Ninja Multi-Config: Run POST_BUILD when BYPRODUCTS don't overlap

Fixes: #21252

3 files changed, 21 insertions, 15 deletions

diff --git a/Source/cmLocalNinjaGenerator.cxx b/Source/cmLocalNinjaGenerator.cxx
index 5a747e5..7229101 100644
--- a/Source/cmLocalNinjaGenerator.cxx
+++ b/Source/cmLocalNinjaGenerator.cxx
@@ -693,13 +693,11 @@ void cmLocalNinjaGenerator::WriteCustomCommandBuildStatement(
   }
 }
 
-namespace {
-bool HasUniqueByproducts(cmLocalGenerator& lg,
-                         std::vector<std::string> const& byproducts,
-                         cmListFileBacktrace const& bt)
+bool cmLocalNinjaGenerator::HasUniqueByproducts(
+  std::vector<std::string> const& byproducts, cmListFileBacktrace const& bt)
 {
   std::vector<std::string> configs =
-    lg.GetMakefile()->GetGeneratorConfigs(cmMakefile::IncludeEmptyConfig);
+    this->GetMakefile()->GetGeneratorConfigs(cmMakefile::IncludeEmptyConfig);
   cmGeneratorExpression ge(bt);
   for (std::string const& p : byproducts) {
     if (cmGeneratorExpression::Find(p) == std::string::npos) {
@@ -709,7 +707,7 @@ bool HasUniqueByproducts(cmLocalGenerator& lg,
     std::unique_ptr<cmCompiledGeneratorExpression> cge = ge.Parse(p);
     for (std::string const& config : configs) {
       for (std::string const& b :
-           lg.ExpandCustomCommandOutputPaths(*cge, config)) {
+           this->ExpandCustomCommandOutputPaths(*cge, config)) {
         if (!seen.insert(b).second) {
           return false;
         }
@@ -719,6 +717,7 @@ bool HasUniqueByproducts(cmLocalGenerator& lg,
   return true;
 }
 
+namespace {
 bool HasUniqueOutputs(std::vector<cmCustomCommandGenerator> const& ccgs)
 {
   std::set<std::string> allOutputs;
@@ -746,7 +745,7 @@ std::string cmLocalNinjaGenerator::CreateUtilityOutput(
   // In Ninja Multi-Config, we can only produce cross-config utility
   // commands if all byproducts are per-config.
   if (!this->GetGlobalGenerator()->IsMultiConfig() ||
-      !HasUniqueByproducts(*this, byproducts, bt)) {
+      !this->HasUniqueByproducts(byproducts, bt)) {
     return this->cmLocalGenerator::CreateUtilityOutput(targetName, byproducts,
                                                        bt);
   }
diff --git a/Source/cmLocalNinjaGenerator.h b/Source/cmLocalNinjaGenerator.h
index 87d5e53..5b850f3 100644
--- a/Source/cmLocalNinjaGenerator.h
+++ b/Source/cmLocalNinjaGenerator.h
@@ -86,6 +86,9 @@ public:
                                cmNinjaDeps& ninjaDeps,
                                const std::string& config);
 
+  bool HasUniqueByproducts(std::vector<std::string> const& byproducts,
+                           cmListFileBacktrace const& bt);
+
 protected:
   std::string ConvertToIncludeReference(
     std::string const& path,
diff --git a/Source/cmNinjaNormalTargetGenerator.cxx b/Source/cmNinjaNormalTargetGenerator.cxx
index 620b8ff..49e5e4c 100644
--- a/Source/cmNinjaNormalTargetGenerator.cxx
+++ b/Source/cmNinjaNormalTargetGenerator.cxx
@@ -12,6 +12,7 @@
 #include <utility>
 
 #include <cm/memory>
+#include <cm/optional>
 #include <cm/vector>
 
 #include "cmComputeLinkInformation.h"
@@ -1238,14 +1239,17 @@ void cmNinjaNormalTargetGenerator::WriteLinkStatement(
   std::vector<std::string> preLinkCmdLines;
   std::vector<std::string> postBuildCmdLines;
 
-  if (config == fileConfig) {
-    std::vector<std::string>* cmdLineLists[3] = { &preLinkCmdLines,
-                                                  &preLinkCmdLines,
-                                                  &postBuildCmdLines };
-
-    for (unsigned i = 0; i != 3; ++i) {
-      for (cmCustomCommand const& cc : *cmdLists[i]) {
-        cmCustomCommandGenerator ccg(cc, config, this->GetLocalGenerator());
+  std::vector<std::string>* cmdLineLists[3] = { &preLinkCmdLines,
+                                                &preLinkCmdLines,
+                                                &postBuildCmdLines };
+
+  for (unsigned i = 0; i != 3; ++i) {
+    for (cmCustomCommand const& cc : *cmdLists[i]) {
+      if (config == fileConfig ||
+          this->GetLocalGenerator()->HasUniqueByproducts(cc.GetByproducts(),
+                                                         cc.GetBacktrace())) {
+        cmCustomCommandGenerator ccg(cc, fileConfig, this->GetLocalGenerator(),
+                                     true, config);
         localGen.AppendCustomCommandLines(ccg, *cmdLineLists[i]);
         std::vector<std::string> const& ccByproducts = ccg.GetByproducts();
         std::transform(ccByproducts.begin(), ccByproducts.end(),