diff --git a/xtool/cppkg/conan.go b/xtool/cppkg/conan.go
index 1d022720..7a747059 100644
--- a/xtool/cppkg/conan.go
+++ b/xtool/cppkg/conan.go
@@ -18,6 +18,7 @@ package cppkg
 
 import (
 	"crypto/md5"
+	"encoding/base64"
 	"encoding/hex"
 	"errors"
 	"fmt"
@@ -30,6 +31,7 @@ import (
 
 	"github.com/goccy/go-yaml"
 	"github.com/goplus/llgo/internal/github"
+	"github.com/qiniu/x/byteutil"
 	"github.com/qiniu/x/httputil"
 )
 
@@ -98,9 +100,9 @@ func getRelease(pkg *Package, tagPattern string) (ret *githubRelease, err error)
 }
 
 // Install installs the specified package using Conan.
-func (p *Manager) Install(pkg *Package, flags int) (err error) {
-	outDir := p.outDir(pkg)
-	os.MkdirAll(outDir, os.ModePerm)
+func (p *Manager) Install(pkg *Package, options []string, flags int) (buildDir string, err error) {
+	buildDir = p.BuildDir(pkg, options)
+	os.MkdirAll(buildDir, os.ModePerm)
 
 	var rev string
 	var gr *githubRelease
@@ -115,17 +117,17 @@ func (p *Manager) Install(pkg *Package, flags int) (err error) {
 			return
 		}
 
-		err = copyDirR(conanfileDir, outDir)
+		err = copyDirR(conanfileDir, buildDir)
 		if err != nil {
 			return
 		}
 
-		conanfilePy, err = os.ReadFile(outDir + "/conanfile.py")
+		conanfilePy, err = os.ReadFile(buildDir + "/conanfile.py")
 		if err != nil {
 			return
 		}
 
-		conandataFile := outDir + "/conandata.yml"
+		conandataFile := buildDir + "/conandata.yml"
 		conandataYml, err = os.ReadFile(conandataFile)
 		if err != nil {
 			return
@@ -138,7 +140,7 @@ func (p *Manager) Install(pkg *Package, flags int) (err error) {
 		fromVer := template.FromVer
 		source, ok := cd.Sources[fromVer]
 		if !ok {
-			return ErrVersionNotFound
+			return "", ErrVersionNotFound
 		}
 		cd.Sources = map[string]any{
 			pkgVer: replaceVer(source, fromVer, pkgVer),
@@ -152,10 +154,10 @@ func (p *Manager) Install(pkg *Package, flags int) (err error) {
 			return
 		}
 		rev = recipeRevision(pkg, gr, conandataYml)
-		conanfileDir = outDir
+		conanfileDir = buildDir
 	}
 
-	outFile := outDir + "/out.json"
+	outFile := buildDir + "/out.json"
 	out, err := os.Create(outFile)
 	if err == nil {
 		defer out.Close()
@@ -165,15 +167,16 @@ func (p *Manager) Install(pkg *Package, flags int) (err error) {
 
 	nameAndVer := pkg.Name + "/" + pkgVer
 	if template == nil {
-		return conanInstall(nameAndVer, outDir, conanfileDir, out, flags)
+		err = conanInstall(nameAndVer, buildDir, conanfileDir, out, options, flags)
+		return
 	}
 
 	logFile := ""
 	if flags&LogRevertProxy != 0 {
-		logFile = outDir + "/rp.log"
+		logFile = buildDir + "/rp.log"
 	}
-	return remoteProxy(flags, logFile, func() error {
-		return conanInstall(nameAndVer, outDir, conanfileDir, out, flags)
+	err = remoteProxy(flags, logFile, func() error {
+		return conanInstall(nameAndVer, buildDir, conanfileDir, out, options, flags)
 	}, func(mux *http.ServeMux) {
 		base := "/v2/conans/" + nameAndVer
 		revbase := base + "/_/_/revisions/" + rev
@@ -217,7 +220,7 @@ func (p *Manager) Install(pkg *Package, flags int) (err error) {
 			httputil.ReplyWithStream(w, http.StatusOK, "text/plain", strings.NewReader(data), int64(len(data)))
 		})
 		mux.HandleFunc(revbase+"/files/conan_export.tgz", func(w http.ResponseWriter, r *http.Request) {
-			conanExportTgz, err := tgzOfConandata(outDir)
+			conanExportTgz, err := tgzOfConandata(buildDir)
 			if err != nil {
 				replyError(w, err)
 				return
@@ -228,19 +231,31 @@ func (p *Manager) Install(pkg *Package, flags int) (err error) {
 			httputil.ReplyWith(w, http.StatusOK, "application/x-gzip", conanExportTgz)
 		})
 	})
+	return
 }
 
-func (p *Manager) outDir(pkg *Package) string {
-	return p.cacheDir + "/build/" + pkg.Name + "@" + pkg.Version
+func (p *Manager) BuildDir(pkg *Package, options []string) string {
+	dir := p.cacheDir + "/build/" + pkg.Name + "@" + pkg.Version
+	if options != nil {
+		h := md5.New()
+		for _, opt := range options {
+			h.Write(byteutil.Bytes(opt))
+		}
+		hash := base64.RawURLEncoding.EncodeToString(h.Sum(nil))
+		dir += "/" + hash
+	} else {
+		dir += "/static"
+	}
+	return dir
 }
 
 func (p *Manager) conanfileDir(pkgPath, pkgFolder string) string {
-	root := p.indexRoot()
+	root := p.IndexRoot()
 	return root + "/" + pkgPath + "/" + pkgFolder
 }
 
-func conanInstall(pkg, outDir, conanfileDir string, out io.Writer, flags int) (err error) {
-	args := make([]string, 0, 12)
+func conanInstall(pkg, outDir, conanfileDir string, out io.Writer, options []string, flags int) (err error) {
+	args := make([]string, 0, 16)
 	args = append(args, "install",
 		"--requires", pkg,
 		"--generator", "PkgConfigDeps",
@@ -248,6 +263,9 @@ func conanInstall(pkg, outDir, conanfileDir string, out io.Writer, flags int) (e
 		"--format", "json",
 		"--output-folder", outDir,
 	)
+	for _, opt := range options {
+		args = append(args, "--options", opt)
+	}
 	quietInstall := flags&ToolQuietInstall != 0
 	cmd, err := conanCmd.New(quietInstall, args...)
 	if err != nil {
diff --git a/xtool/cppkg/cppkg.go b/xtool/cppkg/cppkg.go
index f3687276..5b401bc6 100644
--- a/xtool/cppkg/cppkg.go
+++ b/xtool/cppkg/cppkg.go
@@ -29,15 +29,21 @@ const (
 // pkgAndVer: 7bitcoder/7bitconf@1.2.0
 func Install(pkgAndVer string, flags int) {
 	pkgPath, ver := parsePkgVer(pkgAndVer)
+	_, _, err := InstallPkg(pkgPath, ver, nil, flags)
+	check(err)
+}
 
+// InstallPkg installs a package with the given package path and version.
+func InstallPkg(pkgPath, ver string, options []string, flags int) (pkg *Package, buildDir string, err error) {
 	m, err := New("")
-	check(err)
-
-	pkg, err := m.Lookup(pkgPath, ver, flags)
-	check(err)
-
-	err = m.Install(pkg, flags)
-	check(err)
+	if err != nil {
+		return
+	}
+	pkg, err = m.Lookup(pkgPath, ver, flags)
+	if err == nil {
+		buildDir, err = m.Install(pkg, options, flags)
+	}
+	return
 }
 
 func parsePkgVer(pkg string) (string, string) {
diff --git a/xtool/cppkg/manager.go b/xtool/cppkg/manager.go
index 5abc3ab3..0eac4dd6 100644
--- a/xtool/cppkg/manager.go
+++ b/xtool/cppkg/manager.go
@@ -36,13 +36,10 @@ type Manager struct {
 	cacheDir string
 }
 
+// New creates a new package manager.
 func New(cacheDir string) (ret *Manager, err error) {
 	if cacheDir == "" {
-		cacheDir, err = os.UserCacheDir()
-		if err != nil {
-			return
-		}
-		cacheDir += "/cppkg"
+		cacheDir = CacheDir()
 	}
 	os.MkdirAll(cacheDir, os.ModePerm)
 	ret = &Manager{
@@ -51,6 +48,15 @@ func New(cacheDir string) (ret *Manager, err error) {
 	return
 }
 
+// CacheDir returns the cache directory to manage C/C++ packages.
+func CacheDir() string {
+	cacheDir, err := os.UserCacheDir()
+	if err != nil {
+		panic(err)
+	}
+	return cacheDir + "/cppkg"
+}
+
 type version struct {
 	Folder string `yaml:"folder"`
 }
@@ -68,6 +74,17 @@ type config struct {
 	Template Template           `yaml:"template"`
 }
 
+// getKnownLatestVer returns the latest known version and its details.
+// It returns empty version if no known version is found.
+func (p *config) getKnownLatestVer() (ver string, v version) {
+	for ver1, v1 := range p.Versions {
+		if ver == "" || compareVer(ver1, ver) > 0 {
+			ver, v = ver1, v1
+		}
+	}
+	return
+}
+
 // Package represents a C/C++ package.
 type Package struct {
 	Name     string
@@ -96,11 +113,14 @@ const (
 
 	// LogRevertProxy is a flag to log revert proxy.
 	LogRevertProxy
+
+	// KnownLatestVersion is a flag to use the known latest version.
+	KnownLatestVersion
 )
 
 // Lookup looks up a package by its path and version.
 func (p *Manager) Lookup(pkgPath, ver string, flags int) (_ *Package, err error) {
-	root := p.indexRoot()
+	root := p.IndexRoot()
 	err = indexUpate(root, flags)
 	if err != nil {
 		return
@@ -118,6 +138,11 @@ func (p *Manager) Lookup(pkgPath, ver string, flags int) (_ *Package, err error)
 	}
 
 	if ver == "" || ver == "latest" {
+		if flags&KnownLatestVersion != 0 {
+			if ver, v := conf.getKnownLatestVer(); ver != "" {
+				return &Package{conf.PkgName, pkgPath, ver, v.Folder, nil, nil}, nil
+			}
+		}
 		if conf.Template.Tag == "" {
 			return nil, ErrDynamicTag
 		}
@@ -144,7 +169,7 @@ func (p *Manager) Lookup(pkgPath, ver string, flags int) (_ *Package, err error)
 	return &Package{conf.PkgName, pkgPath, ver, templ.Folder, &templ, nil}, nil
 }
 
-func (p *Manager) indexRoot() string {
+func (p *Manager) IndexRoot() string {
 	return p.cacheDir + "/index"
 }