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Add check for large files in meson.build

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A similar check existed in the MSVC scripts that have been removed in
v17 by 1301c80b21, but nothing of the kind was checked in meson when
building with a 4-byte off_t.

This commit adds a check to fail the builds when trying to use a
relation file size higher than 1GB when off_t is 4 bytes, like
./configure, rather than detecting these failures at runtime because the
code is not able to handle large files in this case.

Backpatch down to v16, where meson has been introduced.

Discussion: https://postgr.es/m/aQ0hG36IrkaSGfN8@paquier.xyz
Backpatch-through: 16
This commit is contained in:
Michael Paquier
2025-11-12 09:02:27 +09:00
parent 6956bca515
commit 79cd66f28c
1 changed files with 8 additions and 0 deletions
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8
meson.build
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@@ -452,6 +452,14 @@ else
segsize = (get_option('segsize') * 1024 * 1024 * 1024) / blocksize segsize = (get_option('segsize') * 1024 * 1024 * 1024) / blocksize
endif endif
# If we don't have largefile support, can't handle segment size >= 2GB.
if cc.sizeof('off_t', args: test_c_args) < 8
segsize_bytes = segsize * blocksize
if segsize_bytes >= (2 * 1024 * 1024 * 1024)
error('Large file support is not enabled. Segment size cannot be larger than 1GB.')
endif
endif
cdata.set('BLCKSZ', blocksize, description: cdata.set('BLCKSZ', blocksize, description:
'''Size of a disk block --- this also limits the size of a tuple. You can set '''Size of a disk block --- this also limits the size of a tuple. You can set
it bigger if you need bigger tuples (although TOAST should reduce the need it bigger if you need bigger tuples (although TOAST should reduce the need