From ca6194150f8fe44b5c320e0c1e16e240546536f4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Est=C3=A8ve?= <loic.esteve@ymail.com>
Date: Mon, 13 Mar 2023 10:02:53 +0100
Subject: [PATCH] MNT Fix Pyodide build errors due to incompatible function
 pointer types

---
 sklearn/svm/_liblinear.pxi                        | 8 ++++----
 sklearn/svm/_libsvm.pxi                           | 2 +-
 sklearn/svm/_libsvm_sparse.pyx                    | 2 +-
 sklearn/svm/src/liblinear/_cython_blas_helpers.h  | 8 ++++----
 sklearn/svm/src/libsvm/_svm_cython_blas_helpers.h | 2 +-
 5 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/sklearn/svm/_liblinear.pxi b/sklearn/svm/_liblinear.pxi
index 569fe5b8a88b5..1a874ba4cbf9c 100644
--- a/sklearn/svm/_liblinear.pxi
+++ b/sklearn/svm/_liblinear.pxi
@@ -1,8 +1,8 @@
 cdef extern from "_cython_blas_helpers.h":
-    ctypedef double (*dot_func)(int, double*, int, double*, int)
-    ctypedef void (*axpy_func)(int, double, double*, int, double*, int)
-    ctypedef void (*scal_func)(int, double, double*, int)
-    ctypedef double (*nrm2_func)(int, double*, int)
+    ctypedef double (*dot_func)(int, const double*, int, const double*, int)
+    ctypedef void (*axpy_func)(int, double, const double*, int, double*, int)
+    ctypedef void (*scal_func)(int, double, const double*, int)
+    ctypedef double (*nrm2_func)(int, const double*, int)
     cdef struct BlasFunctions:
         dot_func dot
         axpy_func axpy
diff --git a/sklearn/svm/_libsvm.pxi b/sklearn/svm/_libsvm.pxi
index f97a21ad50da5..8f1250d884687 100644
--- a/sklearn/svm/_libsvm.pxi
+++ b/sklearn/svm/_libsvm.pxi
@@ -1,7 +1,7 @@
 ################################################################################
 # Includes
 cdef extern from "_svm_cython_blas_helpers.h":
-    ctypedef double (*dot_func)(int, double*, int, double*, int)
+    ctypedef double (*dot_func)(int, const double*, int, const double*, int)
     cdef struct BlasFunctions:
         dot_func dot
 
diff --git a/sklearn/svm/_libsvm_sparse.pyx b/sklearn/svm/_libsvm_sparse.pyx
index ffef617a70e6e..37619f399988c 100644
--- a/sklearn/svm/_libsvm_sparse.pyx
+++ b/sklearn/svm/_libsvm_sparse.pyx
@@ -11,7 +11,7 @@ cdef extern from *:
 # Includes
 
 cdef extern from "_svm_cython_blas_helpers.h":
-    ctypedef double (*dot_func)(int, double*, int, double*, int)
+    ctypedef double (*dot_func)(int, const double*, int, const double*, int)
     cdef struct BlasFunctions:
         dot_func dot
 
diff --git a/sklearn/svm/src/liblinear/_cython_blas_helpers.h b/sklearn/svm/src/liblinear/_cython_blas_helpers.h
index 6b2475e9d56cf..bdec1a2f99eb9 100644
--- a/sklearn/svm/src/liblinear/_cython_blas_helpers.h
+++ b/sklearn/svm/src/liblinear/_cython_blas_helpers.h
@@ -1,10 +1,10 @@
 #ifndef _CYTHON_BLAS_HELPERS_H
 #define _CYTHON_BLAS_HELPERS_H
 
-typedef double (*dot_func)(int, double*, int, double*, int);
-typedef void (*axpy_func)(int, double, double*, int, double*, int);
-typedef void (*scal_func)(int, double, double*, int);
-typedef double (*nrm2_func)(int, double*, int);
+typedef double (*dot_func)(int, const double*, int, const double*, int);
+typedef void (*axpy_func)(int, double, const double*, int, double*, int);
+typedef void (*scal_func)(int, double, const double*, int);
+typedef double (*nrm2_func)(int, const double*, int);
 
 typedef struct BlasFunctions{
     dot_func dot;
diff --git a/sklearn/svm/src/libsvm/_svm_cython_blas_helpers.h b/sklearn/svm/src/libsvm/_svm_cython_blas_helpers.h
index 057e08195e9a5..2548c7844d267 100644
--- a/sklearn/svm/src/libsvm/_svm_cython_blas_helpers.h
+++ b/sklearn/svm/src/libsvm/_svm_cython_blas_helpers.h
@@ -1,7 +1,7 @@
 #ifndef _SVM_CYTHON_BLAS_HELPERS_H
 #define _SVM_CYTHON_BLAS_HELPERS_H
 
-typedef double (*dot_func)(int, double*, int, double*, int);
+typedef double (*dot_func)(int, const double*, int, const double*, int);
 typedef struct BlasFunctions{
     dot_func dot;
 } BlasFunctions;