-improve crosscompiling from Linux to iphone (#10526)

Patch by Karol Krizka

Alex

Source/cmFindCommon.cxx

@@ -423,3 +423,17 @@ void cmFindCommon::AddTrailingSlashes(std::vector<std::string>& paths)
       }
     }
 }
+
+//----------------------------------------------------------------------------
+void cmFindCommon::SetMakefile(cmMakefile* makefile)
+{
+  cmCommand::SetMakefile(makefile);
+
+  // If we are building for Apple (OSX or also iphone), make sure
+  // that frameworks and bundles are searched first.
+  if(this->Makefile->IsOn("APPLE"))
+    {
+    this->SearchFrameworkFirst = true;
+    this->SearchAppBundleFirst = true;
+    }
+}

Source/cmFindCommon.h

@@ -61,6 +61,8 @@ protected:
                         PathType pathType);
   void AddPathInternal(std::string const& in_path, PathType pathType);
 
+  void SetMakefile(cmMakefile* makefile);
+
   bool NoDefaultPath;
   bool NoCMakePath;
   bool NoCMakeEnvironmentPath;

Source/cmLocalGenerator.cxx

@@ -712,9 +712,7 @@ void cmLocalGenerator::AddBuildTargetRule(const char* llang, cmTarget& target)
  
   std::string langFlags;
   this->AddLanguageFlags(langFlags, llang, 0);
-#ifdef __APPLE__
   this->AddArchitectureFlags(langFlags, &target, llang, 0);
-#endif /* __APPLE__ */
   vars.LanguageCompileFlags = langFlags.c_str();
   
   cmCustomCommandLines commandLines;
@@ -1272,8 +1270,8 @@ const char* cmLocalGenerator::GetIncludeFlags(const char* lang)
 #endif
   for(i = includes.begin(); i != includes.end(); ++i)
     {
-#ifdef __APPLE__
-    if(cmSystemTools::IsPathToFramework(i->c_str()))
+    if(this->Makefile->IsOn("APPLE")
+       && cmSystemTools::IsPathToFramework(i->c_str()))
       {
       std::string frameworkDir = *i;
       frameworkDir += "/../";
@@ -1288,7 +1286,7 @@ const char* cmLocalGenerator::GetIncludeFlags(const char* lang)
         }
       continue;
       }
-#endif
+
     std::string include = *i;
     if(!flagUsed || repeatFlag)
       {
@@ -1766,12 +1764,17 @@ void cmLocalGenerator::OutputLinkLibraries(std::ostream& fout,
 
 
 //----------------------------------------------------------------------------
-#ifdef __APPLE__
 void cmLocalGenerator::AddArchitectureFlags(std::string& flags,
                                             cmTarget* target,
                                             const char *lang,
                                             const char* config)
 {
+  // Only add Mac OS X specific flags on Darwin platforms (OSX and iphone):
+  if(!this->Makefile->IsOn("APPLE"))
+    {
+    return;
+    }
+
   if(this->EmitUniversalBinaryFlags)
     {
     std::vector<std::string> archs;
@@ -1828,7 +1831,6 @@ void cmLocalGenerator::AddArchitectureFlags(std::string& flags,
       }
     }
 }
-#endif /* __APPLE__ */
 
 
 //----------------------------------------------------------------------------

Source/cmLocalGenerator.h

@@ -133,10 +133,8 @@ public:
   std::vector<cmLocalGenerator*>& GetChildren() { return this->Children; };
     
 
-#ifdef __APPLE__
   void AddArchitectureFlags(std::string& flags, cmTarget* target,
                             const char *lang, const char* config);
-#endif /* __APPLE__ */
 
   void AddLanguageFlags(std::string& flags, const char* lang,
                         const char* config);

Source/cmMakefileExecutableTargetGenerator.cxx

@@ -229,10 +229,8 @@ void cmMakefileExecutableTargetGenerator::WriteExecutableRule(bool relink)
   // Add language feature flags.
   this->AddFeatureFlags(flags, linkLanguage);
 
-#ifdef __APPLE__
   this->LocalGenerator->AddArchitectureFlags(flags, this->Target,
                                              linkLanguage, this->ConfigName);
-#endif /* __APPLE__ */
 
   // Add target-specific linker flags.
   this->LocalGenerator->AppendFlags

Source/cmMakefileLibraryTargetGenerator.cxx

@@ -682,10 +682,8 @@ void cmMakefileLibraryTargetGenerator::WriteLibraryRules
   std::string langFlags;
   this->AddFeatureFlags(langFlags, linkLanguage);
 
-#ifdef __APPLE__
   this->LocalGenerator->AddArchitectureFlags(langFlags, this->Target,
                                              linkLanguage, this->ConfigName);
-#endif /* __APPLE__ */
 
   // remove any language flags that might not work with the
   // particular os

Source/cmMakefileTargetGenerator.cxx

@@ -294,10 +294,8 @@ void cmMakefileTargetGenerator::WriteTargetLanguageFlags()
     // Add language feature flags.
     this->AddFeatureFlags(flags, lang);
 
-#ifdef __APPLE__
     this->LocalGenerator->AddArchitectureFlags(flags, this->Target,
                                                lang, this->ConfigName);
-#endif /* __APPLE__ */
 
     // Fortran-specific flags computed for this target.
     if(*l == "Fortran")
@@ -1439,11 +1437,15 @@ void cmMakefileTargetGenerator::WriteTargetDriverRule(const char* main_output,
 //----------------------------------------------------------------------------
 std::string cmMakefileTargetGenerator::GetFrameworkFlags()
 {
-#ifndef __APPLE__
+ if(!this->Makefile->IsOn("APPLE"))
+   {
    return std::string();
-#else
+   }
+
  std::set<cmStdString> emitted;
+#ifdef __APPLE__  /* don't insert this when crosscompiling e.g. to iphone */
   emitted.insert("/System/Library/Frameworks");
+#else
   std::vector<std::string> includes;
   this->LocalGenerator->GetIncludeDirectories(includes);
   std::vector<std::string>::iterator i;