chore: drop clang and llvm

Clang and llvm were required to build the legacy eBPF probe. Since
024c972 removed any support for
building it, remove also anything installing the corresponding
compilation toolchain.

Signed-off-by: Leonardo Di Giovanna <leonardodigiovanna1@gmail.com>

Author: ekoops

Example_configs.md

@@ -233,8 +233,7 @@ ARG rh_password
 
 RUN subscription-manager register --username $rh_username --password $rh_password --auto-attach
 
-RUN yum install gcc curl elfutils-libelf-devel kmod make \
-                llvm-toolset-0:12.0.1-1.module+el8.5.0+11871+08d0eab5.x86_64 cpio -y
+RUN yum install gcc curl elfutils-libelf-devel kmod make cpio -y
 ```
 
 ## redhat 9
@@ -257,7 +256,7 @@ and Dockerfile.rhel9:
 ```bash
 FROM docker.io/redhat/ubi9
 
-RUN yum install gcc elfutils-libelf-devel kmod make cpio llvm-toolset -y
+RUN yum install gcc elfutils-libelf-devel kmod make cpio -y
 RUN ln -s /usr/bin/$(uname -p)-redhat-linux-gcc-11 /usr/bin/gcc-11
 ```
 The `ln -s /usr/bin/$(uname -p)-redhat-linux-gcc-11 /usr/bin/gcc-11` command creates a symbolic link which makes sure driverkit finds the correct compiler binary.
@@ -276,7 +275,7 @@ ARG REDHAT_PASSWORD
 
 RUN subscription-manager register --username $REDHAT_USERNAME --password $REDHAT_PASSWORD --auto-attach
 
-RUN yum install gcc elfutils-libelf-devel kmod make cpio llvm-toolset -y
+RUN yum install gcc elfutils-libelf-devel kmod make cpio -y
 RUN ln -s /usr/bin/$(uname -p)-redhat-linux-gcc-11 /usr/bin/gcc-11
 ```
 

cmd/local.go

@@ -20,7 +20,7 @@ func NewLocalCmd(configOpts *ConfigOptions, rootOpts *RootOptions, rootFlags *pf
 	opts := localCmdOptions{}
 	localCmd := &cobra.Command{
 		Use:   "local",
-		Short: "Build Falco kernel modules in local env with local kernel sources and gcc/clang.",
+		Short: "Build Falco kernel modules in local env with local kernel sources and gcc.",
 		RunE: func(c *cobra.Command, args []string) error {
 			configOpts.Printer.Logger.Info("starting build",
 				configOpts.Printer.Logger.Args("processor", c.Name()))

cmd/testdata/templates/commands.txt

@@ -5,4 +5,4 @@ Available Commands:
   images                List builder images
   kubernetes            Build Falco kernel modules against a Kubernetes cluster.
   kubernetes-in-cluster Build Falco kernel modules against a Kubernetes cluster inside a Kubernetes cluster.
-  local                 Build Falco kernel modules in local env with local kernel sources and gcc/clang.
+  local                 Build Falco kernel modules in local env with local kernel sources and gcc.

docker/builders/builder-amazonlinux2-x86_64_gcc10.0.0.Dockerfile

@@ -6,8 +6,6 @@ LABEL maintainer="cncf-falco-dev@lists.cncf.io"
 ARG CMAKE_VERSION
 
 RUN yum -y install gcc10 \
-    clang \
-    llvm \
     bash-completion \
     bc \
     ca-certificates \

docker/builders/builder-any-x86_64_gcc10.0.0_gcc9.0.0.Dockerfile

@@ -12,8 +12,6 @@ RUN apt-get update \
 	&& apt-get install -y --no-install-recommends \
 	bash-completion \
 	bc \
-	clang \
-    llvm \
 	ca-certificates \
 	curl \
 	dkms \

docker/builders/builder-any-x86_64_gcc12.0.0_gcc11.0.0.Dockerfile

@@ -12,8 +12,6 @@ RUN apt-get update \
 	&& apt-get install -y --no-install-recommends \
 	bash-completion \
 	bc \
-	clang \
-    llvm \
 	ca-certificates \
 	curl \
 	dkms \

docker/builders/builder-any-x86_64_gcc13.0.0.Dockerfile

@@ -9,8 +9,6 @@ ARG CMAKE_VERSION
 RUN dnf install -y \
 	bash-completion \
 	bc \
-	clang \
-	llvm \
 	ca-certificates \
 	curl \
 	dkms \

docker/builders/builder-any-x86_64_gcc14.0.0.Dockerfile

@@ -9,8 +9,6 @@ ARG CMAKE_VERSION
 RUN dnf install -y \
 	bash-completion \
 	bc \
-	clang \
-	llvm \
 	ca-certificates \
 	curl \
 	dkms \

docker/builders/builder-any-x86_64_gcc8.0.0_gcc6.0.0_gcc5.0.0_gcc4.9.0_gcc4.8.0.Dockerfile

@@ -19,8 +19,6 @@ RUN apt-get update \
 	&& apt-get install -y --no-install-recommends \
 	bash-completion \
 	bc \
-	clang \
-    	llvm \
 	ca-certificates \
 	curl \
 	dkms \

docker/builders/builder-centos-x86_64_gcc4.8.5.Dockerfile

@@ -18,7 +18,6 @@ RUN sed -i s/mirror.centos.org/vault.centos.org/g /etc/yum.repos.d/*.repo; \
     sed -i s/^mirrorlist=http/#mirrorlist=https/g /etc/yum.repos.d/*.repo
 
 RUN yum -y install gcc \
-    llvm-toolset-7.0 \
 	bash-completion \
 	bc \
 	ca-certificates \
@@ -47,7 +46,3 @@ RUN curl -L -o /tmp/cmake.tar.gz https://github.com/Kitware/CMake/releases/downl
 
 # Properly create soft link
 RUN ln -s /usr/bin/gcc /usr/bin/gcc-4.8.5
-
-RUN source scl_source enable llvm-toolset-7.0
-RUN echo "source scl_source enable llvm-toolset-7.0" >> /etc/bashrc
-RUN source /etc/bashrc