mklibs: fix some long standing libpthread symbol link issues, mostly related to weak function overrides between libgcc, libc and libpthread

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25795 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 63 insertions, 0 deletions

diff --git a/tools/mklibs/patches/010-uclibc_libpthread_symbols.patch b/tools/mklibs/patches/010-uclibc_libpthread_symbols.patch
new file mode 100644
index 0000000000..0c97216d1a
--- /dev/null
+++ b/tools/mklibs/patches/010-uclibc_libpthread_symbols.patch
@@ -0,0 +1,63 @@
+--- a/src/mklibs.py
++++ b/src/mklibs.py
+@@ -161,9 +161,10 @@ def undefined_symbols(obj):
+     return result
+ 
+ class ProvidedSymbol(Symbol):
+-    def __init__(self, name, version, library, default_version):
++    def __init__(self, name, version, library, default_version, weak):
+         super(ProvidedSymbol, self).__init__(name, version, library)
+         self.default_version = default_version
++        self.weak = weak
+ 
+     def base_names(self):
+         ret = []
+@@ -204,11 +205,15 @@ def provided_symbols(obj):
+         if version_string.lower() not in ('base', 'none'):
+             version = version_string
+ 
++        weak = False
++        if weak_string.lower() == 'true':
++            weak = True
++
+         default_version = False
+         if default_version_string.lower() == 'true':
+             default_version = True
+ 
+-        result.append(ProvidedSymbol(name, version, library, default_version))
++        result.append(ProvidedSymbol(name, version, library, default_version, weak))
+ 
+     return result
+     
+@@ -476,6 +481,9 @@ while 1:
+             debug(DEBUG_SPAM, "present_symbols adding %s" % symbol)
+             names = symbol.base_names()
+             for name in names:
++                if name in present_symbols:
++                    if symbol.library != present_symbols[name].library:
++                        needed_symbols[name] = UndefinedSymbol(name, True, symbol.version, symbol.library)
+                 present_symbols[name] = symbol
+ 
+     # are we finished?
+@@ -567,12 +575,16 @@ while 1:
+                 # may segfault in ptmalloc_init due to undefined weak reference
+                 extra_pre_obj.append(sysroot + libc_extras_dir + "/soinit.o")
+                 extra_post_obj.append(sysroot + libc_extras_dir + "/sofini.o")
+-                symbols.add(ProvidedSymbol('__dso_handle', None, None, True))
++                symbols.add(ProvidedSymbol('__dso_handle', None, None, True, True))
+ 
+-            if soname in ("libc.so.0"):
+-                symbols.add(ProvidedSymbol('__uClibc_init', None, None, True))
+-                symbols.add(ProvidedSymbol('__uClibc_fini', None, None, True))
+-                extra_flags.append("-Wl,-init,__uClibc_init")
++            if soname == "libc.so.0":
++                symbols.add(ProvidedSymbol('__uClibc_init', None, None, True, True))
++                symbols.add(ProvidedSymbol('__uClibc_fini', None, None, True, True))
++                extra_pre_obj.append("-Wl,-init,__uClibc_init")
++
++            if soname == "libpthread.so.0":
++                symbols.add(ProvidedSymbol('__pthread_initialize_minimal_internal', None, None, True, True))
++                extra_flags.append("-Wl,-z,nodelete,-z,initfirst,-init=__pthread_initialize_minimal_internal")
+ 
+             map_file = find_pic_map(library)
+             if map_file: