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Merged
gsdali merged 1 commit into from
May 15, 2026
Merged

Bump OCCT to 8.0.0 final release #6

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6 changes: 3 additions & 3 deletions .github/workflows/build.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ jobs:
uses: actions/cache@v4
with:
path: deps/occt-install
key: occt-8.0.0-rc5-windows-x64-${{ hashFiles('scripts/build-occt-deps.sh') }}
key: occt-8.0.0-windows-x64-${{ hashFiles('scripts/build-occt-deps.sh') }}

- name: Build OCCT dependencies
if: steps.cache-occt.outputs.cache-hit != 'true'
Expand Down Expand Up @@ -59,7 +59,7 @@ jobs:
uses: actions/cache@v4
with:
path: deps/occt-install
key: occt-8.0.0-rc5-macos-arm64-${{ hashFiles('scripts/build-occt-deps.sh') }}
key: occt-8.0.0-macos-arm64-${{ hashFiles('scripts/build-occt-deps.sh') }}

- name: Build OCCT dependencies
if: steps.cache-occt.outputs.cache-hit != 'true'
Expand Down Expand Up @@ -100,7 +100,7 @@ jobs:
uses: actions/cache@v4
with:
path: deps/occt-install
key: occt-8.0.0-rc5-linux-x64-${{ hashFiles('scripts/build-occt-deps.sh') }}
key: occt-8.0.0-linux-x64-${{ hashFiles('scripts/build-occt-deps.sh') }}

- name: Build OCCT dependencies
if: steps.cache-occt.outputs.cache-hit != 'true'
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4 changes: 2 additions & 2 deletions CLAUDE.md
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Expand Up @@ -46,9 +46,9 @@ On headless Linux the viewer test needs `xvfb-run ctest …`. CI on all three pl

## OCCT dependency

`scripts/build-occt-deps.sh` clones OCCT at tag `V8_0_0_beta1` from `Open-Cascade-SAS/OCCT` and builds it as **static** libraries with a curated module subset (DataExchange, FoundationClasses, ModelingAlgorithms, ModelingData, Visualization). FreeType, FreeImage, RapidJSON, TBB, VTK, Draco, FFmpeg, OpenVR, Tcl are all disabled to keep the dependency minimal. Linux builds add `USE_XLIB=ON`. The script tolerates executable-link failures (`|| true`) because we only need the static `.a`/`.lib` files.
`scripts/build-occt-deps.sh` clones OCCT at tag `V8_0_0` from `Open-Cascade-SAS/OCCT` and builds it as **static** libraries with a curated module subset (DataExchange, FoundationClasses, ModelingAlgorithms, ModelingData, Visualization). FreeType, FreeImage, RapidJSON, TBB, VTK, Draco, FFmpeg, OpenVR, Tcl are all disabled to keep the dependency minimal. Linux builds add `USE_XLIB=ON`. The script tolerates executable-link failures (`|| true`) because we only need the static `.a`/`.lib` files.

**Known build quirk (rc5/beta1):** OCCT 8.0.0's generated Makefiles intermittently skip the `mkdir` for object subdirectories (e.g. `TKShHealing.dir/ShapeAlgo/`, `ShapeProcessAPI/`) under high `-j` parallelism, causing `error: unable to open output file ... 'No such file or directory'`. Workaround: re-run `cmake --build . --parallel N` from inside `deps/occt-build` until it converges, or pre-create the missing subdirs with `mkdir -p`. The script does not yet auto-recover from this, so a fresh clean build may need 1–2 retries.
**Known build quirk (rc5/beta1/final):** OCCT 8.0.0's generated Makefiles intermittently skip the `mkdir` for object subdirectories (e.g. `TKShHealing.dir/ShapeAlgo/`, `ShapeProcessAPI/`) under high `-j` parallelism, causing `error: unable to open output file ... 'No such file or directory'`. Workaround: re-run `cmake --build . --parallel N` from inside `deps/occt-build` until it converges, or pre-create the missing subdirs with `mkdir -p`. The script does not yet auto-recover from this, so a fresh clean build may need 1–2 retries.

`CMakeLists.txt` searches `${OCCT_INSTALL_DIR}` for headers under `include/opencascade`, `include`, or Windows-style `inc/`; libraries under `lib/` or `win64/vc14/lib/`. The required toolkit list is hand-maintained at `OCCT_LIBS`. **Linux linking** wraps these archives in `-Wl,--start-group … -Wl,--end-group` because OCCT's static archives have circular dependencies — adding a new `TK*` toolkit on Linux often surfaces as an unresolved-symbol error rather than a missing-library error; check the OCCT_LIBS list first. macOS/Windows do not need the group wrapping.

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13 changes: 3 additions & 10 deletions scripts/build-occt-deps.sh
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Expand Up @@ -18,9 +18,7 @@
set -e

OCCT_VERSION="8.0.0"
# Use beta1 (feature-frozen 2026-04-30; final 8.0.0 planned 2026-05-07).
# Switch to "" once the final V8_0_0 tag is published.
OCCT_RC="beta1"
OCCT_RC=""
# Pre-release tags use format V8_0_0_rc5 / V8_0_0_beta1; release uses V8_0_0
if [ -n "$OCCT_RC" ]; then
OCCT_TAG="V${OCCT_VERSION//./_}_${OCCT_RC}"
Expand Down Expand Up @@ -74,13 +72,8 @@ cd "$DEPS_DIR"

if [ ! -d "occt-src" ]; then
echo ">>> Downloading OCCT source..."
if [ -n "$OCCT_RC" ]; then
git clone --depth 1 --branch "$OCCT_TAG" \
https://github.com/Open-Cascade-SAS/OCCT.git occt-src
else
git clone --depth 1 --branch "$OCCT_TAG" \
https://git.dev.opencascade.org/repos/occt.git occt-src
fi
git clone --depth 1 --branch "$OCCT_TAG" \
https://github.com/Open-Cascade-SAS/OCCT.git occt-src
else
echo ">>> OCCT source already exists, skipping download"
fi
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