Merge pull request #4 from AtelierArith/hello-example-without-cmake

Hello example without cmake

.github/workflows/CI.yml

@@ -38,6 +38,8 @@ jobs:
       - uses: julia-actions/cache@v1
       - name: Run hello_gcc
         run: cd hello_gcc && bash run.sh
+      - name: Run hello_gcc_cmake
+        run: cd hello_gcc && bash run.sh
       - name: Run hello_cxx
         run: cd hello_cxx && bash run.sh
       - name: Run complicatedexamples

hello_gcc/.gitignore

@@ -0,0 +1 @@
+main

hello_gcc/main.c

@@ -1,3 +1,5 @@
+// https://docs.julialang.org/en/v1/manual/embedding/
+
 #include <julia.h>
 JULIA_DEFINE_FAST_TLS // only define this once, in an executable (not in a shared library) if you want fast code.
 

hello_gcc/run.sh

@@ -1,4 +1,4 @@
 # Get Julia installation paths
-cmake -S . -B ./build -DCMAKE_BUILD_TYPE=Release
-cmake --build ./build --config Release -j `nproc`
-./build/hello
+JULIA_DIR=`julia -e 'print(dirname(Sys.BINDIR))'`
+gcc -o ./main -fPIC -I$JULIA_DIR/include/julia -L$JULIA_DIR/lib -Wl,-rpath,$JULIA_DIR/lib main.c -ljulia
+./main

hello_gcc_cmake/README.md

@@ -0,0 +1,9 @@
+# Hello World with C
+
+- Install Julia in advance
+- Just run the following command:
+
+```sh
+$ bash run.sh
+1.4142135623730951
+```

hello_gcc_cmake/main.c

@@ -0,0 +1,19 @@
+#include <julia.h>
+JULIA_DEFINE_FAST_TLS // only define this once, in an executable (not in a shared library) if you want fast code.
+
+int main(int argc, char *argv[])
+{
+    /* required: setup the Julia context */
+    jl_init();
+
+    /* run Julia commands */
+    jl_eval_string("print(sqrt(2.0))");
+
+    /* strongly recommended: notify Julia that the
+         program is about to terminate. this allows
+         Julia time to cleanup pending write requests
+         and run all finalizers
+    */
+    jl_atexit_hook(0);
+    return 0;
+}

hello_gcc_cmake/run.sh

@@ -0,0 +1,4 @@
+# Get Julia installation paths
+cmake -S . -B ./build -DCMAKE_BUILD_TYPE=Release
+cmake --build ./build --config Release -j `nproc`
+./build/hello