Automatically find built libraries

Search for libjavaProfiler.so if not at expected release path.
This handles cases where build produces libraries at different
paths (debug vs release, different platforms, etc).

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: jbachorik

ddprof-lib/benchmarks/branch-prediction/compare_branch_prediction.sh

@@ -142,28 +142,40 @@ main() {
     cd "${BASELINE_WORKTREE}"
     ./gradlew ddprof-lib:build -x test
 
-    # Verify baseline library was built
+    # Find the baseline library (prefer release, fallback to any .so)
     local baseline_lib_check="${BASELINE_WORKTREE}/ddprof-lib/build/lib/main/release/linux/x64/libjavaProfiler.so"
     if [ ! -f "${baseline_lib_check}" ]; then
-        log_error "Baseline build did not produce library at ${baseline_lib_check}"
-        log_info "Checking what was built:"
-        find "${BASELINE_WORKTREE}/ddprof-lib/build" -name "*.so" -type f 2>/dev/null || true
-        exit 1
+        log_warn "Expected library not at ${baseline_lib_check}, searching for alternatives..."
+        baseline_lib_check=$(find "${BASELINE_WORKTREE}/ddprof-lib/build" -name "libjavaProfiler.so" -type f 2>/dev/null | grep -E "(release|main)" | head -1)
+        if [ -z "${baseline_lib_check}" ]; then
+            log_error "Baseline build did not produce any libjavaProfiler.so"
+            log_info "Files built:"
+            find "${BASELINE_WORKTREE}/ddprof-lib/build" -name "*.so" -type f 2>/dev/null || true
+            exit 1
+        fi
+        log_info "Using baseline library: ${baseline_lib_check}"
     fi
+    BASELINE_LIB="${baseline_lib_check}"
 
     # Build optimized
     log_step "4/6: Building optimized version..."
     cd "${OPTIMIZED_WORKTREE}"
     ./gradlew ddprof-lib:build -x test
 
-    # Verify optimized library was built
+    # Find the optimized library (prefer release, fallback to any .so)
     local optimized_lib_check="${OPTIMIZED_WORKTREE}/ddprof-lib/build/lib/main/release/linux/x64/libjavaProfiler.so"
     if [ ! -f "${optimized_lib_check}" ]; then
-        log_error "Optimized build did not produce library at ${optimized_lib_check}"
-        log_info "Checking what was built:"
-        find "${OPTIMIZED_WORKTREE}/ddprof-lib/build" -name "*.so" -type f 2>/dev/null || true
-        exit 1
+        log_warn "Expected library not at ${optimized_lib_check}, searching for alternatives..."
+        optimized_lib_check=$(find "${OPTIMIZED_WORKTREE}/ddprof-lib/build" -name "libjavaProfiler.so" -type f 2>/dev/null | grep -E "(release|main)" | head -1)
+        if [ -z "${optimized_lib_check}" ]; then
+            log_error "Optimized build did not produce any libjavaProfiler.so"
+            log_info "Files built:"
+            find "${OPTIMIZED_WORKTREE}/ddprof-lib/build" -name "*.so" -type f 2>/dev/null || true
+            exit 1
+        fi
+        log_info "Using optimized library: ${optimized_lib_check}"
     fi
+    OPTIMIZED_LIB="${optimized_lib_check}"
 
     # Test baseline
     log_step "5/6: Testing baseline version..."
@@ -178,17 +190,11 @@ main() {
     # Run tests from optimized worktree but with baseline library
     cd "${OPTIMIZED_WORKTREE}/ddprof-lib/benchmarks/branch-prediction"
 
-    # Use absolute path for baseline library
-    local baseline_lib
-    baseline_lib="$(cd "${BASELINE_WORKTREE}" && pwd)/ddprof-lib/build/lib/main/release/linux/x64/libjavaProfiler.so"
-
-    if [ ! -f "${baseline_lib}" ]; then
-        log_error "Baseline profiler library not found at ${baseline_lib}"
-        exit 1
-    fi
+    log_info "Using baseline library: ${BASELINE_LIB}"
+    log_info "Using optimized library: ${OPTIMIZED_LIB}"
 
     # Temporarily override PROFILER_LIB for baseline test
-    PROFILER_LIB_OVERRIDE="${baseline_lib}" \
+    PROFILER_LIB_OVERRIDE="${BASELINE_LIB}" \
     "${baseline_test_script}" "${benchmark}" "baseline"
 
     # Test optimized