add centos6 target

Makefile

@@ -181,7 +181,7 @@ clean:
 packages: amd64-packages arm64-packages
 .PHONY: packages
 
-amd64-packages: centos6.7 centos6.7-dbg centos7 centos7-dbg centos8 centos8-dbg ubuntu14 ubuntu14-dbg ubuntu16 ubuntu16-dbg ubuntu18 ubuntu18-dbg ubuntu20 ubuntu20-dbg debian8 debian8-dbg debian9 debian9-dbg debian10 debian10-dbg debian11 debian11-dbg fedora24 fedora24-dbg fedora27 fedora27-dbg fedora28 fedora28-dbg fedora33 fedora33-dbg fedora34 fedora34-dbg
+amd64-packages: centos6 centos6.7 centos6.7-dbg centos7 centos7-dbg centos8 centos8-dbg ubuntu14 ubuntu14-dbg ubuntu16 ubuntu16-dbg ubuntu18 ubuntu18-dbg ubuntu20 ubuntu20-dbg debian8 debian8-dbg debian9 debian9-dbg debian10 debian10-dbg debian11 debian11-dbg fedora24 fedora24-dbg fedora27 fedora27-dbg fedora28 fedora28-dbg fedora33 fedora33-dbg fedora34 fedora34-dbg
 .PHONY: amd64-packages
 
 arm64-packages: centos7-arm64 centos8-arm64 debian9-arm64 debian10-arm64 debian11-arm64 ubuntu18-arm64 ubuntu20-arm64 fedora32-arm64 fedora33-arm64
@@ -193,6 +193,9 @@ centos5: binaries/proxysql-${CURVER}-1-centos5.x86_64.rpm
 centos5-dbg: binaries/proxysql-${CURVER}-1-dbg-centos5.x86_64.rpm
 .PHONY: centos5-dbg
 
+centos6: binaries/proxysql-${CURVER}-1-centos6.x86_64.rpm
+.PHONY: centos6
+
 centos6.7: binaries/proxysql-${CURVER}-1-centos67.x86_64.rpm
 .PHONY: centos6.7
 
@@ -336,6 +339,10 @@ binaries/proxysql-${CURVER}-1-dbg-centos5.x86_64.rpm:
 	docker-compose up centos5_dbg_build
 	docker-compose rm -f
 
+binaries/proxysql-${CURVER}-1-centos6.x86_64.rpm:
+	docker-compose up centos6_build
+	docker-compose rm -f
+
 binaries/proxysql-${CURVER}-1-centos67.x86_64.rpm:
 	docker-compose up centos67_build
 	docker-compose rm -f

docker-compose.yml

@@ -1,5 +1,20 @@
 version: "2.0"
 services:
+  centos6_build:
+    image: proxysql/packaging:build-centos6
+    volumes:
+      - ./docker/images/proxysql/rhel-compliant/rpmmacros/:/root/
+      - ./docker/images/proxysql/rhel-compliant/rhel6/entrypoint/:/opt/entrypoint/
+      - ./:/opt/proxysql/
+    environment:
+      - APPLY_PATCH=rhel6
+      - MAKE
+      - MAKEOPT
+      - CURVER
+      - PKG_RELEASE=centos67
+      - PROXYSQL_BUILD_ARCH=x86_64
+    command:
+      - /opt/entrypoint/entrypoint.bash
   centos67_build:
     image: proxysql/packaging:build-centos6.7v2
     volumes: