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tvl-depot/third_party/nix/CMakeLists.txt

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refactor(3p/nix): Introduce CMake as the build system for Nix Completes the switch from Meson to CMake for the core build system in Nix. Meson was added originally because someone else had already done the work for integrating it in Nix and it was an upgrade from the previous setup. However over time it became clear that Meson is not quite mature enough for projects like Nix that have occasionally peculiar configuration constraints. Some issues encountered with Meson (some of these are due to the Meson setup in Nix): * Difficulty with generating correct compile_commands.json for external tools like clangd * Difficulty linking to libc++ when using clang * Ugly shell invocations for certain parts of the build system (I want these to be gone!!!) This CMake setup mimics the Meson configuration, but there are some differences (some temporary): * headers are now included separately for each library (see a previous commit that changes includes appropriately) * autoheaders-style configuration is currently hardcoded. Before blindly copying this I want to evaluate how much of it actually exists for portability concerns that I don't have (such as support for OS X). * Nix is built with libc++ by default. * [libstore] SQL schema is now inlined via a generated header, not an included string literal Abseil is still built as part of this build, rather than an external dependency, because it chokes on differently configured compiler invocations. Note that because of the move to libc++ an unwanted behaviour is introduced: glog log messages no longer have a body. I have yet to debug what is going on there.
2020-05-27 23:03:36 +02:00
# -*- mode: cmake; -*-
cmake_minimum_required(VERSION 3.16)
project(nix CXX)
set(CMAKE_CXX_STANDARD 17)
feat(3p/nix): Configure CMake to generate compile commands
2020-05-29 23:31:07 +02:00
# Export compile_commands.json which can be used by tools such as
# clangd and clang-tidy.
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
chore(3p/nix): use GNUInstallDirs to determine output directory names This ensures that we install both glog's .a and all the .so files we generate into a single consistent output lib path (which is, err, lib64, but whatever). Change-Id: Ib6ac6eacf5f56e4b719cfb586db731efc122c31b Reviewed-on: https://cl.tvl.fyi/c/depot/+/544 Reviewed-by: tazjin <mail@tazj.in>
2020-06-21 18:20:59 +02:00
# Provide an output path for pkgconfig.
include(GNUInstallDirs)
feat(3p/nix): install pkgconfig files for libexpr, libmain and libstore Also fixes the pkgconfig files to use the corresponding CMake variables. Change-Id: I8095b8aff39ad91e592f3edc95555c9f1f1f153d Reviewed-on: https://cl.tvl.fyi/c/depot/+/545 Reviewed-by: tazjin <mail@tazj.in>
2020-06-21 18:23:08 +02:00
set(PKGCONFIG_INSTALL_DIR ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
chore(3p/nix): use GNUInstallDirs to determine output directory names This ensures that we install both glog's .a and all the .so files we generate into a single consistent output lib path (which is, err, lib64, but whatever). Change-Id: Ib6ac6eacf5f56e4b719cfb586db731efc122c31b Reviewed-on: https://cl.tvl.fyi/c/depot/+/544 Reviewed-by: tazjin <mail@tazj.in>
2020-06-21 18:20:59 +02:00
refactor(3p/nix): Introduce CMake as the build system for Nix Completes the switch from Meson to CMake for the core build system in Nix. Meson was added originally because someone else had already done the work for integrating it in Nix and it was an upgrade from the previous setup. However over time it became clear that Meson is not quite mature enough for projects like Nix that have occasionally peculiar configuration constraints. Some issues encountered with Meson (some of these are due to the Meson setup in Nix): * Difficulty with generating correct compile_commands.json for external tools like clangd * Difficulty linking to libc++ when using clang * Ugly shell invocations for certain parts of the build system (I want these to be gone!!!) This CMake setup mimics the Meson configuration, but there are some differences (some temporary): * headers are now included separately for each library (see a previous commit that changes includes appropriately) * autoheaders-style configuration is currently hardcoded. Before blindly copying this I want to evaluate how much of it actually exists for portability concerns that I don't have (such as support for OS X). * Nix is built with libc++ by default. * [libstore] SQL schema is now inlined via a generated header, not an included string literal Abseil is still built as part of this build, rather than an external dependency, because it chokes on differently configured compiler invocations. Note that because of the move to libc++ an unwanted behaviour is introduced: glog log messages no longer have a body. I have yet to debug what is going on there.
2020-05-27 23:03:36 +02:00
# The following lines import CMake-native dependencies which may
# contain useful definitions. Other dependencies are not treated
# specially by CMake and are only linked into the resulting binary.
find_package(BZip2)
find_package(Boost COMPONENTS context) # probably coroutine + ::headers, lets find out
find_package(CURL)
fix(3p/nix): Link to glog built by Nix Same as cl/921, it seems that the trick to making this work is indeed overriding the C++ standard used in the dependency. Change-Id: I3c5984d71014d774c161ecc283844f504fd44719 Reviewed-on: https://cl.tvl.fyi/c/depot/+/922 Tested-by: BuildkiteCI Reviewed-by: lukegb <lukegb@tvl.fyi>
2020-07-05 18:46:01 +02:00
find_package(LibLZMA)
refactor(3p/nix): Introduce CMake as the build system for Nix Completes the switch from Meson to CMake for the core build system in Nix. Meson was added originally because someone else had already done the work for integrating it in Nix and it was an upgrade from the previous setup. However over time it became clear that Meson is not quite mature enough for projects like Nix that have occasionally peculiar configuration constraints. Some issues encountered with Meson (some of these are due to the Meson setup in Nix): * Difficulty with generating correct compile_commands.json for external tools like clangd * Difficulty linking to libc++ when using clang * Ugly shell invocations for certain parts of the build system (I want these to be gone!!!) This CMake setup mimics the Meson configuration, but there are some differences (some temporary): * headers are now included separately for each library (see a previous commit that changes includes appropriately) * autoheaders-style configuration is currently hardcoded. Before blindly copying this I want to evaluate how much of it actually exists for portability concerns that I don't have (such as support for OS X). * Nix is built with libc++ by default. * [libstore] SQL schema is now inlined via a generated header, not an included string literal Abseil is still built as part of this build, rather than an external dependency, because it chokes on differently configured compiler invocations. Note that because of the move to libc++ an unwanted behaviour is introduced: glog log messages no longer have a body. I have yet to debug what is going on there.
2020-05-27 23:03:36 +02:00
find_package(SQLite3)
find_package(Threads)
fix(3p/nix): Link to Abseil built by Nix This didn't work previously ... but now it does. I think setting the standard explicitly is what did the trick, but it's slightly unclear to me why. Either way this means that Abseil is no longer constantly getting recompiled when building Nix, which is nice. Change-Id: I377f7b68bf1ef9045df6a2eee8fdd0c92f243547 Reviewed-on: https://cl.tvl.fyi/c/depot/+/921 Tested-by: BuildkiteCI Reviewed-by: lukegb <lukegb@tvl.fyi>
2020-07-05 18:37:36 +02:00
find_package(absl REQUIRED)
fix(3p/nix): Link to glog built by Nix Same as cl/921, it seems that the trick to making this work is indeed overriding the C++ standard used in the dependency. Change-Id: I3c5984d71014d774c161ecc283844f504fd44719 Reviewed-on: https://cl.tvl.fyi/c/depot/+/922 Tested-by: BuildkiteCI Reviewed-by: lukegb <lukegb@tvl.fyi>
2020-07-05 18:46:01 +02:00
find_package(glog REQUIRED)
fix(3p/nix): Build glog as included CMake project
2020-05-29 22:51:29 +02:00
refactor(3p/nix): Introduce CMake as the build system for Nix Completes the switch from Meson to CMake for the core build system in Nix. Meson was added originally because someone else had already done the work for integrating it in Nix and it was an upgrade from the previous setup. However over time it became clear that Meson is not quite mature enough for projects like Nix that have occasionally peculiar configuration constraints. Some issues encountered with Meson (some of these are due to the Meson setup in Nix): * Difficulty with generating correct compile_commands.json for external tools like clangd * Difficulty linking to libc++ when using clang * Ugly shell invocations for certain parts of the build system (I want these to be gone!!!) This CMake setup mimics the Meson configuration, but there are some differences (some temporary): * headers are now included separately for each library (see a previous commit that changes includes appropriately) * autoheaders-style configuration is currently hardcoded. Before blindly copying this I want to evaluate how much of it actually exists for portability concerns that I don't have (such as support for OS X). * Nix is built with libc++ by default. * [libstore] SQL schema is now inlined via a generated header, not an included string literal Abseil is still built as part of this build, rather than an external dependency, because it chokes on differently configured compiler invocations. Note that because of the move to libc++ an unwanted behaviour is introduced: glog log messages no longer have a body. I have yet to debug what is going on there.
2020-05-27 23:03:36 +02:00
# generate a configuration file (autoheader-style) to configure
# certain symbols that Nix depends on.
configure_file(config.h.in nix_config.h @ONLY)
fix(3p/nix): install nix_config.h and config.nix This also installs the rest of corepkgs as a side-effect. Change-Id: I67a42d45793d5e8fdad51c1f306eebf63e9c2868 Reviewed-on: https://cl.tvl.fyi/c/depot/+/548 Reviewed-by: tazjin <mail@tazj.in>
2020-06-21 22:40:55 +02:00
INSTALL(FILES "${PROJECT_BINARY_DIR}/nix_config.h" DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/nix")
# install corepkgs
configure_file(corepkgs/config.nix.in config.nix @ONLY)
INSTALL(DIRECTORY corepkgs
DESTINATION ${CMAKE_INSTALL_DATADIR}/nix
FILES_MATCHING
PATTERN "*.nix")
INSTALL(FILES "${PROJECT_BINARY_DIR}/config.nix" DESTINATION "${CMAKE_INSTALL_DATADIR}/nix/corepkgs")
refactor(3p/nix): Introduce CMake as the build system for Nix Completes the switch from Meson to CMake for the core build system in Nix. Meson was added originally because someone else had already done the work for integrating it in Nix and it was an upgrade from the previous setup. However over time it became clear that Meson is not quite mature enough for projects like Nix that have occasionally peculiar configuration constraints. Some issues encountered with Meson (some of these are due to the Meson setup in Nix): * Difficulty with generating correct compile_commands.json for external tools like clangd * Difficulty linking to libc++ when using clang * Ugly shell invocations for certain parts of the build system (I want these to be gone!!!) This CMake setup mimics the Meson configuration, but there are some differences (some temporary): * headers are now included separately for each library (see a previous commit that changes includes appropriately) * autoheaders-style configuration is currently hardcoded. Before blindly copying this I want to evaluate how much of it actually exists for portability concerns that I don't have (such as support for OS X). * Nix is built with libc++ by default. * [libstore] SQL schema is now inlined via a generated header, not an included string literal Abseil is still built as part of this build, rather than an external dependency, because it chokes on differently configured compiler invocations. Note that because of the move to libc++ an unwanted behaviour is introduced: glog log messages no longer have a body. I have yet to debug what is going on there.
2020-05-27 23:03:36 +02:00
add_subdirectory(src)
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