libgcrypt and libgpg-error packages.

var/spack/packages/libgcrypt/package.py

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+from spack import *
+
+class Libgcrypt(Package):
+    """Libgcrypt is a general purpose cryptographic library based on
+       the code from GnuPG. It provides functions for all cryptographic
+       building blocks: symmetric ciphers, hash algorithms, MACs, public
+       key algorithms, large integer functions, random numbers and a lot
+       of supporting functions. """
+    homepage = "http://www.gnu.org/software/libgcrypt/"
+    url      = "ftp://ftp.gnupg.org/gcrypt/libgcrypt/libgcrypt-1.6.2.tar.bz2"
+
+    version('1.6.2', 'b54395a93cb1e57619943c082da09d5f')
+
+    depends_on("libgpg-error")
+
+    def install(self, spec, prefix):
+        configure("--prefix=%s" % prefix)
+        make()
+        make("install")

var/spack/packages/libgpg-error/package.py

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+from spack import *
+
+class LibgpgError(Package):
+    """Libgpg-error is a small library that defines common error
+       values for all GnuPG components. Among these are GPG, GPGSM,
+       GPGME, GPG-Agent, libgcrypt, Libksba, DirMngr, Pinentry,
+       SmartCard Daemon and possibly more in the future. """
+
+    homepage = "https://www.gnupg.org/related_software/libgpg-error"
+    url      = "ftp://ftp.gnupg.org/gcrypt/libgpg-error/libgpg-error-1.18.tar.bz2"
+
+    version('1.18', '12312802d2065774b787cbfc22cc04e9')
+
+    def install(self, spec, prefix):
+        configure("--prefix=%s" % prefix)
+        make()
+        make("install")