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1899
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1 dnl @synopsis AC_COMPILE_WARNINGS
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2 dnl
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3 dnl Set the maximum warning verbosity according to C and C++ compiler used.
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4 dnl Currently supports g++ and gcc.
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5 dnl
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6 dnl The compiler options are always added CFLAGS and CXXFLAGS even if
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7 dnl these are overidden at configure time. Removing the maximum warning
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8 dnl flags can be removed with --without-maximum-compile-warnings. For example:
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9 dnl
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10 dnl ./configure --without-maximum-compile-warnings CFLAGS= CXXFLAGS=
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11 dnl
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12 dnl @category Misc
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13 dnl @author Loic Dachary <loic@senga.org>
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14 dnl @author William Fulton <wsf@fultondesigns.co.uk>
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15 dnl @version 2005-04-29
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16 dnl @license GPLWithACException
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17
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18 AC_DEFUN([AC_COMPILE_WARNINGS], [
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19 AC_MSG_CHECKING([maximum warning verbosity option])
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20 AC_REQUIRE([AC_PROG_CC])
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21 AC_REQUIRE([AC_PROG_CXX])
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22
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23 AC_ARG_WITH([maximum-compile-warnings],
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24 AS_HELP_STRING([--without-maximum-compile-warnings],
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25 [Disable maximum warning verbosity]),
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26 [ac_compile_warnings_on="$withval"],
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27 [ac_compile_warnings_on=""])
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28
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29 if test x"$ac_compile_warnings_on" = xno
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30 then
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31 ac_compile_warnings_msg=no
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32 else
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33 if test -n "$CXX"
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34 then
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35 if test "$GXX" = "yes"
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36 then
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37 ac_compile_warnings_opt='-Wall -W -ansi -pedantic'
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38 fi
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39 CXXFLAGS="$CXXFLAGS $ac_compile_warnings_opt"
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40 ac_compile_warnings_msg="$ac_compile_warnings_opt for C++"
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41 fi
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42
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43 if test -n "$CC"
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44 then
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45 if test "$GCC" = "yes"
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46 then
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47 ac_compile_warnings_opt='-Wall -W -ansi -pedantic'
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48 fi
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49 CFLAGS="$CFLAGS $ac_compile_warnings_opt"
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50 ac_compile_warnings_msg="$ac_compile_warnings_msg $ac_compile_warnings_opt for C"
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51 fi
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52 fi
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53 AC_MSG_RESULT([$ac_compile_warnings_msg])
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54 unset ac_compile_warnings_msg
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55 unset ac_compile_warnings_opt
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56 ])
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