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[lapack-reference] build failure for triplet arm64-linux when cross-compiling from x64-linux #44605

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stemann opened this issue Mar 25, 2025 · 8 comments
Open

[lapack-reference] build failure for triplet arm64-linux when cross-compiling from x64-linux #44605

stemann opened this issue Mar 25, 2025 · 8 comments
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category:community-triplet A PR or issue related to community triplets not officially validated by the vcpkg team.

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@stemann
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stemann commented Mar 25, 2025 •
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Package: lapack-reference[blas-select,core,noblas]:[email protected]#5

Host Environment

  • Host: x64-linux
  • Compiler: GNU 12.3.0 (both gcc and aarch64-linux-gnu-gcc)
  • vcpkg-tool version: 2024-12-09-1005b78fa1bf1dde1a20c2734cba4ea61ca94d9a
    vcpkg-scripts version: b322364 2024-12-16

Operating system

Linux

Compiler

GCC

Steps to reproduce the behavior

./vcpkg install --triplet arm64-linux

Using vcpkg.json (manifest) which contains mlpack (package which have lapack-reference as a dependency):

$ vcpkg/vcpkg depend-info mlpack lapack-reference --triplet arm64-linux --format=tree
mlpack
+-- armadillo
|   +-- blas
|   |   +-- openblas
|   |   |   +-- openblas:host
|   |   |   |   +-- pthread:host
|   |   |   |   |   +-- pthreads:host
|   |   |   |   |       +-- vcpkg-cmake-config:host
|   |   |   |   +-- vcpkg-cmake:host
|   |   |   |   +-- vcpkg-cmake-config:host
|   |   |   +-- pthread
|   |   |   |   +-- pthreads
|   |   |   |       +-- vcpkg-cmake-config:host
|   |   |   +-- vcpkg-cmake:host
|   |   |   +-- vcpkg-cmake-config:host
|   |   +-- vcpkg-cmake:host
|   +-- lapack
|   |   +-- lapack-reference
|   |   |   +-- blas
|   |   |   |   +- ...
|   |   |   +-- vcpkg-cmake:host
|   |   |   +-- vcpkg-cmake-config:host
|   |   +-- vcpkg-cmake:host
|   +-- vcpkg-cmake:host
|   +-- vcpkg-cmake-config:host
+-- cereal
|   +-- vcpkg-cmake:host
|   +-- vcpkg-cmake-config:host
+-- ensmallen
|   +-- armadillo
|   |   +- ...
|   +-- blas
|   |   +- ...
|   +-- lapack
|   |   +- ...
|   +-- vcpkg-cmake:host
|   +-- vcpkg-cmake-config:host
+-- stb

Failure logs

2025-03-25T14:25:39.7750910Z Installing 95/118 openblas:[email protected]...
2025-03-25T14:25:39.7751061Z Building openblas:[email protected]...
2025-03-25T14:25:39.7751271Z /root/.cache/vcpkg/registries/git-trees/653ab9ede4c3c8b556b5d1b8b7d98d6abab8ef9d: info: installing overlay port from here
2025-03-25T14:25:39.7982719Z Downloading OpenMathLib-OpenBLAS-v0.3.27.tar.gz
2025-03-25T14:25:43.8721400Z Successfully downloaded OpenMathLib-OpenBLAS-v0.3.27.tar.gz.
2025-03-25T14:25:44.1446770Z -- Extracting source /azp/_work/1/s/vcpkg/downloads/OpenMathLib-OpenBLAS-v0.3.27.tar.gz
2025-03-25T14:25:45.0275819Z -- Applying patch uwp.patch
2025-03-25T14:25:45.0326017Z -- Applying patch fix-redefinition-function.patch
2025-03-25T14:25:45.0369331Z -- Applying patch install-tools.patch
2025-03-25T14:25:45.0415194Z -- Using source at /azp/_work/1/s/vcpkg/buildtrees/openblas/src/v0.3.27-b066c33329.clean
2025-03-25T14:25:45.0512306Z -- Configuring x64-linux
2025-03-25T14:25:47.6683544Z -- Building x64-linux-dbg
2025-03-25T14:27:14.8392380Z -- Building x64-linux-rel
2025-03-25T14:29:34.9800722Z -- Fixing pkgconfig file: /azp/_work/1/s/vcpkg/packages/openblas_x64-linux/lib/pkgconfig/openblas.pc
2025-03-25T14:29:34.9857151Z -- Fixing pkgconfig file: /azp/_work/1/s/vcpkg/packages/openblas_x64-linux/debug/lib/pkgconfig/openblas.pc
2025-03-25T14:29:34.9924719Z -- Installing: /azp/_work/1/s/vcpkg/packages/openblas_x64-linux/share/openblas/copyright
2025-03-25T14:29:35.0050109Z -- Adjusted RPATH of '/azp/_work/1/s/vcpkg/packages/openblas_x64-linux/tools/openblas/getarch' (From '' -> To '$ORIGIN:$ORIGIN/../../lib')
2025-03-25T14:29:35.0098711Z -- Adjusted RPATH of '/azp/_work/1/s/vcpkg/packages/openblas_x64-linux/tools/openblas/getarch_2nd' (From '' -> To '$ORIGIN:$ORIGIN/../../lib')
2025-03-25T14:29:35.0157995Z -- Performing post-build validation
2025-03-25T14:29:35.0221332Z Elapsed time to handle openblas:x64-linux: 3.9 min
2025-03-25T14:29:35.0222505Z openblas:x64-linux package ABI: 5fd57cdbc85279845fa4392a092dd5c12ba35c52385007256b8fabed304fc8e6
2025-03-25T14:29:35.0223004Z Installing 96/118 openblas:[email protected]...
2025-03-25T14:29:35.0223477Z Building openblas:[email protected]...
2025-03-25T14:29:35.0224002Z /azp/_work/1/s/vcpkg/triplets/community/arm64-linux.cmake: info: loaded community triplet from here. Community triplets are not built in the curated registry and are thus less likely to succeed.
2025-03-25T14:29:35.0224309Z /root/.cache/vcpkg/registries/git-trees/653ab9ede4c3c8b556b5d1b8b7d98d6abab8ef9d: info: installing overlay port from here
2025-03-25T14:29:35.1683883Z -- Using cached OpenMathLib-OpenBLAS-v0.3.27.tar.gz.
2025-03-25T14:29:35.2316625Z -- Cleaning sources at /azp/_work/1/s/vcpkg/buildtrees/openblas/src/v0.3.27-b066c33329.clean. Use --editable to skip cleaning for the packages you specify.
2025-03-25T14:29:35.5906915Z -- Extracting source /azp/_work/1/s/vcpkg/downloads/OpenMathLib-OpenBLAS-v0.3.27.tar.gz
2025-03-25T14:29:36.5277436Z -- Applying patch uwp.patch
2025-03-25T14:29:36.5332913Z -- Applying patch fix-redefinition-function.patch
2025-03-25T14:29:36.5379402Z -- Applying patch install-tools.patch
2025-03-25T14:29:36.5428261Z -- Using source at /azp/_work/1/s/vcpkg/buildtrees/openblas/src/v0.3.27-b066c33329.clean
2025-03-25T14:29:36.5521886Z -- Configuring arm64-linux
2025-03-25T14:29:38.5231846Z -- Building arm64-linux-dbg
2025-03-25T14:31:13.5942283Z -- Building arm64-linux-rel
2025-03-25T14:33:51.7276091Z -- Fixing pkgconfig file: /azp/_work/1/s/vcpkg/packages/openblas_arm64-linux/lib/pkgconfig/openblas.pc
2025-03-25T14:33:51.7352471Z -- Fixing pkgconfig file: /azp/_work/1/s/vcpkg/packages/openblas_arm64-linux/debug/lib/pkgconfig/openblas.pc
2025-03-25T14:33:51.7470606Z -- Installing: /azp/_work/1/s/vcpkg/packages/openblas_arm64-linux/share/openblas/copyright
2025-03-25T14:33:51.7488579Z -- Performing post-build validation
2025-03-25T14:33:51.7585097Z Elapsed time to handle openblas:arm64-linux: 4.3 min
2025-03-25T14:33:51.7592411Z openblas:arm64-linux package ABI: 4b2ef634d166d0b2321b8d4738ad119cf3b2ba426fa6e5c753b4b3314517ac4c
2025-03-25T14:33:51.7599167Z Installing 97/118 blas:arm64-linux@2023-04-14...
2025-03-25T14:33:51.7605671Z Building blas:arm64-linux@2023-04-14...
2025-03-25T14:33:51.7611372Z /azp/_work/1/s/vcpkg/triplets/community/arm64-linux.cmake: info: loaded community triplet from here. Community triplets are not built in the curated registry and are thus less likely to succeed.
2025-03-25T14:33:51.7617163Z /root/.cache/vcpkg/registries/git-trees/02dbca6ca7e22e44f5445b10f74e63644779eefd: info: installing overlay port from here
2025-03-25T14:33:51.7872002Z -- Skipping post-build validation due to VCPKG_POLICY_EMPTY_PACKAGE
2025-03-25T14:33:51.7970936Z Elapsed time to handle blas:arm64-linux: 35.7 ms
2025-03-25T14:33:51.7971176Z blas:arm64-linux package ABI: cd2022c65c73b1df8136c790231402dfb3b153acf34ad2e15a2ec020aff68b82
2025-03-25T14:33:51.7971389Z Installing 98/118 lapack-reference[blas-select,core,noblas]:[email protected]#5...
2025-03-25T14:33:51.7971669Z Building lapack-reference[blas-select,core,noblas]:[email protected]#5...
2025-03-25T14:33:51.7971935Z /azp/_work/1/s/vcpkg/triplets/community/arm64-linux.cmake: info: loaded community triplet from here. Community triplets are not built in the curated registry and are thus less likely to succeed.
2025-03-25T14:33:51.7972244Z /root/.cache/vcpkg/registries/git-trees/27fda0472d5bfb11fef0264ba62681f6d6b4b1d2: info: installing overlay port from here
2025-03-25T14:33:51.8276040Z Downloading Reference-LAPACK-lapack-v3.11.0.tar.gz
2025-03-25T14:33:52.5334984Z Successfully downloaded Reference-LAPACK-lapack-v3.11.0.tar.gz.
2025-03-25T14:33:52.7830639Z -- Extracting source /azp/_work/1/s/vcpkg/downloads/Reference-LAPACK-lapack-v3.11.0.tar.gz
2025-03-25T14:33:53.2197190Z -- Applying patch cmake-config.patch
2025-03-25T14:33:53.2253779Z -- Applying patch lapacke.patch
2025-03-25T14:33:53.2311239Z -- Applying patch fix_prefix.patch
2025-03-25T14:33:53.2418416Z -- Using source at /azp/_work/1/s/vcpkg/buildtrees/lapack-reference/src/v3.11.0-6ae738f586.clean
2025-03-25T14:33:53.3459574Z -- The Fortran compiler identification is GNU 12.3.0
2025-03-25T14:33:53.3787427Z -- Configuring arm64-linux
2025-03-25T14:33:57.7057368Z CMake Error at scripts/cmake/vcpkg_execute_required_process.cmake:127 (message):
2025-03-25T14:33:57.7058088Z     Command failed: /azp/_work/1/s/vcpkg/downloads/tools/ninja/1.10.2-linux/ninja -v
2025-03-25T14:33:57.7108129Z     Working Directory: /azp/_work/1/s/vcpkg/buildtrees/lapack-reference/arm64-linux-rel/vcpkg-parallel-configure
2025-03-25T14:33:57.7108380Z     Error code: 1
2025-03-25T14:33:57.7108540Z     See logs for more information:
2025-03-25T14:33:57.7108883Z       /azp/_work/1/s/vcpkg/buildtrees/lapack-reference/config-arm64-linux-dbg-CMakeCache.txt.log
2025-03-25T14:33:57.7109148Z       /azp/_work/1/s/vcpkg/buildtrees/lapack-reference/config-arm64-linux-rel-CMakeCache.txt.log
2025-03-25T14:33:57.7109887Z       /azp/_work/1/s/vcpkg/buildtrees/lapack-reference/config-arm64-linux-out.log
2025-03-25T14:33:57.7110013Z 
2025-03-25T14:33:57.7110162Z Call Stack (most recent call first):
2025-03-25T14:33:57.7110410Z   /azp/_work/1/s/vcpkg_installed/x64-linux/share/vcpkg-cmake/vcpkg_cmake_configure.cmake:252 (vcpkg_execute_required_process)
2025-03-25T14:33:57.7110654Z   /root/.cache/vcpkg/registries/git-trees/27fda0472d5bfb11fef0264ba62681f6d6b4b1d2/portfile.cmake:59 (vcpkg_cmake_configure)
2025-03-25T14:33:57.7110884Z   scripts/ports.cmake:196 (include)
2025-03-25T14:33:57.7110973Z 
2025-03-25T14:33:57.7111054Z 
2025-03-25T14:33:57.7111224Z error: building lapack-reference:arm64-linux failed with: BUILD_FAILED
2025-03-25T14:33:57.7111479Z See https://learn.microsoft.com/vcpkg/troubleshoot/build-failures?WT.mc_id=vcpkg_inproduct_cli for more information.
2025-03-25T14:33:57.7111699Z Elapsed time to handle lapack-reference:arm64-linux: 5.9 s
2025-03-25T14:33:57.7333450Z Please ensure you're using the latest port files with `git pull` and `vcpkg update`.
2025-03-25T14:33:57.7334200Z Then check for known issues at:
2025-03-25T14:33:57.7334626Z   https://github.com/microsoft/vcpkg/issues?q=is%3Aissue+is%3Aopen+in%3Atitle+lapack-reference
2025-03-25T14:33:57.7335291Z You can submit a new issue at:
2025-03-25T14:33:57.7362241Z   https://github.com/microsoft/vcpkg/issues/new?title=[lapack-reference]+Build+error+on+arm64-linux&body=Copy+issue+body+from+%2Fazp%2F_work%2F1%2Fs%2Fvcpkg_installed%2Fvcpkg%2Fissue_body.md
2025-03-25T14:33:57.7363013Z 
2025-03-25T14:33:57.9665896Z 
2025-03-25T14:33:57.9739296Z ##[error]Bash exited with code '1'.
2025-03-25T14:33:57.9849857Z ##[section]Finishing: Install packages

config-arm64-linux-out.log

[1/2] "/azp/_work/1/s/vcpkg/downloads/tools/cmake-3.30.1-linux/cmake-3.30.1-linux-x86_64/bin/cmake" -E chdir "../../arm64-linux-dbg" "/azp/_work/1/s/vcpkg/downloads/tools/cmake-3.30.1-linux/cmake-3.30.1-linux-x86_64/bin/cmake" "/azp/_work/1/s/vcpkg/buildtrees/lapack-reference/src/v3.11.0-6ae738f586.clean" "-G" "Ninja" "-DCMAKE_BUILD_TYPE=Debug" "-DCMAKE_INSTALL_PREFIX=/azp/_work/1/s/vcpkg/packages/lapack-reference_arm64-linux/debug" "-DFETCHCONTENT_FULLY_DISCONNECTED=ON" "-DUSE_OPTIMIZED_BLAS=ON" "-DCMAKE_REQUIRE_FIND_PACKAGE_BLAS=ON" "-DCBLAS=OFF" "-DTEST_FORTRAN_COMPILER=OFF" "-DCMAKE_MAKE_PROGRAM=/azp/_work/1/s/vcpkg/downloads/tools/ninja/1.10.2-linux/ninja" "-DCMAKE_SYSTEM_NAME=Linux" "-DBUILD_SHARED_LIBS=OFF" "-DVCPKG_CHAINLOAD_TOOLCHAIN_FILE=/azp/_work/1/s/vcpkg/scripts/toolchains/linux.cmake" "-DVCPKG_TARGET_TRIPLET=arm64-linux" "-DVCPKG_SET_CHARSET_FLAG=ON" "-DVCPKG_PLATFORM_TOOLSET=external" "-DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY=ON" "-DCMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP=TRUE" "-DCMAKE_VERBOSE_MAKEFILE=ON" "-DVCPKG_APPLOCAL_DEPS=OFF" "-DCMAKE_TOOLCHAIN_FILE=/azp/_work/1/s/vcpkg/scripts/buildsystems/vcpkg.cmake" "-DCMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION=ON" "-DVCPKG_CXX_FLAGS=" "-DVCPKG_CXX_FLAGS_RELEASE=" "-DVCPKG_CXX_FLAGS_DEBUG=" "-DVCPKG_C_FLAGS=" "-DVCPKG_C_FLAGS_RELEASE=" "-DVCPKG_C_FLAGS_DEBUG=" "-DVCPKG_CRT_LINKAGE=dynamic" "-DVCPKG_LINKER_FLAGS=" "-DVCPKG_LINKER_FLAGS_RELEASE=" "-DVCPKG_LINKER_FLAGS_DEBUG=" "-DVCPKG_TARGET_ARCHITECTURE=arm64" "-DCMAKE_INSTALL_LIBDIR:STRING=lib" "-DCMAKE_INSTALL_BINDIR:STRING=bin" "-D_VCPKG_ROOT_DIR=/azp/_work/1/s/vcpkg" "-D_VCPKG_INSTALLED_DIR=/azp/_work/1/s/vcpkg_installed" "-DVCPKG_MANIFEST_INSTALL=OFF"
...
-- Looking for Fortran sgemm
-- Looking for Fortran sgemm - not found
CMake Error at /azp/_work/1/s/vcpkg/downloads/tools/cmake-3.30.1-linux/cmake-3.30.1-linux-x86_64/share/cmake-3.30/Modules/FindPackageHandleStandardArgs.cmake:233 (message):
  Could NOT find BLAS (missing: BLAS_LIBRARIES)
Call Stack (most recent call first):
  /azp/_work/1/s/vcpkg/downloads/tools/cmake-3.30.1-linux/cmake-3.30.1-linux-x86_64/share/cmake-3.30/Modules/FindPackageHandleStandardArgs.cmake:603 (_FPHSA_FAILURE_MESSAGE)
  /azp/_work/1/s/vcpkg/downloads/tools/cmake-3.30.1-linux/cmake-3.30.1-linux-x86_64/share/cmake-3.30/Modules/FindBLAS.cmake:1417 (find_package_handle_standard_args)
  /azp/_work/1/s/vcpkg_installed/arm64-linux/share/blas/vcpkg-cmake-wrapper.cmake:7 (_find_package)
  /azp/_work/1/s/vcpkg/scripts/buildsystems/vcpkg.cmake:813 (include)
  CMakeLists.txt:321 (find_package)

Additional context

Similar issue (I believe): Reference-LAPACK/lapack#1109
@stemann stemann added the category:port-bug The issue is with a library, which is something the port should already support label Mar 25, 2025
@stemann stemann changed the title lapack-reference build failure for triplet arm64-linux when cross-compiling from x64-linux [lapack-reference] build failure for triplet arm64-linux when cross-compiling from x64-linux Mar 25, 2025
@JonLiu1993 JonLiu1993 added category:community-triplet A PR or issue related to community triplets not officially validated by the vcpkg team. and removed category:port-bug The issue is with a library, which is something the port should already support labels Mar 26, 2025
@JonLiu1993 JonLiu1993 removed their assignment Mar 26, 2025
@stemann
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stemann commented Mar 26, 2025 •
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For reference, lapack-reference[blas-select,core,noblas]:[email protected]#5 configures (and builds) just fine on host arm64-linux:

[1/2] "/usr/bin/cmake" -E chdir "../../arm64-linux-dbg" "/usr/bin/cmake" "/workspaces/vcpkg_registry/vcpkg/buildtrees/lapack-reference/src/v3.11.0-6ae738f586.clean" "-G" "Ninja" "-DCMAKE_BUILD_TYPE=Debug" "-DCMAKE_INSTALL_PREFIX=/workspaces/vcpkg_registry/vcpkg/packages/lapack-reference_arm64-linux/debug" "-DFETCHCONTENT_FULLY_DISCONNECTED=ON" "-DUSE_OPTIMIZED_BLAS=ON" "-DCMAKE_REQUIRE_FIND_PACKAGE_BLAS=ON" "-DCBLAS=OFF" "-DTEST_FORTRAN_COMPILER=OFF" "-DCMAKE_MAKE_PROGRAM=/usr/bin/ninja" "-DCMAKE_SYSTEM_NAME=Linux" "-DBUILD_SHARED_LIBS=OFF" "-DVCPKG_CHAINLOAD_TOOLCHAIN_FILE=/workspaces/vcpkg_registry/vcpkg/scripts/toolchains/linux.cmake" "-DVCPKG_TARGET_TRIPLET=arm64-linux" "-DVCPKG_SET_CHARSET_FLAG=ON" "-DVCPKG_PLATFORM_TOOLSET=external" "-DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=ON" "-DCMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY=ON" "-DCMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP=TRUE" "-DCMAKE_VERBOSE_MAKEFILE=ON" "-DVCPKG_APPLOCAL_DEPS=OFF" "-DCMAKE_TOOLCHAIN_FILE=/workspaces/vcpkg_registry/vcpkg/scripts/buildsystems/vcpkg.cmake" "-DCMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION=ON" "-DVCPKG_CXX_FLAGS=" "-DVCPKG_CXX_FLAGS_RELEASE=" "-DVCPKG_CXX_FLAGS_DEBUG=" "-DVCPKG_C_FLAGS=" "-DVCPKG_C_FLAGS_RELEASE=" "-DVCPKG_C_FLAGS_DEBUG=" "-DVCPKG_CRT_LINKAGE=dynamic" "-DVCPKG_LINKER_FLAGS=" "-DVCPKG_LINKER_FLAGS_RELEASE=" "-DVCPKG_LINKER_FLAGS_DEBUG=" "-DVCPKG_TARGET_ARCHITECTURE=arm64" "-DCMAKE_INSTALL_LIBDIR:STRING=lib" "-DCMAKE_INSTALL_BINDIR:STRING=bin" "-D_VCPKG_ROOT_DIR=/workspaces/vcpkg_registry/vcpkg" "-D_VCPKG_INSTALLED_DIR=/workspaces/vcpkg_registry/vcpkg_installed" "-DVCPKG_MANIFEST_INSTALL=OFF"
-- The Fortran compiler identification is GNU 12.3.0
-- The C compiler identification is GNU 12.3.0
...
-- Looking for Fortran sgemm
-- Looking for Fortran sgemm - found
-- Found BLAS: /workspaces/vcpkg_registry/vcpkg_installed/arm64-linux/lib/libopenblas.a  
-- Using supplied NETLIB LAPACK implementation
-- Build html documentation: OFF
-- Build man documentation: OFF
-- Configuring done
-- Generating done

config-arm64-linux-out.log

@stemann stemann mentioned this issue Mar 26, 2025
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@martin-frbg
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Seems to me that the vcpkg script is trying to build Reference-LAPACK using an optimized BLAS like ATLAS or OpenBLAS (-DUSE_OPTIMIZED_BLAS=ON) but fails to find one already installed (likely due to this being a cross-compilation) ?

@stemann
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stemann commented Mar 26, 2025 •
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Yes, that is the issue: find_package(BLAS) fails - in spite of OpenBLAS having just been built (it's in the log above: openblas:[email protected]).

@stemann
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stemann commented Mar 26, 2025 •
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The strange thing is that I do have libopenblas.a right there in /workspaces/vcpkg_registry/vcpkg_installed/arm64-linux/lib/libopenblas.a.

I'm trying to

  1. Define BLAS_LIBRARIES, e.g. -DBLAS_LIBRARIES=/workspaces/vcpkg_registry/vcpkg_installed/arm64-linux/lib/libopenblas.a - but lapack-cmake does not find the dgemm-symbol - perhaps the Julia Yggdrasil hand-rolled magic approach is necessary, i.e., -DCMAKE_Fortran_FLAGS="-DDGEMM=DGEMM_64"...
  2. Define CMAKE_FIND_ROOT_PATH, e.g. -DCMAKE_FIND_ROOT_PATH=/workspaces/vcpkg_registry/vcpkg_installed/arm64-linux.

@stemann
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stemann commented Mar 26, 2025 •
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It seems the issue is that FindBLAS is not content with the sgemm in the found libopenblas.a:

-- Looking for Fortran sgemm - not found

$ grep -C 1 -i blas vcpkg/buildtrees/lapack-reference/config-arm64-linux-dbg-CMakeCache.txt.log 

//Path to a library.
BLAS_openblas_LIBRARY:FILEPATH=/workspaces/vcpkg_registry/vcpkg_installed/arm64-linux/debug/lib/libopenblas.a

--
//No help, variable specified on the command line.
CBLAS:UNINITIALIZED=OFF

--
//No help, variable specified on the command line.
CMAKE_REQUIRE_FIND_PACKAGE_BLAS:UNINITIALIZED=ON

--

//Whether or not to use an optimized BLAS library instead of included
// netlib BLAS
USE_OPTIMIZED_BLAS:BOOL=ON

--

//ADVANCED property for variable: BLAS_openblas_LIBRARY
BLAS_openblas_LIBRARY-ADVANCED:INTERNAL=1
//Have Fortran function sgemm
BLAS_openblas_WORKS:INTERNAL=
//Have Fortran function sgemm
BLAS_openblas_deps_WORKS:INTERNAL=
//ADVANCED property for variable: CMAKE_ADDR2LINE

$ grep -C 1 -i blas vcpkg/buildtrees/lapack-reference/config-arm64-linux-rel-CMakeCache.txt.log

//Path to a library.
BLAS_openblas_LIBRARY:FILEPATH=/workspaces/vcpkg_registry/vcpkg_installed/arm64-linux/lib/libopenblas.a

--
//No help, variable specified on the command line.
CBLAS:UNINITIALIZED=OFF

--
//No help, variable specified on the command line.
CMAKE_REQUIRE_FIND_PACKAGE_BLAS:UNINITIALIZED=ON

--

//Whether or not to use an optimized BLAS library instead of included
// netlib BLAS
USE_OPTIMIZED_BLAS:BOOL=ON

--

//ADVANCED property for variable: BLAS_openblas_LIBRARY
BLAS_openblas_LIBRARY-ADVANCED:INTERNAL=1
//Have Fortran function sgemm
BLAS_openblas_WORKS:INTERNAL=
//Have Fortran function sgemm
BLAS_openblas_deps_WORKS:INTERNAL=
//ADVANCED property for variable: CMAKE_ADDR2LINE

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stemann commented Mar 26, 2025 •
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Solution: It seems to work by supplying -DBLA_PREFER_PKGCONFIG=1 (when targeting arm64-linux from x64-linux, using GCC 12 - from Ubuntu 22.04), cf. https://cmake.org/cmake/help/v3.30/module/FindBLAS.html#input-variables

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stemann commented Mar 26, 2025

… but vcpkg ended up producing an x86_64 liblapack.a …

This was referenced Mar 27, 2025
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stemann commented Mar 27, 2025

To some extent, it seems to work by defining a custom arm64-linux triplet defining VCPKG_CHAINLOAD_TOOLCHAIN_FILE

$ cat triplets/arm64-linux.cmake 
set(VCPKG_TARGET_ARCHITECTURE arm64)
set(VCPKG_CRT_LINKAGE dynamic)
set(VCPKG_LIBRARY_LINKAGE static)

set(VCPKG_CMAKE_SYSTEM_NAME Linux)

set(VCPKG_CHAINLOAD_TOOLCHAIN_FILE /opt/toolchains/arm64-linux-gnu.cmake)

where /opt/toolchains/arm64-linux-gnu.cmake contains:

set(CMAKE_HOST_SYSTEM_NAME Linux)
set(CMAKE_HOST_SYSTEM_PROCESSOR x86_64)
  
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR aarch64)

set(CMAKE_C_COMPILER   /usr/bin/aarch64-linux-gnu-gcc)
set(CMAKE_CXX_COMPILER /usr/bin/aarch64-linux-gnu-g++)
set(CMAKE_Fortran_COMPILER /usr/bin/aarch64-linux-gnu-gfortran)

set(CMAKE_LINKER  /usr/bin/aarch64-linux-gnu-ld)
set(CMAKE_OBJCOPY /usr/bin/aarch64-linux-gnu-objcopy)

set(CMAKE_AR     /usr/bin/aarch64-linux-gnu-ar)
set(CMAKE_NM     /usr/bin/aarch64-linux-gnu-nm)
set(CMAKE_RANLIB /usr/bin/aarch64-linux-gnu-ranlib)

Notably to define CMAKE_Fortran_COMPILER, cf. #44653 .

Although icu (a further dependency in my case) is hard to build - seems to require export QEMU_LD_PREFIX=/usr/aarch64-linux-gnu...

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