[build] Add build knowledge of dynamic libraries

Bonnibel will now build dynamic libraries when they're dependencies for
non-statically linked modules. It will also copy those shared libraries
into the initrd image for programs being copied into the image.

assets/build/rules.ninja

@@ -1,5 +1,3 @@
-# This file is automatically generated by bonnibel
-
 rule compile.c
   command = $cc -MMD -MF $out.d $cflags $ccflags -o $out -c $in
   description = Compiling [$target]:$name
@@ -42,15 +40,19 @@ rule parse.cog
 
 rule exe
   command = $ld $ldflags -o $out $in $libs
-  description = Linking $name
-
-rule lib
-  command = $ar qcs $out $in
-  description = Archiving [$target]:$name
+  description = Linking exe [$target]:$name
 
 rule driver
-  command = $ld $ldflags -shared -o $out $in $libs
-  description = Linking $name
+  command = $ld $ldflags -o $out $in $libs
+  description = Linking driver [$target]:$name
+
+rule lib
+  command = $ld -shared $ldflags -o $out $in $libs
+  description = Linking [$target]:$name
+
+rule lib_static
+  command = $ar qcs $out $in
+  description = Archiving [$target]:$name
 
 rule cp
   command = cp $in $out

assets/build/target.user.exe.yaml

@@ -5,6 +5,6 @@ ccflags: [
 
 ldflags: [
   "-pie",
-  "--dynamic-linker", "/jsix/tools/ld.so",
-  "-lc++", "-lc++abi", "-lunwind",
+  "--dynamic-linker", "/jsix/lib/ld.so",
+  "--push-state", "--as-needed", "-Bstatic", "-lc++", "-lc++abi", "-lunwind", "--pop-state",
 ]

assets/build/target.user.yaml

@@ -15,6 +15,7 @@ ccflags: [
   "-U__linux__",
 
   "--sysroot='${source_root}/sysroot'",
+  "-fpic",
 ]
 
 cxxflags: [
@@ -29,5 +30,4 @@ ldflags: [
   "-L", "${source_root}/sysroot/lib",
   "-z", "separate-code",
   "--no-dependent-libraries",
-  "-Bstatic",
 ]