build: embed images with #embed, keep everything generated in build/

the cores take their genome in with c23 #embed through src/core/genome.h,
so images are plain little-endian word files (genome.bin) instead of
generated c headers. zc0 writes that format, mkgenome checks an image
against its map and shows a compiler's diagnostics when it gets them,
and the javascript vm and the editor's vm host read the same files.
src/tools/findcc.sh picks a compiler with #embed (clang 19 or gcc 15).

zc gets an embed declaration, embed "file" as [type] name, for globals
and locals: a byte string by default, char*, numbers read little-endian,
and arrays of numbers. the compiler and language server carry their
library and source texts through it, so embed.sh and the text it
spliced into compiler.zc are gone.

make writes executables to build/bin, the default map to build/core/map,
the web page to build/web and the extension staging to build/vsix, and
the genome now rebuilds when its sources change. the test suite lays
out its own map and bootstrap and reads nothing from build/.

also: rt.put_s of a byte string in zc0 images, retained function
sources no longer count as live objects, a missing include no longer
cascades into undefined-name errors, consecutive comment lines join
into one hover paragraph, and stale test fixtures follow the include
format.

1 files changed, 17 insertions, 13 deletions

diff --git a/src/tools/bootstrap-check.sh b/src/tools/bootstrap-check.sh
index a5de341..7acd74c 100755
--- a/src/tools/bootstrap-check.sh
+++ b/src/tools/bootstrap-check.sh
@@ -2,19 +2,23 @@
 # rebuild the bootstrap one stage and report what the compiler says about itself.
 # zc0 (stage 0) compiles rt+core+compiler into build/s0, s0 becomes zy0, and zy0
 # runs build.zc over the same sources to produce the image. ownership diagnostics
-# come back in the image, so print them instead of the word dump.
+# come back in place of the image; mkgenome rejects them and prints them.
 set -e
+case "${1:-}" in
+    --help|-h) printf '%s\n' 'usage: src/tools/bootstrap-check.sh' 'runs the first two bootstrap stages and prints the compiler diagnostics on its own source, or the image size.'; exit 0 ;;
+    -*) echo "bootstrap-check: unknown option $1; use --help for usage" >&2; exit 2 ;;
+esac
 cd "$(dirname "$0")/../.."
-mkdir -p bin build/s0 build/s1 build/core
-cc -O1 -w -fwrapv src/tools/zc0.c -Isrc/core -o bin/zc0
-cc -O1 -w -fwrapv src/tools/mkgenome.c -Isrc/core -o bin/mkgenome
-cp src/core/core.c src/core/io_linux.c src/core/memmap.h src/core/fops.h src/core/bops.h src/core/stack.h build/s0/
-cat src/runtime/rt.zc src/core/core.zc src/compiler/compiler.zc | bin/zc0 > build/s0/genome.h
-cc -O2 -w -fwrapv -pthread -DJTYPE=int build/s0/core.c build/s0/io_linux.c -o build/zy0
-(cat src/tools/build.zc; printf '`'; cat src/runtime/rt.zc src/core/core.zc src/compiler/compiler.zc) | build/zy0 > build/g1.bin
-if ! grep -q '^zc: ' build/g1.bin 2>/dev/null; then
-    echo "image ok: $(wc -c < build/g1.bin) bytes"
+make -s build/bin/zc0 build/bin/mkgenome
+CC=${CC:-$(sh src/tools/findcc.sh)}
+SRC="src/runtime/rt.zc src/core/core.zc src/compiler/compiler.zc"
+mkdir -p build/s0 build/s1
+cat $SRC | build/bin/zc0 > build/s0/g0.bin
+build/bin/mkgenome < build/s0/g0.bin > build/s0/genome.bin
+$CC -O2 -w -fwrapv -pthread -DJTYPE=int src/core/core.c src/core/io_linux.c -Isrc/core -Ibuild/core/map --embed-dir=build/s0 -o build/s0/zy0
+(cat src/tools/build.zc; printf '`'; cat $SRC) | build/s0/zy0 > build/s1/g1.bin
+if build/bin/mkgenome < build/s1/g1.bin > build/s1/check.bin; then
+    echo "image ok: $(wc -c < build/s1/g1.bin) bytes"
 else
-    echo "--- compiler diagnostics on its own source ---"
-    cat -v build/g1.bin
-fi
\ No newline at end of file
+    exit 1
+fi