Fedora 26 Looks At Updating Its CFLAGS / CXXFLAGS

[phoronix]

Phoronix: Fedora 26 Looks At Updating Its CFLAGS / CXXFLAGS

The latest change request coming in for Fedora 26 is to update the default C/C++ compiler flags...

http://www.phoronix.com/scan.php?page=news_item&px=Fedora-26-Compiler-Flag-Updates

[FireBurn]

What does Clear Linux use as default?

[Mystro256]

Already changed in rawhide last week; I know because it broke one of my packages on Friday, which I fixed over the weekend.

[janisozaur]

Already changed in rawhide last week; I know because it broke one of my packages on Friday, which I fixed over the weekend.

Both `-Wimplicit-int` and `-Wimplicit-function-declaration` are part of `-Wall`, are you building without it? You should consider turning it on.

[pal666]

Both `-Wimplicit-int` and `-Wimplicit-function-declaration` are part of `-Wall`

but Werror=implicit-int and Werror=implicit-function-declaration are only parts of -Werror

[Mystro256]

Both `-Wimplicit-int` and `-Wimplicit-function-declaration` are part of `-Wall`, are you building without it? You should consider turning it on.

-Wimplicit-function-declaration will not cause a build error by itself, only a warning. Fedora enabled -Werror=implicit-int and -Werror=implicit-function-declaration, so these warnings are now treated as errors.

EDIT: If you're asking why the warning wasn't fixed before, the truthful answer is that I didn't realize they were there.

[RahulSundaram]

Already changed in rawhide last week; I know because it broke one of my packages on Friday, which I fixed over the weekend.

I am curious. What package is this?

[Mystro256]

I am curious. What package is this?

Don't worry, it's nothing remotely critical.
pcsxr, I just migrated it over from RPMFusion a week and a half ago (currently in fedora updates testing).
I've been trying to work with upstream to fix the colossal amount of compile time warnings it produces, so it's not a surprise that it happened to break when Werror flags were enabled.

[janisozaur]

-Wimplicit-function-declaration will not cause a build error by itself, only a warning. Fedora enabled -Werror=implicit-int and -Werror=implicit-function-declaration, so these warnings are now treated as errors.

EDIT: If you're asking why the warning wasn't fixed before, the truthful answer is that I didn't realize they were there.

`-Werror=<x>` is only a harder version of the `-W<x>`. I meant you were compiling without `-Wall` and had errors in your code, which only surfaced when a distro increased their errors to a 20-year old standards. You should seriously consider getting your code compiling with `-Wall` without any warnings raised. `-Werror` is just means to that end.

[Xake]

There is one problem with this, and that is that MANY packages has malformed SPEC-files, so they do not pick up the CFLAGS/CXXFLAGS/LDFLAGS from anywhere at all. And the error reports - even with patches - tends to just be left alone and closed by their auto-close-system when the old release gets out of date.