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1f306c90e2451ef54d408fb815d22b54dbdbd403
janet/meson.build
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Calvin Rose 486f980579 First draft flow typing analysis and OVM stub. 
In order to further optimize bytecode, we need
to do some static analysis to annotate the assembly with
types. First (untested) draft of this idea that works by scanning
the bytecode instructions in order, keeping track of bitsets of possible
types for each active slot. We also record all possible types that go
through the inputs and come out of the outputs of each instruction.

When we hit a conditional branch, we save one side of the branch to a
stack to continue later, using a hash map of states to avoid infinite
stack growth. We then continue with the other side of the branch as
normal.

When we are finished with the current exectution trace, pop a state from
the stack and start over. We repeat this until the stack is empty.
(Still need some short-circuit conditions to prevent searching
 incredibly large state space - for example, just add one more maximally
 vague trace after a limit of N iterations).

Once the stack is empty, we have should have annotations on the possible
input and output types of each instruction, as well as other information
such as can the instruction possibly error, did it ever continue to
the next instruction, or did this instruction ever execute at all.

Untested, almost certainly full of bugs big and small.
2026-09-06 18:02:05 -05:00

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# Copyright (c) 2026 Calvin Rose and contributors
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
project('janet', 'c',
default_options : ['c_std=c99', 'build.c_std=c99', 'b_lundef=false', 'default_library=both'],
version : '1.42.1')
# Global settings
janet_path = join_paths(get_option('prefix'), get_option('libdir'), 'janet')
header_path = join_paths(get_option('prefix'), get_option('includedir'), 'janet')
# Compilers
cc = meson.get_compiler('c')
native_cc = meson.get_compiler('c', native : true)
# Native deps
native_m_dep = native_cc.find_library('m', required : false)
native_dl_dep = native_cc.find_library('dl', required : false)
native_android_spawn_dep = native_cc.find_library('android-spawn', required : false)
native_thread_dep = dependency('threads', native : true)
# Deps
m_dep = cc.find_library('m', required : false)
dl_dep = cc.find_library('dl', required : false)
# for MINGW/MSYS2
native_ws2_dep = native_cc.find_library('ws2_32', required: false)
native_psapi_dep = native_cc.find_library('psapi', required: false)
native_wsock_dep = native_cc.find_library('wsock32', required: false)
ws2_dep = cc.find_library('ws2_32', required: false)
psapi_dep = cc.find_library('psapi', required: false)
wsock_dep = cc.find_library('wsock32', required: false)
android_spawn_dep = cc.find_library('android-spawn', required : false)
thread_dep = dependency('threads')
# Link options
if get_option('default_library') != 'static' and build_machine.system() != 'windows'
add_project_link_arguments('-rdynamic', language : 'c')
endif
# Generate custom janetconf.h
conf = configuration_data()
version_parts = meson.project_version().split('.')
last_parts = version_parts[2].split('-')
if last_parts.length() > 1
conf.set_quoted('JANET_VERSION_EXTRA', '-' + last_parts[1])
else
conf.set_quoted('JANET_VERSION_EXTRA', '')
endif
conf.set('JANET_VERSION_MAJOR', version_parts[0].to_int())
conf.set('JANET_VERSION_MINOR', version_parts[1].to_int())
conf.set('JANET_VERSION_PATCH', last_parts[0].to_int())
conf.set_quoted('JANET_VERSION', meson.project_version())
# Use options
conf.set_quoted('JANET_BUILD', get_option('git_hash'))
conf.set('JANET_NO_NANBOX', not get_option('nanbox'))
if get_option('nanbox_pointer_shift') != -1 # -1 is auto-detect
conf.set('JANET_NANBOX_64_POINTER_SHIFT', get_option('nanbox_pointer_shift'))
endif
conf.set('JANET_SINGLE_THREADED', get_option('single_threaded'))
conf.set('JANET_NO_DYNAMIC_MODULES', not get_option('dynamic_modules'))
conf.set('JANET_NO_DOCSTRINGS', not get_option('docstrings'))
conf.set('JANET_NO_SOURCEMAPS', not get_option('sourcemaps'))
conf.set('JANET_NO_ASSEMBLER', not get_option('assembler'))
conf.set('JANET_NO_PEG', not get_option('peg'))
conf.set('JANET_NO_NET', not get_option('net'))
conf.set('JANET_NO_IPV6', not get_option('ipv6'))
conf.set('JANET_NO_EV', not get_option('ev') or get_option('single_threaded'))
conf.set('JANET_REDUCED_OS', get_option('reduced_os'))
conf.set('JANET_NO_INT_TYPES', not get_option('int_types'))
conf.set('JANET_PRF', get_option('prf'))
conf.set('JANET_RECURSION_GUARD', get_option('recursion_guard'))
conf.set('JANET_MAX_PROTO_DEPTH', get_option('max_proto_depth'))
conf.set('JANET_MAX_MACRO_EXPAND', get_option('max_macro_expand'))
conf.set('JANET_STACK_MAX', get_option('stack_max'))
conf.set('JANET_NO_UMASK', not get_option('umask'))
conf.set('JANET_NO_REALPATH', not get_option('realpath'))
conf.set('JANET_NO_PROCESSES', not get_option('processes'))
conf.set('JANET_SIMPLE_GETLINE', get_option('simple_getline'))
conf.set('JANET_EV_NO_EPOLL', not get_option('epoll'))
conf.set('JANET_EV_NO_KQUEUE', not get_option('kqueue'))
conf.set('JANET_NO_INTERPRETER_INTERRUPT', not get_option('interpreter_interrupt'))
conf.set('JANET_NO_FFI', not get_option('ffi'))
conf.set('JANET_NO_FFI_JIT', not get_option('ffi_jit'))
conf.set('JANET_NO_FILEWATCH', not get_option('filewatch'))
conf.set('JANET_NO_CRYPTORAND', not get_option('cryptorand'))
if get_option('os_name') != ''
conf.set('JANET_OS_NAME', get_option('os_name'))
endif
if get_option('arch_name') != ''
conf.set('JANET_ARCH_NAME', get_option('arch_name'))
endif
if get_option('thread_local_prefix') != ''
conf.set('JANET_THREAD_LOCAL', get_option('thread_local_prefix'))
endif
jconf = configure_file(output : 'janetconf.h',
configuration : conf)
# Include directories
incdir = include_directories(['src/include', '.'])
# Order is important here, as some headers
# depend on other headers for the amalg target
core_headers = [
'src/core/features.h',
'src/core/util.h',
'src/core/state.h',
'src/core/gc.h',
'src/core/vector.h',
'src/core/fiber.h',
'src/core/regalloc.h',
'src/core/compile.h',
'src/core/emit.h',
'src/core/symcache.h'
]
core_src = [
'src/core/abstract.c',
'src/core/array.c',
'src/core/asm.c',
'src/core/buffer.c',
'src/core/bytecode.c',
'src/core/capi.c',
'src/core/cfuns.c',
'src/core/compile.c',
'src/core/corelib.c',
'src/core/debug.c',
'src/core/emit.c',
'src/core/ev.c',
'src/core/ffi.c',
'src/core/fiber.c',
'src/core/filewatch.c',
'src/core/gc.c',
'src/core/inttypes.c',
'src/core/io.c',
'src/core/marsh.c',
'src/core/math.c',
'src/core/net.c',
'src/core/os.c',
'src/core/ovm.c',
'src/core/parse.c',
'src/core/peg.c',
'src/core/pp.c',
'src/core/regalloc.c',
'src/core/run.c',
'src/core/specials.c',
'src/core/state.c',
'src/core/string.c',
'src/core/strtod.c',
'src/core/struct.c',
'src/core/symcache.c',
'src/core/table.c',
'src/core/tuple.c',
'src/core/util.c',
'src/core/value.c',
'src/core/vector.c',
'src/core/vm.c',
'src/core/wrap.c'
]
boot_src = [
'src/boot/array_test.c',
'src/boot/boot.c',
'src/boot/buffer_test.c',
'src/boot/number_test.c',
'src/boot/system_test.c',
'src/boot/table_test.c',
]
mainclient_src = [
'src/mainclient/shell.c'
]
janet_dependencies = [m_dep, dl_dep, android_spawn_dep, ws2_dep, psapi_dep, wsock_dep]
janet_native_dependencies = [native_m_dep, native_dl_dep, native_android_spawn_dep, native_ws2_dep, native_psapi_dep, native_wsock_dep]
if not get_option('single_threaded')
janet_dependencies += thread_dep
janet_native_dependencies += native_thread_dep
endif
# Build boot binary
janet_boot = executable('janet-boot', core_src, boot_src,
include_directories : incdir,
c_args : '-DJANET_BOOTSTRAP',
dependencies : janet_native_dependencies,
native : true)
# Build janet.c
janetc = custom_target('janetc',
input : [janet_boot, 'src/boot/boot.janet'],
output : 'janet.c',
capture : true,
command : [
janet_boot, meson.current_source_dir(),
'JANET_PATH', janet_path
])
# Allow building with no shared library
if cc.has_argument('-fvisibility=hidden')
lib_cflags = ['-fvisibility=hidden']
else
lib_cflags = []
endif
if get_option('shared')
libjanet = library('janet', janetc,
include_directories : incdir,
dependencies : janet_dependencies,
version: meson.project_version(),
soversion: version_parts[0] + '.' + version_parts[1],
c_args : lib_cflags,
install : true)
# Extra c flags - adding -fvisibility=hidden matches the Makefile and
# shaves off about 10k on linux x64, likely similar on other platforms.
if cc.has_argument('-fvisibility=hidden')
extra_cflags = ['-fvisibility=hidden', '-DJANET_DLL_IMPORT']
else
extra_cflags = ['-DJANET_DLL_IMPORT']
endif
janet_mainclient = executable('janet', mainclient_src,
include_directories : incdir,
dependencies : janet_dependencies,
link_with: [libjanet],
c_args : extra_cflags,
install : true)
else
# No shared library
janet_mainclient = executable('janet', mainclient_src, janetc,
include_directories : incdir,
dependencies : janet_dependencies,
c_args : lib_cflags,
install : true)
endif
if meson.is_cross_build()
native_cc = meson.get_compiler('c', native: true)
if native_cc.has_argument('-fvisibility=hidden')
extra_native_cflags = ['-fvisibility=hidden']
else
extra_native_cflags = []
endif
janet_nativeclient = executable('janet-native', janetc, mainclient_src,
include_directories : incdir,
dependencies : janet_native_dependencies,
c_args : extra_native_cflags,
native : true)
else
janet_nativeclient = janet_mainclient
endif
# Documentation
docs = custom_target('docs',
input : ['tools/gendoc.janet'],
output : ['doc.html'],
capture : true,
command : [janet_nativeclient, '@INPUT@'])
# Tests
test_files = [
'test/suite-array.janet',
'test/suite-asm.janet',
'test/suite-boot.janet',
'test/suite-buffer.janet',
'test/suite-bundle.janet',
'test/suite-capi.janet',
'test/suite-cfuns.janet',
'test/suite-compile.janet',
'test/suite-corelib.janet',
'test/suite-debug.janet',
'test/suite-ev.janet',
'test/suite-ev2.janet',
'test/suite-ffi.janet',
'test/suite-filewatch.janet',
'test/suite-inttypes.janet',
'test/suite-io.janet',
'test/suite-marsh.janet',
'test/suite-math.janet',
'test/suite-net.janet',
'test/suite-os.janet',
'test/suite-parse.janet',
'test/suite-peg.janet',
'test/suite-pp.janet',
'test/suite-specials.janet',
'test/suite-string.janet',
'test/suite-strtod.janet',
'test/suite-struct.janet',
'test/suite-symcache.janet',
'test/suite-table.janet',
'test/suite-tuple.janet',
'test/suite-unknown.janet',
'test/suite-value.janet',
'test/suite-vm.janet'
]
foreach t : test_files
test(t, janet_nativeclient, args : files([t]), workdir : meson.current_source_dir())
endforeach
# Repl
run_target('repl', command : [janet_nativeclient])
# For use as meson subproject (wrap)
if get_option('shared')
janet_dep = declare_dependency(include_directories : incdir,
link_with : libjanet)
# pkgconfig
pkg = import('pkgconfig')
pkg.generate(libjanet,
subdirs: 'janet',
description: 'Library for the Janet programming language.')
endif
# Installation
install_man('janet.1')
install_data(sources : ['tools/.keep'], install_dir : join_paths(get_option('libdir'), 'janet'))
patched_janet = custom_target('patched-janeth',
input : ['tools/patch-header.janet', 'src/include/janet.h', jconf],
install : true,
install_dir : join_paths(get_option('includedir'), 'janet'),
build_by_default : true,
output : ['janet_' + meson.project_version() + '.h'],
command : [janet_nativeclient, '@INPUT@', '@OUTPUT@'])
# Create a version of the janet.h header that matches what jpm often expects
if meson.version().version_compare('>=0.61')
install_symlink('janet.h', pointing_to: 'janet/janet_' + meson.project_version() + '.h', install_dir: get_option('includedir'))
install_symlink('janet.h', pointing_to: 'janet_' + meson.project_version() + '.h', install_dir: join_paths(get_option('includedir'), 'janet'))
endif
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