Support prebuilt shared libs end with versions
This commit changes how `cc/androidmk.go` generates LOCAL_MODULE_STEM,
LOCAL_MODULE_SUFFIX, and LOCAL_BUILT_MODULE_STEM. Now, `splitFileExt()`
takes a file name and a list of expected file extensions.
`splitFileExt()` searches the first occurrence of expected file
extensions in the file name. If it can not find any, it will simply
return the last file extension.
Before this commit, `cc/androidmk.go` simply extracts the last file
extension (e.g. `.so`). However, if the prebuilt shared libs end with
version numbers (e.g. `libc++.so.1`), it will use `$(LOCAL_MODULE).1` as
LOCAL_BUILT_MODULE_STEM and this will lead to missing target ninja
error.
Bug: 111579848
Test: Build a program that links libc++_host (from prebuilts/clang)
Change-Id: Id96726c69705d518ea725bb6abd8ff4527ca0cbc
diff --git a/cc/util.go b/cc/util.go
index 1e4a0c0..8de4210 100644
--- a/cc/util.go
+++ b/cc/util.go
@@ -16,6 +16,7 @@
import (
"fmt"
+ "path/filepath"
"regexp"
"strings"
@@ -102,3 +103,29 @@
}
return list
}
+
+var shlibVersionPattern = regexp.MustCompile("(?:\\.\\d+)+")
+
+// splitFileExt splits a file name into root, suffix and ext. root stands for the file name without
+// the file extension and the version number (e.g. "libexample"). suffix stands for the
+// concatenation of the file extension and the version number (e.g. ".so.1.0"). ext stands for the
+// file extension after the version numbers are trimmed (e.g. ".so").
+func splitFileExt(name string) (string, string, string) {
+ // Extract and trim the shared lib version number if the file name ends with dot digits.
+ suffix := ""
+ matches := shlibVersionPattern.FindAllStringIndex(name, -1)
+ if len(matches) > 0 {
+ lastMatch := matches[len(matches)-1]
+ if lastMatch[1] == len(name) {
+ suffix = name[lastMatch[0]:lastMatch[1]]
+ name = name[0:lastMatch[0]]
+ }
+ }
+
+ // Extract the file name root and the file extension.
+ ext := filepath.Ext(name)
+ root := strings.TrimSuffix(name, ext)
+ suffix = ext + suffix
+
+ return root, suffix, ext
+}