[llvm-dev] Unable to build static binary

Danie Grobbelaar via llvm-dev llvm-dev at lists.llvm.org
Mon May 10 22:05:34 PDT 2021 

Thank you for that.
Using it, I managed to get the static versions of zlib and libtinfo with
the following:
    set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
    find_package(ZLIB REQUIRED)
    find_library(TINFO "libtinfo" REQUIRED)

    target_link_libraries(prog
        PRIVATE
        clangTooling clangBasic clangASTMatchers
        -static-libgcc -static-libstdc++ -static
        ${ZLIB} ${TINFO}
    )

However I now have the issue where I can't seem to remove the link to the
dynamic versions of the libraries. Note the following output:

 /usr/bin/c++  -fPIC -fvisibility-inlines-hidden -Werror=date-time -Wall
-Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual
-Wno-missing-field-initializers -pedantic -Wno-long-long
-Wimplicit-fallthrough -Wno-maybe-uninitialized -Wno-class-memaccess
-Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type
-Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment
-fdiagnostics-color -ffunction-sections -fdata-sections -fno-common
-Woverloaded-virtual -fno-strict-aliasing -O3 -O3 -DNDEBUG
-Wl,-rpath-link,/home/danie/nett-testing/tmp/llvm-project/build/./lib
-Wl,-O3 -Wl,--gc-sections *<program files>*  -o *<output>*
-Wl,-rpath,"\$ORIGIN/../lib"  lib/libLLVMSupport.a  -lpthread
lib/libclangTooling.a  lib/libclangBasic.a  lib/libclangASTMatchers.a
-static-libgcc  -static-libstdc++  -static  */usr/lib/x86_64-linux-gnu/libz.a
/usr/lib/x86_64-linux-gnu/libtinfo.a*  lib/libclangFormat.a
lib/libclangToolingInclusions.a  lib/libclangFrontend.a
lib/libclangDriver.a  lib/libclangParse.a  lib/libclangSerialization.a
lib/libclangSema.a  lib/libclangEdit.a  lib/libclangAnalysis.a
lib/libclangASTMatchers.a  lib/libclangAST.a  lib/libclangToolingCore.a
lib/libclangRewrite.a  lib/libclangLex.a  lib/libclangBasic.a
lib/libLLVMOption.a  lib/libLLVMFrontendOpenMP.a
lib/libLLVMTransformUtils.a  lib/libLLVMAnalysis.a
lib/libLLVMProfileData.a  lib/libLLVMObject.a  lib/libLLVMBitReader.a
lib/libLLVMCore.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a
lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMDebugInfoCodeView.a
lib/libLLVMTextAPI.a  lib/libLLVMBinaryFormat.a  lib/libLLVMSupport.a
-lrt  -ldl  -lpthread  -lm  */usr/lib/x86_64-linux-gnu/libz.so
/usr/lib/x86_64-linux-gnu/libtinfo.so*  lib/libLLVMDemangle.a && :
/usr/bin/ld: attempted static link of dynamic object
`/usr/lib/x86_64-linux-gnu/libz.so'

Is there a way to let cmake know which libraries I want?

Kind regards and thank you in advance,
Danie Grobbelaar

On Tue, 11 May 2021, 10:17 Fangrui Song, <maskray at google.com> wrote:

> On 2021-05-08, Danie Grobbelaar via llvm-dev wrote:
> >I'm currently having issues trying to rebuild one of my projects with an
> >updated version of LLVM. This project generates a statically linked
> binary.
> >
> >My previous build used llvm-10.0.0 and I could build the binary without
> any
> >issues. When I checked out HEAD a few weeks ago (commit 82fbc5d) and tried
> >a build, it failed with the following linking error:
> >
> >/usr/bin/c++  -fPIC -fvisibility-inlines-hidden -Werror=date-time -Wall
> >-Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual
> >-Wno-missing-field-initializers -pedantic -Wno-long-long
> >-Wimplicit-fallthrough -Wno-maybe-uninitialized -Wno-class-memaccess
> >-Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type
> >-Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment
> >-fdiagnostics-color -ffunction-sections -fdata-sections -fno-common
> >-Woverloaded-virtual -fno-strict-aliasing -O3 -O3 -DNDEBUG  -static
> >-Wl,-rpath-link,/home/danie/nett-testing/tmp/llvm-project/build/./lib
> >-Wl,-O3 -Wl,--gc-sections *<source files>* -o *<binary name>*
> >-Wl,-rpath,"\$ORIGIN/../lib"  lib/libLLVMSupport.a  -lpthread
> >-static-libgcc  -static-libstdc++  lib/libclangTooling.a
> >lib/libclangBasic.a  lib/libclangASTMatchers.a  lib/libclangFormat.a
> >lib/libclangToolingInclusions.a  lib/libclangFrontend.a
> >lib/libclangDriver.a  lib/libclangParse.a  lib/libclangSerialization.a
> >lib/libclangSema.a  lib/libclangEdit.a  lib/libclangAnalysis.a
> >lib/libclangASTMatchers.a  lib/libclangAST.a  lib/libclangToolingCore.a
> >lib/libclangRewrite.a  lib/libclangLex.a  lib/libclangBasic.a
> >lib/libLLVMOption.a  lib/libLLVMFrontendOpenMP.a
> >lib/libLLVMTransformUtils.a  lib/libLLVMAnalysis.a
> >lib/libLLVMProfileData.a  lib/libLLVMObject.a  lib/libLLVMBitReader.a
> >lib/libLLVMCore.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a
> >lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMDebugInfoCodeView.a
> >lib/libLLVMTextAPI.a  lib/libLLVMBinaryFormat.a  lib/libLLVMSupport.a
> >-lrt  -ldl  -lpthread  -lm  /usr/lib/x86_64-linux-gnu/libz.so
> >/usr/lib/x86_64-linux-gnu/libtinfo.so  lib/libLLVMDemangle.a && :
> >/usr/bin/ld: attempted static link of dynamic object
> >`/usr/lib/x86_64-linux-gnu/libz.so'
> >
> >I haven't changed my CMakeLists.txt file, and I'm lost as to how to fix
> >this issue. Any help would be appreciated. For reference, my
> CMakeLists.txt
> >file as as follows:
> >
> >--- BEGIN CMakeLists.txt ---
> >set(LLVM_LINK_COMPONENTS support)
> >
> >add_clang_executable(mybinary
> >    <source files>
> >    )
> >
> >set (GCC_COMPILE_FLAGS "-O3")
> >set (GCC_LINK_FLAGS "-static")
> >set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GCC_COMPILER_FLAGS}")
> >set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${GCC_LINK_FLAGS}")
> >
> >target_link_libraries(mybinary
> >    PRIVATE
> >    -static-libgcc
> >    -static-libstdc++
> >    clangTooling
> >    clangBasic
> >    clangASTMatchers
> >    )
> >--- END CMakeLists.txt ---
> >
> >Kind regards and thank you in advance,
> >Danie Grobbelaar
>
> This can be an issue of the CMake module called by find_package(ZLIB)
>
> https://stackoverflow.com/questions/58347250/how-to-find-static-version-of-zlib-in-cmake
>
> As a workaround, -DLLVM_ENABLE_ZLIB=off, but some zlib features will be
> disabled (clang -gz, ld.lld's ability to read/write compressed debug
> sections).
>
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