ENH: Implement linking with paths to library files instead of -L and -l separation. See bug #3832

  - This is purely an implementation improvement.  No interface has changed.
  - Create cmComputeLinkInformation class
  - Move and re-implement logic from:
      cmLocalGenerator::ComputeLinkInformation
      cmOrderLinkDirectories
  - Link libraries to targets with their full path (if it is known)
  - Dirs specified with link_directories command still added with -L
  - Make link type specific to library names without paths
    (name libfoo.a without path becomes -Wl,-Bstatic -lfoo)
  - Make directory ordering specific to a runtime path computation feature
    (look for conflicting SONAMEs instead of library names)
  - Implement proper rpath support on HP-UX and AIX.

1 files changed, 3 insertions, 115 deletions

diff --git a/Tests/Complex/Executable/complex.cxx b/Tests/Complex/Executable/complex.cxx
index bf07a37c3f..95e77b6403 100644
--- a/Tests/Complex/Executable/complex.cxx
+++ b/Tests/Complex/Executable/complex.cxx
@@ -13,7 +13,6 @@ extern "C" {
 #include "cmSystemTools.h"
 #include "cmDynamicLoader.h"
 #include "cmSystemTools.h"
-#include "cmOrderLinkDirectories.h"
 #include "cmGeneratedFileStream.h"
 #include <cmsys/DynamicLoader.hxx>
 #else
@@ -69,99 +68,6 @@ void cmPassed(const char* Message, const char* m2="")
 #endif
 
 #ifdef COMPLEX_TEST_CMAKELIB
-// Here is a stupid function that tries to use std::string methods
-// so that the dec cxx compiler will instantiate the stuff that
-// we are using from the CMakeLib library....
-bool TestLibraryOrder(bool shouldFail)
-{ 
-  std::string Adir = std::string(BINARY_DIR) + std::string("/A");
-  std::string Bdir = std::string(BINARY_DIR) + std::string("/B");
-  std::string Cdir = std::string(BINARY_DIR) + std::string("/C");
-#ifdef _WIN32
-  // Avoid case problems for windows paths.
-  if(Adir[0] >= 'A' && Adir[0] <= 'Z') { Adir[0] += 'a' - 'A'; }
-  if(Bdir[0] >= 'A' && Bdir[0] <= 'Z') { Bdir[0] += 'a' - 'A'; }
-  if(Cdir[0] >= 'A' && Cdir[0] <= 'Z') { Cdir[0] += 'a' - 'A'; }
-  Adir = cmSystemTools::GetActualCaseForPath(Adir.c_str());
-  Bdir = cmSystemTools::GetActualCaseForPath(Bdir.c_str());
-  Cdir = cmSystemTools::GetActualCaseForPath(Cdir.c_str());
-#endif
-  
-  if(!shouldFail)
-    {
-    std::string rm = Bdir;
-    rm += "/libA.a";
-    cmSystemTools::RemoveFile(rm.c_str());
-    }
-  std::vector<std::string> linkLibraries;
-  std::vector<std::string> linkDirectories;
-  linkDirectories.push_back(Adir);
-  linkDirectories.push_back(Bdir);
-  linkDirectories.push_back(Cdir);
-  linkDirectories.push_back("/lib/extra/stuff");
-  Adir += "/libA.a";
-  Bdir += "/libB.a";
-  Cdir += "/libC.a";
-  linkLibraries.push_back(Adir);
-  linkLibraries.push_back(Bdir);
-  linkLibraries.push_back(Cdir);
-  linkLibraries.push_back("-lm");
-  std::vector<cmStdString> sortedpaths;
-  std::vector<cmStdString> linkItems;
-  cmOrderLinkDirectories orderLibs;
-  orderLibs.DebugOn();
-  orderLibs.AddLinkExtension(".so");
-  orderLibs.AddLinkExtension(".a");
-  orderLibs.AddLinkPrefix("lib");
-  cmTargetManifest manifest;
-  orderLibs.SetLinkInformation("test", linkLibraries, linkDirectories,
-                               manifest, "");
-  bool ret = orderLibs.DetermineLibraryPathOrder();
-  if(!ret)
-    {
-    std::cout << orderLibs.GetWarnings() << "\n";
-    }
-  orderLibs.GetLinkerInformation(sortedpaths, linkItems);
-  std::cout << "Sorted Link Paths:\n";
-  for(std::vector<cmStdString>::iterator i = sortedpaths.begin();
-      i != sortedpaths.end(); ++i)
-    {
-    std::cout << *i << "\n";
-    }
-  std::cout << "Link Items: \n";
-  for(std::vector<cmStdString>::iterator i = linkItems.begin();
-      i != linkItems.end(); ++i)
-    {
-    std::cout << *i << "\n";
-    }
-  if(!(linkItems[0] == "A" && 
-       linkItems[1] == "B" && 
-       linkItems[2] == "C" && 
-       linkItems[3] == "-lm" ))
-    {
-    std::cout << "fail because link items should be A B C -lm and the are not\n";
-    return shouldFail;
-    }
-  
-     
-  // if this is not the fail test then the order should be f B C A
-  if(!shouldFail)
-    {
-    char order[5];
-    order[4] = 0;
-    for(int i =0; i < 4; ++i)
-      {
-      order[i] = sortedpaths[i][sortedpaths[i].size()-1];
-      }
-    if(!(strcmp(order, "fBCA") == 0 || strcmp(order, "BCAf") == 0))
-      {
-      std::cout << "fail because order should be /lib/extra/stuff B C A and it is not\n";
-      return false;
-      }
-    }
-  return ret;
-}
-
 // ======================================================================
 
 void TestAndRemoveFile(const char* filename) 
@@ -286,6 +192,9 @@ void TestCMGeneratedFileSTream()
 }
 #endif
 
+// Here is a stupid function that tries to use std::string methods
+// so that the dec cxx compiler will instantiate the stuff that
+// we are using from the CMakeLib library....
 void ForceStringUse()
 {
   std::vector<std::string> v;
@@ -1283,27 +1192,6 @@ int main()
 #endif
 
 #ifdef COMPLEX_TEST_CMAKELIB
-  // first run with shouldFail = true, this will
-  // run with A B C as set by the CMakeList.txt file.
-  if(!TestLibraryOrder(true))
-    {
-    cmPassed("CMake cmOrderLinkDirectories failed when it should.");
-    }
-  else
-    {
-    cmFailed("CMake cmOrderLinkDirectories failed to fail when given an impossible set of paths.");
-    }
-  // next run with shouldPass = true, this will 
-  // run with B/libA.a removed and should create the order
-  // B C A
-  if(TestLibraryOrder(false))
-    {
-    cmPassed("CMake cmOrderLinkDirectories worked.");
-    }
-  else
-    {
-    cmFailed("CMake cmOrderLinkDirectories failed.");
-    }
   // Test the generated file stream.
   TestCMGeneratedFileSTream();
 #endif