meta: add msvc support

since bluelib is already cross-platform, this is mostly just adding
__declspec(dllexport) to the library functions.

asm/CMakeLists.txt

@@ -2,3 +2,5 @@ file(GLOB_RECURSE asm_sources *.c *.h include/ivy/asm/*.h)
 
 add_library(ivy-asm SHARED ${asm_sources})
 target_include_directories(ivy-asm PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include/)
+target_link_libraries(ivy-asm ivy-common)
+target_compile_definitions(ivy-asm PRIVATE IVY_EXPORT=1)

asm/include/ivy/asm/lex.h

@@ -0,0 +1,8 @@
+#ifndef IVY_ASM_LEX_H_
+#define IVY_ASM_LEX_H_
+
+#include <ivy/misc.h>
+
+IVY_API void placeholder12(void);
+
+#endif

asm/lex.c

@@ -0,0 +1,6 @@
+#include <ivy/asm/lex.h>
+
+IVY_API void placeholder12(void)
+{
+
+}