59 lines
3.2 KiB
CMake
59 lines
3.2 KiB
CMake
#
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# Singe 3
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# Copyright (C) 2006-2026 Scott Duensing <scott@kangaroopunch.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public Licens
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# as published by the Free Software Foundation; either version 3
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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#
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# Linux x86_64 with zig as the compiler, targeting glibc 2.28 (Debian 10, Ubuntu 18.04) so one
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# release binary runs on more distributions than the build host's own glibc allows. zig supplies
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# libc and its headers; the platform libraries (ALSA, X11, DRM, VA-API, VDPAU, GL) and their
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# headers come from the host's development packages, searched after zig's own so the host's
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# newer glibc headers never shadow the pinned ones.
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include(${CMAKE_CURRENT_LIST_DIR}/zig.cmake)
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set(SINGE_GLIBC_VERSION 2.28)
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set(CMAKE_SYSTEM_NAME Linux)
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set(CMAKE_SYSTEM_PROCESSOR x86_64)
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# The linker may see the host's platform libraries but never its libc, libm, libpthread or gcc
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# runtime, or symbols get bound to the host's newer glibc versions. A directory of links to
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# everything else under the host's library directory keeps the two apart.
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set(hostLibs ${CMAKE_BINARY_DIR}/hostlibs)
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file(MAKE_DIRECTORY ${hostLibs})
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file(GLOB hostSharedLibs /usr/lib/x86_64-linux-gnu/lib*.so)
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foreach(lib ${hostSharedLibs})
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get_filename_component(name ${lib} NAME)
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if(NOT name MATCHES "^lib(c|m|dl|pthread|rt|resolv|util|anl|nsl|crypt|gcc_s|stdc\\+\\+|BrokenLocale|mvec|memusage|pcprofile|SegFault|thread_db|c_malloc_debug|asan|ubsan|tsan|lsan|atomic|gomp|itm|quadmath)\\.so$")
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if(NOT EXISTS ${hostLibs}/${name})
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file(CREATE_LINK ${lib} ${hostLibs}/${name} SYMBOLIC)
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endif()
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endif()
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endforeach()
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# --allow-shlib-undefined: the host's platform libraries reference its newer glibc; at link time only
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# their symbols matter, and the machine that runs the binary brings its own copies.
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singeZigToolchain(x86_64-linux-gnu.${SINGE_GLIBC_VERSION} "-idirafter /usr/include/x86_64-linux-gnu -idirafter /usr/include -L${hostLibs} -Wl,--allow-shlib-undefined")
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# No find-root restrictions: the host's development packages are the platform packages here, so
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# SDL3 must find X11, Wayland, ALSA and the rest where they are. CMake learns the Debian multiarch
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# library directory from gcc, not from a clang-style compiler, and its compiler detection overwrites
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# a plain variable, so the settings are forced into the cache or FindX11 never sees libX11.
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set(CMAKE_LIBRARY_ARCHITECTURE x86_64-linux-gnu CACHE STRING "Debian multiarch library directory name" FORCE)
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set(CMAKE_C_LIBRARY_ARCHITECTURE x86_64-linux-gnu CACHE STRING "Debian multiarch library directory name" FORCE)
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set(CMAKE_LIBRARY_PATH /usr/lib/x86_64-linux-gnu CACHE PATH "Where the host platform libraries live" FORCE)
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set(KANGAROO_OS linux)
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set(KANGAROO_ARCH x86_64)
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