Fix visibility of createProvider

This resolves Bug 1412

configure

@@ -44,7 +44,7 @@ while [ $# -gt 0 ]; do
 done
 
 
-echo "Configuring qca-tls ..."
+echo "Configuring tqca-tls ..."
 
 if [ "$QC_DEBUG" = "Y" ]; then
 echo

qca-tls.pro

@@ -1,8 +1,8 @@
-# qca-tls qmake profile
+# tqca-tls qmake profile
 
 TEMPLATE = lib
 CONFIG  += qt thread release plugin
-TARGET   = qca-tls
+TARGET   = tqca-tls
 
 !exists(qcaprovider.h) {
   Q_PREFIX = ../../src
@@ -13,9 +13,9 @@ HEADERS += ($$Q_PREFIX)qcaprovider.h
 HEADERS = qca-tls.h
 SOURCES = qca-tls.cpp
 
-DEFINES += QCA_PLUGIN
+DEFINES += TQCA_PLUGIN
 win32:{
-	DEFINES += QCA_PLUGIN_DLL OSSL_097
+	DEFINES += TQCA_PLUGIN_DLL OSSL_097
 	INCLUDEPATH += c:\local\include
 	LIBS += c:\local\lib\libeay32.lib c:\local\lib\ssleay32.lib
 }

qca-tls.qc

@@ -1,5 +1,5 @@
 <qconf>
- <name>qca-tls</name>
+ <name>tqca-tls</name>
  <profile>qca-tls.pro</profile>
  <noprefix/>
  <dep type='openssl'>

qca.h

@@ -49,7 +49,7 @@
 #  endif
 #endif
 #ifndef TQCA_PLUGIN_EXPORT
-#define TQCA_PLUGIN_EXPORT extern "C"
+#define TQCA_PLUGIN_EXPORT extern "C" __attribute__ ((visibility ("default")))
 #endif
 
 class TQHostAddress;