Trying to call Julia from C

test/heat-images/c-julia/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.0)
+project(run_bmi_server C CXX)
+
+set(_cflags "-ansi -Wall -Wundef -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -O2")
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(BMIC REQUIRED IMPORTED_TARGET bmic)
+message("--   bmic include - ${BMIC_INCLUDE_DIRS}")
+include_directories(${BMIC_INCLUDE_DIRS})
+pkg_check_modules(GRPC4BMI REQUIRED grpc4bmi)
+# See https://github.com/barche/embedding-julia
+
+find_package(Julia REQUIRED)
+add_definitions(-DJULIA_ENABLE_THREADING)
+
+add_executable(run_bmi_server run_bmi_server.cc)
+
+target_include_directories(run_bmi_server PRIVATE "$<BUILD_INTERFACE:${Julia_INCLUDE_DIRS}>")
+
+target_link_libraries(run_bmi_server
+                      ${GRPC4BMI_LINK_LIBRARIES}
+                      $<BUILD_INTERFACE:${Julia_LIBRARY}>
+                      )
+
+install(TARGETS run_bmi_server
+        RUNTIME DESTINATION bin)

test/heat-images/c-julia/Dockerfile

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+# Build with
+#
+#  docker build -t heat:c-julia -f test/heat-images/c-julia/Dockerfile .
+#
+# Run with
+#
+# ipython
+# from grpc4bmi.bmi_client_docker import BmiClientDocker
+# model = BmiClientDocker('heat:c-julia', work_dir='/tmp', delay=1)
+# model.get_component_name()
+# model.get_output_var_names()
+# from pathlib import Path
+# config = Path('/tmp/heat.config.txt')
+# config.write_text('1.5, 8.0, 7, 6')
+# model.initialize(str(config))
+# model.update()
+# import numpy as np
+# model.get_value('plate_surface__temperature', np.zeros(42))
+#
+FROM julia:bullseye AS builder
+
+# Install build deps
+RUN apt-get update && apt-get install -qy git build-essential cmake autoconf libtool pkg-config libssl-dev
+
+# Compile gRPC
+WORKDIR /opt/grpc
+ARG GRPC_VERSION=v1.51.1
+RUN echo ${GRPC_VERSION}
+RUN git clone -b ${GRPC_VERSION} --depth 1 https://github.com/grpc/grpc . && git submodule update --init
+WORKDIR /opt/grpc/cmake/build
+RUN cmake -DgRPC_INSTALL=ON  -DgRPC_SSL_PROVIDER=package -DgRPC_BUILD_TESTS=OFF -DBUILD_SHARED_LIBS=ON ../.. \
+    && make -j6 && make install && ldconfig
+
+# Install bmi-cxx
+ARG BMICXX_VERSION=v2.0
+RUN git clone -b ${BMICXX_VERSION} https://github.com/csdms/bmi-cxx.git /opt/bmi-cxx
+WORKDIR /opt/bmi-cxx/build
+RUN cmake .. && make install
+
+# Install bmi-c
+ARG BMIC_VERSION=v2.1
+RUN git clone -b ${BMIC_VERSION} https://github.com/csdms/bmi-c.git /opt/bmi-c
+WORKDIR /opt/bmi-c/build
+RUN cmake .. && make install
+
+# Install heat-julia
+ARG HEAT_VERSION=80c34b4f2217599e600fe9372b1bae50e1229edf
+RUN git clone -b ${HEAT_VERSION} https://github.com/csdms/bmi-example-julia.git /opt/bmi-example-julia
+WORKDIR /opt/bmi-example-julia/build
+RUN cmake .. && make install && ldconfig
+
+# Install grpc4bmi, use commit c5cc9b9bf33b6043e8db242a07c6fb92b9c63f66
+# head of bmi2 branch, PR https://github.com/eWaterCycle/grpc4bmi/pull/124
+ARG GRPC4BMI_VERSION=c5cc9b9bf33b6043e8db242a07c6fb92b9c63f66
+RUN git clone https://github.com/eWaterCycle/grpc4bmi /opt/grpc4bmi \
+  && cd /opt/grpc4bmi && git checkout ${GRPC4BMI_VERSION}
+WORKDIR /opt/grpc4bmi/cpp/build
+RUN cmake .. && make install
+
+# Compile main
+WORKDIR /opt/grpc4bmiheatc-julia/build
+COPY test/heat-images/c-julia/run_bmi_server.cc /opt/grpc4bmiheatc-julia-julia
+COPY test/heat-images/c-julia/CMakeLists.txt /opt/grpc4bmiheatc-julia
+RUN cmake .. && make install
+
+# run container
+FROM julia:bullseye
+
+# Install runtime deps
+RUN apt-get update && apt-get install -qy libssl1.1 && rm -rf /var/lib/apt/lists/*
+
+# Copy compiled and deps
+COPY --from=builder /usr/local/bin/run_bmi_server /usr/local/bin/run_bmi_server
+COPY --from=builder /usr/local/lib/ /usr/local/lib/
+
+RUN ldconfig
+
+ENV BMI_PORT=50051
+
+ENTRYPOINT ["/usr/local/bin/run_bmi_server"]

test/heat-images/c-julia/run_bmi_server.cc

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+// #include "bmi_grpc_server.h"
+// #include <bmi.h>
+// #include "bmi_heat.h"
+#include <julia.h>
+
+int main(int argc, char* argv[])
+{
+    jl_init();
+    {
+         {
+        // Simple running Julia code
+
+        jl_eval_string("println(sqrt(2.0))");
+        }
+
+        // Bmi *model = (Bmi *) malloc(sizeof(Bmi));
+
+        // run_bmi_server(model, argc, argv);
+    }
+    int ret = 0;
+    jl_atexit_hook(ret);
+    return ret;
+}