Merge topic 'file-rpath-elf-static'

02f3e5be6a file(RPATH_CHANGE ...): no-op for static binary
ccbbf64552 Tests/RunCMake/file-RPATH: Prepare to cover statically linked binaries

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !9623

Source/cmELF.cxx

@@ -112,6 +112,9 @@ public:
   virtual bool IsMips() const = 0;
   virtual void PrintInfo(std::ostream& os) const = 0;
 
+  /** Returns true if the ELF file has a dynamic section **/
+  bool HasDynamicSection() const { return this->DynamicSectionIndex >= 0; }
+
   // Lookup the SONAME in the DYNAMIC section.
   StringEntry const* GetSOName()
   {
@@ -461,7 +464,7 @@ template <class Types>
 bool cmELFInternalImpl<Types>::LoadDynamicSection()
 {
   // If there is no dynamic section we are done.
-  if (this->DynamicSectionIndex < 0) {
+  if (!this->HasDynamicSection()) {
     return false;
   }
 
@@ -772,6 +775,11 @@ std::vector<char> cmELF::EncodeDynamicEntries(
   return std::vector<char>();
 }
 
+bool cmELF::HasDynamicSection() const
+{
+  return this->Valid() && this->Internal->HasDynamicSection();
+}
+
 bool cmELF::GetSOName(std::string& soname)
 {
   if (StringEntry const* se = this->GetSOName()) {

Source/cmELF.h

@@ -88,6 +88,9 @@ public:
   std::vector<char> EncodeDynamicEntries(
     const DynamicEntryList& entries) const;
 
+  /** Returns true if the ELF file has a dynamic section **/
+  bool HasDynamicSection() const;
+
   /** Get the SONAME field if any.  */
   bool GetSOName(std::string& soname);
   StringEntry const* GetSOName();

Source/cmSystemTools.cxx

@@ -2817,6 +2817,10 @@ cm::optional<bool> AdjustRPathELF(std::string const& file,
       return cm::nullopt; // Not a valid ELF file.
     }
 
+    if (!elf.HasDynamicSection()) {
+      return true; // No dynamic section to update.
+    }
+
     // Get the RPATH and RUNPATH entries from it.
     int se_count = 0;
     cmELF::StringEntry const* se[2] = { nullptr, nullptr };

Tests/RunCMake/file-RPATH/Common.cmake

@@ -1,12 +1,16 @@
 # Prepare binaries on which to operate.
 set(in "${CMAKE_CURRENT_LIST_DIR}/${format}")
 set(out "${CMAKE_CURRENT_BINARY_DIR}")
-foreach(f ${names})
+foreach(f ${dynamic})
   file(COPY ${in}/${f} DESTINATION ${out} NO_SOURCE_PERMISSIONS)
-  list(APPEND files "${out}/${f}")
+  list(APPEND dynamic_files "${out}/${f}")
+endforeach()
+foreach(f ${static})
+  file(COPY ${in}/${f} DESTINATION ${out} NO_SOURCE_PERMISSIONS)
+  list(APPEND static_files "${out}/${f}")
 endforeach()
 
-foreach(f ${files})
+foreach(f ${dynamic_files})
   # Check for the initial RPATH.
   file(RPATH_CHECK FILE "${f}" RPATH "/sample/rpath")
   if(NOT EXISTS "${f}")
@@ -65,11 +69,11 @@ endforeach()
 
 # TODO Implement RPATH_SET in XCOFF.
 if(format STREQUAL "ELF")
-  foreach(f ${names})
+  foreach(f ${dynamic})
     file(COPY ${in}/${f} DESTINATION ${out} NO_SOURCE_PERMISSIONS)
   endforeach()
 
-  foreach(f ${files})
+  foreach(f ${dynamic_files})
     # Set the RPATH.
     file(RPATH_SET FILE "${f}"
       NEW_RPATH "/new/rpath")
@@ -99,3 +103,8 @@ if(format STREQUAL "ELF")
     endif()
   endforeach()
 endif()
+
+# Verify that modifying rpaths on a static library is a no-op
+foreach(f ${static_files})
+  file(RPATH_CHANGE FILE "${f}" OLD_RPATH "/rpath/foo" NEW_RPATH "/rpath/bar")
+endforeach()

Tests/RunCMake/file-RPATH/ELF.cmake

@@ -1,9 +1,12 @@
-set(names
+set(dynamic
   elf32lsb.bin
   elf32msb.bin
   elf64lsb.bin
   elf64msb.bin
   )
+set(static
+  elf64lsb-static.bin
+  )
 set(format ELF)
 
 include(${CMAKE_CURRENT_LIST_DIR}/Common.cmake)

Tests/RunCMake/file-RPATH/XCOFF.cmake

@@ -1,4 +1,4 @@
-set(names
+set(dynamic
   xcoff32.bin
   xcoff64.bin
   )