Remove a level of indirection to access compatible index version

Should fix cygwin

Author: milot-mirdita

src/linclust/LinsearchIndexReader.cpp

@@ -15,6 +15,7 @@
 #define SIZE_T_MAX ((size_t) -1)
 #endif
 
+extern const char* index_version_compatible;
 
 template <int TYPE>
 size_t LinsearchIndexReader::pickCenterKmer(KmerPosition<short> *hashSeqPair, size_t splitKmerCount) {
@@ -241,7 +242,7 @@ bool LinsearchIndexReader::checkIfIndexFile(DBReader<unsigned int> *pReader) {
     if(version == NULL){
         return false;
     }
-    return (strncmp(version, PrefilteringIndexReader::CURRENT_VERSION, strlen(PrefilteringIndexReader::CURRENT_VERSION)) == 0 ) ? true : false;
+    return (strncmp(version, index_version_compatible, strlen(index_version_compatible)) == 0 ) ? true : false;
 }
 
 void LinsearchIndexReader::writeKmerIndexToDisk(std::string fileName, KmerPosition<short> *kmers, size_t kmerCnt){

src/linclust/kmerindexdb.cpp

@@ -14,6 +14,7 @@
 #endif
 
 extern const char* version;
+extern const char* index_version_compatible;
 
 int kmerindexdb(int argc, const char **argv, const Command &command) {
     MMseqsMPI::init(argc, argv);
@@ -169,7 +170,7 @@ int kmerindexdb(int argc, const char **argv, const Command &command) {
         dbw.open();
 
         Debug(Debug::INFO) << "Write VERSION (" << PrefilteringIndexReader::VERSION << ")\n";
-        dbw.writeData((char *) PrefilteringIndexReader::CURRENT_VERSION, strlen(PrefilteringIndexReader::CURRENT_VERSION) * sizeof(char), PrefilteringIndexReader::VERSION, 0);
+        dbw.writeData((char *) index_version_compatible, strlen(index_version_compatible) * sizeof(char), PrefilteringIndexReader::VERSION, 0);
         dbw.alignToPageSize();
 
         Debug(Debug::INFO) << "Write META (" << PrefilteringIndexReader::META << ")\n";

src/prefiltering/PrefilteringIndexReader.cpp

@@ -7,7 +7,6 @@
 #include "Parameters.h"
 
 extern const char* index_version_compatible;
-const char*  PrefilteringIndexReader::CURRENT_VERSION = index_version_compatible;
 unsigned int PrefilteringIndexReader::VERSION = 0;
 unsigned int PrefilteringIndexReader::META = 1;
 unsigned int PrefilteringIndexReader::SCOREMATRIXNAME = 2;
@@ -41,7 +40,7 @@ bool PrefilteringIndexReader::checkIfIndexFile(DBReader<unsigned int>* reader) {
     if(version == NULL){
         return false;
     }
-    return (strncmp(version, CURRENT_VERSION, strlen(CURRENT_VERSION)) == 0 ) ? true : false;
+    return (strncmp(version, index_version_compatible, strlen(index_version_compatible)) == 0 ) ? true : false;
 }
 
 std::string PrefilteringIndexReader::indexName(const std::string &outDB) {
@@ -67,7 +66,7 @@ void PrefilteringIndexReader::createIndexFile(const std::string &outDB,
     writer.open();
 
     Debug(Debug::INFO) << "Write VERSION (" << VERSION << ")\n";
-    writer.writeData((char *) CURRENT_VERSION, strlen(CURRENT_VERSION) * sizeof(char), VERSION, SPLIT_META);
+    writer.writeData((char *) index_version_compatible, strlen(index_version_compatible) * sizeof(char), VERSION, SPLIT_META);
     writer.alignToPageSize(SPLIT_META);
 
     Debug(Debug::INFO) << "Write META (" << META << ")\n";

src/prefiltering/PrefilteringIndexReader.h

@@ -24,7 +24,6 @@ struct PrefilteringIndexData {
 
 class PrefilteringIndexReader {
 public:
-    static const char*  CURRENT_VERSION;
     static unsigned int VERSION;
     static unsigned int ENTRIES;
     static unsigned int ENTRIESOFFSETS;