From b58bb33a845ef6a0917dc371188b6d2705170158 Mon Sep 17 00:00:00 2001
From: Josh Rogers <2706960+jrogers512@users.noreply.github.com>
Date: Sat, 13 Dec 2025 14:12:57 -0600
Subject: [PATCH 1/3] add CPU flag checks to install script

---
 README.md |  6 ++++++
 install   | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 56 insertions(+)

diff --git a/README.md b/README.md
index eb0295c9c..d0d65faad 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,12 @@
 
 ---
 
+### System Requirements
+
+**CPU Requirements:**
+
+- **x64 Linux**: CPU with SSE3 and SSSE3 instruction set support (approximately 2008 or newer)
+
 ### Installation
 
 ```bash
diff --git a/install b/install
index c6f209734..3fbbb5ed4 100755
--- a/install
+++ b/install
@@ -159,6 +159,56 @@ unbuffered_sed() {
     fi
 }
 
+# Check CPU capabilities before proceeding (Linux x64 only)
+if [ "$arch" = "x64" ] && [ "$os" = "linux" ]; then
+  cpu_check_failed=false
+  if [ -f /proc/cpuinfo ]; then
+    # Use compatible grep method (works on older systems)
+    cpu_flags_line=$(grep "^flags" /proc/cpuinfo | head -n 1 2>/dev/null || echo "")
+
+    if [ -n "$cpu_flags_line" ]; then
+      # Extract flags after colon (compatible method)
+      cpu_flags=$(echo "$cpu_flags_line" | cut -d: -f2- 2>/dev/null || echo "")
+
+      if [ -n "$cpu_flags" ]; then
+        # Locale-independent case conversion
+        cpu_flags=$(LC_ALL=C echo "$cpu_flags" | tr '[:upper:]' '[:lower:]')
+
+        # Check for required instruction sets
+        missing_flags=""
+        case "$cpu_flags" in
+          *sse3*) ;;
+          *) missing_flags=" sse3" ;;
+        esac
+        case "$cpu_flags" in
+          *ssse3*) ;;
+          *) missing_flags="$missing_flags ssse3" ;;
+        esac
+
+        if [ -n "$missing_flags" ]; then
+          print_message error "CPU not supported"
+          print_message error "Missing required instruction sets:$missing_flags"
+          exit 1
+        fi
+      else
+        print_message warning "Could not parse CPU flags from /proc/cpuinfo. Proceeding with installation..."
+        cpu_check_failed=true
+      fi
+    else
+      print_message warning "No CPU flags found in /proc/cpuinfo. Proceeding with installation..."
+      cpu_check_failed=true
+    fi
+  else
+    print_message warning "Could not read /proc/cpuinfo. Proceeding with installation..."
+    cpu_check_failed=true
+  fi
+
+  # Warning if we couldn't check CPU capabilities
+  if [ "$cpu_check_failed" = true ]; then
+    print_message warning "Note: This may result in compatibility issues on older CPUs"
+  fi
+fi
+
 print_progress() {
     local bytes="$1"
     local length="$2"

From d7546df51d4a7c53e104afec809d77606f9b6ad8 Mon Sep 17 00:00:00 2001
From: jrogers512 <jrogers512@users.noreply.github.com>
Date: Sat, 13 Dec 2025 14:19:04 -0600
Subject: [PATCH 2/3] cpu flag checks in install script

Found that opencode installs on an old system that does not have required cpu flags to run.  This patch adds a check in the install check to prevent installation just to find a `Illegal instruction` error message
---
 install | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/install b/install
index 3fbbb5ed4..4875cd0a7 100755
--- a/install
+++ b/install
@@ -163,18 +163,14 @@ unbuffered_sed() {
 if [ "$arch" = "x64" ] && [ "$os" = "linux" ]; then
   cpu_check_failed=false
   if [ -f /proc/cpuinfo ]; then
-    # Use compatible grep method (works on older systems)
     cpu_flags_line=$(grep "^flags" /proc/cpuinfo | head -n 1 2>/dev/null || echo "")
 
     if [ -n "$cpu_flags_line" ]; then
-      # Extract flags after colon (compatible method)
       cpu_flags=$(echo "$cpu_flags_line" | cut -d: -f2- 2>/dev/null || echo "")
 
       if [ -n "$cpu_flags" ]; then
-        # Locale-independent case conversion
         cpu_flags=$(LC_ALL=C echo "$cpu_flags" | tr '[:upper:]' '[:lower:]')
 
-        # Check for required instruction sets
         missing_flags=""
         case "$cpu_flags" in
           *sse3*) ;;
@@ -203,7 +199,6 @@ if [ "$arch" = "x64" ] && [ "$os" = "linux" ]; then
     cpu_check_failed=true
   fi
 
-  # Warning if we couldn't check CPU capabilities
   if [ "$cpu_check_failed" = true ]; then
     print_message warning "Note: This may result in compatibility issues on older CPUs"
   fi

From 331264445e1245dacf38f5af800c358947837469 Mon Sep 17 00:00:00 2001
From: jrogers512 <jrogers>
Date: Sun, 14 Dec 2025 13:22:43 -0600
Subject: [PATCH 3/3] SSE3 or SSSE3, not and.  #thanks Nindaleth

---
 README.md | 2 +-
 install   | 9 +++------
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index d0d65faad..9522e4da7 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@
 
 **CPU Requirements:**
 
-- **x64 Linux**: CPU with SSE3 and SSSE3 instruction set support (approximately 2008 or newer)
+- **x64 Linux**: CPU with SSE3 or SSSE3 instruction set support (approximately 2008 or newer)
 
 ### Installation
 
diff --git a/install b/install
index 4875cd0a7..827ebdb54 100755
--- a/install
+++ b/install
@@ -172,13 +172,10 @@ if [ "$arch" = "x64" ] && [ "$os" = "linux" ]; then
         cpu_flags=$(LC_ALL=C echo "$cpu_flags" | tr '[:upper:]' '[:lower:]')
 
         missing_flags=""
+        # Check for SSSE3 (includes SSE3) or SSE3
         case "$cpu_flags" in
-          *sse3*) ;;
-          *) missing_flags=" sse3" ;;
-        esac
-        case "$cpu_flags" in
-          *ssse3*) ;;
-          *) missing_flags="$missing_flags ssse3" ;;
+          *ssse3*|*sse3*) ;;
+          *) missing_flags=" sse3/ssse3" ;;
         esac
 
         if [ -n "$missing_flags" ]; then