Compile c files to separate directories. Add compressed library to example test project.

resources/testproject/hello_world.c3

@@ -2,6 +2,7 @@ module hello_world;
 import std;
 import bar;
 import clib;
+import clib2;
 
 fn int test_doubler(int x) @if(env::WIN32) => x * x;
 extern fn int test_doubler(int) @if(!env::WIN32);
@@ -14,5 +15,6 @@ fn int main()
     printf("Hello double: %d\n", test_doubler(11));
 	if ($feature(ABCD)) io::printn("ABCD");
 	clib::hello_from_c();
+	clib2::hello_from_c_zip();
     return 0;
 }

resources/testproject/lib/clib.c3l/manifest.json

@@ -1,6 +1,6 @@
 { 
   "provides" : "clib",
-  "c-sources" : ["hello.c"],
+  "c-sources" : ["hello2.c"],
   "targets" : {
     "macos-x64" : {
     },

resources/testproject/project.json

@@ -12,7 +12,7 @@
     "./**"
   ],
   "dependency-search-paths": [ "./lib" ],
-  "dependencies": ["clib"],
+  "dependencies": ["clib", "clib2"],
 
   "features": ["ABCD"],
 

src/compiler/compiler.c

@@ -253,12 +253,13 @@ static void free_arenas(void)
 	if (debug_stats) print_arena_status();
 }
 
-static int compile_cfiles(const char *compiler, const char **files, const char *flags, const char **out_files)
+static int compile_cfiles(const char *compiler, const char **files, const char *flags, const char **out_files,
+                          const char *output_subdir)
 {
 	int total = 0;
 	FOREACH(const char *, file, files)
 	{
-		out_files[total++] = cc_compiler(compiler, file, flags);
+		out_files[total++] = cc_compiler(compiler, file, flags, output_subdir);
 	}
 	return total;
 }
@@ -468,14 +469,15 @@ void compiler_compile(void)
 
 	if (cfiles)
 	{
-		int compiled = compile_cfiles(active_target.cc, active_target.csources, active_target.cflags, &obj_files[output_file_count]);
+		int compiled = compile_cfiles(active_target.cc, active_target.csources, active_target.cflags, &obj_files[output_file_count], "tmp_c_compile");
 		assert(cfiles == compiled);
 		(void)compiled;
 	}
 	const char **obj_file_next = &obj_files[output_file_count + cfiles];
 	FOREACH(LibraryTarget *, lib, active_target.ccompling_libraries)
 	{
-		obj_file_next += compile_cfiles(lib->cc ? lib->cc : active_target.cc, lib->csources, lib->cflags, obj_file_next);
+		obj_file_next += compile_cfiles(lib->cc ? lib->cc : active_target.cc, lib->csources,
+		                                lib->cflags, obj_file_next, lib->parent->provides);
 	}
 
 	Task **tasks = NULL;

src/compiler/compiler_internal.h

@@ -3504,7 +3504,7 @@ bool static_lib_linker(const char *output_file, const char **files, unsigned fil
 bool dynamic_lib_linker(const char *output_file, const char **files, unsigned file_count);
 bool linker(const char *output_file, const char **files, unsigned file_count);
 void platform_linker(const char *output_file, const char **files, unsigned file_count);
-const char *cc_compiler(const char *cc, const char *file, const char *flags);
+const char *cc_compiler(const char *cc, const char *file, const char *flags, const char *output_subdir);
 const char *arch_to_linker_arch(ArchType arch);
 
 #define CAT(a,b) CAT2(a,b) // force expand

src/compiler/linker.c

@@ -761,11 +761,12 @@ void platform_linker(const char *output_file, const char **files, unsigned file_
 	printf("Program linked to executable '%s'.\n", output_file);
 }
 
-const char *cc_compiler(const char *cc, const char *file, const char *flags)
+const char *cc_compiler(const char *cc, const char *file, const char *flags, const char *output_subdir)
 {
 	const char *dir = active_target.object_file_dir;
 	if (!dir) dir = active_target.build_dir;
-
+	if (output_subdir) dir = file_append_path(dir, output_subdir);
+	dir_make(dir);
 	bool is_cl_exe = str_eq(cc, "cl.exe");
 	char *filename = NULL;
 	bool split_worked = file_namesplit(file, &filename, NULL);