ref: 44e7816658ea0f995343ee7bb288001b3647925b
dir: /common/id3lib/m4/lf_warnings.m4/
dnl Copyright (C) 1988 Eleftherios Gkioulekas <[email protected]> dnl dnl This program is free software; you can redistribute it and/or modify dnl it under the terms of the GNU General Public License as published by dnl the Free Software Foundation; either version 2 of the License, or dnl (at your option) any later version. dnl dnl This program is distributed in the hope that it will be useful, dnl but WITHOUT ANY WARRANTY; without even the implied warranty of dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the dnl GNU General Public License for more details. dnl dnl You should have received a copy of the GNU General Public License dnl along with this program; if not, write to the Free Software dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. dnl dnl As a special exception to the GNU General Public License, if you dnl distribute this file as part of a program that contains a configuration dnl script generated by Autoconf, you may include it under the same dnl distribution terms that you use for the rest of that program. # -------------------------------------------------------------------------- # Check whether the C++ compiler accepts a certain flag # If it does it adds the flag to CXXFLAGS # If it does not then it returns an error to lf_ok # Usage: # LF_CHECK_CXX_FLAG(-flag1 -flag2 -flag3 ...) # ------------------------------------------------------------------------- AC_DEFUN(LF_CHECK_CXX_FLAG,[ echo 'void f(){}' > conftest.cc for i in $1 do AC_MSG_CHECKING([whether $CXX accepts $i]) if test -z "`${CXX} $i -c conftest.cc 2>&1`" then CXXFLAGS="${CXXFLAGS} $i" AC_MSG_RESULT(yes) else AC_MSG_RESULT(no) fi done rm -f conftest.cc conftest.o ]) # -------------------------------------------------------------------------- # Check whether the C compiler accepts a certain flag # If it does it adds the flag to CFLAGS # If it does not then it returns an error to lf_ok # Usage: # LF_CHECK_CC_FLAG(-flag1 -flag2 -flag3 ...) # ------------------------------------------------------------------------- AC_DEFUN(LF_CHECK_CC_FLAG,[ echo 'void f(){}' > conftest.c for i in $1 do AC_MSG_CHECKING([whether $CC accepts $i]) if test -z "`${CC} $i -c conftest.c 2>&1`" then CFLAGS="${CFLAGS} $i" AC_MSG_RESULT(yes) else AC_MSG_RESULT(no) fi done rm -f conftest.c conftest.o ]) # -------------------------------------------------------------------------- # Check whether the Fortran compiler accepts a certain flag # If it does it adds the flag to FFLAGS # If it does not then it returns an error to lf_ok # Usage: # LF_CHECK_F77_FLAG(-flag1 -flag2 -flag3 ...) # ------------------------------------------------------------------------- AC_DEFUN(LF_CHECK_F77_FLAG,[ cat << EOF > conftest.f c....:++++++++++++++++++++++++ PROGRAM MAIN PRINT*,'Hello World!' END EOF for i in $1 do AC_MSG_CHECKING([whether $F77 accepts $i]) if test -z "`${F77} $i -c conftest.f 2>&1`" then FFLAGS="${FFLAGS} $i" AC_MSG_RESULT(yes) else AC_MSG_RESULT(no) fi done rm -f conftest.f conftest.o ]) # ---------------------------------------------------------------------- # Provide the configure script with an --with-warnings option that # turns on warnings. Call this command AFTER you have configured ALL your # compilers. # ---------------------------------------------------------------------- AC_DEFUN(LF_SET_WARNINGS,[ dnl Check for --with-warnings AC_MSG_CHECKING([whether user wants warnings]) AC_ARG_WITH(warnings, [ --with-warnings Turn on warnings], [ lf_warnings=yes ], [ lf_warnings=no ]) AC_MSG_RESULT($lf_warnings) dnl Warnings for the two main compilers cc_warning_flags="-Wall" cxx_warning_flags="-Wall -Woverloaded-virtual -Wtemplate-debugging" if test $lf_warnings = yes then if test -n "${CC}" then LF_CHECK_CC_FLAG($cc_warning_flags) fi if test -n "${CXX}" then LF_CHECK_CXX_FLAG($cxx_warning_flags) fi fi ])