cad-native

Native DWG-to-DXF-group-code sidecar. It reads a DWG with LibreDWG's C API and writes a DXF pair stream to stdout. It does not call dwg_write_dxf; the existing buildCadScene consumes the output unchanged.

• LibreDWG: GNU official 0.14 stable source
• Source archive SHA256: 62ebb73b984f865960f20ed26619ea5f8789d5e3fd088fa40a2598384da81275
• The corresponding source archive is shipped as libredwg-0.14.tar.xz in this directory for GPL compliance.
• License: GPL-3.0-or-later (LibreDWG); this sidecar source is GPL-3.0-or-later as a derivative work.
• The sidecar is built natively on each platform. Do not cross-compile with MinGW: macOS uses Clang, Windows uses MSVC.

Build LibreDWG 0.14

Use the official source from https://ftp.gnu.org/gnu/libredwg/libredwg-0.14.tar.xz.

macOS / Linux

tar -xJf libredwg-0.14.tar.xz
cd libredwg-0.14
./configure --prefix="$PWD/install" --disable-shared --enable-static \
  --disable-bindings --disable-docs --disable-python \
  --disable-dxf --disable-json --disable-write --disable-werror --disable-dependency-tracking
make -j4

The static library is src/.libs/libredwg.a.

Windows (MSVC / CMake)

Build the same LibreDWG 0.14 source with CMake and MSVC (no MinGW), producing redwg.lib. The upstream source ships a CMake build; keep DEBUG_CLASSES enabled if the Windows build needs complete DWG object coverage.

Build the sidecar

macOS / Linux

bash build-macos.sh /path/to/libredwg-0.14   # or build-linux.sh

Windows (MSVC, no MinGW)

Use the official libredwg-0.14-win64.zip from the LibreDWG 0.14 release. The script generates a MSVC import library from the official DLL with dumpbin/lib, compiles the sidecar with CMake + Visual Studio 2022, and copies libredwg-0.dll and its runtime DLLs beside the executable:

.\build-windows.ps1 -LibreDwgWin64Zip C:\path\to\libredwg-0.14-win64.zip

The sidecar links the static MSVC CRT (CMAKE_MSVC_RUNTIME_LIBRARY=MultiThreaded). It must not depend on VCRUNTIME140.dll or the UCRT: end-user machines without the VC++ 2015-2022 Redistributable would fail to start it at load time (exit 0xC0000135, no stderr). The build script verifies the dependency table with dumpbin /dependents and fails on any MSVC/UCRT runtime DLL.

The build scripts write the result to the platform directory:

• macOS: native/darwin-arm64/cad-native or native/darwin-x64/cad-native
• Linux: native/linux-x64/cad-native
• Windows: native/win32-x64/cad-native.exe (plus the runtime DLLs in the same directory)

@customize-agent/knowledge depends on this package and resolves native/<platform>-<arch>/cad-native inside it; CUSTOMIZE_CAD_NATIVE_BINARY can override the path for tests.