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AC_COMPILE_WARNINGS
Set the maximum warning verbosity according to C and C++ compiler used. Currently supports g++ and gcc.
The compiler options are always added CFLAGS and CXXFLAGS even if these are overidden at configure time. Removing the maximum warning flags can be removed with --without-maximum-compile-warnings. For example:
./configure --without-maximum-compile-warnings CFLAGS= CXXFLAGS=
Loic Dachary <loic@senga.org>, William Fulton <wsf@fultondesigns.co.uk>
2005-04-29
AC_DEFUN([AC_COMPILE_WARNINGS], [
AC_MSG_CHECKING([maximum warning verbosity option])
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_PROG_CXX])
AC_ARG_WITH([maximum-compile-warnings],
AS_HELP_STRING([--without-maximum-compile-warnings],
[Disable maximum warning verbosity]),
[ac_compile_warnings_on="$withval"],
[ac_compile_warnings_on=""])
if test x"$ac_compile_warnings_on" = xno
then
ac_compile_warnings_msg=no
else
if test -n "$CXX"
then
if test "$GXX" = "yes"
then
ac_compile_warnings_opt='-Wall -W -ansi -pedantic'
fi
CXXFLAGS="$CXXFLAGS $ac_compile_warnings_opt"
ac_compile_warnings_msg="$ac_compile_warnings_opt for C++"
fi
if test -n "$CC"
then
if test "$GCC" = "yes"
then
ac_compile_warnings_opt='-Wall -W -ansi -pedantic'
fi
CFLAGS="$CFLAGS $ac_compile_warnings_opt"
ac_compile_warnings_msg="$ac_compile_warnings_msg $ac_compile_warnings_opt for C"
fi
fi
AC_MSG_RESULT([$ac_compile_warnings_msg])
unset ac_compile_warnings_msg
unset ac_compile_warnings_opt
])