Tweak up compile flags

- Remove unnecessary `-x c++`.
 - Improve rebuild speed by caching:
   - Remove `-f` from `autoreconf` to reuse generated configure scripts.
   - Remove `--rm` from `docker run` to avoid rebuilding Emscripten stdlib.
   - Add `-C` to `./configure` to reuse stored information about `emcc`.
   - Remove `rm -rf build` from WebP encoder/decoder.

codecs/hqx/package.json

@@ -2,6 +2,6 @@
   "name": "hqx",
   "scripts": {
     "build:image": "docker build -t squoosh-hqx .",
-    "build": "docker run --rm -v $(pwd):/src squoosh-hqx ./build.sh"
+    "build": "docker run -v $(pwd):/src squoosh-hqx ./build.sh"
   }
 }

codecs/imagequant/build.sh

@@ -29,7 +29,6 @@ echo "============================================="
     -I node_modules/libimagequant \
     -o ./imagequant.js \
     --std=c++11 \
-    -x c++ \
     imagequant.cpp \
     node_modules/libimagequant/libimagequant.a
 )

codecs/imagequant/package.json

@@ -2,7 +2,7 @@
   "name": "imagequant",
   "scripts": {
     "install": "napa",
-    "build": "docker run --rm -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
+    "build": "docker run -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
   },
   "napa": {
     "libimagequant": "ImageOptim/libimagequant#2.12.1"

codecs/mozjpeg_enc/build.sh

@@ -15,9 +15,9 @@ echo "Compiling mozjpeg"
 echo "============================================="
 (
   cd node_modules/mozjpeg
-  autoreconf -fiv
-  emconfigure ./configure --without-simd
-  emmake make libjpeg.la -j`nproc`
+  autoreconf -iv
+  emconfigure ./configure -C --without-simd
+  emmake make libjpeg.la rdswitch.o -j`nproc`
 )
 echo "============================================="
 echo "Compiling mozjpeg done"
@@ -31,18 +31,15 @@ echo "============================================="
     --bind \
     ${OPTIMIZE} \
     --closure 1 \
-    -s WASM=1 \
     -s ALLOW_MEMORY_GROWTH=1 \
     -s MODULARIZE=1 \
     -s 'EXPORT_NAME="mozjpeg_enc"' \
     -I node_modules/mozjpeg \
     -o ./mozjpeg_enc.js \
-    -Wno-deprecated-register \
-    -Wno-writable-strings \
-    node_modules/mozjpeg/rdswitch.c \
-    -x c++ -std=c++11 \
+    -std=c++11 \
     mozjpeg_enc.cpp \
-    node_modules/mozjpeg/.libs/libjpeg.a
+    node_modules/mozjpeg/.libs/libjpeg.a \
+    node_modules/mozjpeg/rdswitch.o
 )
 echo "============================================="
 echo "Compiling wasm bindings done"

codecs/mozjpeg_enc/mozjpeg_enc.cpp

@@ -7,7 +7,10 @@
 #include <string.h>
 #include "config.h"
 #include "jpeglib.h"
+
+extern "C" {
 #include "cdjpeg.h"
+}
 
 using namespace emscripten;
 

codecs/mozjpeg_enc/package.json

@@ -2,7 +2,7 @@
   "name": "mozjpeg_enc",
   "scripts": {
     "install": "napa",
-    "build": "docker run --rm -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
+    "build": "docker run -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
   },
   "napa": {
     "mozjpeg": "mozilla/mozjpeg#v3.3.1"

codecs/oxipng/package.json

@@ -2,6 +2,6 @@
   "name": "oxipng",
   "scripts": {
     "build:image": "docker build -t squoosh-oxipng .",
-    "build": "docker run --rm -v $(pwd):/src squoosh-oxipng ./build.sh"
+    "build": "docker run -v $(pwd):/src squoosh-oxipng ./build.sh"
   }
 }

codecs/resize/package.json

@@ -2,6 +2,6 @@
   "name": "resize",
   "scripts": {
     "build:image": "docker build -t squoosh-resize .",
-    "build": "docker run --rm -v $(pwd):/src squoosh-resize ./build.sh"
+    "build": "docker run -v $(pwd):/src squoosh-resize ./build.sh"
   }
 }

codecs/rotate/package.json

@@ -2,7 +2,7 @@
   "name": "rotate",
   "scripts": {
     "build:image": "docker build -t squoosh-rotate .",
-    "build": "docker run --rm -v $(pwd):/src squoosh-rotate ./build.sh",
+    "build": "docker run -v $(pwd):/src squoosh-rotate ./build.sh",
     "benchmark": "echo File size after gzip && npm run benchmark:filesize && echo Optimizing && npm run -s benchmark:optimizing",
     "benchmark:baseline": "v8 --liftoff --no-wasm-tier-up --no-opt ./benchmark.js",
     "benchmark:optimizing": "v8 --no-liftoff --no-wasm-tier-up ./benchmark.js",

codecs/webp_dec/build.sh

@@ -14,10 +14,8 @@ echo "Compiling libwebp"
 echo "============================================="
 test -n "$SKIP_LIBWEBP" || (
   cd node_modules/libwebp
-  autoreconf -fiv
-  rm -rf build || true
-  mkdir -p build && cd build
-  emconfigure ../configure \
+  autoreconf -iv
+  emconfigure ./configure -C \
     --disable-libwebpdemux \
     --disable-wic \
     --disable-gif \
@@ -44,12 +42,10 @@ echo "============================================="
     -s ALLOW_MEMORY_GROWTH=1 \
     -s MODULARIZE=1 \
     -s 'EXPORT_NAME="webp_dec"' \
-    --std=c++11 \
     -I node_modules/libwebp \
     -o ./webp_dec.js \
-    -x c++ \
     webp_dec.cpp \
-    node_modules/libwebp/build/src/.libs/libwebp.a
+    node_modules/libwebp/src/.libs/libwebp.a
 )
 echo "============================================="
 echo "Compiling wasm bindings done"

codecs/webp_dec/package.json

@@ -2,7 +2,7 @@
   "name": "webp_dec",
   "scripts": {
     "install": "napa",
-    "build": "docker run --rm -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
+    "build": "docker run -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
   },
   "napa": {
     "libwebp": "webmproject/libwebp#v1.0.2"

codecs/webp_enc/build.sh

@@ -15,10 +15,8 @@ echo "Compiling libwebp"
 echo "============================================="
 test -n "$SKIP_LIBWEBP" || (
   cd node_modules/libwebp
-  autoreconf -fiv
-  rm -rf build || true
-  mkdir -p build && cd build
-  emconfigure ../configure \
+  autoreconf -iv
+  emconfigure ./configure -C \
     --disable-libwebpdemux \
     --disable-wic \
     --disable-gif \
@@ -45,12 +43,10 @@ echo "============================================="
     -s ALLOW_MEMORY_GROWTH=1 \
     -s MODULARIZE=1 \
     -s 'EXPORT_NAME="webp_enc"' \
-    --std=c++11 \
     -I node_modules/libwebp \
     -o ./webp_enc.js \
-    -x c++ \
     webp_enc.cpp \
-    node_modules/libwebp/build/src/.libs/libwebp.a
+    node_modules/libwebp/src/.libs/libwebp.a
 )
 echo "============================================="
 echo "Compiling wasm bindings done"

codecs/webp_enc/package.json

@@ -2,7 +2,7 @@
   "name": "webp_enc",
   "scripts": {
     "install": "napa",
-    "build": "docker run --rm -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
+    "build": "docker run -v $(pwd):/src trzeci/emscripten-upstream ./build.sh"
   },
   "napa": {
     "libwebp": "webmproject/libwebp#v1.0.2"