Building

Building

Rosemary uses a single build.sh script to cross-compile both the server and agent for all supported platforms and architectures.

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Requirements

• Go 1.25 or later
• GOTOOLCHAIN=auto is set by the build script automatically
• CGO_ENABLED=0 no C dependencies, fully static binaries
• For Windows server builds: WinDivert.dll and WinDivert64.sys must be present in rosemary/ before building

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Clone and Build

git clone https://github.com/blue0x1/rosemary.git
cd rosemary
bash build.sh

Output binaries are placed in dist/.

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Build Script Usage

bash build.sh [target] [os] [arch]

Argument	Options	Default
target	rosemary, agent, all	all
os	linux, windows, darwin, freebsd, openbsd, all	all
arch	amd64, arm64, arm, 386, all	all

Examples

# Build everything
bash build.sh

# Build server only for Linux amd64
bash build.sh rosemary linux amd64

# Build agent only for Windows
bash build.sh agent windows amd64

# Build all targets for macOS
bash build.sh all darwin all

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Supported Targets

OS	Architectures
Linux	amd64, arm64, arm, 386
Windows	amd64, arm64, 386
macOS	amd64, arm64
FreeBSD	amd64, arm64, arm, 386
OpenBSD	amd64, arm64, arm, 386

ARM 32-bit builds use GOARM=7.

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Output Naming

dist/rosemary-<os>-<arch>
dist/rosemary-<os>-<arch>.exe   (Windows)
dist/agent-<os>-<arch>
dist/agent-<os>-<arch>.exe      (Windows)

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Size Checks

The build script checks minimum binary sizes after each build:

Binary	Minimum size
rosemary (server)	8 MB
agent	4 MB

A warning is printed if a binary is suspiciously small, which may indicate an incomplete or failed build.

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Windows Server: WinDivert

The Windows server build embeds WinDivert.dll and WinDivert64.sys directly into the binary. They are extracted to a temporary directory at runtime.

Before building the Windows server target, place both files in the rosemary/ directory:

1. Download WinDivert v2.x (64-bit) from the official source
2. Copy WinDivert.dll and WinDivert64.sys into rosemary/
3. Run the build

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go install

Alternatively, install directly without cloning:

go install github.com/blue0x1/rosemary/rosemary@latest
go install github.com/blue0x1/rosemary/agent@latest

For sudo use, copy to the system path:

sudo cp ~/go/bin/rosemary /usr/local/bin/