Arch Linux User Repository

@Luhas On Vanilla Arch, nothing ever should be installed in /usr/local. Arch does not use /usr/local at all, especially for AUR packages.

To be clear, the output of cat install_manifest.txt was for the package built from a git clone and installed with make install, not from this PKGBUILD. I was comparing the outputs between the two installation methods (make install and AUR).

In doubt I tried again, and go figure: I deleted the package and reinstalled it with the original PKGBUILD, and now it works. Vanilla Arch, didn't have anything in my env (I just checked again to be sure). I was using yay to install the package. Seems like there were gremlins toying around my system...

I'm setting -DCMAKE_INSTALL_PREFIX=/usr, I don't know how on your system it would still go into /usr/local. Looks like a very broken system. Check what you have in your environment (set command) and your makepkg.conf. Are you using Arch or a derivative?

The current package build does build fine on my system, but the resulting package doesn't work, likely due to the files being in the wrong path.

cat install_manifest.txt
/usr/local/lib/libVkLayer_KORTHOS_LowLatency.so
/usr/local/share/vulkan/implicit_layer.d/low_latency_layer.json                                                                                                                                                                                                                                                             

It works if I modify the PKGBUILD as such, adding -DCMAKE_INSTALL_LIBDIR=lib :

cmake -S "${_srcdir}" -B build \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_CXX_FLAGS_RELEASE='-DNDEBUG' \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_INSTALL_LIBDIR=lib

The current package build does build fine on my system, but the resulting package doesn't work, likely due to the files being in the wrong path.

cat install_manifest.txt
/usr/local/lib/libVkLayer_KORTHOS_LowLatency.so
/usr/local/share/vulkan/implicit_layer.d/low_latency_layer.json                                                                                                                                                                                                                                                             

It works if I modify the PKGBUILD as such, adding -DCMAKE_INSTALL_LIBDIR=lib :

cmake -S "${_srcdir}" -B build \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_CXX_FLAGS_RELEASE='-DNDEBUG' \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_INSTALL_LIBDIR=lib

I've compared the builds with and without glslang and shaderc and there is no difference.

(Sorry for the spam comments). While not a strict makedepends, whenever I build this package in extra-x86-64-build -c in a clean chroot, CMake says:

-- Found Vulkan: /usr/lib/libvulkan.so (found version "1.4.350")  missing components: glslc glslangValidator

Therefore, I think glslang and shaderc should be added to makedepends().

diff --git a/PKGBUILD b/PKGBUILD
index 7797cae..6a6c5e1 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -7,7 +7,7 @@ pkgdesc='Implicit Vulkan layer that reduces click-to-photon latency for AMD and
 url="https://github.com/Korthos-Software/low_latency_layer/"
 license=('MIT')
 depends=('libstdc++' 'glibc' 'libgcc')
-makedepends=('cmake' 'vulkan-headers' 'vulkan-utility-libraries')
+makedepends=('cmake' 'vulkan-headers' 'vulkan-utility-libraries' 'shaderc' 'glslang')
 arch=('x86_64')
 sha256sums=('425f673fb7cd238231004b2cd39eb5db320c8cac9560b5fcafc99d8a36702fed')
 source=("$pkgname-$pkgver.tar.gz::${url}/archive/refs/tags/v${pkgver}.tar.gz")

I think you should add it. It's something I do in all of my packages that have this issue. And, if you think about it, this flag is automatically added whenever this software is compiled with the Release profile. But, that's just my two cents 🐥🐥🐥

It's not clear if I should set it here. From the wiki, they mention the issue but don't mention if I should add the flag. Personally I set it in my makepkg.conf.

@patlefort Thank you for accepting my suggestions! I got one more (lol). I suggest to add -DNDEBUG to -DCMAKE_CXX_FLAGS="${CXXFLAGS} -DNDEBUG" so that there are no references to the build directory left in the built binary (the warning you get when the package is compressed):

diff --git a/PKGBUILD b/PKGBUILD
index 7797cae..a458c29 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -15,7 +15,8 @@ source=("$pkgname-$pkgver.tar.gz::${url}/archive/refs/tags/v${pkgver}.tar.gz")
 _srcdir="low_latency_layer-$pkgver"

 build() {
-   cmake -S "${_srcdir}" -B build -DCMAKE_BUILD_TYPE=None -DCMAKE_INSTALL_PREFIX=/usr
+   cmake -S "${_srcdir}" -B build -DCMAKE_BUILD_TYPE=None -DCMAKE_INSTALL_PREFIX=/usr \
+   -DCMAKE_CXX_FLAGS="${CXXFLAGS} -DNDEBUG"
    cmake --build build
 }