commit e132399eb9dc93123d50e9492ac7b01c2c9a4d35
author Logan <tzuhsiang.chien@gmail.com> Wed Jan 12 04:47:13 2011 +0800
committer Logan <tzuhsiang.chien@gmail.com> Wed Jan 12 04:55:57 2011 +0800
tree 635d218f81a318beed2462e7a4ec9e5c03759c85
parent 22e8b2deb801b458cbf05f759b9e6d56909578e0

Check libbcc build time instead of sha1sum.

Since libbcc.so is larger than 3+Mb, it takes a lot of time
to calculate its sha1 checksum.  In order to shorten the startup
time, we introduce the build time check.  There will be a string
called libbcc_build_time in libbcc.so and the cached file,
which will store the build time of libbcc.so.

In case that you have to upate libbcc.so frequently, and you
want to enable the sha1 checksum of libbcc, then you may change
USE_LIBBCC_SHA1SUM to true.

lib/bcc/Script.cpp

diff --git a/lib/bcc/Script.cpp b/lib/bcc/Script.cpp
index 588906a..8fb8fd0 100644
--- a/lib/bcc/Script.cpp
+++ b/lib/bcc/Script.cpp
@@ -204,7 +204,10 @@
   CacheReader reader;
 
   // Dependencies
+#if defined(USE_LIBBCC_SHA1SUM)
   reader.addDependency(BCC_FILE_RESOURCE, pathLibBCC, sha1LibBCC);
+#endif
+
   reader.addDependency(BCC_FILE_RESOURCE, pathLibRS, sha1LibRS);
 
   if (sourceBC) {
@@ -288,7 +291,9 @@
       CacheWriter writer;
 
       // Dependencies
+#if defined(USE_LIBBCC_SHA1SUM)
       writer.addDependency(BCC_FILE_RESOURCE, pathLibBCC, sha1LibBCC);
+#endif
       writer.addDependency(BCC_FILE_RESOURCE, pathLibRS, sha1LibRS);
 
       if (sourceBC) {