Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC

Commits:

• d48ebc23
  by Cheng Shao at 2025-09-16T14:59:18-04:00

  autoconf: emit warning instead of error for FIND_PYTHON logic
  
  This patch makes FIND_PYTHON logic emit warning instead of error, so
  when the user doesn't expect to run the testsuite driver (especially
  when installing a bindist), python would not be mandatory. Fixes #26347.
  

1 changed file:

• m4/find_python.m4

Changes:

     dnl If still not found, hard error: we require Python >= 3.7

     AS_IF([test -z "$PYTHON"], [

-        AC_MSG_ERROR([Python 3.7 or later is required but no python interpreter was found. Please install Python >= 3.7 and re-run configure.])

+        AC_MSG_WARN([Python 3.7 or later is required but no python interpreter was found. This is needed by the testsuite driver.])

     ])

     dnl Query the version string (X.Y.Z) of the selected interpreter

     dnl Enforce minimum version 3.7.0

     AS_IF([test -z "$PythonVersion"], [

-        AC_MSG_ERROR([Failed to determine Python version for $PYTHON])

+        AC_MSG_WARN([Failed to determine Python version for $PYTHON])

     ])

     FP_COMPARE_VERSIONS([$PythonVersion], [-lt], [3.7.0], [

-        AC_MSG_ERROR([Python 3.7 or later is required, but $PYTHON reports $PythonVersion])

+        AC_MSG_WARN([Python 3.7 or later is required, but $PYTHON reports $PythonVersion])

     ])

     dnl Canonicalise path for Windows