12 files changed, 10 insertions, 28 deletions

diff --git a/Makefile b/Makefile
index 70c141b..6709299 100644
--- a/Makefile
+++ b/Makefile
@@ -26,10 +26,12 @@ $(BUILD_DIR):
 
 # TODO: provide release build?
 $(BUILD_ROOT_DIR)/$(TARGET): $(OBJECTS)
-	$(CC) -Wall -MMD -g -O0 --std=c23 -o $@ $^
+	# TODO: use --std=c23 instead of --std=gnu23
+	$(CC) -Wall -MMD -g -O0 --std=gnu23 -o $@ $^
 
 # TODO: provide release build?
 $(BUILD_DIR)/%.o: src/%.c
-	$(CC) -c $(CFLAGS) -Wall -MMD -g -O0 --std=c23 -o $@ $<
+	# TODO: use --std=c23 instead of --std=gnu23
+	$(CC) -c $(CFLAGS) -Wall -MMD -g -O0 --std=gnu23 -o $@ $<
 
 -include $(BUILD_DIR)/*.d
diff --git a/src/ast.h b/src/ast.h
index 8d40575..04cc1ec 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -1,7 +1,7 @@
 #ifndef DUCC_AST_H
 #define DUCC_AST_H
 
-#include "std.h"
+#include <stddef.h>
 
 typedef enum {
     StorageClass_unspecified,
diff --git a/src/cli.c b/src/cli.c
index de30033..5448d3f 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -60,8 +60,8 @@ CliArgs* parse_cli_args(int argc, char** argv) {
         } else if (strcmp(argv[i], "--version") == 0) {
             print_version();
             exit(0);
-        } else if (strcmp(argv[i], "--std=c23") == 0) {
-            // ignore --std=c23
+        } else if (strcmp(argv[i], "--std=gnu23") == 0) {
+            // ignore --std=gnu23
         } else {
             fatal_error("unknown option: %s", argv[i]);
         }
diff --git a/src/cli.h b/src/cli.h
index 51263e2..f52964c 100644
--- a/src/cli.h
+++ b/src/cli.h
@@ -2,7 +2,6 @@
 #define DUCC_CLI_H
 
 #include "common.h"
-#include "std.h"
 
 typedef struct {
     const char* input_filename;
diff --git a/src/common.h b/src/common.h
index aea11d0..94f75b1 100644
--- a/src/common.h
+++ b/src/common.h
@@ -1,7 +1,7 @@
 #ifndef DUCC_COMMON_H
 #define DUCC_COMMON_H
 
-#include "std.h"
+#include <stddef.h>
 
 _Noreturn void fatal_error(const char* msg, ...);
 
diff --git a/src/fs.c b/src/fs.c
index 67d808e..c702fa4 100644
--- a/src/fs.c
+++ b/src/fs.c
@@ -1,7 +1,6 @@
 #include "fs.h"
 #include <stdlib.h>
 #include <string.h>
-#include "std.h"
 
 // 'ext' must include '.'.
 char* replace_extension(const char* file_name, const char* ext) {
diff --git a/src/io.h b/src/io.h
index 604b8f6..67bf055 100644
--- a/src/io.h
+++ b/src/io.h
@@ -2,7 +2,6 @@
 #define DUCC_IO_H
 
 #include "json.h"
-#include "std.h"
 
 typedef struct {
     const char* filename;
diff --git a/src/json.h b/src/json.h
index 40d5cde..9322901 100644
--- a/src/json.h
+++ b/src/json.h
@@ -1,8 +1,6 @@
 #ifndef DUCC_JSON_H
 #define DUCC_JSON_H
 
-#include "std.h"
-
 struct JsonBuilder;
 typedef struct JsonBuilder JsonBuilder;
 
diff --git a/src/main.c b/src/main.c
index a72b4f0..57b542c 100644
--- a/src/main.c
+++ b/src/main.c
@@ -8,7 +8,6 @@
 #include "io.h"
 #include "parse.h"
 #include "preprocess.h"
-#include "std.h"
 #include "tokenize.h"
 
 int main(int argc, char** argv) {
diff --git a/src/std.h b/src/std.h
deleted file mode 100644
index bfa5f0a..0000000
--- a/src/std.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef DUCC_STD_H
-#define DUCC_STD_H
-
-#include <stddef.h>
-
-// TODO: <stdlib.h>
-int mkstemps(char*, int);
-
-#endif
diff --git a/src/sys.c b/src/sys.c
index 8d89524..ba946a1 100644
--- a/src/sys.c
+++ b/src/sys.c
@@ -2,13 +2,7 @@
 #include <libgen.h>
 #include <linux/limits.h>
 #include <stdlib.h>
-#include "std.h"
-
-// TODO: #inclue some header.
-#ifndef __ducc__
-typedef long ssize_t;
-#endif
-ssize_t readlink(const char*, char*, size_t);
+#include <unistd.h>
 
 static char* get_self_path() {
     char* buf = calloc(PATH_MAX, sizeof(char));
diff --git a/src/token.h b/src/token.h
index bbd8066..ced3de3 100644
--- a/src/token.h
+++ b/src/token.h
@@ -1,6 +1,7 @@
 #ifndef DUCC_TOKEN_H
 #define DUCC_TOKEN_H
 
+#include <stddef.h>
 #include "io.h"
 #include "json.h"