otel: add build tooling to include otel code

Adds the --otel flag to the configure command and the various build time
variables and checks that are needed in this flow.

It also includes the nxt_otel.c and nxt_otel.h files that are needed for
the rest of Unit to talk to the compiled static library that's generated
from the rust crate.

Signed-off-by: Ava Hahn <a.hahn@f5.com>
Co-authored-by: Gabor Javorszky <g.javorszky@f5.com>
Signed-off-by: Gabor Javorszky <g.javorszky@f5.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/configure b/configure
index 6929d41d..05a992ee 100755
--- a/configure
+++ b/configure
@@ -179,6 +179,12 @@ if [ $NXT_NJS != NO ]; then
     . auto/njs
 fi
 
+NXT_OTEL_LIB_DIR=src/otel
+if [ $NXT_OTEL != NO ]; then
+    . auto/otel
+    NXT_LIB_AUX_LIBS="$NXT_LIB_AUX_LIBS $NXT_OTEL_LIBS"
+fi
+
 . auto/make
 . auto/fuzzing
 . auto/summary