fix: Recent journaling changes break with some fmtlib versions (#1715)

Certain fmt library versions don't automatically know how to format
atomics. Explicitly load them to turn into regular ints to avoid new
build errors introduced by the recent journaling changes.

Signed-off-by: Larry Gritz <lg@larrygritz.com>

.github/workflows/ci.yml

@@ -333,7 +333,7 @@ jobs:
             os: ubuntu-22.04
             cxx_compiler: g++-11
             cxx_std: 17
-            fmt_ver: 9.1.0
+            fmt_ver: 10.1.0
             openexr_ver: v3.1.7
             openimageio_ver: master
             pybind11_ver: v2.10.0

src/liboslcomp/ast.cpp

@@ -46,7 +46,7 @@ ScopeExit print_node_counts([]() {
     for (int i = 0; i < ASTNode::_last_node; ++i)
         if (node_counts[i] > 0)
             Strutil::print("ASTNode type {:2}: {:5}   (peak {:5})\n", i,
-                           node_counts[i], node_counts_peak[i]);
+                           node_counts[i].load(), node_counts_peak[i].load());
 });
 }  // namespace
 #endif

src/liboslexec/journal.cpp

@@ -338,13 +338,13 @@ Reader::process()
     if (m_org.additional_bytes_required != 0) {
         std::string overfill_message = OSL::fmtformat(
             "Journal sized {} bytes couldn't capture all prints, warnings, and errors.  Additional {} bytes would be required",
-            m_org.buf_size, m_org.additional_bytes_required);
+            m_org.buf_size, m_org.additional_bytes_required.load());
         m_reporter.report_warning(-1, -1, overfill_message);
     }
     if (m_org.exceeded_page_size != 0) {
         std::string exceeded_message = OSL::fmtformat(
             "Journal page size {} exceeded, largest individual message sized {} bytes.  Consider increasing your page size.",
-            m_org.page_size, m_org.exceeded_page_size);
+            m_org.page_size, m_org.exceeded_page_size.load());
         m_reporter.report_warning(-1, -1, exceeded_message);
     }
 }
@@ -436,4 +436,4 @@ Reader::process_entries_for_thread(int thread_index)
 
 }  //namespace journal
 
-OSL_NAMESPACE_EXIT
+OSL_NAMESPACE_EXIT