GHS: Use shorter object file names on collision

Modules/Compiler/GHS-C.cmake

@@ -1,6 +1,7 @@
 include(Compiler/GHS)
 
 set(CMAKE_C_VERBOSE_FLAG "-v")
+set(CMAKE_C_OUTPUT_EXTENSION ".o")
 
 set(CMAKE_C_FLAGS_INIT "")
 set(CMAKE_C_FLAGS_DEBUG_INIT "-Odebug -g")

Modules/Compiler/GHS-CXX.cmake

@@ -1,6 +1,7 @@
 include(Compiler/GHS)
 
 set(CMAKE_CXX_VERBOSE_FLAG "-v")
+set(CMAKE_CXX_OUTPUT_EXTENSION ".o")
 
 set(CMAKE_CXX_FLAGS_INIT "")
 set(CMAKE_CXX_FLAGS_DEBUG_INIT "-Odebug -g")

Source/cmGhsMultiTargetGenerator.cxx

@@ -18,7 +18,6 @@
 #include "cmSourceFile.h"
 #include "cmTarget.h"
 #include <assert.h>
-#include <cmAlgorithms.h>
 
 std::string const cmGhsMultiTargetGenerator::DDOption("-dynamic");
 
@@ -466,20 +465,14 @@ cmGhsMultiTargetGenerator::GetObjectNames(
   for (std::vector<cmSourceFile*>::const_iterator sf =
          duplicateSources.begin();
        sf != duplicateSources.end(); ++sf) {
-    static std::string::size_type const MAX_FULL_PATH_LENGTH = 247;
     std::string const longestObjectDirectory(
       cmGhsMultiTargetGenerator::ComputeLongestObjectDirectory(
         localGhsMultiGenerator, generatorTarget, *sf));
-    std::string fullFilename = (*sf)->GetFullPath();
-    bool const ObjPathFound = cmLocalGeneratorCheckObjectName(
-      fullFilename, longestObjectDirectory.size(), MAX_FULL_PATH_LENGTH);
-    if (!ObjPathFound) {
-      cmSystemTools::Error("Object path \"", fullFilename.c_str(),
-                           "\" too long", "");
-    }
-    cmsys::SystemTools::ReplaceString(fullFilename, ":/", "_");
-    cmsys::SystemTools::ReplaceString(fullFilename, "/", "_");
-    objectNamesCorrected[*sf] = fullFilename;
+    std::string objFilenameName =
+      localGhsMultiGenerator->GetObjectFileNameWithoutTarget(
+        **sf, longestObjectDirectory);
+    cmsys::SystemTools::ReplaceString(objFilenameName, "/", "_");
+    objectNamesCorrected[*sf] = objFilenameName;
   }
 
   return objectNamesCorrected;
@@ -517,8 +510,7 @@ void cmGhsMultiTargetGenerator::WriteSources(
       this->WriteObjectLangOverride(this->FolderBuildStreams[sgPath], (*si));
       if (objectNames.end() != objectNames.find(*si)) {
         *this->FolderBuildStreams[sgPath]
-          << "    -o \"" << objectNames.find(*si)->second << ".o\""
-          << std::endl;
+          << "    -o \"" << objectNames.find(*si)->second << "\"" << std::endl;
       }
 
       this->WriteObjectDir(this->FolderBuildStreams[sgPath],

Tests/GhsMultiDuplicateSourceFilenames/CMakeLists.txt

@@ -1,7 +1,12 @@
 cmake_minimum_required(VERSION 3.5)
 project(demo C)
 
-add_library(libdemo test.c subfolder/test.c)
+add_library(libdemo
+  test.c
+  subfolder_test.c
+  subfolder_test_0.c
+  "subfolder/test.c"
+)
 
 add_executable(demo main.c)
 target_link_libraries(demo libdemo)

Tests/GhsMultiDuplicateSourceFilenames/main.c

@@ -1,9 +1,13 @@
 int test_a(void);
 int test_b(void);
+int test_c(void);
+int test_d(void);
 
 int main(int argc, char* argv[])
 {
   test_a();
   test_b();
+  test_c();
+  test_d();
   return 0;
 }

Tests/GhsMultiDuplicateSourceFilenames/subfolder_test.c

@@ -0,0 +1,5 @@
+
+int test_c()
+{
+  return 1;
+}

Tests/GhsMultiDuplicateSourceFilenames/subfolder_test_0.c

@@ -0,0 +1,5 @@
+
+int test_d()
+{
+  return 1;
+}