Fix #239.

Perhaps.  I could not reproduce the problem.  This explicitly declares the Jsonnet API functions instead of including the header that is causing FNAL problems

img/src/BlobSetReframer.cxx

@@ -120,7 +120,7 @@ struct FromActivity {
             activity[ich->ident()] = act;
         }
 
-        double qtot=0;
+        // double qtot=0;
 
         // check each layer of the blob
         for (const auto& strip : blob.strips()) {
@@ -145,7 +145,7 @@ struct FromActivity {
                 auto strace = std::make_shared<SimpleTrace>(chid, tbin, charge);
                 traces.push_back(strace);
 
-                qtot += act_charge;
+                // qtot += act_charge;
             }
         }
         return traces;

util/inc/WireCellUtil/Persist.h

@@ -27,8 +27,11 @@
 //
 // ./wcb configure --with-jsonnet-libs=gojsonnet [...as usual...]
 //
+// extern "C" {
+// #include "libjsonnet.h"
+// }
 extern "C" {
-#include "libjsonnet.h"
+    struct JsonnetVm;
 }
 #include <boost/filesystem.hpp>
 #include <vector>

util/inc/WireCellUtil/custard/custard.hpp

@@ -95,8 +95,7 @@ namespace custard {
         return sum;
     }
 
-    class Header
-    {                         /* byte offset */
+    struct TarHeader {
         char name_[100];               /*   0 */
         char mode_[8];                 /* 100 */
         char uid_[8];                  /* 108 */
@@ -114,6 +113,10 @@ namespace custard {
         char devminor_[8];             /* 337 */
         char prefix_[155];             /* 345 */
         char padding_[12];             /* 500 */
+    };
+
+    class Header : private TarHeader
+    {                         /* byte offset */
                                        /* 512 */
       public:
         Header(std::string filename="", size_t siz=0)

util/src/Persist.cxx

@@ -15,6 +15,22 @@
 #include <sstream>
 #include <fstream>
 
+// see #239 for why this is here.
+extern "C" {
+    struct JsonnetVm;
+    struct JsonnetVm* jsonnet_make();
+    char *jsonnet_realloc(struct JsonnetVm *vm, char *buf, size_t sz);
+    void jsonnet_destroy(struct JsonnetVm* vmRef);
+    void jsonnet_jpath_add(struct JsonnetVm* vmRef, char* path);
+    void jsonnet_ext_var(struct JsonnetVm* vmRef, char* key, char* value);
+    void jsonnet_ext_code(struct JsonnetVm* vmRef, char* key, char* value);
+    void jsonnet_tla_var(struct JsonnetVm* vmRef, char* key, char* value);
+    void jsonnet_tla_code(struct JsonnetVm* vmRef, char* key, char* value);
+    char* jsonnet_evaluate_file(struct JsonnetVm* vmRef, char* filename, int* e);
+    char* jsonnet_evaluate_snippet(struct JsonnetVm* vmRef, char* filename, char* code, int* e);
+}
+
+
 using spdlog::debug;
 using spdlog::error;
 using spdlog::info;

wscript

@@ -80,6 +80,8 @@ int main(int argc,const char *argv[])
 
 
 def build(bld):
+    bld.env.CXXFLAGS += ['-Wc99-extensions']
+
     bld.load('wcb')
 
 def dumpenv(bld):