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qtwebkit: fixing build / reducing build log size

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GCC 8 introduced a new type of warning `-Wclass-memaccess` which
is included in `-Wall`. This warnings spits out *a million* of warnings
like the following:

```
[...]
/build/source/Source/WTF/wtf/Vector.h:128:15: warning: 'void* memcpy(void*, const void*, size_t)' writing to an object of type 'class WTF::RefPtr<WebCore::TransformOperation>' with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
         memcpy(dst, src, reinterpret_cast<const char*>(srcEnd) - reinterpret_cast<const char*>(src));
[...]
``

Logs demonstrating the issue:
https://hydra.nixos.org/build/100205478/nixlog/1

While I don't think disabling warnings is the best way to deal with this,
there is alrady precedent for this package and I don't feel confident enough
to either patch or bump this package.

Please view this as a low-friction sub-optimal suggestion in case nobody else
has a better fix.
This commit is contained in:
Dima 2019-09-10 18:21:53 +02:00
parent a9b1f444b5
commit 6f1ad0676f
1 changed files with 6 additions and 2 deletions
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8
pkgs/development/libraries/qt-5/modules/qtwebkit.nix
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@ -51,8 +51,12 @@ qtModule {
'';
NIX_CFLAGS_COMPILE =
# with gcc7 this warning blows the log over Hydra's limit
[ "-Wno-expansion-to-defined" ]
[
# with gcc7 this warning blows the log over Hydra's limit
"-Wno-expansion-to-defined"
# with gcc8, -Wclass-memaccess became part of -Wall and this too exceeds the logging limit
"-Wno-class-memaccess"
]
# with clang this warning blows the log over Hydra's limit
++ optional stdenv.isDarwin "-Wno-inconsistent-missing-override"
++ optionals flashplayerFix