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Only use -Wno-format-truncation et al when the compiler supports them

    1: #
    2: #   $Id: configure.ac,v 1.25 2025/04/09 21:10:14 snw Exp $
    3: #    autoconf rules for FreeM
    4: #
    5: #  
    6: #   Author: Serena Willis <jpw@coherent-logic.com>
    7: #    Copyright (C) 1998 MUG Deutschland
    8: #    Copyright (C) 2020, 2025 Coherent Logic Development LLC
    9: #
   10: #
   11: #   This file is part of FreeM.
   12: #
   13: #   FreeM is free software: you can redistribute it and/or modify
   14: #   it under the terms of the GNU Affero Public License as published by
   15: #   the Free Software Foundation, either version 3 of the License, or
   16: #   (at your option) any later version.
   17: #
   18: #   FreeM is distributed in the hope that it will be useful,
   19: #   but WITHOUT ANY WARRANTY; without even the implied warranty of
   20: #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   21: #   GNU Affero Public License for more details.
   22: #
   23: #   You should have received a copy of the GNU Affero Public License
   24: #   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
   25: #
   26: #   $Log: configure.ac,v $
   27: #   Revision 1.25  2025/04/09 21:10:14  snw
   28: #   Only use -Wno-format-truncation et al when the compiler supports them
   29: #
   30: #   Revision 1.24  2025/04/09 20:06:02  snw
   31: #   Add macros to check for compiler flags to suppress unavoidable warnings
   32: #
   33: #   Revision 1.23  2025/04/07 23:40:30  snw
   34: #   Move to 0.64.0-rc0 and prepare to optimize global file lookup
   35: #
   36: #   Revision 1.22  2025/04/07 21:19:38  snw
   37: #   Release FreeM 0.64.0-rc0
   38: #
   39: #   Revision 1.21  2025/04/04 18:00:00  snw
   40: #   *** empty log message ***
   41: #
   42: #   Revision 1.20  2025/04/04 12:46:13  snw
   43: #   Patch Solaris 8 crash and bump version to 0.64.0-rc0
   44: #
   45: #   Revision 1.19  2025/04/04 02:40:32  snw
   46: #   Release 0.64.0-rc0
   47: #
   48: #   Revision 1.18  2025/04/04 02:12:24  snw
   49: #   Bump to 0.64.0-rc0 and make sure m_log function is never empty
   50: #
   51: #   Revision 1.17  2025/04/04 01:18:20  snw
   52: #   Remove vestigial logging code and bump to 0.64.0-rc0
   53: #
   54: #   Revision 1.16  2025/04/03 20:48:14  snw
   55: #   Improve daemon error diagnostics and bump to 0.64.0-rc0
   56: #
   57: #   Revision 1.15  2025/04/03 15:51:17  snw
   58: #   Add fmadm man page and apply minor updates to freem man page
   59: #
   60: #   Revision 1.14  2025/04/03 01:41:01  snw
   61: #   New features frozen; prepare 0.64.0-rc0
   62: #
   63: #   Revision 1.13  2025/03/30 01:36:58  snw
   64: #   Make it easier to bring back fma_gedit, fix double-free in global handler, limit $CHAR to 7-bit ASCII
   65: #
   66: #   Revision 1.12  2025/03/29 16:50:42  snw
   67: #   Back to 0.64.0-rc0 as version for development; temp fix for double-free issue in global_dispatch
   68: #
   69: #   Revision 1.11  2025/03/27 03:31:16  snw
   70: #   Prepare for release of FreeM 0.64.0-rc0
   71: #
   72: #   Revision 1.10  2025/03/23 19:42:18  snw
   73: #   Back to 0.64.0-rc0 versioning for continued development work
   74: #
   75: #   Revision 1.9  2025/03/23 04:42:33  snw
   76: #   Prepare for release of FreeM 0.64.0-rc0
   77: #
   78: #   Revision 1.8  2025/03/16 16:08:26  snw
   79: #   Back on 0.64.0-rc0 versioning for continued development
   80: #
   81: #   Revision 1.7  2025/03/15 03:19:33  snw
   82: #   Fix broken build and update to 0.64.0-rc0
   83: #
   84: #   Revision 1.6  2025/03/15 02:26:35  snw
   85: #   Prepare for 0.64.0-rc0 release
   86: #
   87: #   Revision 1.5  2025/03/09 19:14:24  snw
   88: #   First phase of REUSE compliance and header reformat
   89: #
   90: #
   91: # SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
   92: # SPDX-License-Identifier: AGPL-3.0-or-later
   93: 
   94: 
   95: AC_INIT([freem],[0.64.0-rc0],[snw@coherent-logic.com])
   96: AC_CONFIG_HEADERS([src/config.h])
   97: AC_CONFIG_MACRO_DIR([m4])
   98: 
   99: AX_LIB_READLINE
  100: AX_CHECK_COMPILE_FLAG([-Wno-format-truncation], [AX_APPEND_FLAG([-Wno-format-truncation])])
  101: AX_CHECK_COMPILE_FLAG([-Wno-format-contains-nul], [AX_APPEND_FLAG([-Wno-format-contains-nul])])
  102: 
  103: # check for libm
  104: AC_CHECK_LIB([m], [powf])
  105: AC_CHECK_LIB([m], [pow])
  106: 
  107: AC_CANONICAL_HOST
  108: #AX_WITH_CURSES
  109: 
  110: # find out if we need to link with -lsocket and/or -lnsl to get
  111: # BSD sockets support
  112: 
  113: AU_ALIAS([LIB_SOCKET_NSL], [AX_LIB_SOCKET_NSL])
  114: 
  115: AC_DEFUN([AX_LIB_SOCKET_NSL],
  116: [
  117:         AC_SEARCH_LIBS([gethostbyname], [nsl])
  118:         AC_SEARCH_LIBS([socket], [socket], [], [
  119:                 AC_CHECK_LIB([socket], [socket], [LIBS="-lsocket -lnsl $LIBS"],
  120:                 [], [-lnsl])])
  121: ])
  122: 
  123: AX_LIB_SOCKET_NSL
  124: 
  125: #
  126: # check for getopt.h and getopt_long
  127: #
  128: AC_CHECK_HEADERS(getopt.h)
  129: AC_CHECK_FUNCS([getopt_long])
  130: 
  131: #
  132: # bring in X11, X Toolkit, and Motif if --enable-mwapi is passed to configure
  133: #
  134: AC_ARG_ENABLE([mwapi],  AS_HELP_STRING([--enable-mwapi], [Enable MWAPI (OSF/Motif) support (EXPERIMENTAL)]))
  135: 
  136: AS_IF([test "x$enable_mwapi" = "xyes"], [
  137:   AX_LIB_MOTIF
  138: ]) 
  139: 
  140: # check for wiringPi headers and library linkage for
  141: # ^$ZRPI ssv on Raspberry Pi SBCs
  142: AC_CHECK_HEADERS(wiringPi.h)
  143: 
  144: AC_DEFUN([AX_LIB_WIRINGPI],
  145: [
  146:         AC_SEARCH_LIBS([wiringPiSetup], [wiringPi], [], [
  147:                 AC_CHECK_LIB([wiringPi], [wiringPiSetup], [LIBS="-lwiringPi $LIBS"],
  148:                 [], [-lwiringPi])])
  149: ])
  150: 
  151: AX_LIB_WIRINGPI
  152: 
  153: AC_ENABLE_SHARED
  154: AC_DISABLE_STATIC
  155: LT_INIT
  156: AM_INIT_AUTOMAKE
  157: AC_CONFIG_FILES(Makefile src/Makefile doc/Makefile)
  158: AC_PROG_CC
  159: # AC_PATH_XTRA
  160: AC_OUTPUT