Added LLVM instructions

Author: iCMDdev

rpi4b-blink/README.md

@@ -6,6 +6,7 @@
 
 - A Raspberry Pi 4B board
 - An SD Card, with a Raspberry Pi OS installed (this way, we don't need to create the configuration files from scratch). You may backup `kernel8.img` and `config.txt` if you need the Linux install later, since we will change these files.
+- LLVM installed (`brew install llvm`) and added to PATH. This is needed to convert the resulted ELF file to binary image format using `llvm-objcopy`.
 
 ## How to build and run this example:
 

rpi4b-blink/build.sh

@@ -2,7 +2,7 @@
 
 SWIFT_EXEC=${SWIFT_EXEC:-`xcrun -f swift`}
 CLANG=${CLANG:-`xcrun -f clang`}
-LLVM_OBJCOPY=/opt/homebrew/opt/llvm@17/bin/llvm-objcopy #${LLVM_OBJCOPY:-`xcrun -f llvm-objcopy`}
+LLVM_OBJCOPY=${LLVM_OBJCOPY:-`xcrun -f llvm-objcopy`}
 
 echo "🛠️  Building with Swift Package Manager... "
 

rpi5-blink/README.md

@@ -6,6 +6,7 @@
 
 - A Raspberry Pi 5 board
 - An SD Card, with a Raspberry Pi OS installed (this way, we don't need to create the configuration files from scratch). You may backup `kernel8.img` and `kernel_2712.img` if you need the Linux install later, since we will change these files.
+- LLVM installed (`brew install llvm`) and added to PATH. This is needed to convert the resulted ELF file to binary image format using `llvm-objcopy`.
 
 ## How to build and run this example:
 

rpi5-blink/build.sh

@@ -2,7 +2,7 @@
 
 SWIFT_EXEC=${SWIFT_EXEC:-`xcrun -f swift`}
 CLANG=${CLANG:-`xcrun -f clang`}
-LLVM_OBJCOPY=/opt/homebrew/opt/llvm@17/bin/llvm-objcopy #${LLVM_OBJCOPY:-`xcrun -f llvm-objcopy`}
+LLVM_OBJCOPY=${LLVM_OBJCOPY:-`xcrun -f llvm-objcopy`}
 
 echo "🛠️  Building with Swift Package Manager... "