ttail/m4/ax_check_cflags.m4

# AX_CHECK_CFLAGS(ADDITIONAL-CFLAGS, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
#
# checks whether the $(CC) compiler accepts the ADDITIONAL-CFLAGS
# if so, they are added to the CXXFLAGS
AC_DEFUN([AX_CHECK_CFLAGS],
[
	AC_MSG_CHECKING([whether compiler accepts "$1"])
	echo "int main(int argc, char** argv){ return 0; }" > conftest.c
	if $CC $CFLAGS -o conftest.o conftest.c [$1] > /dev/null 2>&1
	then
	AC_MSG_RESULT([yes])
	CFLAGS="${CFLAGS} [$1]"
	[$2]
	else
	AC_MSG_RESULT([no])
	[$3]
	fi
])dnl AX_CHECK_CFLAGS