cmake: emscripten experimental support

.github/workflows/amd64_web.yml

@@ -0,0 +1,22 @@
+# ref: https://github.com/docker-library/official-images
+name: amd64 Web
+
+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+  Distros:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Check docker
+      run: |
+        docker info
+        docker buildx ls
+    - name: Build env image
+      run: make --directory=cmake web_env
+    - name: Build devel project
+      run: make --directory=cmake web_devel
+    - name: Build project
+      run: make --directory=cmake web_build
+    - name: Test project
+      run: make --directory=cmake web_test

cmake/Makefile

@@ -392,6 +392,46 @@ $(foreach stage,$(TOOLCHAIN_STAGES),$(eval $(call toolchain-stage-target,$(stage
 clean_toolchains: $(addprefix clean_toolchain_, $(TOOLCHAIN_STAGES))
 	-rmdir $(addprefix cache/, $(TOOLCHAIN_TARGETS))
 
+#########
+## WEB ##
+#########
+WEB_STAGES := env devel build test
+
+define make-web-stage-target =
+#$$(info STAGE: $1)
+#$$(info Create target: web_$1.)
+.PHONY: web_$1
+web_$1: docker/web/Dockerfile
+	#@docker image rm -f ${IMAGE}:web_$1 2>/dev/null
+	${DOCKER_BUILD_CMD} --target=$1 --tag ${IMAGE}:web_$1 -f $$< ..
+
+#$$(info Create target: save_web_$1 (debug).)
+.PHONY: save_web_$1
+save_web_$1: cache/web/docker_$1.tar
+cache/web/docker_$1.tar: web_$1
+	@rm -f $$@
+	mkdir -p cache/web
+	docker save ${IMAGE}:web_$1 -o $$@
+
+#$$(info Create target: sh_web_$1 (debug).)
+.PHONY: sh_web_$1
+sh_web_$1: web_$1
+	${DOCKER_RUN_CMD} -it --name ${IMAGE}_web_$1 ${IMAGE}:web_$1
+
+#$$(info Create target: clean_web_$1.)
+.PHONY: clean_web_$1
+clean_web_$1:
+	docker image rm -f ${IMAGE}:web_$1 2>/dev/null
+	rm -f cache/web/docker_$1.tar
+endef
+
+$(foreach stage,$(WEB_STAGES),$(eval $(call make-web-stage-target,$(stage))))
+
+## MERGE ##
+.PHONY: clean_web
+clean_web: $(addprefix clean_web_, $(WEB_STAGES))
+	rm -f cache/web
+
 #############
 ## VAGRANT ##
 #############
@@ -451,7 +491,7 @@ $(clean_glop_targets): clean_glop_%
 ###########
 ## CLEAN ##
 ###########
-targets = $(addprefix clean_, $(DISTROS))
+targets = $(addprefix clean_, $(DISTROS)) clean_web
 vms = $(addprefix clean_, $(VMS))
 glops = $(addprefix clean_glop_, $(STAGES))
 .PHONY: clean $(targets)

cmake/docker/web/Dockerfile

@@ -0,0 +1,24 @@
+# Create a virtual environment with all tools installed
+# ref: https://hub.docker.com/_/archlinux/
+FROM archlinux:latest AS env
+# Install system build dependencies
+ENV PATH=/usr/local/bin:$PATH
+RUN pacman -Syu --noconfirm git base-devel cmake
+RUN cmake -version
+RUN pacman -Syu --noconfirm nodejs emscripten
+ENV PATH=/usr/lib/emscripten:$PATH
+RUN emcc -v
+
+# Add the library src to our build env
+FROM env AS devel
+WORKDIR /home/project
+COPY . .
+
+FROM devel AS build
+RUN emcmake cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Release -DBUILD_DEPS=ON
+RUN cmake --build build --target all -v
+#RUN cmake --build build --target install -v
+
+FROM build AS test
+#RUN CTEST_OUTPUT_ON_FAILURE=1 cmake --build build --target test
+RUN cd build && ctest -V

ortools/base/sysinfo.cc

@@ -47,7 +47,7 @@ int64_t GetProcessMemoryUsage() {
   int64_t resident_memory = t_info.resident_size;
   return resident_memory;
 }
-#elif defined(__GNUC__) && !defined(__FreeBSD__)  // LINUX
+#elif defined(__GNUC__) && !defined(__FreeBSD__) && !defined(__EMSCRIPTEN__) // LINUX
 int64_t GetProcessMemoryUsage() {
   unsigned size = 0;
   char buf[30];