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targets/XSD_toolchain_gcc
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Fri, 25 May 2018 18:34:05 +0300
changeset 2168 a66062a205ae
parent 1478 69fe0b81e951
permissions -rwxr-xr-x
Build by default with optimization level -O2 for GCC

before -O0 was used by default, that caused pretty bad performance.

Amd64, i6700k, 4200MHz, GNU/Linux (non-RT kernel), gcc 7.2.0

-------------------------------------
Optimization | EN/ENO |no EN/ENO |
-------------------------------------
default | 11 | 9.5 |
-O3 | 3.9 | 5.2 |
-O2 | 4 | 4.8 |
-Os | 4.1 | 3.5 |
-Ofast | 3.9 | 5.2 |
-------------------------------------

ARM, BBB Cortex-A8, 600Mhz, GNU/Linux, gcc 4.6.3

-------------------------------------
Optimization | EN/ENO |no EN/ENO |
-------------------------------------
default | 273 | 226 |
-O3 | 141.8 | 106.2 |
-O2 | 142 | 107 |
-Os | 152.5 | 112.2 |
-Ofast | 141.7 | 106.2 |
-------------------------------------

For embedded systems with size constaints (like Cortex-Mx, AVR and so
on) I usually use -Os. It gets pretty good results. For
GNU/Linux-based systems -O2 is usually a good choice, as you see the
test results.
251
2066d2c65b71 change default linker (ld ) to g++ in XSD for gcc toolchain
greg
parents: 203
diff changeset 
     1
 












2066d2c65b71
change default linker  (ld ) to g++ in XSD for gcc toolchain



greg


parents: 
203

diff
changeset




     2


          <xsd:attribute name="Compiler" type="xsd:string" use="optional" default="gcc"/>








1478






69fe0b81e951
make attribute CFLAGS and LDFLAGS optional and add default empty value



Andrey Skvortsov <andrej.skvortzov@gmail.com>


parents: 
621

diff
changeset




     3


          <xsd:attribute name="CFLAGS" type="xsd:string" use="optional" default=""/>








621






a3ce93d63832
Default gcc toolchain config now use 'gcc' for linking. Was left accidentally to g++ since old times of wxSVG based SVGUI. Cleaned up gcc parameters when linking



Edouard Tisserant


parents: 
251

diff
changeset




     4


          <xsd:attribute name="Linker" type="xsd:string" use="optional" default="gcc"/>








1478






69fe0b81e951
make attribute CFLAGS and LDFLAGS optional and add default empty value



Andrey Skvortsov <andrej.skvortzov@gmail.com>


parents: 
621

diff
changeset




     5


          <xsd:attribute name="LDFLAGS" type="xsd:string" use="optional" default=""/>













beremiz