Compile Fails on MacOS 10.13.1

[YK-Unit]

Compile Fails on MacOS 10.13.1, here is the cmake log:

$ cmake ..
-- The C compiler identification is AppleClang 9.0.0.9000038
-- The CXX compiler identification is AppleClang 9.0.0.9000038
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Building without sanitizers
CMake Error at /usr/local/Cellar/cmake/3.9.3_1/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
  Could NOT find LibXml2 (missing: LIBXML2_LIBRARIES) (found version "2.9.4")
Call Stack (most recent call first):
  /usr/local/Cellar/cmake/3.9.3_1/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:377 (_FPHSA_FAILURE_MESSAGE)
  /usr/local/Cellar/cmake/3.9.3_1/share/cmake/Modules/FindLibXml2.cmake:56 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  lib/CMakeLists.txt:4 (find_package)


-- Configuring incomplete, errors occurred!
See also "/Users/York/Downloads/LibEBC/build/CMakeFiles/CMakeOutput.log".

Here is the CMakeOutput.log

[arorajatin]

+1. Facing the same issue. Tried to make it work by giving custom paths, like so,
cmake .. -DLIBXML2_INCLUDE_DIR:PATH=/usr/include/libxml2/ -DLIBXML2_LIBRARIES:PATH=/usr/local/libxml2/lib -DLLVM_DIR:PATH=/usr/local/Cellar/llvm/5.0.0/lib/cmake/llvm -DBUILD_SHARED=OFF -DBUILD_TESTING=OFF

But now it's stuck at
[ 93%] Building CXX object tool/CMakeFiles/ebcutil.dir/ebcutil.cpp.o make[2]: *** No rule to make target /usr/local/libxml2/lib', needed by tool/ebcutil'. Stop. make[1]: *** [tool/CMakeFiles/ebcutil.dir/all] Error 2 make: *** [all] Error 2

[eholley]

+2. Similar issue.

macOS 10.13.1 High Sierra
Xcode Version 9.1 (9B55)
brew installed libxml2
brew installed llvm

$git reset --hard HEAD && git pull

HEAD is now at 8f89102 Merge pull request #4 from dennisfrett/master
Already up-to-date.

$ mkdir build && cd build

$ cmake .. -DLIBXML2_INCLUDE_DIR:PATH=/usr/local/opt/libxml2/include/libxml2 -DLIBXML2_LIBRARIES:PATH=/usr/local/opt/libxml2/lib/libxml2 -DLLVM_DIR:PATH=/usr/local/opt/llvm/lib/cmake/llvm

-- The C compiler identification is AppleClang 9.0.0.9000038
-- The CXX compiler identification is AppleClang 9.0.0.9000038
-- Check for working C compiler: /Applications/Xcode910.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
-- Check for working C compiler: /Applications/Xcode910.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /Applications/Xcode910.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-- Check for working CXX compiler: /Applications/Xcode910.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Building without sanitizers
-- Found LibXml2: /usr/local/opt/libxml2/lib/libxml2 (found version "2.9.7")
-- LLVM Hint:
-- Found LLVM 5.0.0
-- Looking for xar_open in xar
-- Looking for xar_open in xar - found
-- Building with libxar: xar
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/erik/Development/LibEBC/build

$ cmake --build .

Scanning dependencies of target ebc
[ 3%] Building CXX object lib/CMakeFiles/ebc.dir/src/BinaryMetadata.cpp.o
[ 7%] Building CXX object lib/CMakeFiles/ebc.dir/src/BitcodeArchive.cpp.o
[ 11%] Building CXX object lib/CMakeFiles/ebc.dir/src/BitcodeContainer.cpp.o
[ 15%] Building CXX object lib/CMakeFiles/ebc.dir/src/BitcodeMetadata.cpp.o
[ 19%] Building CXX object lib/CMakeFiles/ebc.dir/src/BitcodeRetriever.cpp.o
[ 23%] Building CXX object lib/CMakeFiles/ebc.dir/src/EmbeddedFile.cpp.o
[ 26%] Building CXX object lib/CMakeFiles/ebc.dir/src/EmbeddedFileFactory.cpp.o
[ 30%] Building CXX object lib/CMakeFiles/ebc.dir/src/EmbeddedXar.cpp.o
[ 34%] Building CXX object lib/CMakeFiles/ebc.dir/src/util/Bitcode.cpp.o
[ 38%] Building CXX object lib/CMakeFiles/ebc.dir/src/util/MachO.cpp.o
[ 42%] Building CXX object lib/CMakeFiles/ebc.dir/src/util/UUID.cpp.o
[ 46%] Building CXX object lib/CMakeFiles/ebc.dir/src/util/Xar.cpp.o
[ 50%] Building CXX object lib/CMakeFiles/ebc.dir/src/util/Xml.cpp.o
[ 53%] Linking CXX static library libebc.a
[ 53%] Built target ebc
Scanning dependencies of target ebctest
[ 57%] Building CXX object test/CMakeFiles/ebctest.dir/src/Main.cpp.o
[ 61%] Building CXX object test/CMakeFiles/ebctest.dir/src/TestBinaryMetadata.cpp.o
[ 65%] Building CXX object test/CMakeFiles/ebctest.dir/src/TestBitcodeArchive.cpp.o
[ 69%] Building CXX object test/CMakeFiles/ebctest.dir/src/TestBitcodeContainer.cpp.o
[ 73%] Building CXX object test/CMakeFiles/ebctest.dir/src/TestBitcodeMetadata.cpp.o
[ 76%] Building CXX object test/CMakeFiles/ebctest.dir/src/TestBitcodeUtil.cpp.o
[ 80%] Building CXX object test/CMakeFiles/ebctest.dir/src/TestEmbeddedBitcode.cpp.o
[ 84%] Building CXX object test/CMakeFiles/ebctest.dir/src/TestUUID.cpp.o
[ 88%] Building CXX object test/CMakeFiles/ebctest.dir/src/TestXmlUtil.cpp.o
make[2]: *** No rule to make target /usr/local/opt/libxml2/lib/libxml2', needed by test/ebctest'. Stop.
make[1]: *** [test/CMakeFiles/ebctest.dir/all] Error 2
make: *** [all] Error 2

[andr-ggn]

Same issue

[JDevlieghere]

Can you try again after running brew link --force libxml2? That does the trick for me.

[palmerc]

So you're not using the system libxml2? Brew requires that you force it because they're reluctant to override the system libxml2

This formula is keg-only, which means it was not symlinked into /usr/local,
because macOS already provides this software and installing another version in
parallel can cause all kinds of trouble.

If you need to have this software first in your PATH run:
  echo 'export PATH="/usr/local/opt/libxml2/bin:$PATH"' >> ~/.bash_profile

For compilers to find this software you may need to set:
    LDFLAGS:  -L/usr/local/opt/libxml2/lib
    CPPFLAGS: -I/usr/local/opt/libxml2/include
For pkg-config to find this software you may need to set:
    PKG_CONFIG_PATH: /usr/local/opt/libxml2/lib/pkgconfig

The better choice during cmake configure is to pass -D options or in the file set:

 set( LIBXML2_INCLUDE_DIR /usr/local/opt/libxml2/include )
 set( LIBXML2_LIBRARIES /usr/local/opt/libxml2/lib )

[tylermilner]

I'm having the same issue as the issue author. I tried some of the work arounds that @palmerc suggested, but it's just leading me down a rabbit hole of similar errors.

[palmerc]

@tylermilner First, I'm a huge fan of rabbit holes.

Second,

MacBook-Pro:LibEBC-build palmerc$ cmake -DLIBXML2_LIBRARIES=/usr/local/opt/libxml2/lib -D LIBXML2_INCLUDE_DIR=/usr/local/opt/libxml2/include ../LibEBC
-- Building without sanitizers
-- Found LibXml2: /usr/local/opt/libxml2/lib (found version "2.9.4") 

Passing the options as I suggested, given the correct path to your libxml2, gets FindLibrary to find libxml2.

However, this project still has a number of build issues related to libxml2 which means I'll have to look at fixing it. I originally looked at this project but gave up because I was short on time.

Stuff like this is popular amongst certain developers but considered bad form in CMake:

file(GLOB_RECURSE SOURCE_FILES ${SOURCE_DIR}/*.cpp)

and mostly put me off touching it previously.

[palmerc]

So to get it to compile...

Taking a bit of deeper dive it seems that generally compiling on a Mac with Brew is problematic for this project. I had to add the following to CMakeLists.txt under lib/ and test/

set( LIBXML2_INCLUDE_DIR /usr/local/opt/libxml2/include/libxml2 )
set( ZLIB_ROOT /usr/local/opt/zlib )
# LibXml2 Dependency
find_package(LibXml2 REQUIRED
        HINTS /usr/local/opt/libxml2 )
include_directories(${LIBXML2_INCLUDE_DIR})

The issue is that there isn't a variable for LibXML2 to hint where to look. ZLIB_ROOT and LLVM_DIR both hint the location for those projects. The include directory for XML2 has an additional directory so you need to correct that.

[palmerc]

Seems that to clue CMake into the correct location and avoid adding HINTS or PATHS to the find_package command you can just do this at the command-line:

cmake -DCMAKE_PREFIX_PATH=/usr/local/opt/libxml2 ../LibEBC

[gregorymfoster]

The hints and suggestions in this thread helped me pull off a successful build on my mac - thanks guys!

[VitaliyZaharenko]

Same issue.
I had to install libxm2, zlib and llvm via homebrew
brew install libxml2 brew install zlib brew install llvm

And as suggested @palmrec had to pass CMAK_PREFIX_PATH with libxml2 and zlib, also need to specify LLVM_DIR variable

LLVM_DIR="/usr/local/Cellar/llvm/11.1.0/lib/cmake/llvm" cmake -DCMAKE_PREFIX_PATH=/usr/local/opt/libxml2 -DCMAKE_PREFIX_PATH=/usr/local/opt/zlib ..
`

OS: Big Sur 11.0.1