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bug#55595: 29.0.50; Compilation warnings on macOS
From: |
Eli Zaretskii |
Subject: |
bug#55595: 29.0.50; Compilation warnings on macOS |
Date: |
Mon, 23 May 2022 18:53:42 +0300 |
> Date: Mon, 23 May 2022 17:42:15 +0200
> From: Rudolf Adamkovič via "Bug reports for GNU Emacs,
> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>
>
> FYI, I see the following compilation warnings (@ commit 5a1a67a256):
>
> CC comp.o
> comp.c:2816:24: warning: pragma diagnostic pop could not pop, no matching
> push [-Wunknown-pragmas]
> #pragma GCC diagnostic pop
> ^
> comp.c:4698:24: warning: pragma diagnostic pop could not pop, no matching
> push [-Wunknown-pragmas]
> #pragma GCC diagnostic pop
> ^
> comp.c:4714:24: warning: pragma diagnostic pop could not pop, no matching
> push [-Wunknown-pragmas]
> #pragma GCC diagnostic pop
> ^
> comp.c:4967:24: warning: pragma diagnostic pop could not pop, no matching
> push [-Wunknown-pragmas]
> #pragma GCC diagnostic pop
> ^
> comp.c:5351:11: warning: variable 'data_ephemeral_vec' is used uninitialized
> whenever 'if' condition is false [-Wsometimes-uninitialized]
> if (!recursive_load)
> ^~~~~~~~~~~~~~~
> comp.c:5365:28: note: uninitialized use occurs here
> data_ephemeral_vec = data_ephemeral_vec;
> ^~~~~~~~~~~~~~~~~~
> comp.c:5351:7: note: remove the 'if' if its condition is always true
> if (!recursive_load)
> ^~~~~~~~~~~~~~~~~~~~
> comp.c:5345:46: note: initialize the variable 'data_ephemeral_vec' to silence
> this warning
> Lisp_Object volatile data_ephemeral_vec;
> ^
> = NULL
Is this GCC or Clang?
If the latter, I guess we should disable -Wunknown-pragmas for it.
The last warning is silly, but I guess it cannot harm anyone to
initialize the variable where it's declared.