03-Android_SDK_Compilation

SDK Overview

Android SDK Version Information

• Kernel Version: 4.9

• Android OS Version: 10.0

---

Android SDK Compilation

Full Image Compilation

$ cd longan/
$ ./build.sh config

Welcome to mkscript setup progress
All available platforms:
   0. android
   1. linux
Choice [android]: 0
All available ICs:
   0. a133
   1. t509
Choice [a133]: 0
All available boards:
   0. b1
   1. b3
   2. b4
   3. c3
   4. c4
   5. dpf
   6. fpga
   7. perf1
   8. perf2
   9. perf3
  10. qa
  11. ver
Choice [c3]: 3

$ cd -
$ ./build.sh lunch  # Select K5 or K5C based on board type
$ ./build.sh

Output Directory: longan/out/

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Defconfig Configuration

Defconfig Path:

longan/kernel/linux-4.9/arch/arm64/configs/sun50iw10p1smp_a133_android_defconfig

Configuration Commands:

cd longan

# Operations: loadconfig | menuconfig | saveconfig | mergeconfig
./build.sh loadconfig    # Load default configuration
./build.sh menuconfig    # Open interactive menu
./build.sh saveconfig    # Save changes
./build.sh mergeconfig   # Merge configurations

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Fixing yylloc Compilation Errors

Due to differences in compilation environments (e.g., ld versions), yylloc errors may occur. Modify the code as follows based on the error path:

--- a/longan/kernel/linux-4.9/scripts/dtc/dtc-lexer.lex.c
+++ b/longan/kernel/linux-4.9/scripts/dtc/dtc-lexer.lex.c
@@ -631,8 +631,8 @@ char *yytext;
 #include "srcpos.h"
 #include "dtc-parser.tab.h"
 
-//YYLTYPE yylloc;
-extern YYLTYPE yylloc;
+YYLTYPE yylloc;
+//extern YYLTYPE yylloc;

Note: Adjust the file path according to the actual error message.