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build: add opt-in E3_AGENT build option for the O-RAN E3 agent

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Introduce the E3_AGENT CMake option (default OFF) and the matching
--build-e3 flag in build_oai so the E3 agent for O-RAN dApps can be
compiled opt-in. Gate the E3AP subdirectory and the nr-softmodem
linkage behind the option, and register an E3AP log component
together with its legacy T-tracer message IDs.

The E3 interface (nGRG) lets the gNB exchange real-time reports and
controls with external dApps. Keeping it behind a build flag leaves
the default CI build unchanged and avoids pulling in the external
libe3 dependency unless the agent is explicitly requested.

Signed-off-by: Andrea Lacava <thecave003@gmail.com>
This commit is contained in:
Andrea Lacava
2026-06-17 13:13:37 -04:00
parent 31eb466a7d
commit 447ff67aba
5 changed files with 43 additions and 0 deletions
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1
common/utils/LOG/log.h
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@@ -155,6 +155,7 @@ static const char *const flag_name[] = {FOREACH_FLAG(FLAG_TEXT) ""};
COMP_DEF(NFAPI_PNF, log) \
COMP_DEF(ITTI, log) \
COMP_DEF(UTIL, log) \
COMP_DEF(E3AP, log) \
COMP_DEF(MAX_LOG_PREDEF_COMPONENTS, )
#define COMP_ENUM(comp, file_extension) comp,

21
common/utils/T/T_messages.txt
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@@ -434,6 +434,27 @@ ID = LEGACY_MAC_TRACE
GROUP = ALL:LEGACY_MAC:LEGACY_GROUP_TRACE:LEGACY
FORMAT = string,log
ID = LEGACY_E3AP_INFO
DESC = E3AP legacy logs - info level
GROUP = ALL:LEGACY_E3AP:LEGACY_GROUP_INFO:LEGACY
FORMAT = string,log
ID = LEGACY_E3AP_ERROR
DESC = E3AP legacy logs - error level
GROUP = ALL:LEGACY_E3AP:LEGACY_GROUP_ERROR:LEGACY
FORMAT = string,log
ID = LEGACY_E3AP_WARNING
DESC = E3AP legacy logs - warning level
GROUP = ALL:LEGACY_E3AP:LEGACY_GROUP_WARNING:LEGACY
FORMAT = string,log
ID = LEGACY_E3AP_DEBUG
DESC = E3AP legacy logs - debug level
GROUP = ALL:LEGACY_E3AP:LEGACY_GROUP_DEBUG:LEGACY
FORMAT = string,log
ID = LEGACY_E3AP_TRACE
DESC = E3AP legacy logs - trace level
GROUP = ALL:LEGACY_E3AP:LEGACY_GROUP_TRACE:LEGACY
FORMAT = string,log
ID = LEGACY_NR_MAC_INFO
DESC = NR_MAC legacy logs - info level
GROUP = ALL:LEGACY_NR_MAC:LEGACY_GROUP_INFO:LEGACY