xar: Hacked to be as static as possible

xar/build.sh

@@ -2,11 +2,48 @@
 
 pushd xar
   ./autogen.sh --noconfigure
-  # Because --disable-shared happily links to shared libs
-  rm -f "${PREFIX}"/lib/lib{xml2,bz2,z,lzma,iconv}*.dylib*
+  # Because --disable-shared happily links to shared libs:
+  # (here the xar executable dynamically links them, while
+  #  the shared library just contains undefined references)
+  rm -f "${PREFIX}"/lib/lib{xml2,bz2,z,lzma,iconv}*.dylib
   ./configure --prefix=${PREFIX}     \
               --with-lzma=${PREFIX}  \
-              --disable-shared 
+              --disable-shared       \
+              --enable-static
   make
   make install
+  # Since libxar is linked to ld64 it's imperative that we
+  # do not have any transitive static library dependencies.
+  # The reason being that these can end up as dynamic libs
+  # at the point of consumption. If this library generated
+  # .pc files and if my port of ld64 read those this would
+  # not be necessary; still it should be safe. One thing to
+  # take care about is that libcrypto.dylib is needed and
+  # we want that to come from a 10.9 sysroot and not from
+  # a conda openssl package. The way to ensure this happens
+  # is by linking to '/usr/lib/libcrypto.dylib' directly,
+  # instead of using '-L/usr/lib -lcrypto'
+  declare -a _statics
+  _statics+=(libxar.a)
+  _statics+=(libxml2.a)
+  _statics+=(libz.a)
+  _statics+=(liblzma.a)
+  _statics+=(libiconv.a)
+  _statics+=(libbz2.a)
+  mkdir -p tmp_reform
+  pushd tmp_reform
+    for _static in "${_statics[@]}"; do
+      _full_a=${PREFIX}/lib/${_static}
+      if [[ ! -e ${_full_a} ]]; then
+         echo "${_full_a} does not exist"
+         ls $(dirname ${_full_a})/*.a
+         exit 1
+      fi
+      ar -x ${_full_a}
+    done
+    [[ -f ../libxar.a ]] && rm -rf ../libxar.a
+    ar crv ../libxar.a *.o
+  popd
+  ranlib libxar.a
+  cp -f libxar.a ${PREFIX}/lib
 popd

xar/meta.yaml

@@ -4,6 +4,7 @@
 # of it, not this fork. Still, it should work OK. We do not need lzma and
 # may not even need bzip2 nor libxml2 however the build system ignores
 # --without-lzma (and probably the others too) and finds system libraries.
+# Also, I link the transitive static libraries into libxar.
 
 package:
   name: xar
@@ -31,7 +32,11 @@ about:
     A fork/clone of the subversion xar repository from
     http://xar.googlecode.com/svn/ that includes several
     enhancements and bug fixes including very basic command
-    line signature support (master branch).
+    line signature support. This is not a general purpose
+    package and exists only as a dependency for ld64. As
+    such, on Darwin, it is entirely statically linked, except
+    for libcrypto, which you must ensure gets resolved to
+    /usr/lib/libcrypto.dylib when this library is consumed.
   doc_url: http://mackyle.github.io/xar/xar.html
   doc_source_url: https://raw.githubusercontent.com/mackyle/xar/master/xar/xar.spec.in
   dev_url: https://github.com/mackyle/xar