BLD: add option to specify numpy header location

In some cases the numpy module might not be usable during build-time,
especially when cross-compiling. (E.g. when compiling for arm32 on a
x86-64 machine, the arm32 module is not usable at build time).

This makes meson fail, as it isn't able to figure out the location of
numpy headers.

To allow an alternative way to find these headers, introduce a meson
build option, where the location of the numpy headers can be specified.

In case numpy module cannot be loaded for some reason to query the
include folder location, fall back to the value of this meson option.

Signed-off-by: Gyorgy Sarvari <[email protected]>

Author: OldManYellsAtCloud

doc/source/whatsnew/v3.0.0.rst

@@ -81,6 +81,7 @@ Other enhancements
 - Support passing a :class:`Iterable[Hashable]` input to :meth:`DataFrame.drop_duplicates` (:issue:`59237`)
 - Support reading Stata 102-format (Stata 1) dta files (:issue:`58978`)
 - Support reading Stata 110-format (Stata 7) dta files (:issue:`47176`)
+- Support specifying numpy header location when building with Meson (:issue:`55305`)
 
 .. ---------------------------------------------------------------------------
 .. _whatsnew_300.notable_bug_fixes:

meson.options

@@ -0,0 +1 @@
+option('numpy_inc_dir', type : 'string', description : 'The absolute path to the numpy headers')

pandas/meson.build

@@ -4,17 +4,24 @@ incdir_numpy = run_command(
         '-c',
         '''
 import os
-import numpy as np
+
+try:
+    import numpy as np
+    base_incdir = np.get_include()
+except Exception:
+    base_incdir = os.getenv('NUMPY_INC_DIR')
+
 try:
     # Check if include directory is inside the pandas dir
     # e.g. a venv created inside the pandas dir
     # If so, convert it to a relative path
-    incdir = os.path.relpath(np.get_include())
+    incdir = os.path.relpath(base_incdir)
 except Exception:
-    incdir = np.get_include()
+    incdir = base_incdir
 print(incdir)
      ''',
     ],
+    env: {'NUMPY_INC_DIR': get_option('numpy_inc_dir')},
     check: true,
 ).stdout().strip()