diff options
| author | Tom Lane | 2022-02-18 03:45:34 +0000 |
|---|---|---|
| committer | Tom Lane | 2022-02-18 03:45:34 +0000 |
| commit | 2e30d77a196810f7e9d57709a942b1826fd1bb43 (patch) | |
| tree | 180a8a1b0ed5ba906f5dcdd171a371cce1fe5d26 /src/tools | |
| parent | a9e186da81d9965789b1a7ab869329eabe3595c3 (diff) | |
Suppress warning about stack_base_ptr with late-model GCC.
GCC 12 complains that set_stack_base is storing the address of
a local variable in a long-lived pointer. This is an entirely
reasonable warning (indeed, it just helped us find a bug);
but that behavior is intentional here. We can work around it
by using __builtin_frame_address(0) instead of a specific local
variable; that produces an address a dozen or so bytes different,
in my testing, but we don't care about such a small difference.
Maybe someday a compiler lacking that function will start to issue
a similar warning, but we'll worry about that when it happens.
Patch by me, per a suggestion from Andres Freund. Back-patch to
v12, which is as far back as the patch will go without some pain.
(Recently-established project policy would permit a back-patch as
far as 9.2, but I'm disinclined to expend the work until GCC 12
is much more widespread.)
Discussion: https://postgr.es/m/3773792.1645141467@sss.pgh.pa.us
Diffstat (limited to 'src/tools')
| -rw-r--r-- | src/tools/msvc/Solution.pm | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/tools/msvc/Solution.pm b/src/tools/msvc/Solution.pm index c983f506f97..acd3b8de066 100644 --- a/src/tools/msvc/Solution.pm +++ b/src/tools/msvc/Solution.pm @@ -441,6 +441,7 @@ sub GenerateFiles HAVE__BUILTIN_CLZ => undef, HAVE__BUILTIN_CONSTANT_P => undef, HAVE__BUILTIN_CTZ => undef, + HAVE__BUILTIN_FRAME_ADDRESS => undef, HAVE__BUILTIN_OP_OVERFLOW => undef, HAVE__BUILTIN_POPCOUNT => undef, HAVE__BUILTIN_TYPES_COMPATIBLE_P => undef, |