Working GCC package.

var/spack/packages/gcc/package.py

@@ -24,20 +24,67 @@
 ##############################################################################
 from spack import *
 
+from contextlib import closing
+from glob import glob
+
 class Gcc(Package):
     """The GNU Compiler Collection includes front ends for C, C++,
        Objective-C, Fortran, and Java."""
     homepage = "https://gcc.gnu.org"
-    url      = "http://www.netgull.com/gcc/releases/gcc-4.9.1/gcc-4.9.1.tar.bz2"
 
-    version('4.9.1', 'fddf71348546af523353bd43d34919c1')
+    list_url = 'http://mirrors.kernel.org/gnu/gcc/'
+    list_depth = 2
+
+    version('4.9.2', '4df8ee253b7f3863ad0b86359cd39c43',
+            url="http://mirrors.kernel.org/gnu/gcc/gcc-4.9.2/gcc-4.9.2.tar.bz2")
+    version('4.9.1', 'fddf71348546af523353bd43d34919c1',
+            url="http://mirrors.kernel.org/gnu/gcc/gcc-4.9.1/gcc-4.9.1.tar.bz2")
 
     depends_on("mpc")
     depends_on("mpfr")
     depends_on("gmp")
+    depends_on("libelf")
+
 
     def install(self, spec, prefix):
+        # libjava/configure needs a minor fix to install into spack paths.
+        filter_file(r"'@.*@'", "'@[[:alnum:]]*@'", 'libjava/configure', string=True)
+
+        # Rest of install is straightforward.
         configure("--prefix=%s" % prefix,
-                  "--disable-multilib")
+                  "--libdir=%s/lib64" % prefix,
+                  "--disable-multilib",
+                  "--enable-languages=c,c++,fortran,java,objc,go",
+                  "--enable-lto",
+                  "--with-quad")
         make()
         make("install")
+
+        self.write_rpath_specs()
+
+
+    @property
+    def spec_dir(self):
+        # e.g. lib64/gcc/x86_64-unknown-linux-gnu/4.9.2
+        spec_dir = glob("%s/lib64/gcc/*/*" % self.prefix)
+        return spec_dir[0] if spec_dir else None
+
+
+    def write_rpath_specs(self):
+        """Generate a spec file so the linker adds a rpath to the libs
+           the compiler used to build the executable."""
+        if not self.spec_dir:
+            tty.warn("Could not install specs for %s." % self.spec.format('$_$@'))
+            return
+
+        gcc = Executable(join_path(self.prefix.bin, 'gcc'))
+        lines = gcc('-dumpspecs', return_output=True).split("\n")
+        for i, line in enumerate(lines):
+            if line.startswith("*link:"):
+                specs_file = join_path(self.spec_dir, 'specs')
+                with closing(open(specs_file, 'w')) as out:
+                    out.write(lines[i] + "\n")
+                    out.write("-rpath %s/lib:%s/lib64 \\\n"
+                                % (self.prefix, self.prefix))
+                    out.write(lines[i+1] + "\n")
+                set_install_permissions(specs_file)