BUG: Unable to build SciPy locally due to mysterious conflation between scipy.signal and stdlib signal module

[steppi]

Describe your issue.

Following up from #20612 (comment),

Myself and @czgdp1807 both observed that we cannot build SciPy locally.

The full meson log appears here

Build started at 2024-05-13T16:20:13.739399
Main binary: /home/birbir/.virtualenvs/scipy-dev/bin/python
Build Options: -Dprefix=/home/birbir/scipy/build-install
Python system: Linux
The Meson build system
Version: 1.4.0
Source dir: /home/birbir/scipy
Build dir: /home/birbir/scipy/build
Build type: native build
Project name: scipy
Project version: 1.14.0.dev0
-----------
Detecting compiler via: `cc --version` -> 0
stdout:
cc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-----------
Running command: cc -E -dM -
-----
-----------
Detecting linker via: `cc -Wl,--version` -> 0
stdout:
GNU ld (GNU Binutils for Ubuntu) 2.38
Copyright (C) 2022 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.
-----------
stderr:
collect2 version 11.4.0
/usr/bin/ld -plugin /usr/lib/gcc/x86_64-linux-gnu/11/liblto_plugin.so -plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper -plugin-opt=-fresolution=/tmp/ccb9Qceu.res -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed -dynamic-linker /lib64/ld-linux-x86-64.so.2 -pie -z now -z relro /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/Scrt1.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/11/crtbeginS.o -L/usr/lib/gcc/x86_64-linux-gnu/11 -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../../lib -L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/11/../../.. --version -lgcc --push-state --as-needed -lgcc_s --pop-state -lc -lgcc --push-state --as-needed -lgcc_s --pop-state /usr/lib/gcc/x86_64-linux-gnu/11/crtendS.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crtn.o
-----------
Sanity testing C compiler: cc
Is cross compiler: False.
Sanity check compiler command line: cc sanitycheckc.c -o sanitycheckc.exe -D_FILE_OFFSET_BITS=64
Sanity check compile stdout:

-----
Sanity check compile stderr:

-----
Running test binary command:  /home/birbir/scipy/build/meson-private/sanitycheckc.exe
C compiler for the host machine: cc (gcc 11.4.0 "cc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0")
C linker for the host machine: cc ld.bfd 2.38
-----------
Detecting archiver via: `gcc-ar --version` -> 0
stdout:
GNU ar (GNU Binutils for Ubuntu) 2.38
Copyright (C) 2022 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) any later version.
This program has absolutely no warranty.
-----------
-----------
Detecting compiler via: `c++ --version` -> 0
stdout:
c++ (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-----------
Running command: c++ -E -dM -
-----
-----------
Detecting linker via: `c++ -Wl,--version` -> 0
stdout:
GNU ld (GNU Binutils for Ubuntu) 2.38
Copyright (C) 2022 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.
-----------
stderr:
collect2 version 11.4.0
/usr/bin/ld -plugin /usr/lib/gcc/x86_64-linux-gnu/11/liblto_plugin.so -plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper -plugin-opt=-fresolution=/tmp/ccsuoLNN.res -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc --build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed -dynamic-linker /lib64/ld-linux-x86-64.so.2 -pie -z now -z relro /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/Scrt1.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/11/crtbeginS.o -L/usr/lib/gcc/x86_64-linux-gnu/11 -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../../lib -L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/11/../../.. --version -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-linux-gnu/11/crtendS.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crtn.o
-----------
Sanity testing C++ compiler: c++
Is cross compiler: False.
Sanity check compiler command line: c++ sanitycheckcpp.cc -o sanitycheckcpp.exe -D_FILE_OFFSET_BITS=64
Sanity check compile stdout:

-----
Sanity check compile stderr:

-----
Running test binary command:  /home/birbir/scipy/build/meson-private/sanitycheckcpp.exe
C++ compiler for the host machine: c++ (gcc 11.4.0 "c++ (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0")
C++ linker for the host machine: c++ ld.bfd 2.38
-----------
Detecting compiler via: `cython -V` -> 0
stdout:
Cython version 3.0.10
-----------
stderr:
Cython version 3.0.10
-----------
Running compile:
Working directory:  /tmp/tmp3jfeh557
Code:
 print("hello world")
-----------
Command line: `cython /tmp/tmp3jfeh557/testfile.pyx -o /tmp/tmp3jfeh557/output.exe --fast-fail` -> 0
stderr:
/home/birbir/.virtualenvs/scipy-dev/lib/python3.11/site-packages/Cython/Compiler/Main.py:381: FutureWarning: Cython directive 'language_level' not set, using '3str' for now (Py3). This has changed from earlier releases! File: /tmp/tmp3jfeh557/testfile.pyx
  tree = Parsing.p_module(s, pxd, full_module_name)
-----------
Cython compiler for the host machine: cython (cython 3.0.10)
-----------
Detecting compiler via: `cc --version` -> 0
stdout:
cc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-----------
Running command: cc -E -dM -
-----
-----------
Detecting linker via: `cc -Wl,--version` -> 0
stdout:
GNU ld (GNU Binutils for Ubuntu) 2.38
Copyright (C) 2022 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.
-----------
stderr:
collect2 version 11.4.0
/usr/bin/ld -plugin /usr/lib/gcc/x86_64-linux-gnu/11/liblto_plugin.so -plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper -plugin-opt=-fresolution=/tmp/ccnYRgsm.res -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed -dynamic-linker /lib64/ld-linux-x86-64.so.2 -pie -z now -z relro /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/Scrt1.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/11/crtbeginS.o -L/usr/lib/gcc/x86_64-linux-gnu/11 -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../../lib -L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/11/../../.. --version -lgcc --push-state --as-needed -lgcc_s --pop-state -lc -lgcc --push-state --as-needed -lgcc_s --pop-state /usr/lib/gcc/x86_64-linux-gnu/11/crtendS.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crtn.o
-----------
Sanity testing C compiler: cc
Is cross compiler: False.
Sanity check compiler command line: cc sanitycheckc.c -o sanitycheckc.exe -D_FILE_OFFSET_BITS=64
Sanity check compile stdout:

-----
Sanity check compile stderr:

-----
Running test binary command:  /home/birbir/scipy/build/meson-private/sanitycheckc.exe
C compiler for the build machine: cc (gcc 11.4.0 "cc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0")
C linker for the build machine: cc ld.bfd 2.38
-----------
Detecting archiver via: `gcc-ar --version` -> 0
stdout:
GNU ar (GNU Binutils for Ubuntu) 2.38
Copyright (C) 2022 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) any later version.
This program has absolutely no warranty.
-----------
-----------
Detecting compiler via: `c++ --version` -> 0
stdout:
c++ (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-----------
Running command: c++ -E -dM -
-----
-----------
Detecting linker via: `c++ -Wl,--version` -> 0
stdout:
GNU ld (GNU Binutils for Ubuntu) 2.38
Copyright (C) 2022 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.
-----------
stderr:
collect2 version 11.4.0
/usr/bin/ld -plugin /usr/lib/gcc/x86_64-linux-gnu/11/liblto_plugin.so -plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper -plugin-opt=-fresolution=/tmp/ccbm3mbc.res -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc --build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed -dynamic-linker /lib64/ld-linux-x86-64.so.2 -pie -z now -z relro /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/Scrt1.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/11/crtbeginS.o -L/usr/lib/gcc/x86_64-linux-gnu/11 -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../../lib -L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/11/../../.. --version -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-linux-gnu/11/crtendS.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crtn.o
-----------
Sanity testing C++ compiler: c++
Is cross compiler: False.
Sanity check compiler command line: c++ sanitycheckcpp.cc -o sanitycheckcpp.exe -D_FILE_OFFSET_BITS=64
Sanity check compile stdout:

-----
Sanity check compile stderr:

-----
Running test binary command:  /home/birbir/scipy/build/meson-private/sanitycheckcpp.exe
C++ compiler for the build machine: c++ (gcc 11.4.0 "c++ (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0")
C++ linker for the build machine: c++ ld.bfd 2.38
-----------
Detecting compiler via: `cython -V` -> 0
stdout:
Cython version 3.0.10
-----------
stderr:
Cython version 3.0.10
-----------
Using cached compile:
Cached command line:  cython /tmp/tmp3jfeh557/testfile.pyx -o /tmp/tmp3jfeh557/output.exe --fast-fail 

Code:
 print("hello world")
Cached compiler stdout:
 
Cached compiler stderr:
 /home/birbir/.virtualenvs/scipy-dev/lib/python3.11/site-packages/Cython/Compiler/Main.py:381: FutureWarning: Cython directive 'language_level' not set, using '3str' for now (Py3). This has changed from earlier releases! File: /tmp/tmp3jfeh557/testfile.pyx
  tree = Parsing.p_module(s, pxd, full_module_name)

Cython compiler for the build machine: cython (cython 3.0.10)
Build machine cpu family: x86_64
Build machine cpu: x86_64
Host machine cpu family: x86_64
Host machine cpu: x86_64
Target machine cpu family: x86_64
Target machine cpu: x86_64
Program python3 found: YES (/home/birbir/.virtualenvs/scipy-dev/bin/python)
Searching for 'python-3.11' via pkgconfig lookup in LIBPC
Pkg-config binary missing from cross or native file, or env var undefined.
Trying a default Pkg-config fallback at pkg-config
Found pkg-config: YES (/usr/bin/pkg-config) 0.29.2
Determining dependency 'python-3.11' with pkg-config executable '/usr/bin/pkg-config'
env[PKG_CONFIG_LIBDIR]: /usr/local/lib/pkgconfig
env[PKG_CONFIG_PATH]: 
env[PKG_CONFIG]: /usr/bin/pkg-config
-----------
Called: `/usr/bin/pkg-config --modversion python-3.11` -> 0
stdout:
3.11
-----------
env[PKG_CONFIG_LIBDIR]: /usr/local/lib/pkgconfig
env[PKG_CONFIG_PATH]: 
env[PKG_CONFIG]: /usr/bin/pkg-config
-----------
Called: `/usr/bin/pkg-config --cflags python-3.11` -> 0
stdout:
-I/usr/local/include/python3.11
-----------
env[PKG_CONFIG_LIBDIR]: /usr/local/lib/pkgconfig
env[PKG_CONFIG_ALLOW_SYSTEM_LIBS]: 1
env[PKG_CONFIG_PATH]: 
env[PKG_CONFIG]: /usr/bin/pkg-config
-----------
Called: `/usr/bin/pkg-config --libs python-3.11` -> 0
env[PKG_CONFIG_LIBDIR]: /usr/local/lib/pkgconfig
env[PKG_CONFIG_PATH]: 
env[PKG_CONFIG]: /usr/bin/pkg-config
-----------
Called: `/usr/bin/pkg-config --libs python-3.11` -> 0
Run-time dependency python found: YES 3.11
Program cython found: YES (/home/birbir/.virtualenvs/scipy-dev/bin/cython)
Running compile:
Working directory:  /home/birbir/scipy/build/meson-private/tmpx2rbwzek
Code:
 extern int i;
int i;

-----------
Command line: `cc /home/birbir/scipy/build/meson-private/tmpx2rbwzek/testfile.c -o /home/birbir/scipy/build/meson-private/tmpx2rbwzek/output.obj -c -D_FILE_OFFSET_BITS=64 -O0 -Wunused-but-set-variable -Wno-unused-but-set-variable` -> 0
Compiler for C supports arguments -Wno-unused-but-set-variable: YES 
Running compile:
Working directory:  /home/birbir/scipy/build/meson-private/tmpaxh16bre
Code:
 extern int i;
int i;

-----------
Command line: `cc /home/birbir/scipy/build/meson-private/tmpaxh16bre/testfile.c -o /home/birbir/scipy/build/meson-private/tmpaxh16bre/output.obj -c -D_FILE_OFFSET_BITS=64 -O0 -Wunused-function -Wno-unused-function` -> 0
Compiler for C supports arguments -Wno-unused-function: YES 
Running compile:
Working directory:  /home/birbir/scipy/build/meson-private/tmpqduasscl
Code:
 extern int i;
int i;

-----------
Command line: `cc /home/birbir/scipy/build/meson-private/tmpqduasscl/testfile.c -o /home/birbir/scipy/build/meson-private/tmpqduasscl/output.obj -c -D_FILE_OFFSET_BITS=64 -O0 -Wconversion -Wno-conversion` -> 0
Compiler for C supports arguments -Wno-conversion: YES 
Running compile:
Working directory:  /home/birbir/scipy/build/meson-private/tmp8_m6wfk8
Code:
 extern int i;
int i;

-----------
Command line: `cc /home/birbir/scipy/build/meson-private/tmp8_m6wfk8/testfile.c -o /home/birbir/scipy/build/meson-private/tmp8_m6wfk8/output.obj -c -D_FILE_OFFSET_BITS=64 -O0 -Wmisleading-indentation -Wno-misleading-indentation` -> 0
Compiler for C supports arguments -Wno-misleading-indentation: YES 
Running compile:
Working directory:  /home/birbir/scipy/build/meson-private/tmpigvxa1u7
Code:
 int main(void) { return 0; }

-----------
Command line: `cc /home/birbir/scipy/build/meson-private/tmpigvxa1u7/testfile.c -o /home/birbir/scipy/build/meson-private/tmpigvxa1u7/output.exe -D_FILE_OFFSET_BITS=64 -O0 -lm -Wl,--allow-shlib-undefined` -> 0
Library m found: YES
-----------
Detecting compiler via: `gfortran --version` -> 0
stdout:
GNU Fortran (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-----------
Running command: gfortran -E -dM -
-----
-----------
Detecting linker via: `gfortran -Wl,--version` -> 0
stdout:
GNU ld (GNU Binutils for Ubuntu) 2.38
Copyright (C) 2022 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.
-----------
stderr:
collect2 version 11.4.0
/usr/bin/ld -plugin /usr/lib/gcc/x86_64-linux-gnu/11/liblto_plugin.so -plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper -plugin-opt=-fresolution=/tmp/ccfuC9iJ.res -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed -dynamic-linker /lib64/ld-linux-x86-64.so.2 -pie -z now -z relro /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/Scrt1.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/11/crtbeginS.o -L/usr/lib/gcc/x86_64-linux-gnu/11 -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../../lib -L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/11/../../.. --version -lgcc --push-state --as-needed -lgcc_s --pop-state -lc -lgcc --push-state --as-needed -lgcc_s --pop-state /usr/lib/gcc/x86_64-linux-gnu/11/crtendS.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crtn.o
-----------
Sanity testing Fortran compiler: gfortran
Is cross compiler: False.
Sanity check compiler command line: gfortran sanitycheckf.f90 -o sanitycheckf.exe
Sanity check compile stdout:

-----
Sanity check compile stderr:

-----
Running test binary command:  /home/birbir/scipy/build/meson-private/sanitycheckf.exe
Fortran compiler for the host machine: gfortran (gcc 11.4.0 "GNU Fortran (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0")
Fortran linker for the host machine: gfortran ld.bfd 2.38
Running compile:
Working directory:  /home/birbir/scipy/build/meson-private/tmpvt8wd6cv
Code:
 stop; end program
-----------
Command line: `gfortran /home/birbir/scipy/build/meson-private/tmpvt8wd6cv/testfile.f90 -o /home/birbir/scipy/build/meson-private/tmpvt8wd6cv/output.obj -D_FILE_OFFSET_BITS=64 -c -O0 -Wconversion -Wno-conversion` -> 0
Compiler for Fortran supports arguments -Wno-conversion: YES 
Running compile:
Working directory:  /home/birbir/scipy/build/meson-private/tmpgper20ny
Code:
 
-----------
Command line: `cc /home/birbir/scipy/build/meson-private/tmpgper20ny/testfile.c -o /home/birbir/scipy/build/meson-private/tmpgper20ny/output.exe -D_FILE_OFFSET_BITS=64 -O0 -std=c17 -shared -Wl,--version-script=/home/birbir/scipy/scipy/_build_utils/link-version-pyinit.map` -> 0
Checking if "-Wl,--version-script" : links: YES 
Program tools/generate_f2pymod.py found: YES (/home/birbir/.virtualenvs/scipy-dev/bin/python /home/birbir/scipy/tools/generate_f2pymod.py)
Program scipy/_build_utils/tempita.py found: YES (/home/birbir/.virtualenvs/scipy-dev/bin/python /home/birbir/scipy/scipy/_build_utils/tempita.py)
Running command: /home/birbir/.virtualenvs/scipy-dev/bin/pythran --version
--- stdout ---
0.15.0

--- stderr ---


Program pythran found: YES 0.15.0 0.15.0 (/home/birbir/.virtualenvs/scipy-dev/bin/pythran)
Determining dependency 'xsimd' with pkg-config executable '/usr/bin/pkg-config'
env[PKG_CONFIG_PATH]: 
env[PKG_CONFIG]: /usr/bin/pkg-config
-----------
Called: `/usr/bin/pkg-config --modversion xsimd` -> 1
stderr:
Package xsimd was not found in the pkg-config search path.
Perhaps you should add the directory containing `xsimd.pc'
to the PKG_CONFIG_PATH environment variable
No package 'xsimd' found
-----------
CMake binary for host machine is not cached
CMake binary missing from cross or native file, or env var undefined.
Trying a default CMake fallback at cmake
Found CMake: /usr/bin/cmake (3.22.1)
Extracting basic cmake information
CMake Toolchain: Calling CMake once to generate the compiler state
Calling CMake (['/usr/bin/cmake']) in /home/birbir/scipy/build/meson-private/__CMake_compiler_info__ with:
  - "--trace-expand"
  - "--trace-format=json-v1"
  - "--no-warn-unused-cli"
  - "--trace-redirect=cmake_trace.txt"
  - "-G"
  - "Ninja"
  - "-DCMAKE_TOOLCHAIN_FILE=/home/birbir/scipy/build/meson-private/__CMake_compiler_info__/CMakeMesonTempToolchainFile.cmake"
  - "."
WARNING: CMake Toolchain: Failed to determine CMake compilers state
Try CMake generator: auto
Calling CMake (['/usr/bin/cmake']) in /home/birbir/scipy/build/meson-private/cmake_xsimd with:
  - "--trace-expand"
  - "--trace-format=json-v1"
  - "--no-warn-unused-cli"
  - "--trace-redirect=cmake_trace.txt"
  - "-DCMAKE_TOOLCHAIN_FILE=/home/birbir/scipy/build/meson-private/cmake_xsimd/CMakeMesonToolchainFile.cmake"
  - "."
  -- Module search paths:    ['/', '/opt', '/usr', '/usr/local']
  -- CMake root:             /usr/share/cmake-3.22
  -- CMake architectures:    ['i386-linux-gnu', 'x86_64-linux-gnu']
  -- CMake lib search paths: ['lib', 'lib32', 'lib64', 'libx32', 'share', '', 'lib/i386-linux-gnu', 'lib/x86_64-linux-gnu']
Preliminary CMake check failed. Aborting.
Run-time dependency xsimd found: NO (tried pkgconfig and cmake)
Run-time dependency threads found: YES
Running command: /home/birbir/.virtualenvs/scipy-dev/bin/python -c 'import os
os.chdir(os.path.join("..", "tools"))
import numpy as np
try:
  incdir = os.path.relpath(np.get_include())
except Exception:
  incdir = np.get_include()
print(incdir)
  '
--- stdout ---
../../.virtualenvs/scipy-dev/lib/python3.11/site-packages/numpy/core/include

--- stderr ---


Running command: /home/birbir/.virtualenvs/scipy-dev/bin/python -c 'import os; os.chdir(".."); import numpy; print(numpy.get_include())'
--- stdout ---
/home/birbir/.virtualenvs/scipy-dev/lib/python3.11/site-packages/numpy/core/include

--- stderr ---


Running compile:
Working directory:  /home/birbir/scipy/build/meson-private/tmpjfj5y1cc
Code:
 
        #include<stddef.h>
        #include<stdio.h>
        int main(void) {
            printf("%ld\n", (long)(sizeof(void *)));
            return 0;
        }
-----------
Command line: `cc /home/birbir/scipy/build/meson-private/tmpjfj5y1cc/testfile.c -o /home/birbir/scipy/build/meson-private/tmpjfj5y1cc/output.exe -D_FILE_OFFSET_BITS=64 -O0` -> 0
Program stdout:

8

Program stderr:


Running compile:
Working directory:  /home/birbir/scipy/build/meson-private/tmpwxnt2l1c
Code:
 
-----------
Command line: `cc /home/birbir/scipy/build/meson-private/tmpwxnt2l1c/testfile.c -o /home/birbir/scipy/build/meson-private/tmpwxnt2l1c/output.obj -c -D_FILE_OFFSET_BITS=64 -O0 --print-search-dirs` -> 0
stdout:
install: /usr/lib/gcc/x86_64-linux-gnu/11/
programs: =/usr/lib/gcc/x86_64-linux-gnu/11/:/usr/lib/gcc/x86_64-linux-gnu/11/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/11/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/11/../../../../x86_64-linux-gnu/bin/x86_64-linux-gnu/11/:/usr/lib/gcc/x86_64-linux-gnu/11/../../../../x86_64-linux-gnu/bin/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/11/../../../../x86_64-linux-gnu/bin/
libraries: =/usr/lib/gcc/x86_64-linux-gnu/11/:/usr/lib/gcc/x86_64-linux-gnu/11/../../../../x86_64-linux-gnu/lib/x86_64-linux-gnu/11/:/usr/lib/gcc/x86_64-linux-gnu/11/../../../../x86_64-linux-gnu/lib/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/11/../../../../x86_64-linux-gnu/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/11/:/usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/11/../../../../lib/:/lib/x86_64-linux-gnu/11/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/11/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/11/../../../../x86_64-linux-gnu/lib/:/usr/lib/gcc/x86_64-linux-gnu/11/../../../:/lib/:/usr/lib/
-----------
Library npymath found: YES
Determining dependency 'pybind11' with pkg-config executable '/usr/bin/pkg-config'
env[PKG_CONFIG_PATH]: 
env[PKG_CONFIG]: /usr/bin/pkg-config
-----------
Called: `/usr/bin/pkg-config --modversion pybind11` -> 1
stderr:
Package pybind11 was not found in the pkg-config search path.
Perhaps you should add the directory containing `pybind11.pc'
to the PKG_CONFIG_PATH environment variable
No package 'pybind11' found
-----------
pybind11-config binary missing from cross or native file, or env var undefined.
Trying a default pybind11-config fallback at pybind11-config
pybind11-config found: YES (/home/birbir/.virtualenvs/scipy-dev/bin/pybind11-config) 2.12.0
-----------
Called: `/home/birbir/.virtualenvs/scipy-dev/bin/pybind11-config --includes` -> 0
stdout:
-I/usr/local/include/python3.11 -I/home/birbir/.virtualenvs/scipy-dev/lib/python3.11/site-packages/pybind11/include
-----------
Run-time dependency pybind11 found: YES 2.12.0
Running command: /home/birbir/.virtualenvs/scipy-dev/bin/python -c 'import os
os.chdir(os.path.join("..", "tools"))
import pythran
try:
  incdir = os.path.relpath(pythran.get_include())
except Exception:
  incdir = pythran.get_include()
print(incdir)
'
--- stdout ---
../../.virtualenvs/scipy-dev/lib/python3.11/site-packages/pythran

--- stderr ---


Program f2py found: YES (/home/birbir/.virtualenvs/scipy-dev/bin/f2py)
Running command: /home/birbir/.virtualenvs/scipy-dev/bin/f2py -v
--- stdout ---

--- stderr ---
Traceback (most recent call last):
  File "/home/birbir/.virtualenvs/scipy-dev/bin/f2py", line 5, in <module>
    from numpy.f2py.f2py2e import main
  File "/home/birbir/.virtualenvs/scipy-dev/lib/python3.11/site-packages/numpy/f2py/__init__.py", line 14, in <module>
    import subprocess
  File "/usr/local/lib/python3.11/subprocess.py", line 49, in <module>
    import signal
  File "/home/birbir/scipy/scipy/signal/__init__.py", line 307, in <module>
    from . import _sigtools, windows
ImportError: cannot import name '_sigtools' from partially initialized module 'signal' (most likely due to a circular import) (/home/birbir/scipy/scipy/signal/__init__.py)



scipy/meson.build:156:15: ERROR: Command `/home/birbir/.virtualenvs/scipy-dev/bin/f2py -v` failed with status 1.

My platform us Ubuntu 22.04 on x86_64. GCC version 11.4.0. Python version 3.11.8 in a virtual environment.
Output of pip freeze:

accessible-pygments==0.0.4
alabaster==0.7.15
anyio==4.3.0
argon2-cffi==23.1.0
argon2-cffi-bindings==21.2.0
array_api_strict==1.1.1
arrow==1.3.0
asttokens==2.4.1
asv==0.6.3
asv_runner==0.2.1
attrs==23.2.0
Babel==2.14.0
backports.tarfile==1.1.1
beautifulsoup4==4.12.2
beniget==0.4.1
bleach==6.1.0
breathe==4.35.0
build==1.2.1
certifi==2023.11.17
cffi==1.16.0
charset-normalizer==3.3.2
click==8.1.7
cloudpickle==3.0.0
comm==0.2.1
contourpy==1.2.0
coverage==7.4.0
cryptography==42.0.7
cupy==13.1.0
cycler==0.12.1
Cython==3.0.10
cython-lint==0.16.2
debugpy==1.8.0
decorator==5.1.1
defusedxml==0.7.1
Deprecated==1.2.14
distlib==0.3.8
docutils==0.20.1
doit==0.36.0
execnet==2.1.1
executing==2.0.1
fastjsonschema==2.19.1
fastrlock==0.8.2
filelock==3.13.1
flake8==7.0.0
fonttools==4.47.0
fqdn==1.5.1
fsspec==2023.12.2
gast==0.5.4
gitdb==4.0.11
GitPython==3.1.43
gmpy2==2.1.5
greenlet==3.0.3
hypothesis==6.81.1
idna==3.6
imagesize==1.4.1
importlib-metadata==7.0.1
incremental==22.10.0
iniconfig==2.0.0
ipykernel==6.28.0
ipython==8.23.0
isoduration==20.11.0
jaraco.classes==3.4.0
jaraco.context==5.3.0
jaraco.functools==4.0.1
jedi==0.19.1
jeepney==0.8.0
Jinja2==3.1.2
json5==0.9.14
jsonpointer==2.4
jsonschema==4.20.0
jsonschema-specifications==2023.12.1
jupyter-cache==1.0.0
jupyter-events==0.9.0
jupyter_client==8.6.0
jupyter_core==5.7.1
jupyter_server==2.12.5
jupyter_server_terminals==0.5.2
jupyterlab_pygments==0.3.0
jupyterlab_server==2.25.3
jupyterlite-core==0.3.0
jupyterlite-pyodide-kernel==0.3.1
jupyterlite-sphinx==0.14.0
jupytext==1.16.2
keyring==25.2.1
kiwisolver==1.4.5
markdown-it-py==3.0.0
MarkupSafe==2.1.3
matplotlib==3.8.4
matplotlib-inline==0.1.6
mccabe==0.7.0
mdit-py-plugins==0.4.0
mdurl==0.1.2
meson==1.4.0
meson-python==0.16.0
mistune==3.0.2
more-itertools==10.2.0
mpmath==1.3.0
mypy==1.10.0
mypy-extensions==1.0.0
myst-nb==1.1.0
myst-parser==2.0.0
nbclient==0.9.0
nbconvert==7.16.1
nbformat==5.9.2
nest-asyncio==1.5.8
networkx==3.2.1
nh3==0.2.17
ninja==1.11.1.1
numpy==1.26.4
numpydoc==1.4.0
nvidia-cublas-cu12==12.1.3.1
nvidia-cuda-cupti-cu12==12.1.105
nvidia-cuda-nvrtc-cu12==12.1.105
nvidia-cuda-runtime-cu12==12.1.105
nvidia-cudnn-cu12==8.9.2.26
nvidia-cufft-cu12==11.0.2.54
nvidia-curand-cu12==10.3.2.106
nvidia-cusolver-cu12==11.4.5.107
nvidia-cusparse-cu12==12.1.0.106
nvidia-nccl-cu12==2.18.1
nvidia-nvjitlink-cu12==12.3.101
nvidia-nvtx-cu12==12.1.105
overrides==7.7.0
packaging==23.2
pandas==2.2.0
pandocfilters==1.5.1
parso==0.8.3
Paver==1.3.4
pexpect==4.9.0
pickleshare==0.7.5
pillow==10.2.0
pkginfo==1.9.6
platformdirs==4.1.0
pluggy==1.5.0
ply==3.11
pooch==1.8.1
prometheus_client==0.20.0
prompt-toolkit==3.0.43
psutil==5.9.7
ptyprocess==0.7.0
pure-eval==0.2.2
pyarrow==15.0.0
pybind11==2.12.0
pycodestyle==2.8.0
pycparser==2.21
pydata-sphinx-theme==0.15.2
pydevtool==0.3.0
pyflakes==3.2.0
PyGithub==2.3.0
Pygments==2.17.2
PyJWT==2.8.0
Pympler==1.0.1
PyNaCl==1.5.0
pyparsing==3.1.1
pyproject-metadata==0.7.1
pyproject_hooks==1.1.0
pytest==7.4.0
pytest-cov==4.1.0
pytest-fail-slow==0.5.0
pytest-timeout==2.3.1
pytest-xdist==3.6.1
python-dateutil==2.8.2
python-json-logger==2.0.7
pythran==0.15.0
pytz==2023.3.post1
PyYAML==6.0.1
pyzmq==25.1.2
readme_renderer==43.0
referencing==0.32.1
requests==2.31.0
requests-toolbelt==1.0.0
rfc3339-validator==0.1.4
rfc3986==2.0.0
rfc3986-validator==0.1.1
rich==13.7.0
rich-click==1.8.1
rpds-py==0.16.2
ruff==0.4.4
SecretStorage==3.3.3
Send2Trash==1.8.2
six==1.16.0
smmap==5.0.1
sniffio==1.3.0
snowballstemmer==2.2.0
sortedcontainers==2.4.0
soupsieve==2.5
Sphinx==7.2.6
sphinx_design==0.5.0
sphinxcontrib-applehelp==1.0.7
sphinxcontrib-devhelp==1.0.5
sphinxcontrib-htmlhelp==2.0.4
sphinxcontrib-jsmath==1.0.1
sphinxcontrib-qthelp==1.0.6
sphinxcontrib-serializinghtml==1.1.9
spin==0.8
SQLAlchemy==2.0.25
stack-data==0.6.3
sympy==1.12
tabulate==0.9.0
terminado==0.18.0
threadpoolctl==3.5.0
tinycss2==1.2.1
tokenize-rt==5.2.0
toml==0.10.2
tomli==2.0.1
torch==2.1.2
tornado==6.4
towncrier==23.11.0
traitlets==5.14.1
triton==2.1.0
twine==5.0.0
types-psutil==5.9.5.20240511
types-python-dateutil==2.8.19.20240106
typing_extensions==4.11.0
tzdata==2023.4
ufunclab @ file:///home/birbir/ufunclab
uri-template==1.3.0
urllib3==2.1.0
virtualenv==20.26.1
wcwidth==0.2.13
webcolors==1.13
webencodings==0.5.1
websocket-client==1.7.0
wrapt==1.16.0
zipp==3.17.0

SciPy/NumPy/Python version and system information

I cannot build SciPy, but my NumPy version is 1.26, and sys.version_info is sys.version_info(major=3, minor=11, micro=8, releaselevel='final', serial=0)

[lucascolley]

confirm that I can not reproduce on my machine (M1 Mac)

[steppi]

confirm that I can not reproduce on my machine (M1 Mac)

Ah, I forgot. I did have PYTHONPATH set to test out something locally, and forgot to unset it. Clearing that up fixed things. Do you also have PYTHONPATH set @czgdp1807?

[steppi]

I'm going to go ahead and close this. Sorry for the noise.

[czgdp1807]

Yes, after unsetting PYTHONPATH things worked out. :D