[jhbuild/desrt/master: 8/14] autotools: set lt_cv_sys_lib_dlsearch_path_spec

[Ryan Lortie <desrt src gnome org>]

commit 4b0061e0259305766f3219641a4da65fc74b1d6f
Author: Ryan Lortie <desrt desrt ca>
Date:   Sat Jan 17 14:49:33 2015 -0500

    autotools: set lt_cv_sys_lib_dlsearch_path_spec
    
    We can use this to override the default detected libtool runtime search
    path.
    
    This will prevent rpath from being set on account of things that are in
    jhbuild's libdir (and listed in LD_LIBRARY_PATH).
    
    We only do this on GNU ELF systems.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=668706

 jhbuild/modtypes/autotools.py |   72 ++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 71 insertions(+), 1 deletions(-)
---
diff --git a/jhbuild/modtypes/autotools.py b/jhbuild/modtypes/autotools.py
index 60aff1b..d57935b 100644
--- a/jhbuild/modtypes/autotools.py
+++ b/jhbuild/modtypes/autotools.py
@@ -20,6 +20,8 @@
 
 __metaclass__ = type
 
+import subprocess
+import sys
 import os
 import stat
 try:
@@ -219,7 +221,17 @@ class AutogenModule(MakeModule, DownloadableModule):
         except:
             pass
 
-        buildscript.execute(cmd, cwd = builddir, extra_env = self.extra_env)
+        extra_env = {}
+
+        if 'gnu-elf' in buildscript.config.conditions:
+            lt_cv_sys_lib_dlsearch_path_spec = get_lt_cv_sys_lib_dlsearch_path_spec()
+            if lt_cv_sys_lib_dlsearch_path_spec is not None:
+                extra_env['lt_cv_sys_lib_dlsearch_path_spec'] = lt_cv_sys_lib_dlsearch_path_spec
+
+        if self.extra_env:
+            extra_env.update(self.extra_env)
+
+        buildscript.execute(cmd, cwd = builddir, extra_env = extra_env)
     do_configure.depends = [PHASE_CHECKOUT]
     do_configure.error_phases = [PHASE_FORCE_CHECKOUT,
             PHASE_CLEAN, PHASE_DISTCLEAN]
@@ -432,5 +444,63 @@ def parse_autotools(node, config, uri, repositories, default_repo):
         instance.autogen_template = node.getAttribute('autogen-template')
 
     return instance
+
+def get_dlsearch_path():
+    # don't cache this -- we want it called each time just before
+    # ./configure so that it can find paths that new libraries were
+    # installed into in the meanwhile (perhaps as a result of the user
+    # installing missing dependencies)
+    result = set()
+
+    if sys.platform.startswith('linux'):
+        cmd = ['/sbin/ldconfig', '-p']
+    elif 'bsd' in sys.platform:
+        cmd = ['/sbin/ldconfig', '-r']
+    else:
+        return None
+
+    out = subprocess.check_output(cmd)
+    for line in out.splitlines():
+        if ' hwcap: ' in line:
+            continue
+
+        _, _, path = line.partition(' => ')
+
+        if path and path.startswith('/'):
+            path, _, _ = path.partition(' ')
+            path, _, _ = path.rpartition('/')
+
+            result.add(path)
+
+    # check any found directories for equivalent merged /usr symlinks
+    for item in list(result):
+        without_usr = item[4:] if item.startswith('/usr') else item
+        with_usr = '/usr' + without_usr
+
+        try:
+            a = os.stat(without_usr)
+            b = os.stat(with_usr)
+
+            if a.st_dev == b.st_dev and a.st_ino == b.st_ino:
+                result.add(without_usr)
+                result.add(with_usr)
+
+        except OSError: continue
+
+    return result
+
+def get_lt_cv_sys_lib_dlsearch_path_spec():
+    dirs = get_dlsearch_path()
+
+    if dirs is None:
+        return None
+
+    ld_library_path = os.environ.get('LD_LIBRARY_PATH', '')
+    if ld_library_path:
+        for path in ld_library_path.split(':'):
+            dirs.add(path)
+
+    return ' '.join(dirs)
+
 register_module_type('autotools', parse_autotools)