add OSXCROSS_GCC_NO_STATIC_RUNTIME option + cleanup

CHANGELOG

@@ -4,6 +4,9 @@ changed:
  * updated cctools to 862
  * updated ld64 to 241.9
 
+added:
+ * OSXCROSS_GCC_NO_STATIC_RUNTIME option (env)
+
 /******************************* v0.8 *******************************/
 
 changed:

README.md

@@ -50,6 +50,8 @@ That's it. See usage examples below.
 If you want to build GCC as well, then you can do this by running:  
 `[GCC_VERSION=4.9.1] [ENABLE_FORTRAN=1] ./build_gcc.sh`.  
 
+\[A gfortran usage example can be found [here](https://github.com/tpoechtrager/osxcross/issues/28#issuecomment-67047134)]
+
 But before you do this, make sure you have got the GCC build depedencies installed on your system.  
 
 On debian like systems you can run:
@@ -58,6 +60,11 @@ On debian like systems you can run:
 
 to install them.
 
+ATTENTION:
+
+OSXCross links libgcc and libstdc++ statically by default (this affects `-oc-use-gcc-libs` too).  
+You can turn this behavior off with `OSXCROSS_GCC_NO_STATIC_RUNTIME=1` (env).
+
 ### PACKAGING THE SDK: ###
 
 If you need a recent SDK, then you must do the SDK packaging on OS X.  

wrapper/programs/osxcross-env.cpp

@@ -47,14 +47,13 @@ int env(int argc, char **argv) {
 
     const char *pp = p;
 
-    for (; *p; ++p) {
+    do {
       auto badChar = [&](const char *p) {
         std::cerr << desc << " should not contain '" << *p << "'" << std::endl;
 
-        const char *start =
-          p - std::min(static_cast<size_t>(p - pp), static_cast<size_t>(30));
+        const char *start = p - std::min<size_t>(p - pp, 30);
 
-        size_t len = std::min(strlen(start), static_cast<size_t>(60));
+        size_t len = std::min<size_t>(strlen(start), 60);
         std::cerr << std::string(start, len) << std::endl;
 
         while (start++ != p)
@@ -71,7 +70,7 @@ int env(int argc, char **argv) {
         badChar(p);
         return true;
       }
-    }
+    } while (*p && *++p);
     return false;
   };
 

wrapper/target.cpp

@@ -306,30 +306,45 @@ void Target::setupGCCLibs(Arch arch) {
   std::stringstream GCCLibSTDCXXPath;
   std::stringstream GCCLibPath;
 
+  const bool dynamic = !!getenv("OSXCROSS_GCC_NO_STATIC_RUNTIME");
+
   getSDKPath(SDKPath);
 
-  GCCLibSTDCXXPath << SDKPath << "/../../" << otriple << "/lib";
-  GCCLibPath << SDKPath << "/../../lib/gcc/" << otriple << "/"
-             << gccversion.Str();
+  GCCLibPath << SDKPath << "/../../lib/gcc/"
+             << otriple << "/" << gccversion.Str();
 
-  auto addLib = [&](const std::stringstream &path, const char *lib) {
-    static std::stringstream tmp;
-    clear(tmp);
-    tmp << path.str() << "/lib" << lib << ".a";
-    fargs.push_back(tmp.str());
-  };
+  GCCLibSTDCXXPath << SDKPath << "/../../" << otriple << "/lib";
 
   switch (arch) {
   case Arch::i386:
   case Arch::i486:
   case Arch::i586:
   case Arch::i686:
-    GCCLibSTDCXXPath << "/" << getArchName(i386);
     GCCLibPath << "/" << getArchName(Arch::i386);
+    GCCLibSTDCXXPath << "/" << getArchName(i386);
   default:
     ;
   }
 
+  if (dynamic) {
+    fargs.push_back("-L");
+    fargs.push_back(GCCLibPath.str());
+    fargs.push_back("-L");
+    fargs.push_back(GCCLibSTDCXXPath.str());
+  }
+
+  auto addLib = [&](const std::stringstream &path, const char *lib) {
+    if (dynamic) {
+      fargs.push_back("-l");
+      fargs.push_back(lib);
+    } else {
+      static std::stringstream tmp;
+      clear(tmp);
+      tmp << path.str() << "/lib" << lib << ".a";
+      fargs.push_back(tmp.str());
+    }
+  };
+
   fargs.push_back("-Qunused-arguments");
 
   addLib(GCCLibSTDCXXPath, "stdc++");
@@ -565,13 +580,11 @@ bool Target::setup() {
       }
     }
 
-    /* TODO: libgcc */
-
-    if (isCXX() && (/*!isCXX11orNewer() ||*/ isLibCXX())) {
+    if (isCXX() && isLibCXX()) {
       fargs.push_back("-nostdinc++");
       fargs.push_back("-nodefaultlibs");
 
-      if (haveSourceFile() && !isGCH()) {
+      if (!isGCH()) {
         std::string tmp;
 
         tmp = "-L";
@@ -584,17 +597,13 @@ bool Target::setup() {
         if (isLibCXX()) {
           fargs.push_back("-lc++");
           fargs.push_back("-lc++abi");
-        } else if (isLibSTDCXX()) {
-          // Hack: Use SDKs libstdc++ as long
-          // >= -std=c++11 is not given.
-
-          fargs.push_back("-lstdc++");
         }
 
         fargs.push_back(OSNum <= OSVersion(10, 4) ? "-lgcc_s.10.4"
                                                   : "-lgcc_s.10.5");
       }
-    } else if (!isLibCXX() /*&& isCXX11orNewer()*/ && !isGCH()) {
+    } else if (!isLibCXX() && !isGCH() &&
+               !getenv("OSXCROSS_GCC_NO_STATIC_RUNTIME")) {
       fargs.push_back("-static-libgcc");
       fargs.push_back("-static-libstdc++");
     }