I'm trying to install cvxpy using pip install but am running into an error when preparing the metadata. My current Python version is 3.13.0, and I am on Windows 11. Note that I do not have Conda.
Below is the error I encounter:
C:\Users\devap>pip install cvxpy
Collecting cvxpy
Using cached cvxpy-1.6.0-cp313-cp313-win_amd64.whl.metadata (9.4 kB)
Collecting osqp>=0.6.2 (from cvxpy)
Using cached osqp-0.6.7.post3-cp313-cp313-win_amd64.whl.metadata (2.0 kB)
Collecting clarabel>=0.5.0 (from cvxpy)
Using cached clarabel-0.9.0-cp37-abi3-win_amd64.whl.metadata (4.8 kB)
Collecting scs>=3.2.4.post1 (from cvxpy)
Using cached scs-3.2.7.tar.gz (1.6 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... done
Installing backend dependencies ... done
Preparing metadata (pyproject.toml) ... error
error: subprocess-exited-with-error
× Preparing metadata (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [31 lines of output]
+ meson setup C:\Users\devap\AppData\Local\Temp\pip-install-93vr0jcn\scs_5d6757b4a018456a9eafc172d72fa671 C:\Users\devap\AppData\Local\Temp\pip-install-93vr0jcn\scs_5d6757b4a018456a9eafc172d72fa671\.mesonpy-uwreejb1 -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md --native-file=C:\Users\devap\AppData\Local\Temp\pip-install-93vr0jcn\scs_5d6757b4a018456a9eafc172d72fa671\.mesonpy-uwreejb1\meson-python-native-file.ini
The Meson build system
Version: 1.6.0
Source dir: C:\Users\devap\AppData\Local\Temp\pip-install-93vr0jcn\scs_5d6757b4a018456a9eafc172d72fa671
Build dir: C:\Users\devap\AppData\Local\Temp\pip-install-93vr0jcn\scs_5d6757b4a018456a9eafc172d72fa671\.mesonpy-uwreejb1
Build type: native build
WARNING: Project does not target a minimum version but uses feature introduced in '1.1': meson.options file. Use meson_options.txt instead
Project name: scs
Project version: undefined
Activating VS 17.12.2
C compiler for the host machine: cl (msvc 19.42.34435 "Microsoft (R) C/C++ Optimizing Compiler Version 19.42.34435 for x64")
C linker for the host machine: link link 14.42.34435.0
Host machine cpu family: x86_64
Host machine cpu: x86_64
Program python found: YES (C:\Users\devap\AppData\Local\Programs\Python\Python313\python.exe)
Library openblas found: NO
Did not find pkg-config by name 'pkg-config'
Found pkg-config: NO
Found CMake: C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.EXE (3.29.5)
Run-time dependency openblas found: NO (tried pkgconfig and cmake)
Run-time dependency openblas found: NO (tried pkgconfig and cmake)
Library blas found: NO
Run-time dependency blas found: NO (tried pkgconfig and cmake)
Library lapack found: NO
Run-time dependency lapack found: NO (tried pkgconfig and cmake)
Library cblas found: NO
Run-time dependency cblas found: NO (tried pkgconfig and cmake)
..\meson.build:48:4: ERROR: Problem encountered: OpenBLAS or Netlib BLAS/CBLAS is required on all platforms except Windows, and was not found.
A full log can be found at C:\Users\devap\AppData\Local\Temp\pip-install-93vr0jcn\scs_5d6757b4a018456a9eafc172d72fa671\.mesonpy-uwreejb1\meson-logs\meson-log.txt
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed
× Encountered error while generating package metadata.
╰─> See above for output.
note: This is an issue with the package mentioned above, not pip.
I tried doing pip install meson thinking that it would solve the issue with the "Project does not target a minimum version but uses feature introduced in '1.1'" error, but that didn't help. I've also installed Build Tools as per the guide here: cvxpy_guide. It seems to be erroring when trying to install SCS, but I am unsure of what to do to actually fix this issue.
Ultimately, I just used conda to install cvxpy. Not too sure what was wrong with trying to install scs; I kept on running into the following error even after installing OpenBlas/Blas/etc. and making sure everything is up-to-date (pip, meson, numpy, scipy, etc.). For some reason, pkgconfig and cmake weren't able to detect OpenBlas:
Collecting scs
Using cached scs-3.2.7.tar.gz (1.6 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... done
Installing backend dependencies ... done
Preparing metadata (pyproject.toml) ... error
error: subprocess-exited-with-error
× Preparing metadata (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [124 lines of output]
+ meson setup C:\Users\devap\AppData\Local\Temp\pip-install-xw02b6ez\scs_da18bfd1c5e34f979872cf539352c02d C:\Users\devap\AppData\Local\Temp\pip-install-xw02b6ez\scs_da18bfd1c5e34f979872cf539352c02d\.mesonpy-5d8xc6p2 -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md --native-file=C:\Users\devap\AppData\Local\Temp\pip-install-xw02b6ez\scs_da18bfd1c5e34f979872cf539352c02d\.mesonpy-5d8xc6p2\meson-python-native-file.ini
The Meson build system
Version: 1.6.0
Source dir: C:\Users\devap\AppData\Local\Temp\pip-install-xw02b6ez\scs_da18bfd1c5e34f979872cf539352c02d
Build dir: C:\Users\devap\AppData\Local\Temp\pip-install-xw02b6ez\scs_da18bfd1c5e34f979872cf539352c02d\.mesonpy-5d8xc6p2
Build type: native build
WARNING: Project does not target a minimum version but uses feature introduced in '1.1': meson.options file. Use meson_options.txt instead
Project name: scs
Project version: undefined
Activating VS 17.12.2
C compiler for the host machine: cl (msvc 19.42.34435 "Microsoft (R) C/C++ Optimizing Compiler Version 19.42.34435 for x64")
C linker for the host machine: link link 14.42.34435.0
Host machine cpu family: x86_64
Host machine cpu: x86_64
Program python found: YES (C:\Users\devap\AppData\Local\Programs\Python\Python313\python.exe)
Library openblas found: NO
Found pkg-config: YES (C:\Users\devap\pkg-configs\pkg-config.EXE) 0.26
Found CMake: C:\Program Files\CMake\bin\cmake.EXE (3.31.1)
Run-time dependency openblas found: NO (tried pkgconfig and cmake)
Run-time dependency openblas found: NO (tried pkgconfig and cmake)
Library blas found: NO
Run-time dependency blas found: YES
Library lapack found: NO
Run-time dependency lapack found: NO (tried pkgconfig and cmake)
Library cblas found: NO
Run-time dependency cblas found: NO (tried pkgconfig and cmake)
Compiler for C supports arguments -Wno-unused-result: NO
Run-time dependency python found: YES 3.13
Build targets in project: 2
WARNING: Project specifies no minimum version but uses features which were added in versions:
* 1.1: {'meson.options file'}
scs undefined
User defined options
Native files: C:\Users\devap\AppData\Local\Temp\pip-install-xw02b6ez\scs_da18bfd1c5e34f979872cf539352c02d\.mesonpy-5d8xc6p2\meson-python-native-file.ini
b_ndebug : if-release
b_vscrt : md
buildtype : release
Found ninja.EXE-1.11.1.git.kitware.jobserver-1 at C:\Users\devap\AppData\Local\Temp\pip-build-env-wyjerr1r\normal\Scripts\ninja.EXE
+ meson compile
[1/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_scs_version.c.obj
[2/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_normalize.c.obj
[3/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_aa.c.obj
[4/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_exp_cone.c.obj
[5/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_linalg.c.obj
[6/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_cpu_direct_private.c.obj
[7/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_csparse.c.obj
[8/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_scspy.c.obj
[9/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_ctrlc.c.obj
[10/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_global.c.obj
[11/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_1.c.obj
[12/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_aat.c.obj
../scs_source/linsys/external/amd/amd_aat.c(176): warning C4244: '=': conversion from 'scs_int' to 'scs_float', possible loss of data
../scs_source/linsys/external/amd/amd_aat.c(177): warning C4244: '=': conversion from 'scs_int' to 'scs_float', possible loss of data
../scs_source/linsys/external/amd/amd_aat.c(179): warning C4244: '=': conversion from 'scs_int' to 'scs_float', possible loss of data
../scs_source/linsys/external/amd/amd_aat.c(180): warning C4244: '=': conversion from 'size_t' to 'scs_float', possible loss of data
[13/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_defaults.c.obj
[14/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_rw.c.obj
[15/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_util.c.obj
[16/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_control.c.obj
[17/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_qdldl_qdldl.c.obj
[18/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_scs_matrix.c.obj
[19/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_dump.c.obj
[20/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_scs.c.obj
[21/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_cones.c.obj
[22/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_2.c.obj
../scs_source/linsys/external/amd/amd_2.c(603): warning C4244: '=': conversion from 'scs_float' to 'scs_int', possible loss of data
../scs_source/linsys/external/amd/amd_2.c(1525): warning C4244: '=': conversion from 'scs_int' to 'scs_float', possible loss of data
../scs_source/linsys/external/amd/amd_2.c(1526): warning C4244: '=': conversion from 'scs_int' to 'scs_float', possible loss of data
../scs_source/linsys/external/amd/amd_2.c(1563): warning C4244: '=': conversion from 'scs_int' to 'scs_float', possible loss of data
../scs_source/linsys/external/amd/amd_2.c(1593): warning C4244: '=': conversion from 'scs_int' to 'scs_float', possible loss of data
../scs_source/linsys/external/amd/amd_2.c(1599): warning C4244: '=': conversion from 'scs_int' to 'scs_float', possible loss of data
[23/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_postorder.c.obj
[24/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_preprocess.c.obj
[25/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_order.c.obj
../scs_source/linsys/external/amd/amd_order.c(47): warning C4244: '=': conversion from 'scs_int' to 'scs_float', possible loss of data
../scs_source/linsys/external/amd/amd_order.c(66): warning C4244: '=': conversion from 'scs_int' to 'scs_float', possible loss of data
../scs_source/linsys/external/amd/amd_order.c(197): warning C4244: '=': conversion from 'scs_int' to 'scs_float', possible loss of data
[26/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_post_tree.c.obj
[27/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_info.c.obj
[28/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_SuiteSparse_config.c.obj
[29/45] Compiling C object _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_valid.c.obj
[30/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_src_aa.c.obj
[31/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_src_exp_cone.c.obj
[32/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_scspy.c.obj
[33/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_src_linalg.c.obj
[34/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_src_scs_version.c.obj
[35/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_src_normalize.c.obj
[36/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_src_ctrlc.c.obj
[37/45] Linking target _scs_direct.cp313-win_amd64.pyd
FAILED: _scs_direct.cp313-win_amd64.pyd
"link" /MACHINE:x64 /OUT:_scs_direct.cp313-win_amd64.pyd _scs_direct.cp313-win_amd64.pyd.p/scs_scspy.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_cpu_direct_private.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_aa.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_cones.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_ctrlc.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_exp_cone.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_linalg.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_normalize.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_rw.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_scs_version.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_scs.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_src_util.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_scs_matrix.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_csparse.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_qdldl_qdldl.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_1.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_2.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_aat.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_control.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_defaults.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_dump.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_global.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_info.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_order.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_post_tree.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_postorder.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_preprocess.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_amd_valid.c.obj _scs_direct.cp313-win_amd64.pyd.p/scs_source_linsys_external_amd_SuiteSparse_config.c.obj "/release" "/nologo" "/OPT:REF" "/DLL" "/IMPLIB:_scs_direct.cp313-win_amd64.lib" "C:\Users\devap\AppData\Local\Programs\Python\Python313\libs\python313.lib" "kernel32.lib" "user32.lib" "gdi32.lib" "winspool.lib" "shell32.lib" "ole32.lib" "oleaut32.lib" "uuid.lib" "comdlg32.lib" "advapi32.lib"
Creating library _scs_direct.cp313-win_amd64.lib and object _scs_direct.cp313-win_amd64.exp
scs_source_src_aa.c.obj : error LNK2019: unresolved external symbol dnrm2_ referenced in function aa_safeguard
scs_source_src_linalg.c.obj : error LNK2001: unresolved external symbol dnrm2_
scs_source_src_aa.c.obj : error LNK2019: unresolved external symbol daxpy_ referenced in function aa_apply
scs_source_src_linalg.c.obj : error LNK2001: unresolved external symbol daxpy_
scs_source_src_aa.c.obj : error LNK2019: unresolved external symbol dgemv_ referenced in function relax
scs_source_src_aa.c.obj : error LNK2019: unresolved external symbol dgesv_ referenced in function solve
scs_source_src_aa.c.obj : error LNK2019: unresolved external symbol dgemm_ referenced in function set_m
scs_source_src_aa.c.obj : error LNK2019: unresolved external symbol dscal_ referenced in function relax
scs_source_src_cones.c.obj : error LNK2001: unresolved external symbol dscal_
scs_source_src_linalg.c.obj : error LNK2001: unresolved external symbol dscal_
scs_source_src_cones.c.obj : error LNK2019: unresolved external symbol dsyev_ referenced in function _scs_init_cone
scs_source_src_cones.c.obj : error LNK2019: unresolved external symbol dsyrk_ referenced in function proj_semi_definite_cone
scs_source_src_linalg.c.obj : error LNK2019: unresolved external symbol ddot_ referenced in function _scs_dot
scs_source_src_linalg.c.obj : error LNK2019: unresolved external symbol idamax_ referenced in function _scs_norm_inf
_scs_direct.cp313-win_amd64.pyd : fatal error LNK1120: 10 unresolved externals
[38/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_linsys_cpu_indirect_private.c.obj
[39/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_linsys_csparse.c.obj
[40/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_src_cones.c.obj
[41/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_src_rw.c.obj
[42/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_src_util.c.obj
[43/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_linsys_scs_matrix.c.obj
[44/45] Compiling C object _scs_indirect.cp313-win_amd64.pyd.p/scs_source_src_scs.c.obj
ninja: build stopped: subcommand failed.
Activating VS 17.12.2
INFO: automatically activated MSVC compiler environment
INFO: autodetecting backend as ninja
INFO: calculating backend command to run: C:\Users\devap\AppData\Local\Temp\pip-build-env-wyjerr1r\normal\Scripts\ninja.EXE
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed
× Encountered error while generating package metadata.
╰─> See above for output.