[meta-oe] fex: add recipe

Fex is a fast usermode x86 and x86-64 emulator for Arm64 Linux
It is used by 'valve' to run windows games on snapdragon

Compilation requires TOOLCHAIN = "clang"

Signed-off-by: Markus Volk <f_l_k@t-online.de>
---
 meta-oe/recipes-devtools/fex/fex_2511.bb | 58 ++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 meta-oe/recipes-devtools/fex/fex_2511.bb

On Thu, Nov 13, 2025 at 6:05 PM Markus Volk via lists.openembedded.org
<f_l_k=t-online.de@lists.openembedded.org> wrote:

> Fex is a fast usermode x86 and x86-64 emulator for Arm64 Linux
> It is used by 'valve' to run windows games on snapdragon
>
> Compilation requires TOOLCHAIN = "clang"
>
> Signed-off-by: Markus Volk <f_l_k@t-online.de>
> ---
>  meta-oe/recipes-devtools/fex/fex_2511.bb | 58 ++++++++++++++++++++++++
>  1 file changed, 58 insertions(+)
>  create mode 100644 meta-oe/recipes-devtools/fex/fex_2511.bb
>
> diff --git a/meta-oe/recipes-devtools/fex/fex_2511.bb
> b/meta-oe/recipes-devtools/fex/fex_2511.bb
> new file mode 100644
> index 0000000000..295df8e814
> --- /dev/null
> +++ b/meta-oe/recipes-devtools/fex/fex_2511.bb
> @@ -0,0 +1,58 @@
> +SUMMARY = "A fast usermode x86 and x86-64 emulator for Arm64 Linux"
> +HOMEPAGE = "https://github.com/FEX-Emu/FEX"
> +LICENSE = "MIT & BSL-1.0 & BSD-2-Clause"
> +LIC_FILES_CHKSUM = "file://LICENSE;md5=70d20d502833c35d6d5a4f0ef5d9efcc"
> +LIC_FILES_CHKSUM +=
> "file://External/range-v3/LICENSE.txt;md5=5dc23d5193abaedb6e42f05650004624"
> +LIC_FILES_CHKSUM +=
> "file://External/xxhash/LICENSE;md5=13be6b481ff5616f77dda971191bb29b"
> +
> +COMPATIBLE_HOST = "aarch64.*-linux"
> +
> +REQUIRED_DISTRO_FEATURES = "ld-is-lld"
> +
>

You. can just add LDFLAGS += "-fuse-ld=lld" instead of demanding the distro
feature
that will make it work with wider variety of distro settings, not many OE
distros default to LLD yet.


> +SRC_URI = " \
> +       git://
> github.com/FEX-Emu/FEX.git;name=fex;protocol=https;nobranch=1;tag=FEX-${PV}
> <http://github.com/FEX-Emu/FEX.git;name=fex;protocol=https;nobranch=1;tag=FEX-$%7BPV%7D>
> \
> +       git://
> github.com/Sonicadvance1/cpp-optparse.git;name=cpp-optparse;subdir=${S}/Source/Common/cpp-optparse;protocol=https;nobranch=1
> <http://github.com/Sonicadvance1/cpp-optparse.git;name=cpp-optparse;subdir=$%7BS%7D/Source/Common/cpp-optparse;protocol=https;nobranch=1>
> \
> +       git://
> github.com/FEX-Emu/drm-headers.git;name=fex-drm;subdir=${S}/External/drm-headers;protocol=https;nobranch=1
> <http://github.com/FEX-Emu/drm-headers.git;name=fex-drm;subdir=$%7BS%7D/External/drm-headers;protocol=https;nobranch=1>
> \
> +       git://
> github.com/Cyan4973/xxHash.git;name=xxhash;subdir=${S}/External/xxhash;protocol=https;nobranch=1
> <http://github.com/Cyan4973/xxHash.git;name=xxhash;subdir=$%7BS%7D/External/xxhash;protocol=https;nobranch=1>
> \
> +       git://
> github.com/FEX-Emu/jemalloc.git;name=jemalloc;subdir=${S}/External/jemalloc;protocol=https;nobranch=1
> <http://github.com/FEX-Emu/jemalloc.git;name=jemalloc;subdir=$%7BS%7D/External/jemalloc;protocol=https;nobranch=1>
> \
> +       git://
> github.com/FEX-Emu/jemalloc.git;name=jemalloc-glibc;subdir=${S}/External/jemalloc_glibc;protocol=https;nobranch=1
> <http://github.com/FEX-Emu/jemalloc.git;name=jemalloc-glibc;subdir=$%7BS%7D/External/jemalloc_glibc;protocol=https;nobranch=1>
> \
> +       git://
> github.com/ericniebler/range-v3.git;name=range-v3;subdir=${S}/External/range-v3;protocol=https;nobranch=1
> <http://github.com/ericniebler/range-v3.git;name=range-v3;subdir=$%7BS%7D/External/range-v3;protocol=https;nobranch=1>
> \
> +       git://
> github.com/FEX-Emu/robin-map.git;name=robin-map;subdir=${S}/External/robin-map;protocol=https;nobranch=1
> <http://github.com/FEX-Emu/robin-map.git;name=robin-map;subdir=$%7BS%7D/External/robin-map;protocol=https;nobranch=1>
> \
> +"
> +
> +SRCREV_FORMAT = "fex"
> +SRCREV_fex = "663fd5a98befbf7a0ac585627de15c662715a731"
> +SRCREV_cpp-optparse = "9f94388a339fcbb0bc95c17768eb786c85988f6e"
> +SRCREV_fex-drm = "3e49836995c1dcb3df709440ad2f270b569c6a5f"
> +SRCREV_xxhash = "e626a72bc2321cd320e953a0ccf1584cad60f363"
> +SRCREV_jemalloc = "ce24593018ca5d5af7e5661ceda9744e02b59f8f"
> +SRCREV_jemalloc-glibc = "8436195ad5e1bc347d9b39743af3d29abee59f06"
> +SRCREV_robin-map = "d5683d9f1891e5b04e3e3b2192b5349dc8d814ea"
> +SRCREV_range-v3 = "ca1388fb9da8e69314dda222dc7b139ca84e092f"
> +
> +DEPENDS = " \
> +    catch2 \
> +    fmt \
> +    libdrm  \
> +    nasm-native \
> +    vulkan-headers \
> +"
> +
> +PACKAGECONFIG = ""
> +PACKAGECONFIG[qt] = "-DBUILD_FEXCONFIG=ON,-DBUILD_FEXCONFIG=OFF,qtbase
> qttools-native qtquick3d"
> +
> +EXTRA_OECMAKE += " \
> +       -DBUILD_TESTING=OFF \
> +       -DENABLE_VIXL_DISASSEMBLER=OFF \
> +       -DENABLE_VIXL_SIMULATOR=OFF \
> +       -DCMAKE_EXE_LINKER_FLAGS_INIT="-fuse-ld=lld" \
> +       -DCMAKE_MODULE_LINKER_FLAGS_INIT="-fuse-ld=lld" \
> +       -DCMAKE_SHARED_LINKER_FLAGS_INIT="-fuse-ld=lld" \
> +       -DDATA_DIRECTORY=${datadir} \
> +       -DQT_HOST_PATH:PATH=${RECIPE_SYSROOT_NATIVE}${prefix_native} \
> +"
> +
> +inherit cmake ccache pkgconfig features_check
> +
> +FILES:${PN} += "${datadir} ${libdir}/binfmt.d ${libdir}/libFEXCore.so"
> +FILES:${PN}-dev = "${includedir}"
> --
> 2.51.0
>
>
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On Thu, Nov 13 2025 at 18:18:40 -08:00:00, Khem Raj via 
lists.openembedded.org <raj.khem=gmail.com@lists.openembedded.org> 
wrote:
> LDFLAGS += "-fuse-ld=lld"

Thanks. I will test if that works as well. I needed to set it to lld 
because by default it wanted to use gold linker and failed with file 
not found

On Thu, Nov 13 2025 at 18:18:40 -08:00:00, Khem Raj via 
lists.openembedded.org <raj.khem=gmail.com@lists.openembedded.org> 
wrote:
> You. can just add LDFLAGS += "-fuse-ld=lld" instead of demanding the 
> distro feature
> that will make it work with wider variety of distro settings, not 
> many OE distros default to LLD yet.

It works like that. But I also added the feature_check because I was 
afraid that it would break meta-openembedded world build.
If you try to build fex with gcc toolchain it will throw an error

On Thu, Nov 13, 2025 at 6:36 PM Markus Volk via lists.openembedded.org
<f_l_k=t-online.de@lists.openembedded.org> wrote:

> On Thu, Nov 13 2025 at 18:18:40 -08:00:00, Khem Raj via
> lists.openembedded.org <raj.khem=gmail.com@lists.openembedded.org> wrote:
>
> You. can just add LDFLAGS += "-fuse-ld=lld" instead of demanding the
> distro feature
> that will make it work with wider variety of distro settings, not many OE
> distros default to LLD yet.
>
>
> It works like that. But I also added the feature_check because I was
> afraid that it would break meta-openembedded world build.
> If you try to build fex with gcc toolchain it will throw an error
>

Once you set TOOLCHAIN = "clang" then gcc is out of picture.


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