ref: b2aec36134f39421dc3a434d973409d98bffb3aa
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
])