error: package javax.xml.bind does not exist

Try these fixes if you run into issues with javax.xml.bind, which was deprecated and later removed from Java.

----------------------------------------------------------------------

Solution 1 => Switch to Java 8

Please install the latest JDK 8 from oracle for your OS - https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html. If you have the latest Java (version 11/14) installed, you need to also install JDK 8 and use it to run the java code.

Switch to JDK 8 on Linux / macOS:

- Check current java version % java --version, if it is JDK 11/14 then install JDK 8

- Check all JDK versions installed % /usr/libexec/java_home -V

- Edit bash profile % nano ~/.bash_profile

export JAVA_HOME_8=$(/usr/libexec/java_home -v1.8)

export JAVA_HOME_11=$(/usr/libexec/java_home -v11)

export JAVA_HOME_14=$(/usr/libexec/java_home -v14)

[Fix] Free up disk space in macOS

This hack worked for me when I was running low on disk space on my MacBook Pro, stopping me from upgrading to the latest version of Xcode and macOS. Run these quick and easy commands from the macOS terminal to clean system data over 100 GB.

• rm -rf Library/Logs
• rm -rf Library/Caches
• rm -rf System/Library/Caches
• rm -rf ~/Library/Logs
• rm -rf ~/Library/Caches

List Supported CPU Instructions Set [Solved]

You may find these terminal commands useful if you are looking for ways to list all supported instructions set by the CPU on a macOS machine. For instance, you can check for Intel® Streaming SIMD Extensions 4 (Intel® SSE4) or Intel® Software Guard Extensions (Intel® SGX) features for your device.

% sysctl -n "machdep.cpu.brand_string"

Intel(R) Core(TM) i5-8279U CPU @ 2.40GHz

% sysctl -a | grep machdep.cpu.features

machdep.cpu.features: FPU VME DE PSE TSC MSR PAE MCE CX8 APIC SEP MTRR PGE MCA CMOV PAT PSE36 CLFSH DS ACPI MMX FXSR SSE SSE2 SS HTT TM PBE SSE3 PCLMULQDQ DTES64 MON DSCPL VMX EST TM2 SSSE3 FMA CX16 TPR PDCM SSE4.1 SSE4.2 x2APIC MOVBE POPCNT AES PCID XSAVE OSXSAVE SEGLIM64 TSCTMR AVX1.0 RDRAND F16C

% sysctl -a | grep machdep.cpu.leaf7_features

machdep.cpu.leaf7_features: RDWRFSGS TSC_THREAD_OFFSET SGX BMI1 AVX2 SMEP BMI2 ERMS INVPCID FPU_CSDS MPX RDSEED ADX SMAP CLFSOPT IPT MDCLEAR TSXFA IBRS STIBP L1DF ACAPMSR SSBD

% sysctl -a | grep AVX2

machdep.cpu.leaf7_features: RDWRFSGS TSC_THREAD_OFFSET SGX BMI1 AVX2 SMEP BMI2 ERMS INVPCID FPU_CSDS MPX RDSEED ADX SMAP CLFSOPT IPT MDCLEAR TSXFA IBRS STIBP L1DF ACAPMSR SSBD

Delete files from Git repo and history

Follow these steps to delete single or multiple files from your Git repository and prune it from history. You should also add the file(s) to .gitignore (Step 5) to avoid committing the same files to your repo again in the future.

1. git clone <repo-path>
2. git rm file1 file2
3. git filter-repo --force --invert-paths --path file1
4. git filter-repo --force --invert-paths --path file2
5. nano .gitignore 
6. git add .
7. git commit -m "deleted file1 file2"
8. git remote add origin <repo-path>
9. git remote -v
10. git push origin --force --all
11. git push origin --force --tags

[How To] Install HElib on macOS

HElib is an open-source (Apache License v2.0) software library that implements homomorphic encryption (HE). Currently, available schemes are the implementations of the Brakerski-Gentry-Vaikuntanathan (BGV) scheme and the Approximate Number scheme of Cheon-Kim-Kim-Song (CKKS), along with many optimizations to make homomorphic evaluation runs faster, focusing mostly on effective use of the Smart-Vercauteren ciphertext packing techniques and the Gentry-Halevi-Smart optimizations. To install HElib on macOS, follow these steps:

• brew update && brew upgrade && brew autoremove && brew cleanup
  
  
• cd Downloads/
  
  
• git clone https://github.com/homenc/HElib.git

Cloning into 'HElib'...

remote: Enumerating objects: 14133, done.

remote: Counting objects: 100% (292/292), done.

remote: Compressing objects: 100% (211/211), done.

remote: Total 14133 (delta 127), reused 172 (delta 54), pack-reused 13841

Receiving objects: 100% (14133/14133), 13.04 MiB | 5.81 MiB/s, done.

Resolving deltas: 100% (10853/10853), done.

• cd HElib/

• mkdir build

• cd build 

• cmake -DPACKAGE_BUILD=ON -DENABLE_TEST=ON ..

-- The C compiler identification is AppleClang 14.0.0.14000029

-- The CXX compiler identification is AppleClang 14.0.0.14000029

-- Detecting C compiler ABI info

-- Detecting C compiler ABI info - done

-- Check for working C compiler: /Library/Developer/CommandLineTools/usr/bin/cc - skipped

-- Detecting C compile features

-- Detecting C compile features - done

-- Detecting CXX compiler ABI info

-- Detecting CXX compiler ABI info - done

-- Check for working CXX compiler: /Library/Developer/CommandLineTools/usr/bin/c++ - skipped

-- Detecting CXX compile features

-- Detecting CXX compile features - done

-- Performing Test CMAKE_HAVE_LIBC_PTHREAD

-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success

-- Found Threads: TRUE  

CMake Warning at CMakeLists.txt:264 (message):

  CAUTION: Package build should not be installed globally as it will

  potentially override dependencies.