[Buildroot] [PATCH 1/1] minizip: fix display of comment

[Baruch Siach <baruch@tkos.co.il>]

Hi Fabrice,

Fabrice Fontaine writes:
> Le dim. 2 d?c. 2018 ? 11:32, Baruch Siach <baruch@tkos.co.il> a ?crit :
>>
>> Hi Fabrice,
>>
>> Fabrice Fontaine writes:
>> > Commit e13855c48f21eaee07a81f8b02678839be274a45 wrongly added
>> > depends on BR2_TOOLCHAIN_USES_UCLIBC && !BR2_USE_MMU
>> > to display the comment "minizip needs a toolchain w/ threads, wchar"
>>
>> Why is it wrong? This dependency is meant to hide the comment in the
>> !(BR2_TOOLCHAIN_USES_UCLIBC && !BR2_USE_MMU) case.
> It is wrong because, in commit
> e13855c48f21eaee07a81f8b02678839be274a45, I added in minizip/Config.in
> (and in libbsd/Config.in):
> config BR2_PACKAGE_MINIZIP
>    depends on !(BR2_TOOLCHAIN_USES_UCLIBC && !BR2_USE_MMU) # libbsd
> [...]
> comment "minizip needs a toolchain w/ threads, wchar"
>     depends on BR2_TOOLCHAIN_USES_UCLIBC && !BR2_USE_MMU
>     depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_USE_WCHAR
>
> As a result, the comment is not displayed with an uclibc toolchain
> with MMU but without wchar.
> So, the user don't know that it has just to select wchar to be able to
> select minizip.

I always find negative logic confusing, so let's do it one step at a
time.

In the case of non wchar uClibc toolchain with MMU:

The expression

  depends on BR2_TOOLCHAIN_USES_UCLIBC && !BR2_USE_MMU

is true because both conditions are true.

The expression

  depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_USE_WCHAR

is also true because the right condition (!BR2_USE_WCHAR) is true.

End result: the comment is displayed.

What is the issue you are fixing here?

The same question applies to your libbsd patch.

baruch

>> > Set the correct dependency:
>> > depends on !(BR2_TOOLCHAIN_USES_UCLIBC && !BR2_USE_MMU)
>> >
>> > Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
>> > ---
>> >  package/minizip/Config.in | 2 +-
>> >  1 file changed, 1 insertion(+), 1 deletion(-)
>> >
>> > diff --git a/package/minizip/Config.in b/package/minizip/Config.in
>> > index 4bc12a0d7e..ff8b5b209a 100644
>> > --- a/package/minizip/Config.in
>> > +++ b/package/minizip/Config.in
>> > @@ -20,5 +20,5 @@ config BR2_PACKAGE_MINIZIP_DEMOS
>> >
>> >  comment "minizip needs a toolchain w/ threads, wchar"
>> >       depends on BR2_PACKAGE_LIBBSD_ARCH_SUPPORTS
>> > -     depends on BR2_TOOLCHAIN_USES_UCLIBC && !BR2_USE_MMU
>> > +     depends on !(BR2_TOOLCHAIN_USES_UCLIBC && !BR2_USE_MMU)
>> >       depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_USE_WCHAR

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