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Today's Topics:
1. Stripping -O2 from debug builds (Dmitriy Purgin)
----------------------------------------------------------------------
Message: 1
Date: Sun, 29 Mar 2015 00:30:55 +0600
From: Dmitriy Purgin <[email protected]>
To: Sailfish OS Developers <[email protected]>
Subject: [SailfishDevel] Stripping -O2 from debug builds
Message-ID:
<ca+y33ytd9rirqmbwgzmaqfwheqaffw+o5smz8ajj821dlte...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi all,
is there any way to prevent optimization switch -O2 being set when Makefile
is generated for debug builds? I've looked into linux-g++-32 and its
includes of Mer SDK but didn't find any clues regarding why -O2 is set for
debug build. This switch as well as -g are nicely managed by
QMAKE_CXXFLAGS_RELEASE and QMAKE_CXXFLAGS_DEBUG (-O2 appears in former, -g
appears in latter) but for some reason they both end up in the command line
of actual compilation. I've grepped everything in mkspecs directory
recursively but it seems like -O2 and -g are always divided into _RELEASE
and _DEBUG respectively.
Then I've added -d switch to qmake call on the Project page of
sailfish-qtcreator and after parsing default_pre.prf it outputs the
following lines:
DEBUG 1: (command line):65535: QMAKE_CFLAGS_RELEASE := -O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
--param=ssp-buffer-size=4 -Wformat -Wformat-security -m32 -march=i486
-fasynchronous-unwind-tables
DEBUG 1: (command line):65535: QMAKE_CFLAGS_DEBUG := -O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
--param=ssp-buffer-size=4 -Wformat -Wformat-security -m32 -march=i486
-fasynchronous-unwind-tables
does that mean that both -O2 and -g are forced somewhere in Salifish SDK
tools when calling qmake? Is there any way to turn off -O2 for debug builds?
Cheers
Dmitriy Purgin
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