From 97b1acbb27ca601435d64beaa3193b6625535761 Mon Sep 17 00:00:00 2001
From: Simon <simon@adlem.net>
Date: Sun, 2 Dec 2018 23:45:18 +0000
Subject: [PATCH 1/3] Add check for compiler verision as REGEX is not supported
 properly in GCC versions < 4.9

---
 Makefile  |  2 +-
 REGEX.cpp | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index c13b5da..9354612 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CC      = gcc
 CXX     = g++
-CFLAGS  = -g -O3 -Wall -std=c++0x -pthread
+CFLAGS  = -g -O3 -Wall -std=c++0x -pthread -lrt
 LIBS    = -lm -lpthread
 LDFLAGS = -g
 
diff --git a/REGEX.cpp b/REGEX.cpp
index 9653f27..498938a 100644
--- a/REGEX.cpp
+++ b/REGEX.cpp
@@ -24,6 +24,7 @@
 #include <cstdio>
 #include <cstring>
 
+
 CREGEX::CREGEX(const std::string& regexFile) :
 m_regexFile(regexFile),
 m_regex()
@@ -32,6 +33,13 @@ m_regex()
 
 bool CREGEX::load()
 {
+#if defined(__GNUC__) && (__GNUC__ <= 4) || (__GNUC__ == 4 && __GNUC_MINOR__ <= 9)
+	LogError("REGEX is not properly supported in GCC vesions below 4.9. Not loading REGEX");
+	return false;
+}
+#else
+
+	
 	FILE* fp = ::fopen(m_regexFile.c_str(), "rt");
 	if (fp != NULL) {
 		char buffer[100U];
@@ -68,6 +76,8 @@ bool CREGEX::load()
 	return true;
 }
 
+#endif
+
 std::vector<std::regex>  CREGEX::get()
 {
 	return(m_regex);

From 8186eff3df91c5600784ed76cde053ca65eefd3e Mon Sep 17 00:00:00 2001
From: Simon <simon@adlem.net>
Date: Mon, 3 Dec 2018 09:58:17 +0000
Subject: [PATCH 2/3] Add comment in code to explain why we exclude REGEX for
 old GCC versions

---
 REGEX.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/REGEX.cpp b/REGEX.cpp
index 498938a..b10168f 100644
--- a/REGEX.cpp
+++ b/REGEX.cpp
@@ -32,6 +32,11 @@ m_regex()
 }
 
 bool CREGEX::load()
+/* Older versions of GCC appear to support REGEX but silently fail to match. Even
+ * though the headers exist and the code compiles and runs cleanly. The below #if block 
+ * stops the REGEXs being loaded in these cases, effectively disabling REGEX functionality. 
+ * The loading code is replaced with a log entry to show the user this has happened.
+*/
 {
 #if defined(__GNUC__) && (__GNUC__ <= 4) || (__GNUC__ == 4 && __GNUC_MINOR__ <= 9)
 	LogError("REGEX is not properly supported in GCC vesions below 4.9. Not loading REGEX");

From 2d499d90c168d8de6326917fd06dc7c5f521cc62 Mon Sep 17 00:00:00 2001
From: Simon <simon@adlem.net>
Date: Mon, 3 Dec 2018 11:26:40 +0000
Subject: [PATCH 3/3] Remove -lrt from makefile

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 9354612..c13b5da 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CC      = gcc
 CXX     = g++
-CFLAGS  = -g -O3 -Wall -std=c++0x -pthread -lrt
+CFLAGS  = -g -O3 -Wall -std=c++0x -pthread
 LIBS    = -lm -lpthread
 LDFLAGS = -g