    else
+        WASM32_UNKNOWN_UNKNOWN_STDLIB="$(pwd)"
+    fi
 fi
 
-export WASM32_UNKNOWN_UNKNOWN_STDLIB=$SCRIPT_DIR
 export CARGO_TARGET_WASM32_UNKNOWN_UNKNOWN_RUSTFLAGS="-C link-arg=-L$WASM32_UNKNOWN_UNKNOWN_STDLIB/lib/ -L $WASM32_UNKNOWN_UNKNOWN_STDLIB/lib/ -lstatic=c -lstatic=c++abi --Z wasm_c_abi=spec"
 export CFLAGS_wasm32_unknown_unknown="--sysroot=$WASM32_UNKNOWN_UNKNOWN_STDLIB -D__OpenBSD__ -D__WASM32_UNKNOWN_UNKNOWN__"
 export CXXFLAGS_wasm32_unknown_unknown="$CFLAGS_wasm32_unknown_unknown -fexceptions"