Add C hello library with P/Invoke from Baz

2 files changed, 20 insertions, 0 deletions

diff --git a/chello/CMakeLists.txt b/chello/CMakeLists.txt
new file mode 100644
index 0000000..f7a276f
--- /dev/null
+++ b/chello/CMakeLists.txt
@@ -0,0 +1,15 @@
+find_program(CMAKE_C_COMPILER NAMES gcc cc)
+if(NOT CMAKE_C_COMPILER)
+    message(FATAL_ERROR "C compiler not found!")
+endif()
+
+set(OUTPUT_FILE ${CMAKE_BINARY_DIR}/libhello_c.so)
+
+add_custom_command(
+    OUTPUT ${OUTPUT_FILE}
+    COMMAND ${CMAKE_C_COMPILER} -shared -fPIC -o ${OUTPUT_FILE} ${CMAKE_CURRENT_SOURCE_DIR}/hello.c
+    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/hello.c
+    COMMENT "Compiling hello_c shared library..."
+)
+
+add_custom_target(hello_c ALL DEPENDS ${OUTPUT_FILE})
diff --git a/chello/hello.c b/chello/hello.c
new file mode 100644
index 0000000..b99e83d
--- /dev/null
+++ b/chello/hello.c
@@ -0,0 +1,5 @@
+#include <stdio.h>
+
+void hello_c(void) {
+    printf("hello from c\n");
+}