At least I got it to compile with g++ 10.2 and LLVM 10.

3rdparty/lexertl/parser/tokeniser/re_tokeniser_state.hpp

@@ -63,7 +63,7 @@ struct basic_re_tokeniser_state
         assign (rhs_);
     }
 
-    void assign (const basic_re_tokeniser_state &rhs_)
+    auto assign (const basic_re_tokeniser_state &rhs_)
     {
         _start = rhs_._start;
         _end = rhs_._end;

CMakeLists.txt

@@ -29,9 +29,13 @@ MESSAGE( STATUS "CMAKE_SYSTEM_PROCESSOR: " ${CMAKE_SYSTEM_PROCESSOR} )
 
 Find_Package(Boost REQUIRED)
 
-IF( Boost_VERSION LESS ${BOOST_MIN_VERSION} )
-  MESSAGE(FATAL_ERROR "Boost version ${Boost_VERSION} too old, please install ${BOOST_MIN_VERSION_TEXT} or greater!")
-ENDIF( Boost_VERSION LESS ${BOOST_MIN_VERSION} )
+#IF( Boost_VERSION LESS ${BOOST_MIN_VERSION} )
+#  MESSAGE(FATAL_ERROR "Boost version ${Boost_VERSION} too old, please install ${BOOST_MIN_VERSION_TEXT} or greater!")
+#ENDIF( Boost_VERSION LESS ${BOOST_MIN_VERSION} )
+
+set(NEEDED_Boost_VERSION 1.69.0)
+find_package(Boost ${NEEDED_Boost_VERSION} REQUIRED COMPONENTS mpi serialization system filesystem)
+set(Boost_LIBS ${Boost_LIBRARIES})
 
 Find_Package(LLVM REQUIRED)
 Find_Package(Sqlite3 REQUIRED)

corvus/pConfig.cpp

@@ -12,8 +12,6 @@
 
 #include <iostream>
 
-#include <llvm/ADT/OwningPtr.h>
-
 #if (LLVM_VERSION >= 3003000)
 #include <llvm/IR/Value.h> // isa
 #else
@@ -23,18 +21,19 @@
 #include <llvm/Support/SourceMgr.h>
 #include <llvm/Support/YAMLParser.h>
 #include <llvm/Support/MemoryBuffer.h>
-#include <llvm/Support/system_error.h>
 #include <llvm/ADT/APInt.h>
 
+#include <system_error>                 // for error_code
+
 namespace corvus { 
 
 bool pConfigMgr::read(const llvm::Twine &file, pConfig &c) {
 
     llvm::SmallString<128> path_storage;
     llvm::StringRef fName = file.toStringRef(path_storage);
 
-    llvm::OwningPtr<llvm::MemoryBuffer> contents;
-    if (llvm::MemoryBuffer::getFile(fName, contents)) {
+    std::unique_ptr<llvm::MemoryBuffer> contents;
+    if (llvm::MemoryBuffer::getFile(fName)) {
         return false;
     }
 

corvus/pParseContext.h

@@ -58,9 +58,9 @@ class pParseContext {
     void *allocate(size_t size, size_t align = 8) {
         return allocator_.Allocate(size, align);
     }
-    void deallocate(void* Ptr) {
+    void deallocate(void* Ptr, size_t Size = 4096) {
         // note this is a NOOP for bumpptr
-        allocator_.Deallocate(Ptr);
+        allocator_.Deallocate(Ptr, Size);
     }
 
     llvm::StringPool& idPool(void) { return idPool_; }

corvus/pParser.cpp

@@ -149,7 +149,7 @@ void parseSourceFile(pSourceModule* pMod, bool debug=false) {
                 countNewlines(context, match, lastNL);
                 break;
             }
-            case ~0: // npos
+            case std::numeric_limits<int>::max(): // npos
             {
                 // if state is HTML, collect characters for INLINE HTML token
                 if (match.state == 0) {

corvus/pSourceFile.cpp

@@ -12,16 +12,15 @@
 #include "corvus/pParseError.h"
 #include "corvus/pSourceLoc.h"
 
-#include <llvm/Support/system_error.h>
-
+#include <system_error>                 // for error_code
 
 namespace corvus { 
 
 pSourceFile::pSourceFile(pStringRef file):
     file_(file)
 {
 
-    if (llvm::MemoryBuffer::getFile(file, contents_)) {
+    if (llvm::MemoryBuffer::getFile(file)) {
         throw pParseError("couldn't open file [" + file_ + "]", pSourceLoc(file, 0, 0));
     }
 

corvus/pSourceFile.h

@@ -14,16 +14,18 @@
 #include "corvus/pTypes.h"
 
 #include <string>
-#include <llvm/ADT/OwningPtr.h>
+#include <llvm/Support/ErrorOr.h>
 #include <llvm/Support/MemoryBuffer.h>
 
+using llvm::MemoryBuffer;
+
 namespace corvus {
 
 class pSourceFile {
 
 private:
     std::string file_;
-    llvm::OwningPtr<llvm::MemoryBuffer> contents_;
+    std::unique_ptr<MemoryBuffer> contents_;
 
 public:
 
@@ -32,7 +34,7 @@ class pSourceFile {
     const std::string& fileName(void) const {
         return file_;
     }
-    const llvm::MemoryBuffer* contents(void) const { return contents_.get(); }
+    const MemoryBuffer* contents(void) const { return contents_.get(); }
 
 };
 

corvus/pSourceManager.cpp

@@ -25,15 +25,15 @@
 #include "corvus/passes/ModelChecker.h"
 #include "corvus/passes/TypeAnalysis.h"
 
-#include <llvm/Support/PathV2.h>
+#include <llvm/Support/Path.h>
 #include <llvm/Support/FileSystem.h>
-#include <llvm/Support/system_error.h>
 #include <llvm/ADT/SmallVector.h>
 
 #include <sqlite3.h>
 
 #include <stdlib.h>
 #include <assert.h>
+#include <system_error>                 // for error_code
 
 namespace corvus { 
 
@@ -219,7 +219,7 @@ void pSourceManager::addSourceDir(pStringRef name, pStringRef exts) {
     llvm::SmallVector<pStringRef, 8> extList;
     exts.split(extList, ",");
 
-    llvm::error_code ec;
+    std::error_code ec;
     for (llvm::sys::fs::recursive_directory_iterator dir(name, ec), dirEnd;
          dir != dirEnd && !ec; dir.increment(ec)) {
 
@@ -326,7 +326,7 @@ void pSourceManager::addIncludeDir(pStringRef name, pStringRef exts) {
     llvm::SmallVector<pStringRef, 8> extList;
     exts.split(extList, ",", 8);
 
-    llvm::error_code ec;
+    std::error_code ec;
     for (llvm::sys::fs::recursive_directory_iterator dir(name, ec), dirEnd;
          dir != dirEnd && !ec; dir.increment(ec)) {