fixed Debian 12 build

Author: orignal

Makefile.linux

@@ -15,6 +15,9 @@ ifeq ($(shell expr match $(CXX) 'clang'),5)
 	NEEDED_CXXFLAGS += -std=c++20
 else ifeq ($(shell expr match ${CXXVER} "10"),2) # gcc 10
 	NEEDED_CXXFLAGS += -std=c++17
+else ifeq ($(shell expr match ${CXXVER} "12"),2) # gcc 12
+# for Debian 12 with boost 1.74
+	NEEDED_CXXFLAGS += -std=c++17
 else ifeq ($(shell expr match ${CXXVER} "1[1-9]"),2) # gcc 11+
 	NEEDED_CXXFLAGS += -std=c++20
 else # not supported