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#
# DMS Tools and Utilities
# Copyright (C) 2010 David M. Syzdek <david@syzdek.net>
#
# @SYZDEK_LICENSE_HEADER_START@
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of David M. Syzdek nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID M. SYZDEK BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# @SYZDEK_LICENSE_HEADER_END@
#
# acinclude.m4 - custom m4 macros used by configure.ac
#
# AC_DMS_ENABLE_WARNINGS()
# ______________________________________________________________________________
AC_DEFUN([AC_DMS_ENABLE_WARNINGS],[dnl
# prerequists
AC_REQUIRE([AC_PROG_CC])
# sets compiler
if test "x${CC}" == "x";then
ac_dms_cc=cc;
else
ac_dms_cc=${CC};
fi
# display options
enableval=""
AC_ARG_ENABLE(
warnings,
[AC_HELP_STRING([--disable-warnings], [disable compiler warnings])],
[ EWARNINGS=$enableval ],
[ EWARNINGS=$enableval ]
)
enableval=""
AC_ARG_ENABLE(
strictwarnings,
[AC_HELP_STRING([--enable-strictwarnings], [enable strict compiler warnings])],
[ ESTRICTWARNINGS=$enableval ],
[ ESTRICTWARNINGS=$enableval ]
)
# sets options
if test "x${ESTRICTWARNINGS}" != "xyes";then
USE_STRICTWARNINGS=no
else
USE_STRICTWARNINGS=yes
fi
if test "x${EWARNINGS}" != "xno";then
USE_WARNINGS=yes
else
USE_WARNINGS=no
USE_STRICTWARNINGS=no
fi
# list of args
ac_dms_warnings_list=""
if test "x${USE_WARNINGS}" == "xyes";then
ac_dms_warnings_list=" ${ac_dms_warnings_list} -W"
ac_dms_warnings_list=" ${ac_dms_warnings_list} -Wall"
ac_dms_warnings_list=" ${ac_dms_warnings_list} -Werror"
fi
if test "x${USE_STRICTWARNINGS}" == "xyes";then
ac_dms_warnings_list="${ac_dms_warnings_list} -std=gnu99"
ac_dms_warnings_list="${ac_dms_warnings_list} -pedantic"
#ac_dms_warnings_list="${ac_dms_warnings_list} -Wtraditional"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wpragma-once"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wextra-tokens"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wnewline-eof"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wsequence-point"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wdiv-by-zero"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wfloat-equal"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wdisabled-optimization"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wchar-subscripts"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wcomment"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wformat"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wimplicit"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wmain"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wmissing-braces"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wparentheses"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wreturn-type"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wswitch"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wswitch-default" # for some reason any call to memset() fails with this flag
ac_dms_warnings_list="${ac_dms_warnings_list} -Wtrigraphs"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wunused"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wunknown-pragmas"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wuninitialized"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wmultichar"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wundef"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wendif-labels"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wshadow"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wlarger-than-4096"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wpointer-arith"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wbad-function-cast"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wcast-qual"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wcast-align"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wwrite-strings"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wconversion"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wsign-compare"
ac_dms_warnings_list="${ac_dms_warnings_list} -Waggregate-return"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wstrict-prototypes"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wstrict-aliasing"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wmissing-prototypes"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wmissing-declarations"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wmissing-noreturn"
#ac_dms_warnings_list="${ac_dms_warnings_list} -Wmissing-format-attribute" # vprintf is failing this warning
ac_dms_warnings_list="${ac_dms_warnings_list} -Wredundant-decls"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wunreachable-code"
ac_dms_warnings_list="${ac_dms_warnings_list} -Winvalid-pch"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wpacked"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wpadded"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wnested-externs"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wenum-clash"
ac_dms_warnings_list="${ac_dms_warnings_list} -Winline"
ac_dms_warnings_list="${ac_dms_warnings_list} -Wlong-long"
fi
# creates test source code
AC_LANG_CONFTEST(
[AC_LANG_PROGRAM(
[[int main(void);]],
[[return(0);]]
)])
# loops throough options
CFLAGS_WARNINGS=""
for ac_dms_warning in ${ac_dms_warnings_list};do
AC_MSG_CHECKING(for gcc flag ${ac_dms_warning})
${ac_dms_cc} ${CFLAGS_WARNINGS} ${ac_dms_warning} conftest.c -o conftest.o > /dev/null 2>&1
if test "x$?" == "x0";then
CFLAGS_WARNINGS="${CFLAGS_WARNINGS} ${ac_dms_warning}"
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
done
# export variables
AC_SUBST(CFLAGS_WARNINGS, "$CFLAGS_WARNINGS")
])dnl
# end of M4 file
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