Ninja buildsystem produces working bootloader

generate_build.py

@@ -14,9 +14,9 @@ MODULES = {
 
     "makerd":    program('src/tools/makerd', ["initrd", "kutil"], "makerd", ["native"]),
 
-    "nulldrv":   program('src/drivers/nulldrv', [], "nulldrv", ["host"]),
+    "boot":      program('src/boot', [], "boot.elf", ["boot"]),
 
-    "boot":      program('src/boot', ["elf"], "boot.elf", ["host"]),
+    "nulldrv":   program('src/drivers/nulldrv', [], "nulldrv", ["host"]),
     "kernel":    program('src/kernel', ["elf", "initrd", "kutil"], "popcorn.elf", ["host"]),
 }
 

scripts/templates/build.ninja.j2

@@ -65,7 +65,7 @@ rule nasm
 
 rule exe
     description = Linking $name
-    command = $ld -o $out $in $libs
+    command = $ld $ldflags -o $out $in $libs
 
 rule lib
     description = Archiving $name
@@ -127,7 +127,7 @@ build $builddir/popcorn.fat : cp $srcroot/assets/ovmf/x64/OVMF.fd
 build $builddir/fatroot/popcorn.elf : cp $builddir/host/popcorn.elf
     name = kernel to FAT image
 
-build $builddir/fatroot/efi/boot/bootx64.efi : cp $builddir/host/boot.efi
+build $builddir/fatroot/efi/boot/bootx64.efi : cp $builddir/boot/boot.efi
     name = bootloader to FAT image
 
 build $builddir/fatroot/initrd.img : makerd ${srcroot}/assets/initrd.toml | $

scripts/templates/program.boot.ninja.j2

@@ -2,7 +2,11 @@
 {% block variables %}
 {{ super() }}
 
-cflags = $cflags $
+ld = ld
+cc = clang
+cxx = clang++
+
+ccflags = $ccflags $
     -DKERNEL_FILENAME=L\"popcorn.elf\" $
     -DGNU_EFI_USE_MS_ABI $
     -DHAVE_USE_MS_ABI $
@@ -12,8 +16,8 @@ cflags = $cflags $
     -fshort-wchar
 
 ldflags = $ldflags $
-    -shared $
-    -T ${srcroot}/src/arch/x86_64/boot.ld
+    -T ${srcroot}/src/arch/x86_64/boot.ld $
+    -shared
 
 {% endblock %}
 

scripts/templates/program.kernel.ninja.j2

@@ -3,7 +3,7 @@
 {{ super() }}
 
 asflags = $asflags -I${srcroot}/src/kernel/
-libs = $libs -lc
+libs = $libs
 ldflags = $ldflags -T ${srcroot}/src/arch/x86_64/kernel.ld
 
 {% endblock %}

scripts/templates/target.boot.ninja.j2

@@ -0,0 +1,35 @@
+{% extends "target.default.ninja.j2" %}
+
+{% block binaries %}
+ld = ld
+cc = clang
+cxx = clang++
+nasm = nasm
+{% endblock %}
+
+{% block variables %}
+
+ccflags = $ccflags $
+    -ggdb $
+    -nostdlib $
+    -ffreestanding $
+    -nodefaultlibs $
+    -fno-builtin $
+    -mno-sse $
+    -fno-omit-frame-pointer $
+    -mno-red-zone
+
+cxxflags = $cxxflags $
+    -nostdlibinc $
+    -isystem${srcroot}/sysroot/include/c++/v1 $
+    -fno-exceptions $
+    -fno-rtti
+
+ldflags = $ldflags $
+    -g $
+    -nostdlib $
+    -znocombreloc $
+	-Bsymbolic $
+    -nostartfiles
+
+{% endblock %}

scripts/templates/target.host.ninja.j2

@@ -35,7 +35,6 @@ ldflags = $ldflags $
     -nostdlib $
     -nostartfiles $
     -znocombreloc $
-    -Bsymbolic $
     -nostartfiles
 
 {% endblock %}