[Travis CI] Add Fedora (LATEST) 32-bit build

.travis.yml

@@ -158,6 +158,25 @@ matrix:
         - docker run --rm -e CI -e TRAVIS -e "TRAVIS_BUILD_DIR=/code" -e TRAVIS_BRANCH -e TRAVIS_COMMIT -e TRAVIS_PULL_REQUEST_BRANCH -e TRAVIS_TAG -e MAKEFLAGS -v $(pwd):/code fedora cmake '-H.' -Bbuild -DCMAKE_BUILD_TYPE=RelWithDebInfo -DWZ_ENABLE_WARNINGS:BOOL=ON -G"Ninja"
         - docker run --rm -e CI -e TRAVIS -e "TRAVIS_BUILD_DIR=/code" -e TRAVIS_BRANCH -e TRAVIS_COMMIT -e TRAVIS_PULL_REQUEST_BRANCH -e TRAVIS_TAG -e MAKEFLAGS -v $(pwd):/code fedora cmake --build build
 
+    # Build for Fedora :LATEST (CMake) (GCC) (32-bit -m32 cross-compile)
+    - name: "Fedora :LATEST (CMake) [GCC -m32]"
+      language: cpp
+      compiler: gcc
+      sudo: required
+      services:
+        - docker
+      install:
+        - cd docker/fedora-latest-m32/
+        - docker build -t fedora .
+        - cd ../..
+      script:
+        - export MAKEFLAGS="-j$((`grep -c ^processor /proc/cpuinfo`*2))"
+        # Must supply the TRAVIS environment variables to the docker container so autorevision properly receives the revision info from Travis
+        # To do this, append the following to the pertinent lines after —rm:
+        # -e CI -e TRAVIS -e "TRAVIS_BUILD_DIR=/code" -e TRAVIS_BRANCH -e TRAVIS_COMMIT -e TRAVIS_PULL_REQUEST_BRANCH -e TRAVIS_TAG
+        - docker run --rm -e CI -e TRAVIS -e "TRAVIS_BUILD_DIR=/code" -e TRAVIS_BRANCH -e TRAVIS_COMMIT -e TRAVIS_PULL_REQUEST_BRANCH -e TRAVIS_TAG -e MAKEFLAGS -v $(pwd):/code fedora cmake '-H.' -Bbuild -DCMAKE_TOOLCHAIN_FILE=build_tools/ci/cmake/Toolchain-Linux-cross-m32.cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DWZ_ENABLE_WARNINGS:BOOL=ON -G"Ninja"
+        - docker run --rm -e CI -e TRAVIS -e "TRAVIS_BUILD_DIR=/code" -e TRAVIS_BRANCH -e TRAVIS_COMMIT -e TRAVIS_PULL_REQUEST_BRANCH -e TRAVIS_TAG -e MAKEFLAGS -v $(pwd):/code fedora cmake --build build
+
     # Build for macOS (CMake)
     - name: "macOS (CMake) [Xcode 8.3, macOS 10.12 SDK]"
       language: objective-c

build_tools/ci/cmake/Toolchain-Linux-cross-m32.cmake

@@ -0,0 +1,25 @@
+# Toolchain for cross-compiling i686 (32-bit) on 64-bit Linux
+
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_PROCESSOR "i686")
+
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32" CACHE STRING "C compiler flags" FORCE)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32" CACHE STRING "C++ compiler flags" FORCE)
+
+set(LIB32 "/usr/lib") # Fedora
+
+set(CMAKE_FIND_ROOT_PATH "${LIB32}" CACHE STRING "Find root path" FORCE)
+
+#set(CMAKE_LIBRARY_PATH "${LIB32}" CACHE STRING "Library search path" FORCE)
+
+set(CMAKE_EXE_LINKER_FLAGS "-m32 -L${LIB32}" CACHE STRING "Executable linker flags" FORCE)
+set(CMAKE_SHARED_LINKER_FLAGS "-m32 -L${LIB32}" CACHE STRING "Shared library linker flags" FORCE)
+set(CMAKE_MODULE_LINKER_FLAGS "-m32 -L${LIB32}" CACHE STRING "Module linker flags" FORCE)
+
+# Point pkgconfig at 32-bit .pc files first, falling back to regular system .pc files
+if(EXISTS "${LIB32}/pkgconfig")
+	set(ENV{PKG_CONFIG_LIBDIR} "${LIB32}/pkgconfig:/usr/share/pkgconfig:/usr/lib/pkgconfig:/usr/lib64/pkgconfig")
+endif()
+
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE BOTH)