Enable sessions in free-threading wheels

Author: lballabio

.ci/wheels/before_all_linux_nogil.sh

@@ -10,6 +10,6 @@ cd ..
 
 # Build QuantLib
 cd QuantLib-1.*/
-./configure --disable-static --enable-thread-safe-observer-pattern --disable-test-suite --enable-skip-examples --enable-unity-build CXXFLAGS="${CXXQLFLAGS}"
+./configure --disable-static --enable-thread-safe-observer-pattern --enable-sessions --disable-test-suite --enable-skip-examples --enable-unity-build CXXFLAGS="${CXXQLFLAGS}"
 make -j 4 install
 cd ..

.ci/wheels/userconfig_nogil.hpp

@@ -73,7 +73,7 @@
    per-thread.
 */
 #ifndef QL_ENABLE_SESSIONS
-//#   define QL_ENABLE_SESSIONS
+#   define QL_ENABLE_SESSIONS
 #endif
 
 /* If defined, a thread-safe (but less performant) version of the

.github/workflows/wheels.yml

@@ -161,7 +161,7 @@ jobs:
       run: |
         tar xfz QuantLib-${{ needs.detect-version.outputs.version }}.tar.gz
         cd QuantLib-${{ needs.detect-version.outputs.version }}/
-        ./configure --disable-shared --with-boost-include=`brew --prefix`/include --enable-unity-build --enable-thread-safe-observer-pattern --disable-test-suite --enable-skip-examples
+        ./configure --disable-shared --with-boost-include=`brew --prefix`/include --enable-unity-build --enable-thread-safe-observer-pattern --enable-sessions --disable-test-suite --enable-skip-examples
         make -j3 CXXFLAGS="-std=c++17 -g0 -O3 -fno-common -dynamic -DNDEBUG -fwrapv" LDFLAGS="-fno-common -dynamic -DNDEBUG -fwrapv"
         sudo make install
     - name: Unpack QuantLib-SWIG