[tor-commits] [flashproxy/master] Add (commented) GOBUILDFLAGS to use gccgo.

[dcf@xxxxxxxxxxxxxx]

commit 5ab48ddf22fa2123e43e285133b1383cc38dfda5
Author: David Fifield <david@xxxxxxxxxxxxxxx>
Date:   Wed Nov 28 10:28:41 2012 -0800

    Add (commented) GOBUILDFLAGS to use gccgo.
    
    gccgo allows me to build for x86 from x86_64, which I can't figure out
    how to do with the standard golang package on Debian. This requires the
    gccgo-multilib package for the -m32 option. Also add the -static-libgo
    option, otherwise I get
    	./websocket-server: error while loading shared libraries: libgo.so.0: cannot open shared object file: No such file or directory
    when running on a different machine. The rest of the program remains
    dynamically linked. Using plain -static doesn't seem like a good idea:
    	/usr/lib/gcc/x86_64-linux-gnu/4.7/32/libgo.a(net.o): In function `net.cgoLookupIPCNAME':
    	(.text+0x11893): warning: Using 'getaddrinfo' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
    
    gccgo probably gives us better optimization; with -O3 it at least seems
    to inline and do something clever with the applyMask function, which
    historically has been the bottleneck in the Python WebSocket
    implementation.
---
 websocket-transport/Makefile |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/websocket-transport/Makefile b/websocket-transport/Makefile
index b4e02e1..ac6fa08 100644
--- a/websocket-transport/Makefile
+++ b/websocket-transport/Makefile
@@ -4,6 +4,10 @@ BINDIR = $(PREFIX)/bin
 PROGRAMS = websocket-client websocket-server
 
 GOBUILDFLAGS =
+# Alternate flags to use gccgo, allowing cross-compiling for x86 from
+# x86_64, and presumably better optimization. Install this package:
+#   apt-get install gccgo-multilib
+# GOBUILDFLAGS = -compiler gccgo -gccgoflags "-O3 -m32 -static-libgo"
 
 all: websocket-server
 



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