ide: the attiny85 beside the atmega328p, one directory each
The presets cover both parts, so the solution should too. Studio carries avrdevice as a project property, so a part is a project rather than a configuration, and both build example/main.cpp to a .text byte-identical to their CMake counterpart: 1242 B on the mega, 1212 B on the tiny, each with the architecture its own object file says. They need separate directories, not just separate names. Studio builds into <project dir>/<Configuration> whatever OutputDirectory claims — setting it per project creates the directory and then ignores it — so two projects in one directory share example/main.o. Verified rather than assumed: with both in ide/, the single shared object read avr:25 while the mega's ELF read avr:5, so a build of one after the other without a rebuild links the wrong part's object. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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ide/atmega328p/ds3231-atmega328p.cppproj
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ide/atmega328p/ds3231-atmega328p.cppproj
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<?xml version="1.0" encoding="utf-8"?>
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<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="14.0">
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<PropertyGroup>
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<SchemaVersion>2.0</SchemaVersion>
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<ProjectVersion>7.0</ProjectVersion>
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<ToolchainName>com.Atmel.AVRGCC8.CPP</ToolchainName>
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<ProjectGuid>7b3e5a41-9c26-4d18-8f52-6a0d31c74be9</ProjectGuid>
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<avrdevice>ATmega328P</avrdevice>
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<avrdeviceseries>none</avrdeviceseries>
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<OutputType>Executable</OutputType>
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<Language>CPP</Language>
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<OutputFileName>$(MSBuildProjectName)</OutputFileName>
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<OutputFileExtension>.elf</OutputFileExtension>
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<OutputDirectory>$(MSBuildProjectDirectory)\$(Configuration)</OutputDirectory>
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<AssemblyName>ds3231-atmega328p</AssemblyName>
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<Name>ds3231-atmega328p</Name>
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<RootNamespace>ds3231</RootNamespace>
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<ToolchainFlavour>avr-g++-16.1.0</ToolchainFlavour>
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<KeepTimersRunning>true</KeepTimersRunning>
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<OverrideVtor>false</OverrideVtor>
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<CacheFlash>true</CacheFlash>
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<ProgFlashFromRam>true</ProgFlashFromRam>
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<RamSnippetAddress>0x20000000</RamSnippetAddress>
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<UncachedRange />
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<preserveEEPROM>true</preserveEEPROM>
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<OverrideVtorValue>exception_table</OverrideVtorValue>
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<BootSegment>2</BootSegment>
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<ResetRule>0</ResetRule>
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<eraseonlaunchrule>0</eraseonlaunchrule>
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<EraseKey />
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
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<ToolchainSettings>
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<AvrGccCpp>
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<avrgcc.common.Device>-mmcu=atmega328p</avrgcc.common.Device>
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<avrgcc.common.outputfiles.hex>True</avrgcc.common.outputfiles.hex>
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<avrgcc.common.outputfiles.lss>True</avrgcc.common.outputfiles.lss>
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<avrgcc.common.outputfiles.eep>True</avrgcc.common.outputfiles.eep>
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<avrgcc.common.outputfiles.srec>True</avrgcc.common.outputfiles.srec>
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<avrgcc.common.outputfiles.usersignatures>False</avrgcc.common.outputfiles.usersignatures>
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<avrgcccpp.compiler.symbols.DefSymbols>
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<ListValues>
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<Value>NDEBUG</Value>
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</ListValues>
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</avrgcccpp.compiler.symbols.DefSymbols>
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<avrgcccpp.compiler.directories.IncludePaths>
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<ListValues>
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<Value>$(MSBuildProjectDirectory)\..\..\include</Value>
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<Value>$(MSBuildProjectDirectory)\..\..\..\libavr\include</Value>
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</ListValues>
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</avrgcccpp.compiler.directories.IncludePaths>
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<avrgcccpp.compiler.optimization.level>Optimize for size (-Os)</avrgcccpp.compiler.optimization.level>
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<avrgcccpp.compiler.optimization.PrepareFunctionsForGarbageCollection>True</avrgcccpp.compiler.optimization.PrepareFunctionsForGarbageCollection>
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<avrgcccpp.compiler.optimization.PrepareDataForGarbageCollection>True</avrgcccpp.compiler.optimization.PrepareDataForGarbageCollection>
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<avrgcccpp.compiler.warnings.AllWarnings>True</avrgcccpp.compiler.warnings.AllWarnings>
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<avrgcccpp.compiler.miscellaneous.OtherFlags>-std=c++26 -Wextra -mrelax -fno-exceptions -fno-rtti -fno-threadsafe-statics</avrgcccpp.compiler.miscellaneous.OtherFlags>
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<avrgcccpp.linker.optimization.GarbageCollectUnusedSections>True</avrgcccpp.linker.optimization.GarbageCollectUnusedSections>
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<avrgcccpp.linker.miscellaneous.LinkerFlags>-mrelax</avrgcccpp.linker.miscellaneous.LinkerFlags>
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</AvrGccCpp>
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</ToolchainSettings>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
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<ToolchainSettings>
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<AvrGccCpp>
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<avrgcc.common.Device>-mmcu=atmega328p</avrgcc.common.Device>
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<avrgcc.common.outputfiles.hex>True</avrgcc.common.outputfiles.hex>
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<avrgcc.common.outputfiles.lss>True</avrgcc.common.outputfiles.lss>
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<avrgcc.common.outputfiles.eep>True</avrgcc.common.outputfiles.eep>
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<avrgcc.common.outputfiles.srec>True</avrgcc.common.outputfiles.srec>
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<avrgcc.common.outputfiles.usersignatures>False</avrgcc.common.outputfiles.usersignatures>
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<avrgcccpp.compiler.symbols.DefSymbols>
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<ListValues>
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<Value>DEBUG</Value>
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</ListValues>
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</avrgcccpp.compiler.symbols.DefSymbols>
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<avrgcccpp.compiler.directories.IncludePaths>
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<ListValues>
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<Value>$(MSBuildProjectDirectory)\..\..\include</Value>
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<Value>$(MSBuildProjectDirectory)\..\..\..\libavr\include</Value>
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</ListValues>
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</avrgcccpp.compiler.directories.IncludePaths>
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<avrgcccpp.compiler.optimization.level>Optimize debugging experience (-Og)</avrgcccpp.compiler.optimization.level>
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<avrgcccpp.compiler.optimization.PrepareFunctionsForGarbageCollection>True</avrgcccpp.compiler.optimization.PrepareFunctionsForGarbageCollection>
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<avrgcccpp.compiler.optimization.PrepareDataForGarbageCollection>True</avrgcccpp.compiler.optimization.PrepareDataForGarbageCollection>
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<avrgcccpp.compiler.warnings.AllWarnings>True</avrgcccpp.compiler.warnings.AllWarnings>
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<avrgcccpp.compiler.miscellaneous.OtherFlags>-std=c++26 -Wextra -mrelax -fno-exceptions -fno-rtti -fno-threadsafe-statics -gdwarf-4</avrgcccpp.compiler.miscellaneous.OtherFlags>
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<avrgcccpp.linker.optimization.GarbageCollectUnusedSections>True</avrgcccpp.linker.optimization.GarbageCollectUnusedSections>
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<avrgcccpp.linker.miscellaneous.LinkerFlags>-mrelax</avrgcccpp.linker.miscellaneous.LinkerFlags>
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</AvrGccCpp>
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</ToolchainSettings>
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</PropertyGroup>
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<ItemGroup>
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<Compile Include="..\..\example\main.cpp">
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<SubType>compile</SubType>
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<Link>example\main.cpp</Link>
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</Compile>
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<Compile Include="..\..\include\ds3231\ds3231.hpp">
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<SubType>compile</SubType>
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<Link>include\ds3231\ds3231.hpp</Link>
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</Compile>
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</ItemGroup>
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<ItemGroup>
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<Folder Include="example" />
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<Folder Include="include" />
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<Folder Include="include\ds3231" />
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</ItemGroup>
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<Import Project="$(AVRSTUDIO_EXE_PATH)\Vs\Compiler.targets" />
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</Project>
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