[llvm-dev] CMake build of LLVM/clang with -DCMAKE_BUILD_TYPE=Release does not create release versions?

[James Henderson via llvm-dev]

Regarding the Debug build taking hours, are you setting the optimized
tablegen option? If you aren't the Debug build will take a very long
time. In addition, make sure you have plenty of memory, because the
link stages take up a lot on Debug builds.
On Wed, 19 Sep 2018 at 10:04, Dennis Luehring via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
>
>  >because with that generator the CMAKE_BUILD_TYPE variable is ignored
>  >because it is a "multi-configuration target".
>
> thanks for the link, is that a bug in the CMake configuration (or better
> not getting any warning) or is there just documentation missing?
>
> so i can use --config Debug or --config Release and get the correct
> results - i hope that works the build takes hours
>
> strange is that -DCMAKE_BUILD_TYPE=Debug results in a different
> build-directory size compared to -DCMAKE_BUILD_TYPE=Release - so its not
> fully ignored?
>
> Am 19.09.2018 um 10:30 schrieb Boldizsar.Palotas at esa.int:
> > If I understand correctly, you need to set Release mode within the VS IDE
> > because with that generator the CMAKE_BUILD_TYPE variable is ignored
> > because it is a "multi-configuration target".
> >
> > see
> > https://stackoverflow.com/questions/24460486/cmake-build-type-not-being-used-in-cmakelists-txt
> >
> >
> >
> > From:   Dennis Luehring via llvm-dev <llvm-dev at lists.llvm.org>
> > To:     llvm-dev <llvm-dev at lists.llvm.org>
> > Date:   2018.09.19 06:11
> > Subject:        [llvm-dev] CMake build of LLVM/clang with
> > -DCMAKE_BUILD_TYPE=Release does not create release versions?
> > Sent by:        "llvm-dev" <llvm-dev-bounces at lists.llvm.org>
> >
> >
> >
> > my build environment:
> >
> > Win7 x64
> > VStudio 2017 Community Edition 15.8.4 (latest)
> > CMake 3.12.1 (x86)
> > git 2.19.0 (latest, x64)
> > Python 2.7.2 (x86)
> >
> > directory structure
> >
> > test
> >     llvm <-- git clone https://github.com/llvm-mirror/llvm
> >       tools
> >         clang <-- git clone https://github.com/llvm-mirror/clang
> >     llvm_build
> >
> > Debug build: clean build, llvm_build is deleted before
> >
> > llvm_build> cmake -Thost=x64 -G "Visual Studio 15 2017 Win64"
> > -DCMAKE_BUILD_TYPE=Debug -DLLVM_TARGETS_TO_BUILD=host
> > -DLLVM_BUILD_EXAMPLES=1 -DCLANG_BUILD_EXAMPLES=1
> > -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_DOCS=OFF ..\llvm
> >
> > builds for hours, a few warning, no errors -> llvm_build is ~44GB
> >
> > i can find many working libs/exes(also examples) in
> > llvm_build\Debug\(lib|bin)
> >
> > then i tried to build release versions
> >
> > Release build: clean build, llvm_build is deleted before
> >
> > llvm_build> cmake -Thost=x64 -G "Visual Studio 15 2017 Win64"
> > -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD=host
> > -DLLVM_BUILD_EXAMPLES=1 -DCLANG_BUILD_EXAMPLES=1
> > -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_DOCS=OFF ..\llvm
> >
> > builds for hours, a few warning, no errors -> llvm_build is ~47GB (i
> > though Release would be smaller?)
> >
> > i can find many working libs/exes(also examples) in
> > llvm_build\Debug\(lib|bin) - the executables seems to be larger as in
> > "Debug"-Build?
> >
> > llvm-build\Release\bin just contains llvm-lit.py
> >
> > why is the debug folder populated and where i can find the Release build
> > libs/exes?
> >
> >
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