1 files changed, 79 insertions, 0 deletions
diff --git a/config/toolchain/build32.cmake b/config/toolchain/build32.cmake
new file mode 100644
index 0000000..a2566c3
--- /dev/null
+++ b/config/toolchain/build32.cmake
@@ -0,0 +1,79 @@
+if (WIN32)
+  set (CMAKE_SYSTEM_NAME Windows)
+  set (CMAKE_GENERATOR_PLATFORM "x86")
+elseif(APPLE)
+  set (CMAKE_OSX_ARCHITECTURES "i386")
+elseif(MINGW)
+  set (CMAKE_SYSTEM_NAME Windows)
+  set (TOOLCHAIN_PREFIX i686-w64-mingw32)
+  set (CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}-gcc)
+  set (CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}-g++)
+  set (CMAKE_RC_COMPILER ${TOOLCHAIN_PREFIX}-windres)
+  set (CMAKE_Fortran_COMPILER ${TOOLCHAIN_PREFIX}-gfortran)
+
+  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32" CACHE STRING "c++ flags")
+  set (CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -m32" CACHE STRING "c flags")
+
+  set (LIB32 /usr/lib) # Fedora
+
+  if (EXISTS "/usr/lib32")
+    set (LIB32 /usr/lib32) # Arch, Solus
+  endif ()
+
+  set (CMAKE_SYSTEM_LIBRARY_PATH ${LIB32} CACHE STRING "system library search path" FORCE)
+  set (CMAKE_LIBRARY_PATH        ${LIB32} CACHE STRING "library search path"        FORCE)
+
+  # this is probably unlikely to be needed, but just in case
+  set (CMAKE_EXE_LINKER_FLAGS    "-m32 -L${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)
+
+  # on Fedora and Arch and similar, point pkgconfig at 32 bit .pc files. We have
+  # to include the regular system .pc files as well (at the end), because some
+  # are not always present in the 32 bit directory
+  if (EXISTS "${LIB32}/pkgconfig")
+    set (ENV{PKG_CONFIG_LIBDIR} ${LIB32}/pkgconfig:/usr/share/pkgconfig:/usr/lib/pkgconfig:/usr/lib64/pkgconfig)
+  endif ()
+
+  set (CMAKE_FIND_ROOT_PATH /usr/${TOOLCHAIN_PREFIX})
+  set (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+  set (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+  set (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+  set (CMAKE_CROSSCOMPILING_EMULATOR wine)
+
+  include_directories(/usr/${TOOLCHAIN_PREFIX}/include)
+  set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS On CACHE BOOL "Export windows symbols")
+else ()
+  set (CMAKE_SYSTEM_NAME Linux)
+
+  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32" CACHE STRING "c++ flags")
+  set (CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -m32" CACHE STRING "c flags")
+
+  set (LIB32 /usr/lib) # Fedora
+
+  if (EXISTS "/usr/lib32")
+    set (LIB32 /usr/lib32) # Arch, Solus
+  endif ()
+
+  set (CMAKE_SYSTEM_LIBRARY_PATH ${LIB32} CACHE STRING "system library search path" FORCE)
+  set (CMAKE_LIBRARY_PATH        ${LIB32} CACHE STRING "library search path"        FORCE)
+
+  # this is probably unlikely to be needed, but just in case
+  set (CMAKE_EXE_LINKER_FLAGS    "-m32 -L${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)
+
+  # on Fedora and Arch and similar, point pkgconfig at 32 bit .pc files. We have
+  # to include the regular system .pc files as well (at the end), because some
+  # are not always present in the 32 bit directory
+  if (EXISTS "${LIB32}/pkgconfig")
+    set (ENV{PKG_CONFIG_LIBDIR} ${LIB32}/pkgconfig:/usr/share/pkgconfig:/usr/lib/pkgconfig:/usr/lib64/pkgconfig)
+  endif ()
+# where is the target environment
+  set (CMAKE_FIND_ROOT_PATH ${LIB32})
+# search for programs in the build host directories
+  set (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+# for libraries and headers in the target directories
+  set (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+  set (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endif ()