Update ucrt test for new file output

After a recent file update, the output is now:

> a.exe: PE32+ executable for MS Windows 5.02 (console), x86-64, 18 sections

Adjust the grep to match both the old and new output. I think the
key parts are that it's a "PE32+ executable" for x86-64.

.pre-commit-config.yaml

@@ -12,3 +12,10 @@ repos:
   rev: 1.32.2
   hooks:
   - id: tmt-lint
+
+- repo: https://github.com/koalaman/shellcheck-precommit
+  rev: v0.10.0
+  hooks:
+  - id: shellcheck
+    require_serial: true # Podman has trouble running concurrently
+    args: ["--exclude=SC1091"] # Ignore "Not following" sourced scripts

tests/fedora-flags/runtest.sh

@@ -1,10 +1,11 @@
 #!/bin/bash
+# shellcheck disable=SC2086
 
 set -ex pipefail
 
-cflags=`rpm -D '%toolchain clang' -E %{build_cflags}`
+cflags=$(rpm -D '%toolchain clang' -E '%{build_cflags}')
-cxxflags=`rpm -D '%toolchain clang' -E %{build_cxxflags}`
+cxxflags=$(rpm -D '%toolchain clang' -E '%{build_cxxflags}')
-ldflags=`rpm -D '%toolchain clang' -E %{build_ldflags}`
+ldflags=$(rpm -D '%toolchain clang' -E '%{build_ldflags}')
 
 
 # Test a c program

tests/gcc-clang-compatibility/runtest.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -eux
+#!/bin/bash -eux
 
 tmp=$(mktemp -d)
 
@@ -6,7 +6,7 @@ tmp=$(mktemp -d)
 # gcc-toolset-XX, in such case we need to test the compatibility with that one.
 # We can get that from `clang -v` output.
 TOOLSET=$(clang -v |& grep "Selected GCC installation" | grep -P -o '(dev|gcc-)toolset-[0-9]*') ||:
-if [[ "x" = "x${TOOLSET}" ]]; then
+if [[ "" = "${TOOLSET}" ]]; then
     GCC="g++"
 else
     GCC="scl enable ${TOOLSET} -- g++"
@@ -14,13 +14,13 @@ else
 fi
 
 # Build the source with GCC, link it with clang
-${GCC} -c hello.cpp -o ${tmp}/hello.o
+${GCC} -c hello.cpp -o "${tmp}/hello.o"
-clang++ -o ${tmp}/hello ${tmp}/hello.o
+clang++ -o "${tmp}"/hello "${tmp}/hello.o"
-${tmp}/hello | grep "Hello world"
+"${tmp}/hello" | grep "Hello world"
-rm -rf ${tmp}/*
+rm -rf "${tmp:?}"/*
 
 # Build the source with clang, link it with GCC
-clang++ -c hello.cpp -o ${tmp}/hello.o
+clang++ -c hello.cpp -o "${tmp}/hello.o"
-${GCC} -o ${tmp}/hello ${tmp}/hello.o
+${GCC} -o "${tmp}"/hello "${tmp}/hello.o"
-${tmp}/hello | grep "Hello world"
+"${tmp}/hello" | grep "Hello world"
-rm -rf ${tmp}/*
+rm -rf "${tmp:?}"/*

tests/kernel-ark-build/runtest.sh

@@ -2,11 +2,17 @@
 # vim: dict+=/usr/share/beakerlib/dictionary.vim cpt=.,w,b,u,t,i,k
 . /usr/share/beakerlib/beakerlib.sh || exit 1
 
-## General configuration variables. Can be overriden via environment
+## General configuration variables. Can be overridden via environment
 # Kernel branch to build. Typically ark-latest or os-build.
 KERNEL_BRANCH=${KERNEL_BRANCH:-"ark-latest"}
 KERNEL_GIT_URL=${KERNEL_GIT_URL:-"https://gitlab.com/cki-project/kernel-ark.git"}
 
+## Helper variables to handle cached/generated SRPM
+CACHE_DIR_BASE="/var/tmp/kernel-"
+KERNEL_SRPM_PATTERN="kernel-*.src.rpm"
+# Path to the kernel SRPM to build.
+KERNEL_SRPM=""
+
 # Environment variables to configure the kernel build:
 #   * ENABLE_LTO: If set, it will build kernel-ark with clang_lto.
 #   * ENABLE_DEBUG: If set, it will build kernel-ark in debug mode.
@@ -16,8 +22,8 @@ CLANG_MODE=${CLANG_MODE:-"--with clang"}
 BUILD_MODE=${ENABLE_DEBUG:+"--with debug --without base"}
 BUILD_MODE=${BUILD_MODE:-"--with base --without debug"}
 
-function logTmtRequiredPackages(){
+# Log installed packages required by TMT
-    # Get the expected packages from TMT metadata requires
+logTmtRequiredPackages() {
     if [[ ! -e $TMT_TEST_METADATA ]]; then
         rlLogWarning "${FUNCNAME[0]}: No TMT_TEST_METADATA file found. Run the test from tmt"
         return
@@ -26,19 +32,123 @@ function logTmtRequiredPackages(){
     rlLog "# Installed packages:"
     rlLog "#----------------------------#"
     for pkg in $TMT_REQUIRES; do
-        rlAssertRpm $pkg
+        rlAssertRpm "$pkg"
-    done;
+    done
     rlLog "#----------------------------#"
+}
 
+# Check if a previous test run created a kernel SRPM for the latest commit
+# If found, the abspath is stored in KERNEL_SRPM global variable
+# Returns 0 if srpm found, 1 otherwise.
+checkCache() {
+    local commit_hash
+    local cache_dir
+    local cached_srpm
+
+    commit_hash=$(git ls-remote "${KERNEL_GIT_URL}" "${KERNEL_BRANCH}" | awk '{print $1}')
+    rlLog "Latest commit for ${KERNEL_BRANCH} branch: $commit_hash"
+
+    cache_dir="${CACHE_DIR_BASE}${commit_hash}/"
+    if [[ -d "$cache_dir" ]]; then
+        cached_srpm=$(find "$cache_dir" -name "${KERNEL_SRPM_PATTERN}")
+        if [[ -n "$cached_srpm" ]]; then
+            rlLog "Found cached SRPM: $cached_srpm"
+            rlRun "dnf builddep -y $cached_srpm > install-buildreqs.log 2>&1"
+            rlFileSubmit install-buildreqs.log
+            KERNEL_SRPM="$cached_srpm"
+            return 0
+        fi
+    fi
+    rlLog "Cached kernel SRPM not found"
+    return 1
+}
+
+# Attempts to clone the kernel-ark tree in the CWD, at most 3 times.
+# Returns 0 on success, 1 otherwise
+cloneKernelTree() {
+    local retries=3
+    local delay=10
+
+    rlLog "Cloning kernel"
+    while [[ $retries -gt 0 ]]; do
+        rlRun "git clone -q --branch ${KERNEL_BRANCH} ${KERNEL_GIT_URL}" 0-255
+        retcode=$?
+        if [[ $retcode -eq 0 ]]; then
+            return 0
+        else
+            retries=$((retries - 1))
+            rlLog "Clone failed, wait ${delay}s and retry ($retries retries left)"
+            sleep $delay
+        fi
+    done
+    return "$retcode"
+}
+
+# In a kernel-ark repository, do all the operations needed to generate an SRPM
+# If the kernel is generated return the abspath in KERNEL_SRPM global variable
+# Returns 0 on success, 1 otherwise
+generateSRPM() {
+    local generated_srpm
+    local commit_hash
+    local cache_dir
+
+    if ! cloneKernelTree; then
+        rlFail "Failed to clone kernel tree"
+        return 1
+    fi
+
+    rlRun "pushd kernel-ark"
+    rlLog "Gathering and installing missing build requirements"
+    rlRun "make dist-get-buildreqs > make-buildreqs.log 2>&1"
+    rlFileSubmit make-buildreqs.log
+    if grep -q 'Missing dependencies:' make-buildreqs.log; then
+        # Getting the build requirements is quite tricky as it might contain
+        # not only package names but also "provides" perl(ExtUtils::Embed) which
+        # can break the dnf command if not escaped properly. The safest way is
+        # to create an array which contains each req as argument, then pass the
+        # array to dnf. Bash will later pass each element properly quoted.
+        # rlRun can also easily break the command due to special characters
+        # so we don't use it here.
+        read -ra KERNEL_BUILDREQS <<< "$(sed -n 's/Missing dependencies://p' make-buildreqs.log)"
+        rlLog "Installing dependencies: ${KERNEL_BUILDREQS[*]}"
+        dnf install -y "${KERNEL_BUILDREQS[@]}" > install-buildreqs.log 2>&1 || \
+            rlFail "$(cat install-buildreqs.log)"
+        rlFileSubmit install-buildreqs.log
+    elif grep 'PASS:' make-buildreqs.log; then
+        rlLog "All dependencies were already installed"
+    else
+        rlLogWarning "Error getting dependencies, the build might fail"
+        rlRun "cat make-buildreqs.log"
+    fi
+
+    rlLog "Generating SRPM"
+    rlRun "make dist-srpm > dist-srpm.log 2>&1"
+    rlFileSubmit dist-srpm.log
+
+    generated_srpm=$(find "$(pwd)" -name "$KERNEL_SRPM_PATTERN")
+    if [[ -e "$generated_srpm" ]]; then
+        rlLog "Caching generated SRPM"
+        commit_hash=$(git rev-parse HEAD)
+        cache_dir="${CACHE_DIR_BASE}${commit_hash}/"
+        rlRun "mkdir -p $cache_dir"
+        rlRun "cp $generated_srpm $cache_dir"
+        KERNEL_SRPM="$generated_srpm"
+        rlRun "popd"
+        return 0
+    else
+        rlLogWarning "Failed to generate SRPM"
+        rlRun "popd"
+        return 1
+    fi
 }
 
 rlJournalStart
     rlPhaseStartSetup
-        # Log system mem/cpus and packages installed by tmt
         rlRun "nproc"
         rlRun "free -h"
         logTmtRequiredPackages
 
+        declare tmp
         rlRun "tmp=\$(mktemp -d)" 0 "Create tmp directory"
         rlRun "pushd $tmp"
         rlRun "set -o pipefail"
@@ -49,42 +159,28 @@ rlJournalStart
     rlPhaseEnd
 
     rlPhaseStartTest
-        # TODO It would be fantastic to find out a way to shallow clone without
+        # Check if kernel package was generated by a previous test run
-        # breaking the dist-get-buildreqs and dist-srpm make targets, because
+        # and generate a new one if it wasn't
-        # a complete clone takes about 5GiB and a LOT of time...
+        checkCache
-        rlLog "Cloning kernel"
+        if [[ -e "$KERNEL_SRPM" ]]; then
-        rlRun "git clone --branch ${KERNEL_BRANCH} ${KERNEL_GIT_URL}"
+            rlLog "Using cached kernel SRPM: $KERNEL_SRPM"
-        rlRun 'cd kernel-ark'
-
-        rlLog "Gathering and installing missing build requirements"
-        rlRun "make dist-get-buildreqs > make-buildreqs.log"
-        rlFileSubmit make-buildreqs.log
-        if grep 'Missing dependencies:' make-buildreqs.log; then
-            rlRun "KERNEL_BUILDREQS=\"$(sed -n 's/Missing dependencies://p' make-buildreqs.log)\""
-            rlRun 'dnf install -y ${KERNEL_BUILDREQS} > install-buildreqs.log 2>&1'
-            rlFileSubmit install-buildreqs.log
-        elif grep 'PASS:' make-buildreqs.log; then
-            rlLog "All dependencies were already installed"
         else
-            rlLogWarning "Error getting dependencies, the build might fail"
+            rlLog "No kernel SRPM found, generating new SRPM"
-            rlRun "cat make-buildreqs.log"
+            generateSRPM
         fi
 
-        rlLog "Generating srpm"
+        if [[ -e "$KERNEL_SRPM" ]]; then
-        rlRun 'make dist-srpm  > dist-srpm.log 2>&1'
+            BUILD_FLAGS="--target $(uname -m) --with up --with toolchain_clang "
-        rlRun 'KERNEL_SRPM=$(find . -name kernel-*.src.rpm)'
+            BUILD_FLAGS+="--without trace --without arm64_16k --without arm64_64k "
-        rlFileSubmit dist-srpm.log
+            BUILD_FLAGS+="--without realtime --without zfcpdump "
-
+            BUILD_FLAGS+="${CLANG_MODE} ${BUILD_MODE}"
-        # Prepare the flags to be passed to rpmbuild depending on the configuration
-        BUILD_FLAGS="--target $(uname -m) --with up --with toolchain_clang "
-        BUILD_FLAGS+="--without trace --without arm64_16k --without arm64_64k "
-        BUILD_FLAGS+="--without realtime --without zfcpdump "
-        BUILD_FLAGS+="${CLANG_MODE} ${BUILD_MODE}"
-
-        rlLog "Building kernel (branch $KERNEL_BRANCH)"
-        rlRun "rpmbuild ${BUILD_FLAGS} --rebuild ${KERNEL_SRPM} > build.log 2>&1"
-        rlFileSubmit build.log
 
+            rlLog "Building kernel (branch $KERNEL_BRANCH)"
+            rlRun "rpmbuild ${BUILD_FLAGS} --rebuild ${KERNEL_SRPM} > build.log 2>&1"
+            rlFileSubmit build.log
+        else
+            rlFail "Kernel SRPM not found, finishing test"
+        fi
     rlPhaseEnd
 
     rlPhaseStartCleanup

tests/libomp/runtest.sh

@@ -2,23 +2,23 @@
 
 set -exo pipefail
 
-CLANG_PKG=$(rpm -qf --queryformat '%{name}' $(readlink -f $(type -p clang)))
+CLANG_PKG=$(rpm -qf --queryformat '%{name}' "$(readlink -f "$(type -p clang)")")
 
 # For compat packages, we want to check if there's a package suffix: clang17 instead clang for example
 PKG_SUFFIX=${CLANG_PKG#clang}
-CLANG_NVR=$(rpm -q $CLANG_PKG)
+CLANG_NVR=$(rpm -q "$CLANG_PKG")
-CLANG_VERSION=$(rpm --queryformat="%{version}" -q $CLANG_NVR)
+CLANG_VERSION=$(rpm --queryformat="%{version}" -q "$CLANG_NVR")
 LIBOMP_DEPENDENCIES="libomp${PKG_SUFFIX} libomp${PKG_SUFFIX}-devel"
 
 # Ensure clang depends on the correct clang-libs version
-rpm -q --requires ${CLANG_NVR} | grep "${CLANG_PKG}-libs.* = ${CLANG_VERSION}"
+rpm -q --requires "$CLANG_NVR" | grep "${CLANG_PKG}-libs.* = ${CLANG_VERSION}"
 
 # Check that weak dependencies are correct. The versions of these should be the same
 # as clang's to guarantee the ABI compatibility, and that version should be actually
 # installed as well.
 for lomp_dep in $LIBOMP_DEPENDENCIES; do
-    rpm -q --recommends clang${PKG_SUFFIX}-libs | grep "${lomp_dep}.* = ${CLANG_VERSION}"
+    rpm -q --recommends "clang${PKG_SUFFIX}-libs" | grep "${lomp_dep}.* = ${CLANG_VERSION}"
-    [[ "$(rpm --queryformat="%{version}" -q ${lomp_dep}.$(uname -m))" == "${CLANG_VERSION}" ]]
+    [[ "$(rpm --queryformat="%{version}" -q "${lomp_dep}"."$(uname -m)")" == "${CLANG_VERSION}" ]]
 done
 
 # Perform a sanity test to ensure everything works as expected

tests/llvm-test-suite/main.fmf

@@ -8,6 +8,10 @@ adjust+:
       or distro == centos
     enabled: false
 
+  - because: "llvm test suite not built for compat packages"
+    enabled: false
+    when: compat is defined
+
 require+:
   - git
   - clang

tests/long-double/runtest.sh

@@ -1,4 +1,4 @@
-set -e
+#!/bin/bash -e
 
 # Use __LDBL_MANT_DIG__ as a way to distinguish between long double formats.
 # While this is not guaranteed to change for all formats, it provides a

tests/pie-rpm/main.fmf

@@ -6,10 +6,6 @@ require+:
   - rpm-build
   - glibc-static
 
-# TODO: Untag this test when redhat-rpm-config is modified.
-# See: https://src.fedoraproject.org/rpms/redhat-rpm-config/pull-request/291
-tag: not-in-default
-
 adjust+:
   - enabled: false
     when: distro != fedora or distro < fedora-40

tests/ppc64le-long-double/runtest-fedora.sh

@@ -1,8 +1,7 @@
-set -e
+#!/bin/bash -e
 
-fedora_release=`rpm -E %{fedora}`
+fedora_release=$(rpm -E "%{fedora}")
 mock_root=fedora-$fedora_release-ppc64le
-triple=ppc64le-redhat-linux
 
 mock_cmd="mock -r $mock_root --isolation=simple"
 
@@ -12,10 +11,10 @@ run_test () {
 
     echo "Running $test_name"
     echo "Expected output: $expected"
-    actual=$($mock_cmd -q --shell ./$test_name)
+    actual=$($mock_cmd -q --shell "./$test_name")
     echo "Actual output:   $actual"
 
-    if [[ x$expected == x$actual ]]; then
+    if [[ "$expected" == "$actual" ]]; then
         return 0;
     else
         return 1;

tests/ppc64le-long-double/runtest.sh

@@ -1,7 +1,4 @@
-set -e
+#!/bin/bash -e
-
-triple=ppc64le-redhat-linux
-
 
 run_test () {
     test_name=$1
@@ -9,10 +6,10 @@ run_test () {
 
     echo "Running $test_name"
     echo "Expected output: $expected"
-    actual=$(./$test_name)
+    actual=$("./$test_name")
     echo "Actual output:   $actual"
 
-    if [[ x$expected == x$actual ]]; then
+    if [[ "$expected" == "$actual" ]]; then
         return 0;
     else
         return 1;

tests/rhbz_1647130/runtest.sh

@@ -1,9 +1,8 @@
-#!/bin/sh
+#!/bin/bash -ex
-set -e
-set -x
 
-tmp_cpp=`mktemp -t XXXXX.cpp`
+tmp_cpp=$(mktemp -t XXXXX.cpp)
-tmp_dir=`mktemp -d`
+tmp_dir=$(mktemp -d)
-echo 'int main(int argc, char*argv[]) { while(argc--) new int(); return 0; }' > $tmp_cpp
+echo 'int main(int argc, char*argv[]) { while(argc--) new int(); return 0; }' > "$tmp_cpp"
-scan-build -o $tmp_dir clang++ -c $tmp_cpp -o /dev/null
+scan-build -o "$tmp_dir" clang++ -c "$tmp_cpp" -o /dev/null
-(scan-view --no-browser $tmp_dir/* & WPID=$! && sleep 10s && kill $WPID)
+(scan-view --no-browser "$tmp_dir"/* & WPID=$! && sleep 10s && kill $WPID)
+rm -rf "$tmp_cpp" "$tmp_dir"

tests/rpmmacros/main.fmf

@@ -4,3 +4,12 @@ require+:
   - clang-devel
 extra-summary: /tools/clang/rpmmacros
 extra-task: /tools/clang/rpmmacros
+
+adjust+:
+  # From spec file:
+  # File in the macros file for other packages to use.  We are not doing this
+  # in the compat package, because the version macros would conflict with
+  # eachother if both clang and the clang compat package were installed together.
+  - because: "macros.clang is not added to compat packages"
+    enabled: false
+    when: compat is defined

tests/rpmmacros/runtest.sh

@@ -1,11 +1,11 @@
-#!/bin/sh -eux
+#!/bin/bash -eux
 
-clang_pkg=${1:-"$(rpm -qf --queryformat '%{name}' $(readlink -f $(type -p clang)))"}
+clang_pkg=${1:-"$(rpm -qf --queryformat '%{name}' "$(readlink -f "$(type -p clang)")")"}
 macros_path="/usr/lib/rpm/macros.d/macros.clang"
 
 set pipefail
 
-if ! rpm -q $clang_pkg > /dev/null; then
+if ! rpm -q "$clang_pkg" > /dev/null; then
     echo "Could not find package $clang_pkg"
     exit 1
 fi
@@ -23,7 +23,7 @@ echo
 # suffix ~rcN.  Meanwhile, the macro won't include it in order to allow packages
 # built with an RC package to be fully supported later.
 # In that case, we need to remove that prefix.
-rpm_version=$(rpm -q $clang_pkg --qf "%{version}" | sed 's/~.*//')
+rpm_version=$(rpm -q "$clang_pkg" --qf "%{version}" | sed 's/~.*//')
 macro_version=$(rpm --eval "%{clang_version}")
 
 if [[ "$rpm_version" != "$macro_version" ]]; then

tests/toolchains/runtest.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -eux
+#!/bin/bash -eu
 
 set pipefail
 
@@ -12,41 +12,40 @@ status=0
 
 test_toolchain() {
 
-    toolchain=$@
+    toolchain=("$@")
     args=""
 
-    while [ $# -gt 0 ]; do
+    for arg in "${toolchain[@]}"; do
-        case $1 in
+        case "$arg" in
             clang)
-                compiler=$1
+                compiler=$arg
                 src=hello.c
                 ;;
             clang++)
-                compiler=$1
+                compiler=$arg
                 src=hello.cpp
                 ;;
             compiler-rt)
-                args="$args -rtlib=$1"
+                args="$args -rtlib=$arg"
                 ;;
             libc++)
-                args="$args -stdlib=$1"
+                args="$args -stdlib=$arg"
                 ;;
             libstdc++)
-                args="$args -stdlib=$1"
+                args="$args -stdlib=$arg"
                 ;;
             lld)
-                args="$args -fuse-ld=$1"
+                args="$args -fuse-ld=$arg"
                 ;;
             *)
-                args="$args $1"
+                args="$args $arg"
                 ;;
         esac
-    shift
     done
 
     cmd="$compiler $args $src"
     rm -f a.out
-    echo "* $toolchain"
+    echo "* ${toolchain[*]}"
     echo "  command: $cmd"
     if $cmd && ./a.out | grep -q 'Hello World'; then
         echo "  PASS"
@@ -57,17 +56,17 @@ test_toolchain() {
 }
 
 clang --version
-CLANG_PKG=$(rpm -qf --queryformat '%{name}' $(readlink -f $(type -p clang)))
+CLANG_PKG=$(rpm -qf --queryformat '%{name}' "$(readlink -f "$(type -p clang)")")
 # Repoquery is needed instead yum info for compatibility with RHEL-7
-repoquery -i --installed $CLANG_PKG | grep ^Source
+repoquery -i --installed "$CLANG_PKG" | grep ^Source
-clang_version=$(rpm -q --queryformat "%{version}" $CLANG_PKG | grep -ioP "^[0-9]+")
+clang_version=$(rpm -q --queryformat "%{version}" "$CLANG_PKG" | grep -ioP "^[0-9]+")
 echo ""
 
 for compiler in clang clang++; do
     for rtlib in "" compiler-rt; do
         for linker in "" lld; do
             for cxxlib in "" $CXXLIBS; do
-                if [ "$compiler" = "clang" -a -n "$cxxlib" ]; then
+                if [[ "$compiler" = "clang" && -n "$cxxlib" ]]; then
                     continue
                 fi
                 for args in "" -static; do
@@ -100,7 +99,7 @@ for compiler in clang clang++; do
                       continue
                     fi
 
-                    test_toolchain $compiler $rtlib $linker $cxxlib $args
+                    test_toolchain "$compiler" "$rtlib" "$linker" "$cxxlib" "$args"
                 done
             done
         done

tests/ucrt64-toolchain/runtest.sh

@@ -1,4 +1,4 @@
-set -eux
+#!/bin/bash -eux
 
 clang++ --target=x86_64-windows-gnu test.cpp
-file a.exe | grep "PE32+ executable (console) x86-64, for MS Windows"
+file a.exe | grep "PE32+ executable.*x86-64"

tests/use-correct-dwarf-default/runtest.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -eux
+#!/bin/bash -eux
 
 # Determine correct DWARF version to use. Defaults to version 5, but older
 # distros might need to use version 4, which can be configured using the
@@ -6,9 +6,9 @@
 required_dwarf_version=${DWARF_VERSION:-5}
 
 # Get clang version
-CLANG_PKG=$(rpm -qf --queryformat '%{name}' $(readlink -f $(type -p clang)))
+CLANG_PKG=$(rpm -qf --queryformat '%{name}' "$(readlink -f "$(type -p clang)")")
-clang_version=$(rpm -q --queryformat "%{version}" $CLANG_PKG | grep -ioP "^[0-9]+")
+clang_version=$(rpm -q --queryformat "%{version}" "$CLANG_PKG" | grep -ioP "^[0-9]+")
-if  [ $clang_version -lt 18 ]; then
+if  [ "$clang_version" -lt 18 ]; then
     >&2 echo "clang is older than version 18";
     required_dwarf_version=4
 fi