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# This function is used to add compiler specific warning flags to CFLAGS and
# CXXFLAGS environment variables. Users are expected to specify their own warning
# flags for unknown compilers or special use cases by adding appropriate values
# to CFLAGS and CXXFLAGS.
AC_DEFUN([ACX_ENABLE_WARN], [
acx_enable_warn=""
acx_enable_warn_flags=""
acx_enable_warn_compiler="$CXXVENDOR"
# Allow the user to enable or disable warnings
AC_ARG_ENABLE([warning],
[AC_HELP_STRING([--enable-warning@<:@=yes|no|GNU|clang|Pathscale|Portland|Intel|IBM@:>@],
[Automatically set warnings for compiler.@<:@default=yes@:>@])],
[
case $enableval in
yes)
acx_enable_warn="yes"
;;
no)
acx_enable_warn="no"
;;
*)
acx_enable_warn="yes"
acx_enable_warn_compiler="$enableval"
esac
],
[acx_enable_warn="yes"]
)
# Automatically specify the warning flags for known compilers.
if test $acx_enable_warn != "no"; then
case $acx_enable_warn_compiler in
GNU)
acx_enable_warn_flags="-Wall -Wno-strict-aliasing -Wno-deprecated -Wno-unused-local-typedefs"
;;
clang)
acx_enable_warn_flags="-Wall"
;;
Pathscale)
acx_enable_warn_flags="-Wall"
;;
Portland)
acx_enable_warn_flags=""
;;
Intel)
acx_enable_warn_flags="-Wall -diag-disable remark,279,654,1125"
;;
IBM)
acx_enable_warn_flags="-qflag=w:w"
;;
*)
AC_MSG_WARN([Warning flags not set for $acx_enable_optimal_compile compiler])
;;
esac
# Test the flags and add them to flag variables if successful.
ACX_CHECK_COMPILER_FLAG([C], [CFLAGS], [$acx_enable_warn_flags],
[CFLAGS="$CFLAGS $acx_enable_warn_flags"],
[AC_MSG_WARN([$CC does not accept $acx_enable_warn_flags, no warning flags will be used.])])
ACX_CHECK_COMPILER_FLAG([C++], [CXXFLAGS], [$acx_enable_warn_flags],
[CXXFLAGS="$CXXFLAGS $acx_enable_warn_flags"],
[AC_MSG_WARN([$CXX does not accept $acx_enable_warn_flags, no warning flags will be used.])])
fi
])
|
