[llvm] [llvm] Add managarm support (PR #138854)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-adt

Author: no92 (no92)

<details>
<summary>Changes</summary>

This PR is part of a series to upstream managarm support, as laid out in the [RFC](https://discourse.llvm.org/t/rfc-new-proposed-managarm-support-for-llvm-and-clang-87845/85884/1). This PR is a follow-up to #<!-- -->87845.

The intention here is to add the managarm target to the LLVM support lib, in preparation for a follow-up that would add the missing clang driver bits.

---
Full diff: https://github.com/llvm/llvm-project/pull/138854.diff


2 Files Affected:

- (modified) llvm/include/llvm/ADT/bit.h (+1-1) 
- (modified) llvm/lib/Support/Unix/Path.inc (+8-5) 


``````````diff
diff --git a/llvm/include/llvm/ADT/bit.h b/llvm/include/llvm/ADT/bit.h
index 915a7de50aaff..8544efb5c45d4 100644
--- a/llvm/include/llvm/ADT/bit.h
+++ b/llvm/include/llvm/ADT/bit.h
@@ -30,7 +30,7 @@
 
 #if defined(__linux__) || defined(__GNU__) || defined(__HAIKU__) ||            \
     defined(__Fuchsia__) || defined(__EMSCRIPTEN__) || defined(__NetBSD__) ||  \
-    defined(__OpenBSD__) || defined(__DragonFly__)
+    defined(__OpenBSD__) || defined(__DragonFly__) || defined(__managarm__)
 #include <endian.h>
 #elif defined(_AIX)
 #include <sys/machine.h>
diff --git a/llvm/lib/Support/Unix/Path.inc b/llvm/lib/Support/Unix/Path.inc
index 6004e007c0c7a..593f4111d06c1 100644
--- a/llvm/lib/Support/Unix/Path.inc
+++ b/llvm/lib/Support/Unix/Path.inc
@@ -69,7 +69,8 @@ extern char **environ;
 
 #include <sys/types.h>
 #if !defined(__APPLE__) && !defined(__OpenBSD__) && !defined(__FreeBSD__) &&   \
-    !defined(__linux__) && !defined(__FreeBSD_kernel__) && !defined(_AIX)
+    !defined(__linux__) && !defined(__FreeBSD_kernel__) && !defined(_AIX) &&   \
+    !defined(__managarm__)
 #include <sys/statvfs.h>
 #define STATVFS statvfs
 #define FSTATVFS fstatvfs
@@ -78,7 +79,7 @@ extern char **environ;
 #if defined(__OpenBSD__) || defined(__FreeBSD__)
 #include <sys/mount.h>
 #include <sys/param.h>
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__managarm__)
 #if defined(HAVE_LINUX_MAGIC_H)
 #include <linux/magic.h>
 #else
@@ -124,7 +125,8 @@ const file_t kInvalidFile = -1;
 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) ||      \
     defined(__FreeBSD_kernel__) || defined(__linux__) || defined(__CYGWIN__) || \
     defined(__DragonFly__) || defined(_AIX) || defined(__GNU__) ||              \
-    (defined(__sun__) && defined(__svr4__) || defined(__HAIKU__))
+    (defined(__sun__) && defined(__svr4__) || defined(__HAIKU__)) ||            \
+    defined(__managarm__)
 static int test_dir(char ret[PATH_MAX], const char *dir, const char *bin) {
   struct stat sb;
   char fullpath[PATH_MAX];
@@ -245,7 +247,8 @@ std::string getMainExecutable(const char *argv0, void *MainAddr) {
   // If we don't have procfs mounted, fall back to argv[0]
   if (getprogpath(exe_path, argv0) != NULL)
     return exe_path;
-#elif defined(__linux__) || defined(__CYGWIN__) || defined(__gnu_hurd__)
+#elif defined(__linux__) || defined(__CYGWIN__) || defined(__gnu_hurd__) ||    \
+    defined(__managarm__)
   char exe_path[PATH_MAX];
   const char *aPath = "/proc/self/exe";
   if (sys::fs::exists(aPath)) {
@@ -472,7 +475,7 @@ std::error_code remove(const Twine &path, bool IgnoreNonExisting) {
 }
 
 static bool is_local_impl(struct STATVFS &Vfs) {
-#if defined(__linux__) || defined(__GNU__)
+#if defined(__linux__) || defined(__GNU__) || defined(__managarm__)
 #ifndef NFS_SUPER_MAGIC
 #define NFS_SUPER_MAGIC 0x6969
 #endif

``````````

</details>


https://github.com/llvm/llvm-project/pull/138854