[#1798] Add musl support

Author: Myriade-Medieval

doc/release-notes/iceoryx2-unreleased.md

@@ -23,6 +23,7 @@
 * [#1707](https://github.com/eclipse-iceoryx/iceoryx2/issues/1707) Expose `CustomHeaderMarker` and `CustomPayloadMarker` in C++ bindings
 * [#1722](https://github.com/eclipse-iceoryx/iceoryx2/issues/1722) Remove allocations in tunnel hot path
 * [#1773](https://github.com/eclipse-iceoryx/iceoryx2/issues/1773) Make ports identifiable by name
+* [#1798](https://github.com/eclipse-iceoryx/iceoryx2/issues/1798) Add musl support
 
 ### Bugfixes
 

iceoryx2-bb/posix/src/socket_ancillary.rs

@@ -251,19 +251,18 @@ impl UdsMsgHeader {
 
 impl Default for SocketAncillary {
     fn default() -> Self {
+        let mut message = posix::msghdr::new_zeroed();
+        message.msg_name = core::ptr::null_mut::<posix::void>();
+        message.msg_iov = core::ptr::null_mut();
+        message.msg_iovlen = IOVEC_BUFFER_CAPACITY as _;
+        message.msg_control = core::ptr::null_mut::<posix::void>();
+        message.msg_controllen = buffer_capacity() as _;
+
         let mut new_self = Self {
             message_buffer: [0u8; BUFFER_CAPACITY],
             iovec_buffer: [0u8; IOVEC_BUFFER_CAPACITY],
             iovec: unsafe { core::mem::zeroed() },
-            message: posix::msghdr {
-                msg_name: core::ptr::null_mut::<posix::void>(),
-                msg_namelen: 0,
-                msg_iov: core::ptr::null_mut(),
-                msg_iovlen: IOVEC_BUFFER_CAPACITY as _,
-                msg_control: core::ptr::null_mut::<posix::void>(),
-                msg_controllen: buffer_capacity() as _,
-                msg_flags: 0,
-            },
+            message,
             file_descriptors: vec![],
             credentials: None,
             is_prepared_for_send: false,

iceoryx2-pal/posix/src/common/cpu_set_t.rs

@@ -18,7 +18,10 @@ use crate::posix::{CPU_SETSIZE, MemZeroedStruct};
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[repr(C)]
 pub struct cpu_set_t {
+    #[cfg(not(target_env = "musl"))]
     pub __bits: [u8; CPU_SETSIZE / 8],
+    #[cfg(target_env = "musl")]
+    pub __bits: [u8; CPU_SETSIZE],
 }
 impl MemZeroedStruct for cpu_set_t {}
 
@@ -46,7 +49,10 @@ impl cpu_set_t {
 
     pub(crate) fn new_allow_all() -> Self {
         Self {
+            #[cfg(not(target_env = "musl"))]
             __bits: [0xff; CPU_SETSIZE / 8],
+            #[cfg(target_env = "musl")]
+            __bits: [0xff; CPU_SETSIZE],
         }
     }
 }

iceoryx2-pal/posix/src/linux/pthread.rs

@@ -15,8 +15,14 @@
 
 use crate::posix::*;
 
+#[allow(unused_variables)]
 pub unsafe fn pthread_rwlockattr_setkind_np(attr: *mut pthread_rwlockattr_t, pref: int) -> int {
-    unsafe { libc::pthread_rwlockattr_setkind_np(attr, pref) }
+    #[cfg(target_env = "musl")]
+    todo!(); // TODO this function is not used; shall we remove it
+    #[cfg(not(target_env = "musl"))]
+    unsafe {
+        libc::pthread_rwlockattr_setkind_np(attr, pref)
+    }
 }
 
 pub unsafe fn pthread_barrier_wait(barrier: *mut pthread_barrier_t) -> int {
@@ -81,11 +87,15 @@ pub unsafe fn pthread_attr_setstacksize(attr: *mut pthread_attr_t, stacksize: si
     unsafe { libc::pthread_attr_setstacksize(attr, stacksize) }
 }
 
+#[allow(unused_variables)]
 pub unsafe fn pthread_attr_setaffinity_np(
     attr: *mut pthread_attr_t,
     cpusetsize: size_t,
     cpuset: *const cpu_set_t,
 ) -> int {
+    #[cfg(target_env = "musl")]
+    return 0;
+    #[cfg(not(target_env = "musl"))]
     unsafe {
         let cpuset = core::mem::transmute::<cpu_set_t, native_cpu_set_t>(*cpuset);
 

iceoryx2-pal/posix/src/linux/support.rs

@@ -14,7 +14,10 @@ pub const POSIX_SUPPORT_ACL: bool = true;
 pub const POSIX_SUPPORT_NAMED_SEMAPHORE: bool = true;
 pub const POSIX_SUPPORT_PERSISTENT_SHARED_MEMORY: bool = true;
 pub const POSIX_SUPPORT_UNIX_DATAGRAM_SOCKETS_ANCILLARY_DATA: bool = true;
+#[cfg(not(target_env = "musl"))]
 pub const POSIX_SUPPORT_CPU_AFFINITY: bool = true;
+#[cfg(target_env = "musl")]
+pub const POSIX_SUPPORT_CPU_AFFINITY: bool = false;
 pub const POSIX_SUPPORT_USERS_AND_GROUPS: bool = true;
 pub const POSIX_SUPPORT_PERMISSIONS: bool = true;
 pub const POSIX_SUPPORT_FILE_LOCK: bool = true;