How to Use -gcflags and -ldflags in Go Builds

Use -gcflags to pass options to the Go compiler and -ldflags to pass options to the linker during the build process. Run go build -gcflags="-N -l" -ldflags="-s -w" main.go to disable optimizations and strip debug info for a smaller binary. The -N and -l flags in -gcflags disable optimizations and inlining, while -s and -w in -ldflags strip the symbol table and DWARF debugging information.

Think of -gcflags as instructions for the chef (compiler) on how to cook the ingredients (your code), like turning off the oven's auto-bake feature. Think of -ldflags as instructions for the packer (linker) on how to wrap the final meal, like removing the nutrition label to make the box smaller. You use these when you need to debug your code by slowing it down or when you want to shrink your final program file.