[Issue 19148] Alignment of section does not reflect the maximum alignment of its contents

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19148

--- Comment #3 from Yuxuan Shui <yshuiv7 at gmail.com> ---
I found the actual bug in codegen. In elfobj.c data_start(), when a symbol
doesn't have a explicit alignment (Salignment <= 0), the symbol itself is
aligned, but its section's alignment is not updated.

To reproduce:

__gshared real x;
pragma(msg, x.alignof);

Compiling it prints: 16LU, but the .data section of the resulting object file
is only aligned to 8 bytes.

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