Move c_src dirs back to toplevel

We just wanted c sourcefiles out of the top level, not c source
directories.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Makefile

@@ -30,7 +30,7 @@ CFLAGS+=-std=gnu11 -O2 -g -MMD -Wall -fPIC			\
 	-Wno-deprecated-declarations				\
 	-fno-strict-aliasing					\
 	-fno-delete-null-pointer-checks				\
-	-Ic_src -Ic_src/include					\
+	-I. -Ic_src -Iinclude -Iraid				\
 	-D_FILE_OFFSET_BITS=64					\
 	-D_GNU_SOURCE						\
 	-D_LGPL_SOURCE						\
@@ -171,13 +171,13 @@ OBJS:=$(SRCS:.c=.o)
 	@echo "    [CC]     $@"
 	$(Q)$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $<
 
-BCACHEFS_DEPS=c_src/libbcachefs.a
+BCACHEFS_DEPS=libbcachefs.a
 RUST_SRCS:=$(shell find src bch_bindgen/src -type f -iname '*.rs')
 
 bcachefs: $(BCACHEFS_DEPS) $(RUST_SRCS)
 	$(Q)$(CARGO_BUILD)
 
-c_src/libbcachefs.a: $(filter-out ./tests/%.o, $(OBJS))
+libbcachefs.a: $(filter-out ./tests/%.o, $(OBJS))
 	@echo "    [AR]     $@"
 	$(Q)ar -rc $@ $+
 

bch_bindgen/build.rs

@@ -19,8 +19,6 @@ fn main() {
         .expect("ENV Var 'CARGO_MANIFEST_DIR' Expected")
         .into();
 
-    let libbcachefs_inc_dir = std::path::Path::new("../c_src");
-
     let bindings = bindgen::builder()
         .header(
             top_dir
@@ -29,11 +27,9 @@ fn main() {
                 .display()
                 .to_string(),
         )
-        .clang_arg(format!(
-            "-I{}",
-            libbcachefs_inc_dir.join("include").display()
-        ))
-        .clang_arg(format!("-I{}", libbcachefs_inc_dir.display()))
+        .clang_arg("-I..")
+        .clang_arg("-I../c_src")
+        .clang_arg("-I../include")
         .clang_arg("-DZSTD_STATIC_LINKING_ONLY")
         .clang_arg("-DNO_BCACHEFS_FS")
         .clang_arg("-D_GNU_SOURCE")

build.rs

@@ -1,6 +1,6 @@
 fn main() {
-    println!("cargo:rustc-link-search=c_src");
-    println!("cargo:rerun-if-changed=c_src/libbcachefs.a");
+    println!("cargo:rustc-link-search=.");
+    println!("cargo:rerun-if-changed=libbcachefs.a");
     println!("cargo:rustc-link-lib=static:+whole-archive=bcachefs");
 
     println!("cargo:rustc-link-lib=urcu");