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dnl Copyright (C) 2008 Kim Woelders
dnl This code is public domain and can be freely used or copied.
dnl Macro to set compiler warning flags
dnl Provides configure argument --enable-werror to stop compilation on warnings
dnl Usage: AC_C_WARNFLAGS([LANG])
dnl Set LANG to 'cpp' when compiling for C++
AC_DEFUN([AC_C_WARNFLAGS], [
define(ac_c_compile_cpp, ifelse([$1], [cpp], [yes], [no]))
AC_ARG_ENABLE(werror,
[ --enable-werror treat compiler warnings as errors @<:@default=no@:>@],,
enable_werror=no)
if test "x$GCC" = "xyes"; then
CWARNFLAGS="-W -Wall -Waggregate-return -Wcast-align -Wpointer-arith -Wshadow -Wwrite-strings"
dnl # ignore some warnings for now...
CWARNFLAGS="$CWARNFLAGS -Wno-unused-parameter"
ifelse(ac_c_compile_cpp, no, [
CWARNFLAGS="$CWARNFLAGS -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes"
],)
if test "x$enable_werror" = "xyes"; then
CWARNFLAGS="$CWARNFLAGS -Werror"
fi
fi
AC_SUBST(CWARNFLAGS)
])
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