Re: Lots of -Wunused-command-line-argument warnings from clang

[Thomas Dickey]

On Mon, Sep 02, 2019 at 06:39:43PM +0200, Sven Joachim wrote:
> Building ncurses with clang produces the following warning (line-wrapped
> for readability) on every invocation of the compiler:
> 
> ,----
> | clang: warning: argument unused during compilation:
> | '--param max-inline-insns-single=1200' [-Wunused-command-line-argument]
> `----
> 
> It goes without saying that this makes build logs pretty much
> unreadable. :-(
> 
> There are CF_CLANG_COMPILER and CF_C_INLINE functions in aclocal.m4
> which I think are meant to avoid this, but it does not work for me.

I haven't updated those recently,
but in a quick check, don't see a new problem.

> Tested with clang-8 and clang-7 on Debian unstable, but I think the
> problem had been around for quite a while already.  I did not specify
> any fancy configure options, just ran
> 
> ,----
> | $ ./configure CC=clang-7 CXX=clang++-7
> `----
> 
> Any ideas?

add --enable-warnings

I seem to recall someone mentioning this recently: clang without any
options will warn about things that gcc does not.  My macros are designed
to filter/amend/whatever when warnings are wanted.

Of course doing that will show some warnings that you didn't see before,
but I work on those, to reduce them :-)

-- 
Thomas E. Dickey <address@hidden>
https://invisible-island.net
ftp://ftp.invisible-island.net

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