[New-bugs-announce] [issue42078] _tracemalloc.c and Clang-cl
Gisle Vanem
report at bugs.python.org
Mon Oct 19 03:03:42 EDT 2020
New submission from Gisle Vanem <gvanem at yahoo.no>:
Related to:
https://bugs.python.org/issue33351
where I commented above the following.
When using `clang-cl` to build, I get the following error:
```
Modules/_tracemalloc.c(55,9): error: declaration of anonymous struct must be a definition
typedef struct
^
Modules/_tracemalloc.c(55,1): warning: typedef requires a name [-Wmissing-declarations]
typedef struct
^~~~~~~
Modules/_tracemalloc.c(68,9): warning: #pragma pack(pop, ...) failed: stack empty [-Wignored-pragmas]
#pragma pack(pop)
^
Modules/_tracemalloc.c(78,5): error: unknown type name 'frame_t'
frame_t frames[1];
^
Modules/_tracemalloc.c(87,103): error: use of undeclared identifier 'frame_t'
static const unsigned long MAX_NFRAME = Py_MIN(UINT16_MAX, ((SIZE_MAX - sizeof(traceback_t)) / sizeof(frame_t) + 1));
^
Modules/_tracemalloc.c(87,103): error: use of undeclared identifier 'frame_t'
Modules/_tracemalloc.c(286,15): error: unknown type name 'frame_t'; did you mean 'trace_t'?
const frame_t *frame1 = &traceback1->frames[i];
^~~~~~~
trace_t
Modules/_tracemalloc.c(100,3): note: 'trace_t' declared here
} trace_t;
^
```
An easy fix is to patch it:
```
--- a/_tracemalloc.c 2020-10-18 12:06:55
+++ b/_tracemalloc.c 2020-10-19 09:02:17
@@ -52,11 +52,11 @@
/* Pack the frame_t structure to reduce the memory footprint on 64-bit
architectures: 12 bytes instead of 16. */
-typedef struct
#ifdef __GNUC__
-__attribute__((packed))
+typedef struct __attribute__((packed))
#elif defined(_MSC_VER)
#pragma pack(push, 4)
+typedef struct
#endif
{
/* filename cannot be NULL: "<unknown>" is used if the Python frame
```
(I'm amazed it's not done before).
----------
components: Build
messages: 378928
nosy: gvanem
priority: normal
severity: normal
status: open
title: _tracemalloc.c and Clang-cl
type: compile error
versions: Python 3.10
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<https://bugs.python.org/issue42078>
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