Make llvm-config build more general for linux

Makefile

@@ -30,25 +30,29 @@ ifeq ($(OS), Darwin)
     ifeq ($(shell $(LLVM_CONFIG) --version | grep -E $(LLVM_VERSION_PATTERN)),)
         ifeq ($(ARCH), arm64)
             $(error "Requirement: llvm-config must be base version 13 for arm64")
-        else 
+        else
             $(error "Requirement: llvm-config must be base version greater than 11 for amd64/x86")
-        endif 
-    endif 
+        endif
+    endif
 
     LDFLAGS:=$(LDFLAGS) -liconv -ldl
     CFLAGS:=$(CFLAGS) $(shell $(LLVM_CONFIG) --cxxflags --ldflags)
     LDFLAGS:=$(LDFLAGS) -lLLVM-C
 endif
 ifeq ($(OS), Linux)
-    LLVM_CONFIG=llvm-config-11
-    ifneq ($(shell which llvm-config-11 2>/dev/null),)
-        LLVM_CONFIG=llvm-config-11
-    else ifneq ($(shell which llvm-config-11-64 2>/dev/null),)
-        LLVM_CONFIG=llvm-config-11-64
-    else
-        ifeq ($(shell $(LLVM_CONFIG) --version | grep '^11\.'),)
-            $(error "Requirement: llvm-config must be version 11")
-        endif
+    LLVM_CONFIG=llvm-config
+
+	LLVM_VERSIONS = "13.%.%" "12.0.1" "11.1.0"
+
+    LLVM_VERSION_PATTERN_SEPERATOR = )|(
+    LLVM_VERSION_PATTERNS_ESCAPED_DOT = $(subst .,\.,$(LLVM_VERSIONS))
+    LLVM_VERSION_PATTERNS_REPLACE_PERCENT = $(subst %,.*,$(LLVM_VERSION_PATTERNS_ESCAPED_DOT))
+    LLVM_VERSION_PATTERN_REMOVE_ELEMENTS = $(subst " ",$(LLVM_VERSION_PATTERN_SEPERATOR),$(LLVM_VERSION_PATTERNS_REPLACE_PERCENT))
+    LLMV_VERSION_PATTERN_REMOVE_SINGLE_STR = $(subst ",,$(LLVM_VERSION_PATTERN_REMOVE_ELEMENTS))
+    LLVM_VERSION_PATTERN = "^(($(LLMV_VERSION_PATTERN_REMOVE_SINGLE_STR)))"
+
+    ifeq ($(shell $(LLVM_CONFIG) --version | grep -E $(LLVM_VERSION_PATTERN)),)
+		$(error "Requirement: llvm-config must be base version greater than 11")
     endif
 
     LDFLAGS:=$(LDFLAGS) -ldl