[Interest] Compiler optimisation flags on Android

[Nuno Santos]

I mean -O2, like the others

Nuno Santos
Founder / CEO / CTO
www.imaginando.pt
+351 91 621 69 62

> On 03 May 2016, at 06:27, Thiago Macieira <thiago.macieira at intel.com> wrote:
> 
> On segunda-feira, 2 de maio de 2016 22:07:03 PDT Nuno Santos wrote:
>> Hi,
>> 
>> Below are the CFLAGS for Android
>> (Qt/5.6/android_armv7/mkspecs/android-g++/qmake.conf)
>> 
>> I’m wondering why there are no optimisation settings for arm rather than
>> size. Is there any specific reason?
> 
> Why should there be?
> 
>> } else { # arm
>>    QMAKE_CFLAGS_RELEASE                   = -Os -fomit-frame-pointer
>> -fno-strict-aliasing -finline-limit=64 
>>    QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO   = -g -Os -fomit-frame-pointer 
>>    -fno-strict-aliasing -finline-limit=64
>>    QMAKE_CFLAGS_DEBUG                     = -g -marm -O0 -fno-omit-frame-
>>    pointer 
>>    equals(ANDROID_TARGET_ARCH, armeabi):if(equals(NDK_TOOLCHAIN_VERSION,
>> 4.8)|equals(NDK_TOOLCHAIN_VERSION, 4.9)) {
>>        DEFINES += QT_OS_ANDROID_GCC_48_WORKAROUND
>>    } else {
>>        QMAKE_CFLAGS_RELEASE += -mthumb
>>        QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += -mthumb
>>    }
>> }
> 
> This section you pasted contradicts your statement. There are more 
> optimisation flags besides -Os.
> 
> -- 
> Thiago Macieira - thiago.macieira (AT) intel.com
>  Software Architect - Intel Open Source Technology Center
> 
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