#
#   Bindle Binaries Tools
#   Copyright (C) 2011 Bindle Binaries <syzdek@bindlebinaries.com>.
#
#   @BINDLE_BINARIES_BSD_LICENSE_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 Bindle Binaries 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 BINDLE BINARIES 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.
#
#   @BINDLE_BINARIES_BSD_LICENSE_END@
#
#   m4/bindle.m4 - m4 macros used by configure.ac
#


# AC_BINDLE_ENABLE_WARNINGS([extra warnings], [exclude warnings], [value of -std])
# ______________________________________________________________________________
AC_DEFUN([AC_BINDLE_ENABLE_WARNINGS],[dnl

   # prerequists
   AC_REQUIRE([AC_PROG_CC])

   # saves arguments
   ac_bindle_warnings_additions=" $1 "
   ac_bindle_warnings_exclude=" $2 "
   ac_bindle_warnings_std="$3"

   # sets compiler
   if test "x${CC}" == "x";then
      ac_bindle_cc=cc;
   else
      ac_bindle_cc=${CC};
   fi

   # sets default for -std
   if test "x${ac_bindle_warnings_std}" == "x";then
      ac_bindle_warnings_std=gnu11
   fi

   # display options
   enableval=""
   AC_ARG_ENABLE(
      debug,
      [AS_HELP_STRING([--enable-debug], [enable debug messages in binaries])],
      [ EDEBUG=$enableval ],
      [ EDEBUG=$enableval ]
   )
   enableval=""
   AC_ARG_ENABLE(
      warnings,
      [AS_HELP_STRING([--disable-warnings], [disable compiler warnings])],
      [ EWARNINGS=$enableval ],
      [ EWARNINGS=$enableval ]
   )
   enableval=""
   AC_ARG_ENABLE(
      strictwarnings,
      [AS_HELP_STRING([--enable-strictwarnings], [enable additional 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
   if test "x${EDEBUG}" != "xyes";then
      USE_DEBUG=no
   else
      USE_DEBUG=yes
      AC_DEFINE_UNQUOTED(USE_DEBUG, 1, [Use debug messages])
   fi

   # list of args
   ac_bindle_warnings_list=""
   if test "x${USE_STRICTWARNINGS}" == "xyes";then
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -std=${ac_bindle_warnings_std}"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -pedantic"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -W"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wall"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wextra"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Werror"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Weverything"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wunknown-warning"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wno-unused-macros"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wno-reserved-id-macro"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wno-format-nonliteral"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wno-disabled-macro-expansion"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wabi"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wdiv-by-zero"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wfloat-equal"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wdisabled-optimization"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wswitch-default"   # for some reason any call to memset() fails with this flag
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wunused"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wmultichar"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wendif-labels"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wshadow"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wlarger-than-4096"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wpointer-arith"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wbad-function-cast"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wcast-qual"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wcast-align"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wwrite-strings"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Waggregate-return"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wshorten-64-to-32"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wstrict-prototypes"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wmissing-prototypes"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wmissing-declarations"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wmissing-noreturn"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wmissing-format-attribute"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wredundant-decls"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wunreachable-code"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Winvalid-pch"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wpacked"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wpadded"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wnested-externs"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Winline"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} ${ac_bindle_warnings_additions}"
   elif test "x${USE_WARNINGS}" == "xyes";then
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -std=${ac_bindle_warnings_std}"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -W"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wall"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Werror"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} ${ac_bindle_warnings_additions}"
   elif test "x${USE_WARNINGS}" != "xno";then
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -W"
      ac_bindle_warnings_list="${ac_bindle_warnings_list} -Wall"
   fi

   # creates test source code
   if test -f "${srcdir}/${ac_aux_dir}/bindletest-gccwarnings.c";then
      cp \
         "${srcdir}/${ac_aux_dir}/bindletest-gccwarnings.c" \
         conftest.c
   elif test -f "${srcdir}/${bindletools_srcdir}/build-aux/bindletest-gccwarnings.c";then
      cp \
         "${srcdir}/${bindletools_srcdir}/build-aux/bindletest-gccwarnings.c" \
         conftest.c
   else
      AC_LANG_CONFTEST(
         [AC_LANG_PROGRAM(
            [[int main(void);]],
            [[//return(0);]]
         )])
   fi

   # loops throough options
   CFLAGS_WARNINGS=""
   for ac_bindle_warning in ${ac_bindle_warnings_list};do
      AC_MSG_CHECKING(for gcc flag ${ac_bindle_warning})
      if test "x${ac_bindle_warnings_exclude}" != "x${ac_bindle_warnings_exclude% ${ac_bindle_warning} }";then
         AC_MSG_RESULT(skipping)
      else
         ${ac_bindle_cc} ${CFLAGS_WARNINGS} ${ac_bindle_warning} -Werror conftest.c -o conftest.o > /dev/null 2>&1
         if test "x$?" == "x0";then
            CFLAGS_WARNINGS="${CFLAGS_WARNINGS} ${ac_bindle_warning}"
            AC_MSG_RESULT(yes)
         else
            AC_MSG_RESULT(no)
         fi
      fi
   done

   # cleans up files
   rm -f conftest.c

   # export variables
   AC_SUBST(CFLAGS_WARNINGS, "$CFLAGS_WARNINGS")
])dnl


# end of m4 file