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webgl: add --slow option to build.sh for a serial build

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--slow uses `make -j1` (one file at a time, the classic manual `make`)
instead of the default `make -j$(nproc)`. Useful for readable output or
constrained machines; parallel remains the default.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Richard Geldreich
2026-07-18 19:37:52 -04:00
parent b512234dff
commit 018cc67cd0
1 changed files with 9 additions and 4 deletions
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13
webgl/build.sh
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@@ -8,7 +8,8 @@
# ./build.sh # build both (transcoder, then encoder)
# ./build.sh transcoder # build only the transcoder
# ./build.sh encoder # build only the encoder
# ./build.sh --clean # wipe each build dir's CMake cache first
# ./build.sh --clean # make clean + wipe CMake cache first (full rebuild)
# ./build.sh --slow # serial build (plain make, one file at a time)
# ./build.sh encoder -DKTX2_ZSTANDARD=OFF -DCMAKE_BUILD_TYPE=Debug
#
# Any -D... argument is forwarded to cmake. Runnable from any directory.
@@ -25,14 +26,16 @@ die() { printf '%serror:%s %s\n' "$B$R" "$N" "$*" >&2; exit 1; }
# ---- parse args ----
CLEAN=0
SLOW=0
TARGETS=()
CMAKE_ARGS=()
for a in "$@"; do
case "$a" in
-c|--clean) CLEAN=1 ;;
--slow) SLOW=1 ;;
transcoder|encoder) TARGETS+=("$a") ;;
-D*) CMAKE_ARGS+=("$a") ;;
-h|--help) sed -n '3,14p' "$0" | sed 's/^# \{0,1\}//'; exit 0 ;;
-h|--help) sed -n '3,15p' "$0" | sed 's/^# \{0,1\}//'; exit 0 ;;
*) die "unknown argument: '$a' (try --help)" ;;
esac
done
@@ -49,12 +52,14 @@ command -v emcmake >/dev/null 2>&1 || die "emcmake not found. Activate emsdk fir
command -v cmake >/dev/null 2>&1 || die "cmake not found."
JOBS="$(nproc 2>/dev/null || echo 4)"
# --slow => serial (one file at a time, the classic `make`); otherwise all cores.
if [ "$SLOW" -eq 1 ]; then MAKEJ=(-j1); JOBDESC="serial (make -j1)"; else MAKEJ=(-j"$JOBS"); JOBDESC="make -j$JOBS"; fi
# ---- build one project ----
build_one() {
local name="$1" dir="$WEBGL_DIR/$1/build"
[ -f "$WEBGL_DIR/$1/CMakeLists.txt" ] || die "no CMakeLists.txt in webgl/$1"
info "Building $name -> $1/build (make -j$JOBS)"
info "Building $name -> $1/build ($JOBDESC)"
mkdir -p "$dir"
if [ "$CLEAN" -eq 1 ]; then
# make clean first (removes build outputs + objects via the existing build system),
@@ -66,7 +71,7 @@ build_one() {
info " removing CMake cache + build state"
rm -rf "$dir/CMakeCache.txt" "$dir/CMakeFiles"
fi
( cd "$dir" && emcmake cmake ../ "${CMAKE_ARGS[@]}" && make -j"$JOBS" )
( cd "$dir" && emcmake cmake ../ "${CMAKE_ARGS[@]}" && make "${MAKEJ[@]}" )
}
# ---- go ----