LTO warnings

Linux
1

Building with LTO enabled (Projucer) on Ubuntu 24.04 i got following warning:

lto-wrapper: warning: using serial compilation of 99 LTRANS jobs
lto-wrapper: note: see the ‘-flto’ option documentation for more information

gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0

2

Same thing with CMake:

– The C compiler identification is GNU 13.3.0
– The CXX compiler identification is GNU 13.3.0
– Detecting C compiler ABI info
– Detecting C compiler ABI info - done
– Check for working C compiler: /usr/bin/cc - skipped
– Detecting C compile features
– Detecting C compile features - done
– Detecting CXX compiler ABI info
– Detecting CXX compiler ABI info - done
– Check for working CXX compiler: /usr/bin/c++ - skipped
– Detecting CXX compile features
– Detecting CXX compile features - done
– Found PkgConfig: /usr/bin/pkg-config (found version “1.8.1”)
– Checking for module ‘alsa’
– Found alsa, version 1.2.11
– Checking for modules ‘freetype2;fontconfig’
– Found freetype2, version 26.1.20
– Found fontconfig, version 2.15.0
– Checking for module ‘gl’
– Found gl, version 1.2
– Checking for module ‘libcurl’
– Found libcurl, version 8.5.0
– Checking for modules ‘webkit2gtk-4.1;gtk±x11-3.0’
– Found webkit2gtk-4.1, version 2.50.4
– Found gtk±x11-3.0, version 3.24.41
– Configuring juceaide
– Building juceaide
– Exporting juceaide
– Testing juceaide
– Finished setting up juceaide
– Configuring done (119.0s)
– Generating done (0.0s)
– Build files have been written to: /home/jojo/Work/S/Spaghettis/build
[ 6%] Generating Spaghettis_artefacts/JuceLibraryCode/JuceHeader.h
[ 13%] Building CXX object CMakeFiles/Spaghettis.dir/Source/Main.cpp.o
[ 20%] Building CXX object CMakeFiles/Spaghettis.dir/JUCE/modules/juce_core/juce_core.cpp.o
[ 26%] Building CXX object CMakeFiles/Spaghettis.dir/JUCE/modules/juce_core/juce_core_CompilationTime.cpp.o
[ 33%] Building CXX object CMakeFiles/Spaghettis.dir/JUCE/modules/juce_data_structures/juce_data_structures.cpp.o
[ 40%] Building CXX object CMakeFiles/Spaghettis.dir/JUCE/modules/juce_events/juce_events.cpp.o
[ 46%] Building CXX object CMakeFiles/Spaghettis.dir/JUCE/modules/juce_graphics/juce_graphics.cpp.o
[ 53%] Building CXX object CMakeFiles/Spaghettis.dir/JUCE/modules/juce_graphics/juce_graphics_Harfbuzz.cpp.o
[ 60%] Building C object CMakeFiles/Spaghettis.dir/JUCE/modules/juce_graphics/juce_graphics_Sheenbidi.c.o
[ 66%] Building CXX object CMakeFiles/Spaghettis.dir/JUCE/modules/juce_gui_basics/juce_gui_basics.cpp.o
[ 73%] Building CXX object CMakeFiles/Spaghettis.dir/JUCE/modules/juce_gui_extra/juce_gui_extra.cpp.o
[ 80%] Building CXX object CMakeFiles/Spaghettis.dir/Libraries/spaghettis_core/spaghettis_core.cpp.o
[ 86%] Building CXX object CMakeFiles/Spaghettis.dir/Libraries/spaghettis_engine/spaghettis_engine.cpp.o
[ 93%] Building CXX object CMakeFiles/Spaghettis.dir/Libraries/spaghettis_gui/spaghettis_gui.cpp.o
[100%] Linking CXX executable Spaghettis_artefacts/Release/Spaghettis
lto-wrapper: warning: using serial compilation of 102 LTRANS jobs
lto-wrapper: note: see the ‘-flto’ option documentation for more information
[100%] Built target Spaghettis

3

Seems that it doesn’t matters < https://stackoverflow.com/a/72222512 >.