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From: "izamyatin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/52241] Performance degradation of 447.dealII on corei7 at spec2006_base32.
Date: Sun, 19 Feb 2012 19:14:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52241

--- Comment #16 from Igor Zamyatin <izamyatin at gmail dot com> 2012-02-19 18:58:41 UTC ---
Jakub, could you please clarify your statement - "But libstdc++.so.6's tree.cc
has been compiled with
-fPIC -DPIC before Benjamin's change and is compiled with those flags after
those changes as well"

Compiler logs show somwhat opposite to this statement:

Before Benjamin's commit libtool is called without -prefer-pic:

/bin/sh ../libtool --tag CXX   --mode=compile .... -fno-implicit-templates
-Wall -Wextra -Wwrite-strings -Wcast-qual  -fdiagnostics-show-location=once
-Wabi  -ffunction-sections -fdata-sections  -frandom-seed=tree.lo -g -O2
-D_GNU_SOURCE -c -o tree.lo ../../../../libstdc++-v3/src/tree.cc

and then 

libtool: compile:  /export/users/izamyati/....././gcc/xgcc .... 
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual
-fdiagnostics-show-location=once -Wabi -ffunction-sections -fdata-sections
-frandom-seed=tree.lo -g -O2 -D_GNU_SOURCE -c
../../../../libstdc++-v3/src/tree.cc -o tree.o >/dev/null 2>&1.

But in the same time there is the following

libtool: compile:  /export/users/izamyati/....././gcc/xgcc ....
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual
-fdiagnostics-show-location=once -Wabi -ffunction-sections -fdata-sections
-frandom-seed=tree.lo -g -O2 -D_GNU_SOURCE -c
../../../../libstdc++-v3/src/tree.cc  -fPIC -DPIC -o .libs/tree.o   which is
absent after Benjamin's commit.

Does all this mean that actually tree.cc compiled with fPIC?