Support passing --library=lib<foo>.la

In addition to the current --library=<foo>, support --library=lib<foo>.la.
This makes it unambiguous that we are referencing an uninstalled
library and allows accurate extraction of the shared library name
for the uninstalled library.

* tests/scanner/Makefile.am tests/offsets/Makefile.am: Use the
  new form of --library=. Also some LD_LIBRARY_PATH frobbing as needed.

*-expected.gir *-expected.tgir: We now pick out the shared library
  accurately, so fix shared-library="" in our reference girs. (The
  comparison may need some pre-sanitization now to work on non-ELF)

http://bugzilla.gnome.org/show_bug.cgi?id=591669

1 files changed, 27 insertions, 5 deletions

diff --git a/giscanner/utils.py b/giscanner/utils.py
index 3a26a1ee..29a55609 100644
--- a/giscanner/utils.py
+++ b/giscanner/utils.py
@@ -20,6 +20,7 @@
 
 import re
 import os
+import subprocess
 
 # Copied from h2defs.py
 _upperstr_pat1 = re.compile(r'([^A-Z])([A-Z])')
@@ -46,12 +47,33 @@ def to_underscores_noprefix(name):
 
 _libtool_pat = re.compile("dlname='([A-z0-9\.\-\+]+)'\n")
 
+def _extract_dlname_field(la_file):
+    f = open(la_file)
+    data = f.read()
+    f.close()
+    m = _libtool_pat.search(data)
+    if m:
+        return m.groups()[0]
+    else:
+        return None
+
+# Returns the name that we would pass to dlopen() the library
+# corresponding to this .la file
+def extract_libtool_shlib(la_file):
+    dlname = _extract_dlname_field(la_file)
+    if dlname is None:
+        return None
+
+    # From the comments in extract_libtool(), older libtools had
+    # a path rather than the raw dlname
+    return os.path.basename(dlname)
 
-def extract_libtool(libname):
-    data = open(libname).read()
-    filename = _libtool_pat.search(data).groups()[0]
-    libname = os.path.join(os.path.dirname(libname),
-                           '.libs', filename)
+def extract_libtool(la_file):
+    dlname = _extract_dlname_field(la_file)
+    if dlname is None:
+        raise ValueError("%s has no dlname. Not a shared library?" % la_file)
+    libname = os.path.join(os.path.dirname(la_file),
+                           '.libs', dlname)
     # FIXME: This hackish, but I'm not sure how to do this
     #        in a way which is compatible with both libtool 2.2
     #        and pre-2.2. Johan 2008-10-21