misc: Created the base Meson build system for the project

meson.build

@@ -0,0 +1,119 @@
+# This file is part of the libopencm3 project.
+#
+# Copyright (C) 2023 1BitSquared <info@1bitsquared.com>
+# Written by Rachel Mant <git@dragonmux.network>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this
+#    list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its
+#    contributors may be used to endorse or promote products derived from
+#    this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+project(
+	'libopencm3',
+	'c',
+	default_options: [
+		'c_std=c99',
+		'warning_level=3',
+		'b_ndebug=if-release',
+	],
+	version: '0.8.0',
+	license: 'GPL-3.0-or-later OR BSD-3-Clause OR MIT',
+)
+
+# Ensure we are cross-compiling and not building for the build host
+assert(meson.is_cross_build(), 'libopencm3 must be cross-compiled')
+
+# Ensure we are using a GCC compiler
+cc = meson.get_compiler('c')
+assert(cc.get_id() == 'gcc', 'libopencm3 must be compiled with GCC')
+
+# Project wide flags
+extended_warnings = [
+	'-Warith-conversion',
+	'-Wbad-function-cast',
+	# '-Wcast-align=strict',
+	'-Wcast-function-type',
+	# '-Wcast-qual',
+	# '-Wconversion',
+	'-Wdangling-else',
+	'-Wdouble-promotion',
+	'-Wduplicated-branches',
+	'-Wfloat-conversion',
+	'-Wformat-overflow=2',
+	'-Wformat-signedness',
+	'-Wformat-truncation',
+	'-Wformat=2',
+	'-Wimplicit-fallthrough',
+	'-Wmaybe-uninitialized',
+	'-Wmissing-attributes',
+	'-Wmissing-braces',
+	'-Wno-char-subscripts',
+	'-Wnull-dereference',
+	# '-Wpacked',
+	'-Wredundant-decls',
+	'-Wreturn-type',
+	'-Wsequence-point',
+	'-Wshadow=local',
+	# '-Wsign-conversion',
+	'-Wstack-protector',
+	'-Wstrict-aliasing',
+	'-Wstrict-overflow=2',
+	'-Wstring-compare',
+	'-Wstringop-overflow',
+	'-Wunknown-pragmas',
+	'-Wunsafe-loop-optimizations',
+	'-Wunsuffixed-float-constant',
+	'-Wunused-const-variable=2',
+	'-Wunused-local-typedefs',
+	'-Wunused',
+	'-Wvla-parameter',
+	# '-Wvla',
+]
+add_project_arguments(
+	cc.get_supported_arguments(extended_warnings),
+	language: 'c',
+)
+
+# Options controlling how object files are generated for linking
+common_args = [
+	'-ffunction-sections',
+	'-fdata-sections',
+]
+add_project_arguments(
+	common_args,
+	language: 'c',
+)
+
+# Grab the IRQ -> nvic.h script and Python for the include system
+python = import('python').find_installation()
+irq2nvic = [
+	python,
+	files('scripts/irq2nvic_h'),
+	'--builddir',
+	meson.current_build_dir(),
+]
+
+# Extract what we're supposed to build for and start traversing to the appropriate library
+target_platform = get_option('target')
+subdir('include')
+subdir('lib')