Arch Linux User Repository

An update as to what to do to build with a local copy of llvm15.
- As of zig 0.10.0-dev.4333+f5f28e0d2 the patch from 12888 is no longer required.
- The commit still needs to be removed from the PKGBUILD.
- With llvm 15.0.2 you need to add -DLLVM_USE_STATIC_ZSTD=ON to the llvm make command shown below.

The package build has been updated to build the last version of zig that builds with llvm 14. If you want to build master, in addition to changes I posted below, you now need to remove the #commit=e2bb92b2e27dc54852a0227345e294ae383358fd from the source.

source=("git+https://github.com/ziglang/zig.git#commit=e2bb92b2e27dc54852a0227345e294ae383358fd")

Zig updated to llvm15. Looks like Arch is taking time to integrate llvm15. I my opinion creating a local copy of llvm is the way to go. This is what I use:

cd ~/llvm
git clone --depth 1 --branch release/15.x https://github.com/llvm/llvm-project llvm-project-15
cd llvm-project-15
git checkout release/15.x
mkdir build
cd build
make ../llvm -DCMAKE_INSTALL_PREFIX=$HOME/local/llvm15 -DCMAKE_PREFIX_PATH=$HOME/local/llvm15 -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_PROJECTS="lld;clang" -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_TERMINFO=OFF  -DLL
VM_ENABLE_LIBEDIT=OFF  -DLLVM_ENABLE_ASSERTIONS=ON  -G Ninja  -DLLVM_PARALLEL_LINK_JOBS=1 -DLLVM_ENABLE_BINDINGS=OFF
ninja install

Read zig issue 12888: https://github.com/ziglang/zig/issues/12888 and manually update the PKGBUILD as per the issue. I use:

PATH=$HOME/local/llvm15:$PATH yay -S --editmenu zig-git

I can't build it, because zig need llvm 15 (not 14)

@edtoml Updated. It should work now.

With the latest changes to the Zig build process the PKGBUILD no longer works. Problem is that the "cmake --build build" attempts to write directly to /usr/lib. The last part of the build uses zig (stage2) and wants to use -DCMAKE_INSTALL_PREFIX=/usr as written when building stage3. This is the second version of this PKGBUILD.

https://zigbin.io/bdc712

build() {
    cmake -B build -S zig \
        -DCMAKE_BUILD_TYPE=None \
        -DCMAKE_INSTALL_PREFIX=../stage3 \
        -DZIG_PREFER_CLANG_CPP_DYLIB=ON \
        -DZIG_STATIC_ZLIB=on
    cmake --build build
}

check() {
    # omit full compiler test since it takes ages
    ../stage3/bin/zig version
}

package() {
    mv ../stage3 "$pkgdir/usr"
    install -Dm644 zig/LICENSE "$pkgdir/usr/share/licenses/$provides/LICENSE"
}

Your mileage may vary

This builds w/ LLVM 14 for me now but I had to add -DZIG_STATIC_ZLIB=on as mentioned here https://github.com/ziglang/zig/issues/12069#issuecomment-1179757906

Diff for the below from kuon. I do not have push permissions here anymore so cannot update.

diff --git a/.SRCINFO b/.SRCINFO
index c38f9af..f3a7998 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,16 +1,16 @@
 pkgbase = zig-git
    pkgdesc = a programming language prioritizing robustness, optimality, and clarity
    pkgver = 0.9.0
-   pkgrel = 1
+   pkgrel = 2
    url = https://ziglang.org
    arch = i686
    arch = x86_64
    license = MIT
    makedepends = cmake
    makedepends = git
-   depends = clang
-   depends = llvm>=13
-   depends = lld
+   depends = clang13
+   depends = llvm13
+   depends = lld13
    provides = zig
    conflicts = zig
    source = git+https://github.com/ziglang/zig.git
diff --git a/PKGBUILD b/PKGBUILD
index 2d6a016..8f40a5a 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -2,12 +2,12 @@

 pkgname=zig-git
 pkgver=0.9.0
-pkgrel=1
+pkgrel=2
 pkgdesc="a programming language prioritizing robustness, optimality, and clarity"
 arch=('i686' 'x86_64')
 url='https://ziglang.org'
 license=('MIT')
-depends=('clang' 'llvm>=13' 'lld')
+depends=('clang13' 'llvm13' 'lld13')
 makedepends=('cmake' 'git')
 provides=(zig)
 conflicts=(zig)
@@ -22,7 +22,11 @@ build() {
     cmake -B build -S zig \
     -DCMAKE_BUILD_TYPE=None \
     -DCMAKE_INSTALL_PREFIX=/usr \
-        -DZIG_PREFER_CLANG_CPP_DYLIB=ON
+        -DZIG_PREFER_CLANG_CPP_DYLIB=ON \
+        -DLLVM_CONFIG_EXE=/usr/lib/llvm13/bin/llvm-config \
+        -DCMAKE_C_FLAGS="-I/usr/lib/llvm13/include/" \
+        -DCMAKE_CXX_FLAGS="-I/usr/lib/llvm13/include/" \
+        -DCMAKE_EXE_LINKER_FLAGS="-L/usr/lib/llvm13/lib/"
     cmake --build build
 }

I just update arch, and now it doesn't build with the following error:

-- Configuring zig version 0.10.0-dev.2855+aab1284e1
CMake Error at cmake/Findllvm.cmake:70 (message):
  expected LLVM 13.x but found 14.0.6 using /usr/bin/llvm-config
Call Stack (most recent call first):
  CMakeLists.txt:107 (find_package)

It can be fixed with:

 pacman -S llvm13 clang13 lld13

And add to PKGBUILD

    -DLLVM_CONFIG_EXE=/usr/lib/llvm13/bin/llvm-config \
    -DCMAKE_C_FLAGS="-I/usr/lib/llvm13/include/" \
    -DCMAKE_CXX_FLAGS="-I/usr/lib/llvm13/include/" \
    -DCMAKE_EXE_LINKER_FLAGS="-L/usr/lib/llvm13/lib/" \

to the cmake call (first one)

Currently the latest master commit will not build because of Zig issue #11137. Essentially Zig does not link to c_nonshared, although that is needed on recent version of Arch.

Here is an example of a compilation failure on latest master: Github Gist Several other examples of compilation failure are available on the issue.

PR #11529 provides a simple (but hacky) fix to the solution.

You should patch it until upstream adds a proper fix.