Moving to a ninja-based build system

scripts/templates/build.ninja.j2

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+builddir = {{ buildroot }}
+srcroot = {{ srcroot }}
+
+ccflags = $
+    -I${srcroot}/src/include $
+    -I${srcroot}/src/include/x86_64 $
+    -DVERSION_MAJOR={{ version.major }} $
+    -DVERSION_MINOR={{ version.minor }} $
+    -DVERSION_PATCH={{ version.patch }} $
+    -DVERSION_GITSHA=\"{{ version.sha }}\" $
+    -DGIT_VERSION=\"{{ version.major }}.{{ version.minor }}.{{ version.patch }}-{{ version.sha }}\"
+
+asflags = $
+    -DVERSION_MAJOR={{ version.major }} $
+    -DVERSION_MINOR={{ version.minor }} $
+    -DVERSION_PATCH={{ version.patch }} $
+    -DVERSION_GITSHA=\"{{ version.sha }}\"
+
+cflags = -std=c11
+cxxflags = -std=c++14
+libs =
+
+rule cc
+    deps = gcc
+    depfile = $out.d
+    description = Compiling $name
+    command = $cc -MMD -MF $out.d $ccflags $cflags -o $out -c $in
+
+rule cxx
+    deps = gcc
+    depfile = $out.d
+    description = Compiling $name
+    command = $cxx -MMD -MF $out.d $cxxflags $ccflags -o $out -c $in
+
+rule nasm
+    deps = gcc
+    depfile = $out.d
+    description = Assembling $name
+    command = $nasm -o $out -felf64 -MD $out.d $asflags $in
+
+rule exe
+    description = Linking $name
+    command = $ld -o $out $in $libs
+
+rule lib
+    description = Archiving $name
+    command = $ar qcs $out $in
+
+{% for target in targets %}
+subninja {{ target }}/target.ninja
+{% endfor %}
+
+# vim: et ts=4 sts=4 sw=4
+

scripts/templates/library.default.ninja.j2

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+{% extends "module.base.ninja.j2" %}

scripts/templates/module.base.ninja.j2

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+moddir = ${builddir}/{{ name }}.dir
+
+{% block variables %}
+ccflags = $ccflags $
+    {%- for dep in module.deps %}
+    -I${srcroot}/src/libraries/{{ dep }}/include $
+    {%- endfor %}
+    -I${srcroot}/{{ module.path }} $
+    -I${srcroot}/{{ module.path }}/include
+{% endblock %}
+
+{% for source in sources %}
+build ${moddir}/{{ source.output }} : {{ source.action }} {{ source.input }}
+    name = {{ source.name }}
+{% endfor %}
+
+build {% block artifact %} ${builddir}/lib{{ name }}.a : lib {% endblock %} $
+{%- block extrasources %}{% endblock -%}
+{%- for source in sources %}
+    ${moddir}/{{ source.output }}{% if not loop.last %} ${% endif %}
+{%- endfor -%}
+{%- if module.deps %}| {% for dep in module.deps %} ${builddir}/lib{{ dep }}.a {% endfor %}{% endif %}
+    name = {{ name }}
+
+# End
+

scripts/templates/program.boot.ninja.j2

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+{% extends "program.default.ninja.j2" %}
+{% block variables %}
+{{ super() }}
+
+cflags = $cflags $
+	-DKERNEL_FILENAME=L\"popcorn.elf\" $
+	-DGNU_EFI_USE_MS_ABI $
+	-DHAVE_USE_MS_ABI $
+	-DEFI_DEBUG=0 $
+	-DEFI_DEBUG_CLEAR_MEMORY=0 $
+	-fPIC $
+	-fshort-wchar
+
+ldflags = $ldflags $
+	-shared $
+	-T ${srcroot}/src/arch/x86_64/boot.ld
+
+{% endblock %}

scripts/templates/program.default.ninja.j2

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+{% extends "module.base.ninja.j2" %}
+{% block variables %}
+{{ super() }}
+
+libs = $
+	-L${builddir} $
+    {%- for dep in module.deps %}
+    -l{{dep}} $
+    {%- endfor %}
+	$libs
+
+{% endblock %}
+{% block artifact %}{{ module.output }} : exe{% endblock %}

scripts/templates/program.kernel.ninja.j2

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+{% extends "program.default.ninja.j2" %}
+{% block variables %}
+{{ super() }}
+
+asflags = $asflags -I${srcroot}/src/kernel/
+libs = $libs -lc
+
+{% endblock %}

scripts/templates/target.default.ninja.j2

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+builddir = $builddir/{{ target }}
+
+{% block variables %}
+{% endblock %}
+
+{% block binaries %}
+cc = clang
+cxx = clang++
+ld = clang++
+ar = ar
+nasm = nasm
+{% endblock %}
+
+{% for module in modules %}
+subninja {{ module }}.ninja
+{% endfor %}

scripts/templates/target.host.ninja.j2

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+{% extends "target.default.ninja.j2" %}
+{% block binaries %}
+cc = ${srcroot}/sysroot/bin/clang
+cxx = ${srcroot}/sysroot/bin/clang++
+ld = ${srcroot}/sysroot/bin/x86_64-elf-ld
+ar = ${srcroot}/sysroot/bin/x86_64-elf-ar
+nasm = ${srcroot}/sysroot/bin/nasm
+{% endblock %}
+
+{% block variables %}
+
+ccflags = $ccflags $
+    -D__ELF__ $
+    -nodefaultlibs $
+    -nostdinc $
+    -nostdlib $
+    -ffreestanding $
+    -mno-sse $
+    -fno-omit-frame-pointer $
+    -mno-red-zone $
+    -mcmodel=large $
+    -isystem${srcroot}/sysroot/include $
+    --sysroot="${srcroot}/sysroot"
+
+cxxflags = $cxxflags $
+    -nostdlibinc $
+    -isystem${srcroot}/sysroot/include/c++/v1 $
+    -fno-exceptions $
+    -fno-rtti
+
+ldflags = $ldflags $
+    -g $
+    -nostdlib $
+    -nostartfiles $
+    -znocombreloc $
+    -Bsymbolic $
+    -nostartfiles
+
+{% endblock %}

scripts/templates/target.native.ninja.j2

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+{% extends "target.default.ninja.j2" %}