Fix BLAS++ and LAPACK++ build by weslleyspereira · Pull Request #903 · Reference-LAPACK/lapack

weslleyspereira · 2023-08-30T23:43:59Z

In the current LAPACK master, building with BLAS++ flag ON causes the following error in CMake:

[build] [ 47%] Building CXX object test/CMakeFiles/tester.dir/test.cc.o
[build] In file included from /home/weslleyp/storage/lapack/build_RelWithDebInfo/blaspp-prefix/src/blaspp/test/test.cc:12:
[build] /home/weslleyp/storage/lapack/build_RelWithDebInfo/blaspp-prefix/src/blaspp/test/test.hh:9:10: fatal error: testsweeper.hh: No such file or directory
[build]     9 | #include "testsweeper.hh"
[build]       |          ^~~~~~~~~~~~~~~~
[build] compilation terminated.
[build] make[2]: *** [test/CMakeFiles/tester.dir/build.make:76: test/CMakeFiles/tester.dir/test.cc.o] Error 1
[build] make[1]: *** [CMakeFiles/Makefile2:154: test/CMakeFiles/tester.dir/all] Error 2
[build] make: *** [Makefile:136: all] Error 2
[build] ninja: build stopped: subcommand failed.
[proc] The command: /usr/local/bin/cmake --build /home/weslleyp/storage/lapack/build_RelWithDebInfo --config Release --target all -- exited with code: 1

There is some issue in BLAS++ (https://bitbucket.org/icl/lapackpp/downloads/lapackpp-2020.10.02.tar.gz) so that it can't find testsweeper.hh. I can give more details about my system configuration.

The point is: we actually don't need to build the BLAS++ tests to obtain libblaspp. Thus, this PR solves the issue by adding -Dbuild_tests=OFF to the configuration step of BLAS++ and LAPACK++ in LAPACK.

Closes #905.

weslleyspereira · 2023-08-30T23:46:23Z

I have two other concerns related to my last message:

We are using an old version of BLAS++ and LAPACK++ (2020.10.02). Is that intentional?
We have no tests in cmake.yml with BLAS++=ON and LAPACK++=ON.

codecov · 2023-08-30T23:51:14Z

Codecov Report

Attention: 176 lines in your changes are missing coverage. Please review.

Comparison is base (90398ae) 0.00% compared to head (ef44890) 0.00%.
Report is 24 commits behind head on master.

❗ Current head ef44890 differs from pull request most recent head 7f2c622. Consider uploading reports for the commit 7f2c622 to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
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mgates3 · 2023-08-31T15:19:03Z

1. We are using an old version of BLAS++ and LAPACK++ (2010.10.02). Is that intentional?

2020.10.02. You had me worried for a minute.

I think that was just what was available at the time. Perhaps we could use a release branch or tag to refer to the latest release. Is there a standard convention for that in Git? I just added the release branch, but we can do whatever seems best.

We can update the release version, I'm just not excited about updating LAPACK every time that BLAS++ and LAPACK++ are updated.

weslleyspereira · 2023-08-31T15:48:38Z

Sorry for the "2010", @mgates3. Not intentional. I fixed my message above.

So, I have an idea on how we could make it easy to

I think that was just what was available at the time. Perhaps we could use a release branch or tag to refer to the latest release. Is there a standard convention for that in Git? I just added the release branch, but we can do whatever seems best.

We can update the release version, I'm just not excited about updating LAPACK every time that BLAS++ and LAPACK++ are updated.

Ok. Thanks. We could at least try to update these dependencies whenever we release LAPACK, or whenever BLAS++ and LAPACK++ have a major update regarding the wrappers. I am also not too excited to update LAPACK every time that BLAS++ and LAPACK++ are updated. I was just surprised it was using a release from almost 3 years ago.

weslleyspereira · 2023-08-31T15:52:38Z

Now, about my second bullet: We have no tests in cmake.yml with BLAS++=ON and LAPACK++=ON. This is more worrisome to me. Yesterday, I was trying to use those flags and end up finding out that sometimes BLAS++ links with a BLAS library outside the repository, and I think that was not the plan when the flags were added. I will create an issue with more details.

weslleyspereira · 2023-09-08T19:58:08Z

I updated this PR so that it solves #905. It should be ready for review.

Note that the changes do not add tests for the flag LAPACK++ because of icl-utk-edu/lapackpp#44.

mgates3

I coded up some changes in this commit. These work on my Mac with this configuration:

cmake -D BLAS++=true -D LAPACK++=true \
      -D USE_OPTIMIZED_BLAS=true -D BLA_VENDOR=Apple \
      -D CMAKE_INSTALL_PREFIX=${HOME}/install-lapack -B build
cd build
make
make install

Haven't tried other configurations or elsewhere yet.

mgates3 · 2023-10-10T15:41:59Z

CMakeLists.txt

+  lapackpp
+  GIT_REPOSITORY https://github.com/icl-utk-edu/lapackpp
+  GIT_TAG        62680a16a9aba2a426e3d089dd13e18bfd140c74 # v2023.08.25
+)


May want blaspp 91dd418fa910498cc03dee397826099914cc3185
and lapackpp 88088c33cd9467475e8f139f42d158620f11e64d
which have the fixes for Fortran strlen.

We will likely do a SLATE / BLAS++ / LAPACK++ bug fix release this month, but perhaps for that just update LAPACK right before the SC23 release.

mgates3 · 2023-10-11T05:33:26Z

CMakeLists.txt

+      # TODO: This is incomplete. Fill in the other cases.
+      set(BLAS_Fortran_LIB "")
+    endif()
+  endif()


Is this when using Reference BLAS, is that why it checks NOT BLAS_FOUND?

When I tried to compile, linking with liblapack.a also needed -lgfortran, but since I used optimized BLAS, BLAS_FOUND was true and BLAS_Fortran_LIB was empty.

BTW, setting it to empty in the else case is redundant with set above if.

mgates3 · 2023-10-11T06:20:34Z

CMakeLists.txt

+    -D CMAKE_INSTALL_PREFIX="${blaspp_BINARY_DIR}"
+    -D CMAKE_INSTALL_LIBDIR="${PROJECT_BINARY_DIR}/lib"
+    -D blas_libraries_cached=""
+    -D lapack_libraries_cached=""


Why was it needed to set blas_libraries_cached and lapack_libraries_cached? These are internal variables to the BLAS++ and LAPACK++ CMake scripts and subject to change.

Is this from having 2 COMMAND cmake above in the add_custom_command? Better to have only 1 COMMAND cmake so it searches correctly the first time.

(The additional COMMAND cmake --build below seems fine.)

I don't think I need to set blas_libraries_cached and lapack_libraries_cached even if we configure cmake 2x. I needed it at some point of writing the PR, but I can't reproduce it anymore.

mgates3 · 2023-10-11T06:48:15Z

CMakeLists.txt

+      COMMAND ${CMAKE_COMMAND}
+      -B "${lapackpp_BINARY_DIR}"
+      -D LAPACK_LIBRARIES="${LAPACK_LIBRARIES}" )
+  endif()


As above, this can be simplified.

mgates3 · 2023-10-11T06:48:30Z

CMakeLists.txt

+    -B "${lapackpp_BINARY_DIR}"
+    -D CMAKE_INSTALL_PREFIX="${lapackpp_BINARY_DIR}"
+    -D CMAKE_INSTALL_LIBDIR="${PROJECT_BINARY_DIR}/lib"
+    -D lapack_libraries_cached=""


As above, shouldn't set internal variables.

mgates3 · 2023-10-11T06:58:28Z

CMakeLists.txt

+  # Setup remaining configuration options and installation
+  add_custom_command( OUTPUT lapackpp-cmd APPEND
+    COMMAND ${CMAKE_COMMAND}
+    -B "${lapackpp_BINARY_DIR}"


For me, LAPACK++ couldn't find BLAS++. I found it easier to install them in the same directory. Maybe setting CMAKE_PREFIX_PATH would also work.

mgates3 · 2023-10-11T07:44:34Z

CMakeLists.txt

-  FILES_MATCHING REGEX "liblapackpp.(a|so)$"
+    DIRECTORY "${LAPACK_BINARY_DIR}/lib/"
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    FILES_MATCHING REGEX "liblapackpp.(a|so)$"


There could be other lapackpp files. Matching on just lapackpp would capture everything. For instance:

-- Installing: /.../lapack/build4/lib/cmake/lapackpp/lapackppTargets.cmake -- Installing: /.../lapack/build4/lib/cmake/lapackpp/lapackppTargets-noconfig.cmake -- Installing: /.../lapack/build4/lib/cmake/lapackpp/lapackppConfig.cmake -- Installing: /.../lapack/build4/lib/cmake/lapackpp/lapackppConfigVersion.cmake

mgates3 · 2023-10-11T07:46:37Z

CMakeLists.txt

-          "${CMAKE_CURRENT_BINARY_DIR}/lib/lapackpp/lapackppConfigVersion.cmake"
+    FILES "${CMAKE_CURRENT_BINARY_DIR}/lib/cmake/lapackpp/lapackppConfig.cmake"
+          "${CMAKE_CURRENT_BINARY_DIR}/lib/cmake/lapackpp/lapackppConfigVersion.cmake"
    DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/"


There are a couple other files; see above for easier fix.

mgates3 · 2023-10-11T08:01:51Z

CMakeLists.txt

+        -D BLAS_LIBRARIES="${BLAS_LIBRARIES}"
+        -D LAPACK_LIBRARIES="${LAPACK_LIBRARIES}" )
+    endif()
+  endif()


These 4 add_custom_command blocks are quite redundant. May I suggest setting some variables to have one 1 instance? See my top-level review comment for suggestion.

The redundancy is because we cannot use CMake generator expressions (e.g., $<TARGET_FILE:${LAPACKLIB}>) to set CMake variables at configuration time. See https://stackoverflow.com/questions/51353110/how-do-i-output-the-result-of-a-generator-expression-in-cmake. There is certainly a better way to do this, but I couldn't figure it out.

mgates3 · 2023-10-11T08:03:30Z

CMakeLists.txt

  )

 endif()
 if (BLAS++)


LAPACK++ requires BLAS++, so as above, I think this should be if (BLAS++ OR LAPACK++).

With cmake -D LAPACK++=on .., this will build BLAS++ and LAPACK++, but doesn't install libblaspp.a. Changing to if (BLAS++ or LAPACK++) fixes the issue. Can be merged with if block below (line 650).

weslleyspereira · 2023-10-13T22:02:39Z

Even with the changes from this commit. I am still having trouble to use the flag LAPACK++. See icl-utk-edu/lapackpp#50

weslleyspereira · 2023-10-31T16:54:01Z

The AppVeyor script needs some change. I will open an issue for that.

This PR is ready to be merged.

weslleyspereira · 2023-10-31T16:58:40Z

@mgates3, could you review the current stage of this PR. I think this is ready to merge. Thanks!

mgates3

Here's the patch that worked for me:

sh leconte lapack> git diff
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 17609c05d..89db6a866 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -633,21 +633,19 @@ install(FILES
 
 if (LAPACK++)
   install(
-    DIRECTORY "${LAPACK_BINARY_DIR}/lib/"
+    DIRECTORY "${LAPACK_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}/"
     DESTINATION ${CMAKE_INSTALL_LIBDIR}
     FILES_MATCHING REGEX "lapackpp"
   )
 endif()
 
-if (BLAS++)
+if (BLAS++ OR LAPACK++)
   install(
-    DIRECTORY "${LAPACK_BINARY_DIR}/lib/"
+    DIRECTORY "${LAPACK_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}/"
     DESTINATION ${CMAKE_INSTALL_LIBDIR}
     FILES_MATCHING REGEX "blaspp"
   )
-endif()
 
-if (BLAS++ OR LAPACK++)
   install(
     DIRECTORY "${LAPACK_BINARY_DIR}/include/"
     DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"

Otherwise, looks good. I tested on macOS with GNU compilers and OpenBLAS, and on Linux (Redhat) with GNU compilers, Intel MKL, and CUDA.

One minor issue, on Linux it said

-- Build files have been written to: /home/mgates/repos/lapack/build2/_deps/lapackpp-build
gmake[3]: warning: jobserver unavailable: using -j1.  Add '+' to parent make rule.

and then run make in serial instead of parallel, so it was rather slow. Not a big deal.

mgates3 · 2023-11-11T23:00:35Z

CMakeLists.txt

-  DIRECTORY "${LAPACK_BINARY_DIR}/lib/"
-  DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  FILES_MATCHING REGEX "libblaspp.(a|so)$"
+    DIRECTORY "${LAPACK_BINARY_DIR}/lib/"


On Linux, it put them in ${LAPACK_BINARY_DIR}/lib64, so it find libblaspp.a and liblapackpp.a to install:

sh leconte build2> pwd /home/mgates/repos/lapack/build2 sh leconte build2> ls lib lib64 lib: liblapack.a lib64: cmake libblaspp.a liblapackpp.a sh leconte build2> ls ~/install-test/lib64/ cmake liblapack.a pkgconfig

On macOS, it put them in ${LAPACK_BINARY_DIR}/lib, and everything worked (with previously mentioned fix about if (BLAS++ or LAPACK++)):

pangolin lapack/build3> pwd /Users/mgates/Documents/lapack/build3 pangolin lapack/build3> ls lib cmake/ libblaspp.a liblapack.a liblapackpp.a pangolin lapack/build3> ls ~/install-test/lib/ cmake/ libblaspp.a liblapack.a liblapackpp.a pkgconfig/

mgates3 · 2023-11-12T00:06:56Z

CMakeLists.txt

-    FILES "${CMAKE_CURRENT_BINARY_DIR}/lib/lapackpp/lapackppConfig.cmake"
-          "${CMAKE_CURRENT_BINARY_DIR}/lib/lapackpp/lapackppConfigVersion.cmake"
-    DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/"
+    DIRECTORY "${LAPACK_BINARY_DIR}/lib/"


Same issue as below; use ${CMAKE_INSTALL_LIBDIR}.

Reference-LAPACK#903 (review)

mgates3 · 2024-11-04T23:31:41Z

@weslleyspereira Any plans to fix this branch up and merge?
2024.10.26 is the latest BLAS++ and LAPACK++ version.
https://github.com/icl-utk-edu/blaspp/releases/tag/v2024.10.26
https://github.com/icl-utk-edu/lapackpp/releases/tag/v2024.10.26

weslleyspereira · 2024-11-15T23:12:05Z

@weslleyspereira Any plans to fix this branch up and merge? 2024.10.26 is the latest BLAS++ and LAPACK++ version. https://github.com/icl-utk-edu/blaspp/releases/tag/v2024.10.26 https://github.com/icl-utk-edu/lapackpp/releases/tag/v2024.10.26

I can do that. Should I wait for icl-utk-edu/blaspp#91 and icl-utk-edu/lapackpp#71?

See mgates3@ecf6f41

Reference-LAPACK#903 (review)

weslleyspereira · 2025-03-27T17:56:34Z

Couldn't make BLAS++ and LAPACK++ link with the correct LAPACK library when using shared libs. See:

https://github.com/Reference-LAPACK/lapack/actions/runs/14112347619/job/39534062300 (end of build phase)
https://github.com/Reference-LAPACK/lapack/actions/runs/14112347619/job/39534062301 (end of build phase)

Interestingly, static libraries are correctly linked. See:

https://github.com/Reference-LAPACK/lapack/actions/runs/14112347619/job/39534062287 (end of build phase)

weslleyspereira mentioned this pull request Aug 31, 2023

Flag BLAS++ seems not to be working properly #905

Open

weslleyspereira force-pushed the fix-blaspp-build branch 2 times, most recently from 95bd970 to 35c78b7 Compare September 7, 2023 18:07

weslleyspereira force-pushed the fix-blaspp-build branch 4 times, most recently from 66905e9 to 680cfd8 Compare September 8, 2023 19:42

weslleyspereira mentioned this pull request Oct 10, 2023

Try testBLAS with LAPACK #913

Draft

mgates3 requested changes Oct 11, 2023

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weslleyspereira force-pushed the fix-blaspp-build branch from 00f51ca to fc569f4 Compare October 16, 2023 14:54

weslleyspereira mentioned this pull request Oct 31, 2023

LAPACKFinder issue error - LAPACK++ requires a LAPACK library and none was found. #828

Open

weslleyspereira force-pushed the fix-blaspp-build branch from 9ded2af to b50109c Compare November 8, 2023 22:13

mgates3 requested changes Nov 12, 2023

View reviewed changes

weslleyspereira added a commit to weslleyspereira/lapack that referenced this pull request Nov 12, 2023

Applies @mgates3 patch to fix BLAS++ and LAPACK++ installation

7f2c622

Reference-LAPACK#903 (review)

mgates3 previously approved these changes Nov 12, 2023

View reviewed changes

weslleyspereira added 4 commits March 27, 2025 10:20

Fix BLAS++ and LAPACK++ build

9bba252

Add test to the CI for BLAS++ and LAPACK++ flags

15a47d7

Try to fix BLAS++ and LAPACK++ installation so that the tests pass

147558f

More changes to improve flags BLAS++ and LAPACK++

3426961

weslleyspereira and others added 4 commits March 27, 2025 10:28

Apply @mgates3's patch and add BUILD_TYPE to BLAS++ and LAPACK++

5db3c7d

See mgates3@ecf6f41

Updates BLAS++ and LAPACK++ to v2023.11.05

88b485d

Applies @mgates3 patch to fix BLAS++ and LAPACK++ installation

be80dd5

Reference-LAPACK#903 (review)

Rebased and updated BLAS++ to v2024.10.26

80be947

weslleyspereira force-pushed the fix-blaspp-build branch from 7f2c622 to 80be947 Compare March 27, 2025 16:33

Weslley da Silva Pereira added 2 commits March 27, 2025 10:55

Adds a fix that got lost in the rebase

6cf667f

Enable LAPACK++ tests in the action test-blaspp-flag

a5c5d4d

weslleyspereira force-pushed the fix-blaspp-build branch from 85b55f9 to a5c5d4d Compare March 27, 2025 17:44

weslleyspereira dismissed mgates3’s stale review via a5c5d4d June 16, 2025 22:49

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