From afb21342ead475a12636f29f7cd77cbe38d05ed1 Mon Sep 17 00:00:00 2001
From: Mikhail Paulyshka <me@mixaill.tk>
Date: Wed, 26 Apr 2017 00:37:37 +0300
Subject: bindexplib: fix constants symbols export

---
 Source/bindexplib.cxx                | 32 +++++++++++++-------------------
 Tests/RunCMake/AutoExportDll/foo.c   |  2 ++
 Tests/RunCMake/AutoExportDll/say.cxx | 10 ++++++++++
 3 files changed, 25 insertions(+), 19 deletions(-)

diff --git a/Source/bindexplib.cxx b/Source/bindexplib.cxx
index 6026a57..691e3ae 100644
--- a/Source/bindexplib.cxx
+++ b/Source/bindexplib.cxx
@@ -235,35 +235,29 @@ public:
               symbol.erase(posAt);
             }
           }
-          // For i386 builds we don't need to remove _
+          // For i386 builds we need to remove _
           if (this->IsI386 && symbol[0] == '_') {
             symbol.erase(0, 1);
           }
 
-          /*
-          Check whether it is "Scalar deleting destructor" and
-          "Vector deleting destructor"
-          */
+          // Check whether it is "Scalar deleting destructor" and "Vector
+          // deleting destructor"
+          // if scalarPrefix and vectorPrefix are not found then print the
+          // symbol
           const char* scalarPrefix = "??_G";
           const char* vectorPrefix = "??_E";
-          // original code had a check for
-          // symbol.find("real@") == std::string::npos)
-          // but if this disallows memmber functions with the name real
-          // if scalarPrefix and vectorPrefix are not found then print
-          // the symbol
           if (symbol.compare(0, 4, scalarPrefix) &&
               symbol.compare(0, 4, vectorPrefix)) {
             SectChar = this->SectionHeaders[pSymbolTable->SectionNumber - 1]
                          .Characteristics;
-            if (!pSymbolTable->Type && (SectChar & IMAGE_SCN_MEM_WRITE)) {
-              // Read only (i.e. constants) must be excluded
-              this->DataSymbols.insert(symbol);
-            } else {
-              if (pSymbolTable->Type || !(SectChar & IMAGE_SCN_MEM_READ) ||
-                  (SectChar & IMAGE_SCN_MEM_EXECUTE)) {
-                this->Symbols.insert(symbol);
-              } else {
-                // printf(" strange symbol: %s \n",symbol.c_str());
+
+            if (SectChar & IMAGE_SCN_MEM_EXECUTE) {
+              this->Symbols.insert(symbol);
+            } else if (SectChar & IMAGE_SCN_MEM_READ) {
+              // skip __real@ and __xmm@
+              if (symbol.find("_real") == std::string::npos &&
+                  symbol.find("_xmm") == std::string::npos) {
+                this->DataSymbols.insert(symbol);
               }
             }
           }
diff --git a/Tests/RunCMake/AutoExportDll/foo.c b/Tests/RunCMake/AutoExportDll/foo.c
index 4b1318b..e70fbb5 100644
--- a/Tests/RunCMake/AutoExportDll/foo.c
+++ b/Tests/RunCMake/AutoExportDll/foo.c
@@ -13,3 +13,5 @@ int bar()
 {
   return 5;
 }
+
+const char testconst[] = "testconst";
diff --git a/Tests/RunCMake/AutoExportDll/say.cxx b/Tests/RunCMake/AutoExportDll/say.cxx
index 51060e8..eb9c0ff 100644
--- a/Tests/RunCMake/AutoExportDll/say.cxx
+++ b/Tests/RunCMake/AutoExportDll/say.cxx
@@ -13,6 +13,14 @@ int WINAPI foo();
 int bar();
 int objlib();
 void justnop();
+
+// test const export
+#ifdef _WIN32
+// data symbols must be explicitly imported
+__declspec(dllimport) extern const char testconst[];
+#else
+extern const char testconst[];
+#endif
 }
 
 // test c++ functions
@@ -43,6 +51,8 @@ int main()
   bar();
   objlib();
   printf("\n");
+  printf("%s", testconst);
+  printf("\n");
 #ifdef HAS_JUSTNOP
   justnop();
 #endif
-- 
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