Build Status Go Reference

Go bindings for IUP, a multi-platform toolkit for building graphical user interfaces. The toolkit provides system native UI controls for Windows, Linux (GTK+), and macOS.

IUP C source code is included and compiled together with bindings. Note that the first build can take a few minutes.



On Windows, you need a C compiler, like Mingw-w64 or TDM-GCC. You can also build a binary in MSYS2 shell.

Note that Windows manifest is included in the build by default. IUP controls appearance will follow the system appearance only if the manifest is used. If not using the manifest, it will always look like Windows XP Classic. See below how to disable manifest if you want to include your own.

  • To remove console window, i.e., compile GUI app, build with -ldflags "-H=windowsgui.
  • You can add icon resource to .exe file with the rsrc tool.



On Linux, you need a C compiler and GTK+ development packages.

  • Debian/Ubuntu: apt-get install libgtk-3-dev
  • RedHat/Fedora: dnf install gtk3-devel

When you are not using gl tag, the library is built with GDK_NULL to completely remove the X11 usage, so it should just work in Wayland.

Note that you can also build and link against the GTK2 version, see build tags below.



On macOS, you need Xcode or Command Line Tools for Xcode.

Note that support for Cocoa is a work in progress. Not everything is implemented. If you can help with Cocoa or GLCanvas, please join the IUP mailing list. Also note that you must use and distribute binary in the .app directory, together with .nib compiled resources, see example.app.

You can also build for GTK+ in macOS, with gtk build tag. It will use Quartz native rendering. See screenshot, .app is not required with GTK+.

Install GTK+ development packages with brew.

  • brew install gtk+3



Although not tested, the library should work on other Unix-like systems, FreeBSD, NetBSD, OpenBSD, DragonFly, Solaris, Illumos, and AIX.

You can also compile for time-tested Motif library if GTK+ is not available, though not all controls and attributes are possible, check the documentation for details.


Build tags

  • gl – build with support for GLCanvas (Windows and Linux)
  • gtk – use GTK+ in macOS or Windows
  • gtk2 – link with GTK2 version, default is GTK3 (Linux)
  • motif – build for X11/Motif 2.x environment
  • nomanifest – do not include manifest in Windows build


IUP documentation is nice, every Go function in doc reference there. Also check Go Reference and Examples.


User interface (and OpenGL) is usually not thread-safe and IUP is not thread-safe. Some platforms enforce running UI on the main thread. Note that a goroutine can arbitrarily and randomly be scheduled or rescheduled on different running threads.

The secondary threads should not directly update the interface, instead, use PostMessage that is expected to be thread-safe. See example that sends data to an element, that will be received by a callback when the main loop regains control.

You can also use the mainthread package to schedule functions on the main thread.

Cross-compile (Linux)

To cross-compile for Windows install MinGW toolchain.

$ CGO_ENABLED=1 CC=x86_64-w64-mingw32-gcc GOOS=windows GOARCH=amd64 go build -ldflags "-s -w"
$ file alarm.exe
alarm.exe: PE32+ executable (console) x86-64, for MS Windows

$ CGO_ENABLED=1 CC=i686-w64-mingw32-gcc GOOS=windows GOARCH=386 go build -ldflags "-s -w"
$ file alarm.exe
alarm.exe: PE32 executable (console) Intel 80386, for MS Windows

To cross-compile for macOS install OSXCross toolchain.

$ CGO_ENABLED=1 CC=x86_64-apple-darwin21.1-clang GOOS=darwin GOARCH=amd64 go build -ldflags "-linkmode external -s -w '-extldflags=-mmacosx-version-min=10.14'"
$ file alarm
alarm: Mach-O 64-bit x86_64 executable, flags:<NOUNDEFS|DYLDLINK|TWOLEVEL|WEAK_DEFINES|BINDS_TO_WEAK>

$ CGO_ENABLED=1 CC=aarch64-apple-darwin21.1-clang GOOS=darwin GOARCH=arm64 go build -ldflags "-linkmode external -s -w '-extldflags=-mmacosx-version-min=10.14'"
$ file alarm
alarm: Mach-O 64-bit arm64 executable, flags:<NOUNDEFS|DYLDLINK|TWOLEVEL|WEAK_DEFINES|BINDS_TO_WEAK|PIE>



iup-go is MIT licensed, same as IUP. View LICENSE.


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