ci: Add an x86 build

Fairly minimal for now to save time, but we can add more deps and cover
more code as needed. We don't test or install as this isn't a native
build and we just want to make sure it builds for now.

.gitlab-ci.yml

@@ -97,6 +97,36 @@ include:
 #    FDO_DISTRIBUTION_EXEC: >-
 #      pip3 install meson
 
+# This is a pruned down container with enough dependencies for a basic i686
+# build to make sure we've not broken anything. This can be extended if we want
+# to cover more of the code.
+.fedora_x86:
+  variables:
+    # Update this tag when you want to trigger a rebuild
+    FDO_DISTRIBUTION_TAG: '2025-05-29.1'
+    FDO_DISTRIBUTION_VERSION: '42'
+    FDO_DISTRIBUTION_PACKAGES: >-
+      git
+      gcc
+      gcc-c++
+      meson
+      glibc-devel.i686
+      systemd-devel.i686
+      dbus-devel.i686
+      alsa-lib-devel.i686
+      bluez-libs-devel.i686
+      libffi-devel.i686
+      pcre2-devel.i686
+      sysprof-devel.i686
+      zlib-ng-compat-devel.i686
+      libblkid-devel.i686
+      libmount-devel.i686
+      libselinux-devel.i686
+      glib2-devel.i686
+      alsa-lib-devel
+      avahi-devel
+      bluez-libs-devel
+
 .ubuntu:
   variables:
     # Update this tag when you want to trigger a rebuild
@@ -208,8 +238,14 @@ include:
     - echo "Building with meson options $MESON_OPTIONS"
     - meson setup "$BUILD_DIR" --prefix="$PREFIX" $MESON_OPTIONS
     - meson compile -C "$BUILD_DIR" $COMPILE_ARGS
-    - meson test -C "$BUILD_DIR" --no-rebuild
-    - meson install -C "$BUILD_DIR" --no-rebuild
+    - |
+      if [ -z "$MESON_SKIP_TEST" ]; then
+        meson test -C "$BUILD_DIR" --no-rebuild
+      fi
+    - |
+      if [ -z "$MESON_SKIP_INSTALL" ]; then
+        meson install -C "$BUILD_DIR" --no-rebuild
+      fi
   artifacts:
     name: pipewire-$CI_COMMIT_SHA
     when: always
@@ -232,6 +268,14 @@ container_fedora:
   variables:
     GIT_STRATEGY: none # no need to pull the whole tree for rebuilding the image
 
+container_fedora_x86:
+  extends:
+    - .fedora_x86
+    - .fdo.container-build@fedora
+  stage: container
+  variables:
+    GIT_STRATEGY: none # no need to pull the whole tree for rebuilding the image
+
 container_alpine:
   extends:
     - .alpine
@@ -357,6 +401,21 @@ build_on_fedora_html_docs:
   rules:
     - !reference [pages, rules]
 
+build_on_fedora_x86:
+  extends:
+    - .fedora_x86
+    - .not_coverity
+    - .fdo.distribution-image@fedora
+    - .build
+  stage: build
+  needs:
+    - job: container_fedora_x86
+      artifacts: false
+  variables:
+    MESON_OPTIONS: "--cross-file=cross-x86.txt"
+    MESON_SKIP_TEST: "true"
+    MESON_SKIP_INSTALL: "true"
+
 build_on_alpine:
   extends:
     - .alpine

cross-x86.txt

@@ -0,0 +1,23 @@
+[binaries]
+c = 'gcc'
+cpp = 'g++'
+ld = 'ld'
+cmake = 'cmake'
+strip = 'strip'
+pkg-config = 'pkg-config'
+
+[properties]
+pkg_config_libdir = '/usr/lib/pkgconfig'
+ld_args = '-m elf_i386'
+
+[built-in options]
+c_args = '-m32 -msse'
+c_link_args = '-m32 -msse'
+cpp_args = '-m32 -msse'
+cpp_link_args = '-m32 -msse'
+
+[host_machine]
+system = 'linux'
+cpu_family = 'x86'
+cpu = 'i686'
+endian = 'little'