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Look for OpenSSL in the first place, fallback to GnuTLS if not found

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Fix test building in some environments
This commit is contained in:
Carles Fernandez
2024-06-29 11:10:35 +02:00
parent 359693c0e8
commit db5466832c
10 changed files with 410 additions and 429 deletions
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9
docs/CHANGELOG.md
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@@ -55,6 +55,15 @@ All notable changes to GNSS-SDR will be documented in this file.
This change has a downside in maintainability, since the source code becomes
plagued with preprocessor directives required to maintain compatibility both
with gflags and glog, and with Abseil.
- Historically, GNSS-SDR linked against the GnuTLS library for cryptographic
functions. If GnuTLS was not found, then the building system looked for and
linked against OpenSSL as a fallback. This was due to the OpenSSL 1.x dual
license scheme, which was incompatible with GPL v3.0 license, preventing it
from being a mandatory dependency for GNSS-SDR in most GNU/Linux
distributions. This issue was solved with the release of OpenSSL 3.0.0, which
transitioned to the Apache License 2.0, fully compatible with GPL v3.0.
Accordingly, the GNSS-SDR building system now looks for OpenSSL in the first
place and, if not found, then it looks for GnuTLS as a fallback.
### Improvements in Usability: