AC_INIT([nix],[m4_esyscmd(bash -c "echo -n $(cat ./.version)$VERSION_SUFFIX")]) AC_CONFIG_MACRO_DIRS([m4]) AC_CONFIG_SRCDIR(README.md) AC_CONFIG_AUX_DIR(config) AC_PROG_SED # Construct a Nix system name (like "i686-linux"): # https://www.gnu.org/software/autoconf/manual/html_node/Canonicalizing.html#index-AC_005fCANONICAL_005fHOST-1 # The inital value is produced by the `config/config.guess` script: # upstream: https://git.savannah.gnu.org/cgit/config.git/tree/config.guess # It has the following form, which is not documented anywhere: # <cpu>-<vendor>-<os>[<version>][-<abi>] # If `./configure` is passed any of the `--host`, `--build`, `--target` options, the value comes from `config/config.sub` instead: # upstream: https://git.savannah.gnu.org/cgit/config.git/tree/config.sub AC_CANONICAL_HOST AC_MSG_CHECKING([for the canonical Nix system name]) AC_ARG_WITH(system, AS_HELP_STRING([--with-system=SYSTEM],[Platform identifier (e.g., `i686-linux').]), [system=$withval], [case "$host_cpu" in i*86) machine_name="i686";; amd64) machine_name="x86_64";; armv6|armv7) machine_name="${host_cpu}l";; *) machine_name="$host_cpu";; esac case "$host_os" in linux-gnu*|linux-musl*) # For backward compatibility, strip the `-gnu' part. system="$machine_name-linux";; *) # Strip the version number from names such as `gnu0.3', # `darwin10.2.0', etc. system="$machine_name-`echo $host_os | "$SED" -e's/@<:@0-9.@:>@*$//g'`";; esac]) AC_MSG_RESULT($system) AC_SUBST(system) AC_DEFINE_UNQUOTED(SYSTEM, ["$system"], [platform identifier ('cpu-os')]) # State should be stored in /nix/var, unless the user overrides it explicitly. test "$localstatedir" = '${prefix}/var' && localstatedir=/nix/var AC_PROG_CC AC_PROG_CXX AC_PROG_CPP AC_CHECK_TOOL([AR], [ar]) # Use 64-bit file system calls so that we can support files > 2 GiB. AC_SYS_LARGEFILE # Solaris-specific stuff. AC_STRUCT_DIRENT_D_TYPE case "$host_os" in solaris*) # Solaris requires -lsocket -lnsl for network functions LDFLAGS="-lsocket -lnsl $LDFLAGS" ;; esac # Check for pubsetbuf. AC_MSG_CHECKING([for pubsetbuf]) AC_LANG_PUSH(C++) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <iostream> using namespace std; static char buf[1024];]], [[cerr.rdbuf()->pubsetbuf(buf, sizeof(buf));]])], [AC_MSG_RESULT(yes) AC_DEFINE(HAVE_PUBSETBUF, 1, [Whether pubsetbuf is available.])], AC_MSG_RESULT(no)) AC_LANG_POP(C++) AC_CHECK_FUNCS([statvfs pipe2]) # Check for lutimes, optionally used for changing the mtime of # symlinks. AC_CHECK_FUNCS([lutimes]) # Check whether the store optimiser can optimise symlinks. AC_MSG_CHECKING([whether it is possible to create a link to a symlink]) ln -s bla tmp_link if ln tmp_link tmp_link2 2> /dev/null; then AC_MSG_RESULT(yes) AC_DEFINE(CAN_LINK_SYMLINK, 1, [Whether link() works on symlinks.]) else AC_MSG_RESULT(no) fi rm -f tmp_link tmp_link2 # Check for <locale>. AC_LANG_PUSH(C++) AC_CHECK_HEADERS([locale]) AC_LANG_POP(C++) AC_DEFUN([NEED_PROG], [ AC_PATH_PROG($1, $2) if test -z "$$1"; then AC_MSG_ERROR([$2 is required]) fi ]) NEED_PROG(bash, bash) AC_PATH_PROG(flex, flex, false) AC_PATH_PROG(bison, bison, false) AC_PATH_PROG(dot, dot) AC_PATH_PROG(lsof, lsof, lsof) NEED_PROG(jq, jq) AC_SUBST(coreutils, [$(dirname $(type -p cat))]) AC_ARG_WITH(store-dir, AS_HELP_STRING([--with-store-dir=PATH],[path of the Nix store (defaults to /nix/store)]), storedir=$withval, storedir='/nix/store') AC_SUBST(storedir) # Look for boost, a required dependency. # Note that AX_BOOST_BASE only exports *CPP* BOOST_CPPFLAGS, no CXX flags, # and CPPFLAGS are not passed to the C++ compiler automatically. # Thus we append the returned CPPFLAGS to the CXXFLAGS here. AX_BOOST_BASE([1.66], [CXXFLAGS="$BOOST_CPPFLAGS $CXXFLAGS"], [AC_MSG_ERROR([Nix requires boost.])]) # For unknown reasons, setting this directly in the ACTION-IF-FOUND above # ends up with LDFLAGS being empty, so we set it afterwards. LDFLAGS="$BOOST_LDFLAGS $LDFLAGS" # On some platforms, new-style atomics need a helper library AC_MSG_CHECKING(whether -latomic is needed) AC_LINK_IFELSE([AC_LANG_SOURCE([[ #include <stdint.h> uint64_t v; int main() { return (int)__atomic_load_n(&v, __ATOMIC_ACQUIRE); }]])], GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC=no, GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC=yes) AC_MSG_RESULT($GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC) if test "x$GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC" = xyes; then LDFLAGS="-latomic $LDFLAGS" fi # Building without tests is useful for bootstrapping with a smaller footprint # or running the tests in a separate derivation. Otherwise, we do compile and # run them. AC_ARG_ENABLE(tests, AS_HELP_STRING([--disable-tests],[Do not build the tests]), tests=$enableval, tests=yes) AC_SUBST(tests) # Building without API docs is the default as Nix' C++ interfaces are internal and unstable. AC_ARG_ENABLE(internal_api_docs, AS_HELP_STRING([--enable-internal-api-docs],[Build API docs for Nix's internal unstable C++ interfaces]), internal_api_docs=$enableval, internal_api_docs=no) AC_SUBST(internal_api_docs) # LTO is currently broken with clang for unknown reasons; ld segfaults in the llvm plugin AC_ARG_ENABLE(lto, AS_HELP_STRING([--enable-lto],[Enable LTO (only supported with GCC) [default=no]]), lto=$enableval, lto=no) if test "$lto" = yes; then if $CXX --version | grep -q GCC; then AC_SUBST(CXXLTO, [-flto=jobserver]) else echo "error: LTO is only supported with GCC at the moment" >&2 exit 1 fi else AC_SUBST(CXXLTO, [""]) fi PKG_PROG_PKG_CONFIG AC_ARG_ENABLE(shared, AS_HELP_STRING([--enable-shared],[Build shared libraries for Nix [default=yes]]), shared=$enableval, shared=yes) if test "$shared" = yes; then AC_SUBST(BUILD_SHARED_LIBS, 1, [Whether to build shared libraries.]) else AC_SUBST(BUILD_SHARED_LIBS, 0, [Whether to build shared libraries.]) PKG_CONFIG="$PKG_CONFIG --static" fi # Look for OpenSSL, a required dependency. FIXME: this is only (maybe) # used by S3BinaryCacheStore. PKG_CHECK_MODULES([OPENSSL], [libcrypto >= 1.1.1], [CXXFLAGS="$OPENSSL_CFLAGS $CXXFLAGS"]) # Look for libarchive. PKG_CHECK_MODULES([LIBARCHIVE], [libarchive >= 3.1.2], [CXXFLAGS="$LIBARCHIVE_CFLAGS $CXXFLAGS"]) # Workaround until https://github.com/libarchive/libarchive/issues/1446 is fixed if test "$shared" != yes; then LIBARCHIVE_LIBS+=' -lz' fi # Look for SQLite, a required dependency. PKG_CHECK_MODULES([SQLITE3], [sqlite3 >= 3.6.19], [CXXFLAGS="$SQLITE3_CFLAGS $CXXFLAGS"]) # Look for libcurl, a required dependency. PKG_CHECK_MODULES([LIBCURL], [libcurl], [CXXFLAGS="$LIBCURL_CFLAGS $CXXFLAGS"]) # Look for editline, a required dependency. # The the libeditline.pc file was added only in libeditline >= 1.15.2, # see https://github.com/troglobit/editline/commit/0a8f2ef4203c3a4a4726b9dd1336869cd0da8607, # but e.g. Ubuntu 16.04 has an older version, so we fall back to searching for # editline.h when the pkg-config approach fails. PKG_CHECK_MODULES([EDITLINE], [libeditline], [CXXFLAGS="$EDITLINE_CFLAGS $CXXFLAGS"], [ AC_CHECK_HEADERS([editline.h], [true], [AC_MSG_ERROR([Nix requires libeditline; it was found neither via pkg-config nor its normal header.])]) AC_SEARCH_LIBS([readline read_history], [editline], [], [AC_MSG_ERROR([Nix requires libeditline; it was not found via pkg-config, but via its header, but required functions do not work. Maybe it is too old? >= 1.14 is required.])]) ]) # Look for libsodium. PKG_CHECK_MODULES([SODIUM], [libsodium], [CXXFLAGS="$SODIUM_CFLAGS $CXXFLAGS"]) # Look for libbrotli{enc,dec}. PKG_CHECK_MODULES([LIBBROTLI], [libbrotlienc libbrotlidec], [CXXFLAGS="$LIBBROTLI_CFLAGS $CXXFLAGS"]) # Look for libcpuid. have_libcpuid= if test "$machine_name" = "x86_64"; then AC_ARG_ENABLE([cpuid], AS_HELP_STRING([--disable-cpuid], [Do not determine microarchitecture levels with libcpuid (relevant to x86_64 only)])) if test "x$enable_cpuid" != "xno"; then PKG_CHECK_MODULES([LIBCPUID], [libcpuid], [CXXFLAGS="$LIBCPUID_CFLAGS $CXXFLAGS" have_libcpuid=1 AC_DEFINE([HAVE_LIBCPUID], [1], [Use libcpuid])] ) fi fi AC_SUBST(HAVE_LIBCPUID, [$have_libcpuid]) # Look for libseccomp, required for Linux sandboxing. case "$host_os" in linux*) AC_ARG_ENABLE([seccomp-sandboxing], AS_HELP_STRING([--disable-seccomp-sandboxing],[Don't build support for seccomp sandboxing (only recommended if your arch doesn't support libseccomp yet!) ])) if test "x$enable_seccomp_sandboxing" != "xno"; then PKG_CHECK_MODULES([LIBSECCOMP], [libseccomp], [CXXFLAGS="$LIBSECCOMP_CFLAGS $CXXFLAGS"]) have_seccomp=1 AC_DEFINE([HAVE_SECCOMP], [1], [Whether seccomp is available and should be used for sandboxing.]) else have_seccomp= fi ;; *) have_seccomp= ;; esac AC_SUBST(HAVE_SECCOMP, [$have_seccomp]) # Look for aws-cpp-sdk-s3. AC_LANG_PUSH(C++) AC_CHECK_HEADERS([aws/s3/S3Client.h], [AC_DEFINE([ENABLE_S3], [1], [Whether to enable S3 support via aws-sdk-cpp.]) enable_s3=1], [AC_DEFINE([ENABLE_S3], [0], [Whether to enable S3 support via aws-sdk-cpp.]) enable_s3=]) AC_SUBST(ENABLE_S3, [$enable_s3]) AC_LANG_POP(C++) if test -n "$enable_s3"; then declare -a aws_version_tokens=($(printf '#include <aws/core/VersionConfig.h>\nAWS_SDK_VERSION_STRING' | $CPP $CPPFLAGS - | grep -v '^#.*' | sed 's/"//g' | tr '.' ' ')) AC_DEFINE_UNQUOTED([AWS_VERSION_MAJOR], ${aws_version_tokens@<:@0@:>@}, [Major version of aws-sdk-cpp.]) AC_DEFINE_UNQUOTED([AWS_VERSION_MINOR], ${aws_version_tokens@<:@1@:>@}, [Minor version of aws-sdk-cpp.]) AC_DEFINE_UNQUOTED([AWS_VERSION_PATCH], ${aws_version_tokens@<:@2@:>@}, [Patch version of aws-sdk-cpp.]) fi # Whether to use the Boehm garbage collector. AC_ARG_ENABLE(gc, AS_HELP_STRING([--enable-gc],[enable garbage collection in the Nix expression evaluator (requires Boehm GC) [default=yes]]), gc=$enableval, gc=yes) if test "$gc" = yes; then PKG_CHECK_MODULES([BDW_GC], [bdw-gc]) CXXFLAGS="$BDW_GC_CFLAGS $CXXFLAGS" AC_DEFINE(HAVE_BOEHMGC, 1, [Whether to use the Boehm garbage collector.]) fi if test "$tests" = yes; then # Look for gtest. PKG_CHECK_MODULES([GTEST], [gtest_main]) # Look for rapidcheck. AC_ARG_VAR([RAPIDCHECK_HEADERS], [include path of gtest headers shipped by RAPIDCHECK]) # No pkg-config yet, https://github.com/emil-e/rapidcheck/issues/302 AC_LANG_PUSH(C++) AC_SUBST(RAPIDCHECK_HEADERS) [CXXFLAGS="-I $RAPIDCHECK_HEADERS $CXXFLAGS"] [LIBS="-lrapidcheck -lgtest $LIBS"] AC_CHECK_HEADERS([rapidcheck/gtest.h], [], [], [#include <gtest/gtest.h>]) dnl AC_CHECK_LIB doesn't work for C++ libs with mangled symbols AC_LINK_IFELSE([ AC_LANG_PROGRAM([[ #include <gtest/gtest.h> #include <rapidcheck/gtest.h> ]], [[ return RUN_ALL_TESTS(); ]]) ], [], [AC_MSG_ERROR([librapidcheck is not found.])]) AC_LANG_POP(C++) fi # Look for nlohmann/json. PKG_CHECK_MODULES([NLOHMANN_JSON], [nlohmann_json >= 3.9]) # documentation generation switch AC_ARG_ENABLE(doc-gen, AS_HELP_STRING([--disable-doc-gen],[disable documentation generation]), doc_generate=$enableval, doc_generate=yes) AC_SUBST(doc_generate) # Look for lowdown library. PKG_CHECK_MODULES([LOWDOWN], [lowdown >= 0.9.0], [CXXFLAGS="$LOWDOWN_CFLAGS $CXXFLAGS"]) # Setuid installations. AC_CHECK_FUNCS([setresuid setreuid lchown]) # Nice to have, but not essential. AC_CHECK_FUNCS([strsignal posix_fallocate sysconf]) AC_ARG_WITH(sandbox-shell, AS_HELP_STRING([--with-sandbox-shell=PATH],[path of a statically-linked shell to use as /bin/sh in sandboxes]), sandbox_shell=$withval) AC_SUBST(sandbox_shell) if test ${cross_compiling:-no} = no && ! test -z ${sandbox_shell+x}; then AC_MSG_CHECKING([whether sandbox-shell has the standalone feature]) # busybox shell sometimes allows executing other busybox applets, # even if they are not in the path, breaking our sandbox if PATH= $sandbox_shell -c "busybox" 2>&1 | grep -qv "not found"; then AC_MSG_RESULT(enabled) AC_MSG_ERROR([Please disable busybox FEATURE_SH_STANDALONE]) else AC_MSG_RESULT(disabled) fi fi AC_ARG_ENABLE(embedded-sandbox-shell, AS_HELP_STRING([--enable-embedded-sandbox-shell],[include the sandbox shell in the Nix binary [default=no]]), embedded_sandbox_shell=$enableval, embedded_sandbox_shell=no) AC_SUBST(embedded_sandbox_shell) if test "$embedded_sandbox_shell" = yes; then AC_DEFINE(HAVE_EMBEDDED_SANDBOX_SHELL, 1, [Include the sandbox shell in the Nix binary.]) fi # Expand all variables in config.status. test "$prefix" = NONE && prefix=$ac_default_prefix test "$exec_prefix" = NONE && exec_prefix='${prefix}' for name in $ac_subst_vars; do declare $name="$(eval echo "${!name}")" declare $name="$(eval echo "${!name}")" declare $name="$(eval echo "${!name}")" done rm -f Makefile.config AC_CONFIG_HEADERS([config.h]) AC_CONFIG_FILES([]) AC_OUTPUT