Propagate empty vs unspecified system_shared_libs correctly.
Necessary to get correct prebuilts for many Bionic libs.
Cleaned up numerious "system_shared_libs: []" from test fixtures, since
they otherwise would need correction in the expected results, and it is
better to have a single test focused on testing system_shared_libs
propagation.
Test: m nothing
Bug: 152255951
Change-Id: If2e8a5296223e6281d833312660e8e9e4cd184c0
diff --git a/cc/binary_sdk_member.go b/cc/binary_sdk_member.go
index 9b3235c..1d9cc54 100644
--- a/cc/binary_sdk_member.go
+++ b/cc/binary_sdk_member.go
@@ -18,6 +18,7 @@
"path/filepath"
"android/soong/android"
+
"github.com/google/blueprint"
)
@@ -137,7 +138,9 @@
propertySet.AddPropertyWithTag("shared_libs", p.SharedLibs, builder.SdkMemberReferencePropertyTag(false))
}
- if len(p.SystemSharedLibs) > 0 {
+ // SystemSharedLibs needs to be propagated if it's a list, even if it's empty,
+ // so check for non-nil instead of nonzero length.
+ if p.SystemSharedLibs != nil {
propertySet.AddPropertyWithTag("system_shared_libs", p.SystemSharedLibs, builder.SdkMemberReferencePropertyTag(false))
}
}
diff --git a/cc/cc.go b/cc/cc.go
index 037b99c..4ed27f4 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -378,7 +378,7 @@
type specifiedDeps struct {
sharedLibs []string
- systemSharedLibs []string
+ systemSharedLibs []string // Note nil and [] are semantically distinct.
}
type installer interface {
diff --git a/cc/library.go b/cc/library.go
index 346e7d8..2ced2c5 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -749,10 +749,12 @@
func (library *libraryDecorator) linkerDeps(ctx DepsContext, deps Deps) Deps {
if library.static() {
+ // Compare with nil because an empty list needs to be propagated.
if library.StaticProperties.Static.System_shared_libs != nil {
library.baseLinker.Properties.System_shared_libs = library.StaticProperties.Static.System_shared_libs
}
} else if library.shared() {
+ // Compare with nil because an empty list needs to be propagated.
if library.SharedProperties.Shared.System_shared_libs != nil {
library.baseLinker.Properties.System_shared_libs = library.SharedProperties.Shared.System_shared_libs
}
@@ -828,10 +830,21 @@
}
specifiedDeps.sharedLibs = append(specifiedDeps.sharedLibs, properties.Shared_libs...)
- specifiedDeps.systemSharedLibs = append(specifiedDeps.systemSharedLibs, properties.System_shared_libs...)
+
+ // Must distinguish nil and [] in system_shared_libs - ensure that [] in
+ // either input list doesn't come out as nil.
+ if specifiedDeps.systemSharedLibs == nil {
+ specifiedDeps.systemSharedLibs = properties.System_shared_libs
+ } else {
+ specifiedDeps.systemSharedLibs = append(specifiedDeps.systemSharedLibs, properties.System_shared_libs...)
+ }
specifiedDeps.sharedLibs = android.FirstUniqueStrings(specifiedDeps.sharedLibs)
- specifiedDeps.systemSharedLibs = android.FirstUniqueStrings(specifiedDeps.systemSharedLibs)
+ if len(specifiedDeps.systemSharedLibs) > 0 {
+ // Skip this if systemSharedLibs is either nil or [], to ensure they are
+ // retained.
+ specifiedDeps.systemSharedLibs = android.FirstUniqueStrings(specifiedDeps.systemSharedLibs)
+ }
return specifiedDeps
}
@@ -1371,6 +1384,8 @@
len(sharedCompiler.SharedProperties.Shared.Static_libs) == 0 &&
len(staticCompiler.StaticProperties.Static.Shared_libs) == 0 &&
len(sharedCompiler.SharedProperties.Shared.Shared_libs) == 0 &&
+ // Compare System_shared_libs properties with nil because empty lists are
+ // semantically significant for them.
staticCompiler.StaticProperties.Static.System_shared_libs == nil &&
sharedCompiler.SharedProperties.Shared.System_shared_libs == nil {
diff --git a/cc/library_sdk_member.go b/cc/library_sdk_member.go
index 4967455..0a11af1 100644
--- a/cc/library_sdk_member.go
+++ b/cc/library_sdk_member.go
@@ -212,7 +212,9 @@
outputProperties.AddPropertyWithTag("shared_libs", libInfo.SharedLibs, builder.SdkMemberReferencePropertyTag(false))
}
- if len(libInfo.SystemSharedLibs) > 0 {
+ // SystemSharedLibs needs to be propagated if it's a list, even if it's empty,
+ // so check for non-nil instead of nonzero length.
+ if libInfo.SystemSharedLibs != nil {
outputProperties.AddPropertyWithTag("system_shared_libs", libInfo.SystemSharedLibs, builder.SdkMemberReferencePropertyTag(false))
}
@@ -327,7 +329,8 @@
// This field is exported as its contents may not be arch specific.
SharedLibs []string
- // The set of system shared libraries
+ // The set of system shared libraries. Note nil and [] are semantically
+ // distinct - see BaseLinkerProperties.System_shared_libs.
//
// This field is exported as its contents may not be arch specific.
SystemSharedLibs []string
diff --git a/cc/linker.go b/cc/linker.go
index ae5ee0a..f65d7c8 100644
--- a/cc/linker.go
+++ b/cc/linker.go
@@ -491,7 +491,15 @@
func (linker *baseLinker) linkerSpecifiedDeps(specifiedDeps specifiedDeps) specifiedDeps {
specifiedDeps.sharedLibs = append(specifiedDeps.sharedLibs, linker.Properties.Shared_libs...)
- specifiedDeps.systemSharedLibs = append(specifiedDeps.systemSharedLibs, linker.Properties.System_shared_libs...)
+
+ // Must distinguish nil and [] in system_shared_libs - ensure that [] in
+ // either input list doesn't come out as nil.
+ if specifiedDeps.systemSharedLibs == nil {
+ specifiedDeps.systemSharedLibs = linker.Properties.System_shared_libs
+ } else {
+ specifiedDeps.systemSharedLibs = append(specifiedDeps.systemSharedLibs, linker.Properties.System_shared_libs...)
+ }
+
return specifiedDeps
}