From d78cbfeceb8cd78ed4d938547aedf40295f60a38 Mon Sep 17 00:00:00 2001
From: battlmonstr <battlmonstr@users.noreply.github.com>
Date: Wed, 6 Dec 2023 16:01:44 +0100
Subject: [PATCH] silkworm: disable on incompatible Linux versions (#8893)

Silkworm built on Ubuntu 22 depends on glibc 2.34. In order to run on an
older OS, Silkworm needs to be built and linked with an older glibc, but
to build on an older OS we need a compatible compiler. Silkworm requires
gcc 11+ that is not available on Ubuntu 20 or Debian 11.

To simplify the deployment disable Silkworm support on versions before
Ubuntu 22, Debian 12, and glibc prior to 2.34. The check for Ubuntu and
Debian is explicit, because some Ubuntu 16 installations report glibc
2.35 with ldd, but `go build` still uses an older system one and fails.
---
 Makefile                                |  5 ++
 turbo/silkworm/silkworm_compat_check.sh | 69 +++++++++++++++++++++++++
 2 files changed, 74 insertions(+)
 create mode 100755 turbo/silkworm/silkworm_compat_check.sh

diff --git a/Makefile b/Makefile
index 9f76c4ebf..9336f4b7c 100644
--- a/Makefile
+++ b/Makefile
@@ -35,6 +35,11 @@ endif
 
 # about netgo see: https://github.com/golang/go/issues/30310#issuecomment-471669125 and https://github.com/golang/go/issues/57757
 BUILD_TAGS = nosqlite,noboltdb
+
+ifneq ($(shell "$(CURDIR)/turbo/silkworm/silkworm_compat_check.sh"),)
+	BUILD_TAGS := "$(BUILD_TAGS),nosilkworm"
+endif
+
 PACKAGE = github.com/ledgerwatch/erigon
 
 GO_FLAGS += -trimpath -tags $(BUILD_TAGS) -buildvcs=false
diff --git a/turbo/silkworm/silkworm_compat_check.sh b/turbo/silkworm/silkworm_compat_check.sh
new file mode 100755
index 000000000..664d3f6db
--- /dev/null
+++ b/turbo/silkworm/silkworm_compat_check.sh
@@ -0,0 +1,69 @@
+#!/bin/bash
+
+set -e
+set -u
+set -o pipefail
+
+OS_RELEASE_PATH=/etc/os-release
+
+function glibc_version {
+    cmd="ldd --version"
+    $cmd | head -1 | awk '{ print $NF }'
+}
+
+function version_major {
+    IFS='.' read -a components <<< "$1"
+    echo "${components[0]}"
+}
+
+function version_minor {
+    IFS='.' read -a components <<< "$1"
+    echo "${components[1]}"
+}
+
+case $(uname -s) in
+	Linux)
+		if [[ ! -f "$OS_RELEASE_PATH" ]]
+		then
+			echo "not supported Linux without $OS_RELEASE_PATH"
+			exit 2
+		fi
+
+		source "$OS_RELEASE_PATH"
+
+        if [[ -n "$ID" ]] && [[ -n "$VERSION_ID" ]]
+        then
+            version=$(version_major "$VERSION_ID")
+            case "$ID" in
+                "debian")
+                    if (( version < 12 ))
+                    then
+                        echo "not supported Linux version: $ID $VERSION_ID"
+                        exit 3
+                    fi
+                    ;;
+                "ubuntu")
+                    if (( version < 22 ))
+                    then
+                        echo "not supported Linux version: $ID $VERSION_ID"
+                        exit 3
+                    fi
+                    ;;
+            esac
+        fi
+
+        version=$(version_minor "$(glibc_version)")
+        if (( version < 34 ))
+        then
+            echo "not supported glibc version: $version"
+            exit 4
+        fi
+
+		;;
+	Darwin)
+		;;
+	*)
+		echo "unsupported OS"
+		exit 1
+		;;
+esac