Reduce the size of a release test_shell from 18mb to 13mb.

build/SConscript.main

Index: build/SConscript.main
diff --git a/build/SConscript.main b/build/SConscript.main
index 35ee04efc8852691fee704130ea0b3a50263c6d9..15865ce97d4e51be17eb32ea5596095a8fb712d5 100644
--- a/build/SConscript.main
+++ b/build/SConscript.main
@@ -452,6 +452,9 @@ linux_env.Append(
         '$LIBEVENT_DIR/libevent.scons',
     ],
     CCFLAGS = ['-m32', '-pthread', '-march=i686', '-fno-exceptions'],
+    # GCC will generate ident directives with the GCC version. Accumulate
+    # these all up and you end up with ~80K repeated in a .comment section.
+    CCFLAGS_OPTIMIZED = ['-fno-ident'],
     CXXFLAGS = ['-Wall', '-Werror', '-march=i686'] + excluded_warnings,
     LINKFLAGS = ['-m32', '-pthread'],
 )
@@ -520,8 +523,12 @@ if ARGUMENTS.get('PROFILE') == '1':
   linux_env.Append(LINKFLAGS=['-pg'])
 
 # Build with symbols (useful for opt builds, for example) when SYMBOLS=1.
+# Otherwise if we're building release, strip all symbols from our output.
 if ARGUMENTS.get('SYMBOLS') == '1':
   linux_env.Append(CCFLAGS=['-g'])
+else:
+  linux_env.Append(CCFLAGS_OPTIMIZED=['-ffunction-sections', '-fdata-sections'])
+  linux_env.Append(LINKFLAGS_OPTIMIZED=['-Wl,--gc-sections', '-s'])

[Lei Zhang, 2009/01/26 22:21:23]

FYI, gold does not support --gc-sections.

 
 # Build shared libraries (useful for fast links) when SHARED=1.
 if ARGUMENTS.get('SHARED') == '1':