From d7130b3eee3e59f2e5475bbac5695cee54310c20 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Thu, 18 Apr 2024 17:30:08 -0400
Subject: config: Check for statx()

---
 config/header.mk       |  4 +++-
 config/statx-syscall.c | 13 +++++++++++++
 config/statx.c         | 11 +++++++++++
 src/stat.c             |  4 ++--
 src/stat.h             |  8 ++------
 5 files changed, 31 insertions(+), 9 deletions(-)
 create mode 100644 config/statx-syscall.c
 create mode 100644 config/statx.c

diff --git a/config/header.mk b/config/header.mk
index 20cb7ae..ec53dfa 100644
--- a/config/header.mk
+++ b/config/header.mk
@@ -17,7 +17,9 @@ HEADERS := \
     ${GEN}/getprogname.h \
     ${GEN}/getprogname-gnu.h \
     ${GEN}/posix-spawn-addfchdir.h \
-    ${GEN}/posix-spawn-addfchdir-np.h
+    ${GEN}/posix-spawn-addfchdir-np.h \
+    ${GEN}/statx.h \
+    ${GEN}/statx-syscall.h
 
 ${GEN}/config.h: ${HEADERS}
 	${MSG} "[ GEN] ${TGT}"
diff --git a/config/statx-syscall.c b/config/statx-syscall.c
new file mode 100644
index 0000000..87ec869
--- /dev/null
+++ b/config/statx-syscall.c
@@ -0,0 +1,13 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <fcntl.h>
+#include <linux/stat.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+int main(void) {
+	struct statx sb;
+	syscall(SYS_statx, AT_FDCWD, ".", 0, STATX_BASIC_STATS, &sb);
+	return 0;
+}
diff --git a/config/statx.c b/config/statx.c
new file mode 100644
index 0000000..65f1674
--- /dev/null
+++ b/config/statx.c
@@ -0,0 +1,11 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <fcntl.h>
+#include <sys/stat.h>
+
+int main(void) {
+	struct statx sb;
+	statx(AT_FDCWD, ".", 0, STATX_BASIC_STATS, &sb);
+	return 0;
+}
diff --git a/src/stat.c b/src/stat.c
index eca5bab..e525f24 100644
--- a/src/stat.c
+++ b/src/stat.c
@@ -13,7 +13,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
-#if BFS_USE_STATX && !BFS_HAS_LIBC_STATX
+#if BFS_USE_STATX && !BFS_HAS_STATX
 #  include <linux/stat.h>
 #  include <sys/syscall.h>
 #  include <unistd.h>
@@ -137,7 +137,7 @@ static int bfs_stat_impl(int at_fd, const char *at_path, int at_flags, struct bf
  * Wrapper for the statx() system call, which had no glibc wrapper prior to 2.28.
  */
 static int bfs_statx(int at_fd, const char *at_path, int at_flags, unsigned int mask, struct statx *buf) {
-#if BFS_HAS_LIBC_STATX
+#if BFS_HAS_STATX
 	int ret = statx(at_fd, at_path, at_flags, mask, buf);
 #else
 	int ret = syscall(SYS_statx, at_fd, at_path, at_flags, mask, buf);
diff --git a/src/stat.h b/src/stat.h
index 1fdd263..8d7144d 100644
--- a/src/stat.h
+++ b/src/stat.h
@@ -17,16 +17,12 @@
 #include <sys/types.h>
 #include <time.h>
 
-#if defined(STATX_BASIC_STATS) && (!__ANDROID__ || __ANDROID_API__ >= 30)
-#  define BFS_HAS_LIBC_STATX true
-#elif __linux__
+#if !BFS_HAS_STATX && BFS_HAS_STATX_SYSCALL
 #  include <linux/stat.h>
 #endif
 
 #ifndef BFS_USE_STATX
-#  ifdef STATX_BASIC_STATS
-#    define BFS_USE_STATX true
-#  endif
+#  define BFS_USE_STATX (BFS_HAS_STATX || BFS_HAS_STATX_SYSCALL)
 #endif
 
 #if BFS_USE_SYS_PARAM_H
-- 
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