Skip to content

build: support Eigen 5 #6036

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
rwgk merged 5 commits into from
Apr 18, 2026
+10 −0
Merged

build: support Eigen 5 #6036

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
48544f2
build: support Eigen 5
e-kwsm Apr 13, 2026
f5e85f3
Merge branch 'master' into e-kwsm→eigen5
rwgk Apr 18, 2026
f303db9
build: probe Eigen 3 and 5 separately in CMake config mode
rwgk Apr 18, 2026
3a827f2
[skip ci] build: clarify Eigen 5 module fallback comment
rwgk Apr 18, 2026
8d619c4
[skip ci] docs: add Eigen 5 entry to v3.0.4 changelog
rwgk Apr 18, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 3 additions & 0 deletions docs/changelog.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,9 @@ Internal:

Bug fixes:

- Fixed test builds with installed Eigen 5 by improving `Eigen3` CMake package detection.
[#6036](https://github.com/pybind/pybind11/pull/6036)

- Fixed move semantics of `scoped_ostream_redirect` to preserve buffered output and avoid crashes when moved redirects restore stream buffers.
[#6033](https://github.com/pybind/pybind11/pull/6033)

Expand Down
7 changes: 7 additions & 0 deletions tests/CMakeLists.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -300,10 +300,17 @@ if(PYBIND11_TEST_FILES_EIGEN_I GREATER -1)

else()
find_package(Eigen3 3.2.7 QUIET CONFIG)
if(NOT Eigen3_FOUND)
find_package(Eigen3 5 QUIET CONFIG)
endif()
set(EIGEN3_FOUND ${Eigen3_FOUND})
set(EIGEN3_VERSION ${Eigen3_VERSION})

if(NOT EIGEN3_FOUND)
# Couldn't load via target, so fall back to allowing module mode finding, which will pick up
# tools/FindEigen3.cmake
# This MODULE-mode fallback is for older Eigen 3 setups; Eigen 5 is expected to be found
# via the CONFIG-mode probes above.
find_package(Eigen3 3.2.7 QUIET)
endif()
endif()
Expand Down
Loading