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								/**
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								 * Marlin 3D Printer Firmware
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								 * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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								 *
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								 * Based on Sprinter and grbl.
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								 * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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								 *
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								 * This program is free software: you can redistribute it and/or modify
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								 * it under the terms of the GNU General Public License as published by
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								 * the Free Software Foundation, either version 3 of the License, or
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								 * (at your option) any later version.
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								 *
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								 * This program is distributed in the hope that it will be useful,
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								 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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								 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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								 * GNU General Public License for more details.
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								 *
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								 * You should have received a copy of the GNU General Public License
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								 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
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								 *
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								 */
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								#include "MarlinConfig.h"
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								#if ENABLED(AUTO_BED_LEVELING_LINEAR)
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								void daxpy(int n, float da, float dx[], int incx, float dy[], int incy);
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								float ddot(int n, float dx[], int incx, float dy[], int incy);
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								float dnrm2(int n, float x[], int incx);
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								void dqrank(float a[], int lda, int m, int n, float tol, int* kr,
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								            int jpvt[], float qraux[]);
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								void dqrdc(float a[], int lda, int n, int p, float qraux[], int jpvt[],
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								           float work[], int job);
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								int dqrls(float a[], int lda, int m, int n, float tol, int* kr, float b[],
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								          float x[], float rsd[], int jpvt[], float qraux[], int itask);
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								void dqrlss(float a[], int lda, int m, int n, int kr, float b[], float x[],
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								            float rsd[], int jpvt[], float qraux[]);
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								int dqrsl(float a[], int lda, int n, int k, float qraux[], float y[],
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								          float qy[], float qty[], float b[], float rsd[], float ab[], int job);
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								void dscal(int n, float sa, float x[], int incx);
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								void dswap(int n, float x[], int incx, float y[], int incy);
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								void qr_solve(float x[], int m, int n, float a[], float b[]);
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								#endif
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