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id = 2209
title = "no 'system' llibfdt (or too old), subprojects/dtc/ populated, ./configure --disable-download fails"
state = "closed"
created_at = "2024-03-05T18:21:51.436Z"
closed_at = "2024-03-08T09:15:08.175Z"
labels = []
url = "https://gitlab.com/qemu-project/qemu/-/issues/2209"
host-os = "Linux -- CentOS7 w/ old dtc, Ubuntu w/o dtc, Fedora w/o dtc"
host-arch = "x86_64"
qemu-version = "commit db596ae19040574e41d086e78469014191d7d7fc (HEAD -> master, origin/staging, origin/master, origin/HEAD)"
guest-os = "n/a"
guest-arch = "n/a"
description = """./configure ... --disable-download, with subprojects/ pre-populated, fails."""
reproduce = """1. ensure libfdt/dtc files/libs/binaries are *not* found in system
2. have subprojects/dtc pre-populated
3. ./configure --target-list=riscv32-softmmu --prefix=/opt/riscv --enable-debug --without-default-features --without-default-devices --disable-download
configure fails with:
```
../meson.build:3171:13: ERROR: C shared or static library 'fdt' not found
A full log can be found at /home/too/vc/ext/qemu/build/meson-logs/meson-log.txt
ERROR: meson setup failed
```
If I outcomment the following lines in meson.build:
```
#if get_option('wrap_mode') == 'nodownload'
# fdt_opt = 'system'
#endif
```
Then the above command line works (with --disable-download)"""
additional = """The case is where one wants to ensure that configure does not try to access
network while doing its job. And in a system where dtc/libfdt is not available,
(or is too old, line in Centos/RHEL 7) one has dowloaded the files already in
subprojects/dtc/.
The meson.build clearly sets (as of 2024-03-05) expectation that dtc/libfdt/
has to come from 'system' if 'wrap_mode' is set to 'nodownload'.
Without this check it it works nicely -- and if subprojects/dtc/ was not populated,
the error message is
```
Library fdt found: NO
../meson.build:3187:18: ERROR: Automatic wrap-based subproject downloading is disabled
A full log can be found at /home/too/vc/ext/qemu/build/meson-logs/meson-log.txt
ERROR: meson setup failed
```
So -- to me -- that looks like it could be a suitable solution to this problem."""
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