Applying patch by Neal Norwitz:

niemeyer · niemeyer · commit 7628f1ffff2e · 2003-04-27T06:25:24.000Z
[#727759] get bzip2 to build on Solaris 8 (old bzip library)
diff --git a/Modules/bz2module.c b/Modules/bz2module.c
@@ -31,6 +31,9 @@ static char __author__[] =
 
 #define BZ2FileObject_Check(v)	((v)->ob_type == &BZ2File_Type)
 
+
+#ifdef BZ_CONFIG_ERROR
+
 #if SIZEOF_LONG >= 8
 #define BZS_TOTAL_OUT(bzs) \
 	(((long)bzs->total_out_hi32 << 32) + bzs->total_out_lo32)
@@ -42,6 +45,26 @@ static char __author__[] =
 	bzs->total_out_lo32;
 #endif
 
+#else /* ! BZ_CONFIG_ERROR */
+
+#define BZ2_bzRead bzRead
+#define BZ2_bzReadOpen bzReadOpen
+#define BZ2_bzReadClose bzReadClose
+#define BZ2_bzWrite bzWrite
+#define BZ2_bzWriteOpen bzWriteOpen
+#define BZ2_bzWriteClose bzWriteClose
+#define BZ2_bzCompress bzCompress
+#define BZ2_bzCompressInit bzCompressInit
+#define BZ2_bzCompressEnd bzCompressEnd
+#define BZ2_bzDecompress bzDecompress
+#define BZ2_bzDecompressInit bzDecompressInit
+#define BZ2_bzDecompressEnd bzDecompressEnd
+
+#define BZS_TOTAL_OUT(bzs) bzs->total_out
+
+#endif /* ! BZ_CONFIG_ERROR */
+
+
 #ifdef WITH_THREAD
 #define ACQUIRE_LOCK(obj) PyThread_acquire_lock(obj->lock, 1)
 #define RELEASE_LOCK(obj) PyThread_release_lock(obj->lock)
@@ -117,12 +140,14 @@ Util_CatchBZ2Error(int bzerror)
 		case BZ_STREAM_END:
 			break;
 
+#ifdef BZ_CONFIG_ERROR
 		case BZ_CONFIG_ERROR:
 			PyErr_SetString(PyExc_SystemError,
 					"the bz2 library was not compiled "
 					"correctly");
 			ret = 1;
 			break;
+#endif
 
 		case BZ_PARAM_ERROR:
 			PyErr_SetString(PyExc_ValueError,
