Build system: fix several warnings with Autoconf 2.70

license.txt

@@ -311,7 +311,7 @@ License: LGPL-2.1+
 
 Files: m4/ax_matlab_arch.m4 m4/ax_matlab.m4 m4/ax_mexext.m4
 Copyright: 2002-2003 Ralph Schleicher
-           2009-2019 Dynare Team
+           2009-2021 Dynare Team
 License: GPL-2+ with Autoconf exception
 
 Files: scripts/dynare.el

m4/ax_gsl.m4

@@ -2,7 +2,7 @@ dnl Detect GSL.
 dnl We don't use the official M4 macro since it relies on the script gsl-config,
 dnl which does not work when cross-compiling.
 dnl
-dnl Copyright © 2010-2012 Dynare Team
+dnl Copyright © 2010-2021 Dynare Team
 dnl
 dnl This file is part of Dynare.
 dnl
@@ -21,7 +21,7 @@ dnl along with Dynare.  If not, see <https://www.gnu.org/licenses/>.
 
 AC_DEFUN([AX_GSL],
 [
-AC_ARG_WITH(gsl, AC_HELP_STRING([--with-gsl=DIR], [prefix to GSL installation]),
+AC_ARG_WITH(gsl, AS_HELP_STRING([--with-gsl=DIR], [prefix to GSL installation]),
             gsl_prefix="$withval", gsl_prefix="")
 
   has_gsl=yes

m4/ax_matio.m4

 dnl Detect the MATIO Library.
 dnl
-dnl Copyright © 2012-2014 Dynare Team
+dnl Copyright © 2012-2021 Dynare Team
 dnl
 dnl This file is part of Dynare.
 dnl
@@ -19,7 +19,7 @@ dnl along with Dynare.  If not, see <https://www.gnu.org/licenses/>.
 
 AC_DEFUN([AX_MATIO],
 [
-AC_ARG_WITH(matio, AC_HELP_STRING([--with-matio=DIR], [prefix to MATIO installation]),
+AC_ARG_WITH(matio, AS_HELP_STRING([--with-matio=DIR], [prefix to MATIO installation]),
             matio_prefix="$withval", matio_prefix="")
 
   has_matio=yes

m4/ax_matlab.m4

 dnl ax_matlab.m4 --- check for MATLAB.
 dnl
 dnl Copyright © 2000-2003 Ralph Schleicher
-dnl Copyright © 2009 Dynare Team
+dnl Copyright © 2009-2021 Dynare Team
 dnl
 dnl This program is free software; you can redistribute it and/or
 dnl modify it under the terms of the GNU General Public License as
@@ -31,7 +31,7 @@ AC_DEFUN([AX_MATLAB],
 [dnl
 AC_PREREQ([2.50])
 ax_enable_matlab=
-AC_ARG_WITH([matlab], AC_HELP_STRING([--with-matlab=ARG], [check for MATLAB [[yes]]]),
+AC_ARG_WITH([matlab], AS_HELP_STRING([--with-matlab=ARG], [check for MATLAB [[yes]]]),
 [case $withval in
   yes | no)
     # Explicitly enable or disable MATLAB but determine

m4/ax_octave.m4

 dnl ax_octave.m4 --- check for Octave
 dnl
-dnl Copyright © 2020 Dynare Team
+dnl Copyright © 2020-2021 Dynare Team
 dnl
 dnl This program is free software; you can redistribute it and/or
 dnl modify it under the terms of the GNU General Public License as
@@ -30,7 +30,7 @@ dnl of that program.
 # Sets ax_enable_octave=yes if successful, ax_enable_octave=no otherwise
 AC_DEFUN([AX_OCTAVE],
 [dnl
-AC_ARG_WITH([octave], AC_HELP_STRING([--with-octave=PATH], [Path to search for Octave installation]),
+AC_ARG_WITH([octave], AS_HELP_STRING([--with-octave=PATH], [Path to search for Octave installation]),
 [
   if test -n "$withval"; then
     if test -x "$withval/bin/octave" && test -x "$withval/bin/mkoctfile"; then

m4/ax_slicot.m4

@@ -28,7 +28,7 @@ AC_DEFUN([AX_SLICOT],
     AC_MSG_ERROR([Argument to autoconf slicot macro must be either 'matlab' or 'octave'])
   fi
 
-  AC_ARG_WITH(slicot, AC_HELP_STRING([--with-slicot=DIR], [prefix to SLICOT installation]),
+  AC_ARG_WITH(slicot, AS_HELP_STRING([--with-slicot=DIR], [prefix to SLICOT installation]),
               slicot_prefix="$withval", slicot_prefix="")
   has_slicot=yes
 

mex/build/matlab/configure.ac

@@ -47,7 +47,6 @@ esac
 
 AC_PROG_FC
 AC_PROG_CC
-AC_PROG_CC_C99
 AC_PROG_CXX
 AX_CXX_COMPILE_STDCXX_17
 AC_PROG_RANLIB

mex/build/octave/configure.ac

@@ -43,7 +43,6 @@ AX_COMPARE_VERSION([$OCTAVE_VERSION], [lt], [6.2.0], [AC_MSG_ERROR([Your Octave
 
 AC_PROG_FC
 AC_PROG_CC
-AC_PROG_CC_C99
 AC_PROG_CXX
 AX_CXX_COMPILE_STDCXX_17
 AC_PROG_RANLIB