software-developement.md

Compilation

Make

Compile software faster by using all CPU cores in parallel.
-j - parallel compilation
$(nproc) - A bash command substitution that returns the number of CPU cores
nproc - command prints the number of available CPU cores
make -j$(nproc)

Build System Components

Configure Script:

A shell script that checks your system and prepares the build Creates a custom Makefile tailored to YOUR system

CFLAGS="-O3 -march=native -mtune=native" \
CXXFLAGS="-O3 -march=native -mtune=native" \
./configure \
  --enable-cxx \
  --enable-python \
  --disable-java \
  PYTHON=python3

a) Compiler Flags:

Instructions that control HOW the compiler works CFLAGS="-O3 -march=native -mtune=native"
CFLAGS - Controls the C compiler (gcc) behavior CXXFLAGS - Controls the C++ compiler (g++) behavior -03 - Optimization Level 3 (Maximum speed)

-O0 = No optimization (fast compile, slow execution)
-O1 = Basic optimization
-O2 = Recommended optimization (default in many projects)
-O3 = Aggressive optimization (slower compile, fastest execution)

Use Your CPU's Instruction Set: -march=native

-march=x86-64     # Generic x86 64-bit instructions only
-march=native     # Use EVERY feature your specific CPU has

Optimize for Your Specific CPU Model: -mtune=native

-mtune=generic    # Generic scheduling for all CPUs
-mtune=native     # Optimize for YOUR specific CPU model

b) Configure Options:

Enable/disable installation of these APIs. app-specific arguments. Enables building of C++ bindings (for SmuView): --enable-cxx Enables building of Python bindings (for automation): --enable-python Disables building of Java bindings (avoid build errors): --disable-java Tells configure which Python interpreter to use PYTHON=python3