[libc][musl] support arm-linux-musleabi toolchain

目前基本功能已经可以在QEMU上跑起来，但是pthread和内核signal选中会报冲突。先合并一版本，后续解决这些问题。

6 files changed, 88 insertions, 43 deletions

diff --git a/components/libc/compilers/common/include/sys/select.h b/components/libc/compilers/common/include/sys/select.h
index 9004658be9..32ce39c287 100644
--- a/components/libc/compilers/common/include/sys/select.h
+++ b/components/libc/compilers/common/include/sys/select.h
@@ -12,7 +12,7 @@
 #ifndef __SYS_SELECT_H__
 #define __SYS_SELECT_H__
 
-#include <rtthread.h>
+#include <rtconfig.h>
 #include <sys/types.h>
 #include <sys/time.h>
 
diff --git a/components/libc/compilers/common/include/sys/signal.h b/components/libc/compilers/common/include/sys/signal.h
index dbd947acb9..b92276ecb1 100644
--- a/components/libc/compilers/common/include/sys/signal.h
+++ b/components/libc/compilers/common/include/sys/signal.h
@@ -14,12 +14,11 @@
 
 #ifdef __cplusplus
 extern "C" {
-#endif
+#endif /* __cplusplus */
 
 #include <stdint.h>
 #include <sys/types.h>
 
-
 /* sigev_notify values
    NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD.  */
 
@@ -54,7 +53,6 @@ struct siginfo
 {
     uint16_t si_signo;
     uint16_t si_code;
-
     union sigval si_value;
 };
 typedef struct siginfo siginfo_t;
@@ -216,17 +214,16 @@ int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact)
 #define SIGUSR2 31  /* user defined signal 2 */
 #define NSIG    32      /* signal 0 implied */
 
-#ifndef _SIGNAL_H_
+#if defined(RT_USING_NEWLIBC)
 /* Some applications take advantage of the fact that <sys/signal.h>
  * and <signal.h> are equivalent in glibc.  Allow for that here.  */
 #include <signal.h>
-#endif
-
-#endif
+#endif /* defined(RT_USING_NEWLIBC) */
+#endif /* __ARMCC_VERSION */
 
 #ifdef __cplusplus
 }
-#endif
+#endif /* __cplusplus */
 
-#endif
+#endif /* __SYS_SIGNAL_H__ */
 
diff --git a/components/libc/compilers/common/include/sys/time.h b/components/libc/compilers/common/include/sys/time.h
index 346320bff0..e3bf3ee4ef 100644
--- a/components/libc/compilers/common/include/sys/time.h
+++ b/components/libc/compilers/common/include/sys/time.h
@@ -22,7 +22,7 @@ typedef __time64_t time_t;
 
 #ifdef __cplusplus
 extern "C" {
-#endif
+#endif /* __cplusplus */
 
 #undef CLOCKS_PER_SEC
 #define CLOCKS_PER_SEC RT_TICK_PER_SECOND
@@ -79,22 +79,21 @@ int stime(const time_t *t);
 time_t timegm(struct tm * const t);
 int gettimeofday(struct timeval *tv, struct timezone *tz);
 int settimeofday(const struct timeval *tv, const struct timezone *tz);
-#if defined(__ARMCC_VERSION) || defined (__ICCARM__)
+
+#if defined(__ARMCC_VERSION) || defined (__ICCARM__) || defined(_WIN32)
 struct tm *gmtime_r(const time_t *timep, struct tm *r);
-struct tm* localtime_r(const time_t* t, struct tm* r);
 char* asctime_r(const struct tm *t, char *buf);
 char *ctime_r(const time_t * tim_p, char * result);
-#elif defined(_WIN32)
-struct tm* gmtime_r(const time_t* timep, struct tm* r);
-struct tm* gmtime(const time_t* t);
 struct tm* localtime_r(const time_t* t, struct tm* r);
+#endif /* defined(__ARMCC_VERSION) || defined (__ICCARM__) || defined(_WIN32) */
+
+#ifdef _WIN32
+struct tm* gmtime(const time_t* t);
 struct tm* localtime(const time_t* t);
 time_t mktime(struct tm* const t);
-char* asctime_r(const struct tm* t, char* buf);
-char* ctime_r(const time_t* tim_p, char* result);
 char* ctime(const time_t* tim_p);
 time_t time(time_t* t);
-#endif
+#endif /* _WIN32 */
 
 #ifdef RT_USING_POSIX_DELAY
 int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
@@ -112,20 +111,21 @@ int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
 
 #ifndef CLOCK_REALTIME
 #define CLOCK_REALTIME      1
-#endif
+#endif /* CLOCK_REALTIME */
 
 #define CLOCK_CPUTIME_ID    2
 
 #ifndef CLOCK_PROCESS_CPUTIME_ID
 #define CLOCK_PROCESS_CPUTIME_ID CLOCK_CPUTIME_ID
-#endif
+#endif /* CLOCK_PROCESS_CPUTIME_ID */
+
 #ifndef CLOCK_THREAD_CPUTIME_ID
 #define CLOCK_THREAD_CPUTIME_ID  CLOCK_CPUTIME_ID
-#endif
+#endif /* CLOCK_THREAD_CPUTIME_ID */
 
 #ifndef CLOCK_MONOTONIC
 #define CLOCK_MONOTONIC     4
-#endif
+#endif /* CLOCK_MONOTONIC */
 #endif /* defined(RT_USING_POSIX_CLOCK) || defined (RT_USING_POSIX_TIMER) */
 
 #ifdef RT_USING_POSIX_CLOCK
@@ -142,8 +142,7 @@ int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid);
 int timer_delete(timer_t timerid);
 int timer_getoverrun(timer_t timerid);
 int timer_gettime(timer_t timerid, struct itimerspec *its);
-int timer_settime(timer_t timerid, int flags, const struct itimerspec *value,
-                  struct itimerspec *ovalue);
+int timer_settime(timer_t timerid, int flags, const struct itimerspec *value, struct itimerspec *ovalue);
 #endif /* RT_USING_POSIX_TIMER */
 
 /* timezone */
@@ -153,6 +152,6 @@ int8_t tz_is_dst(void);
 
 #ifdef __cplusplus
 }
-#endif
+#endif /* __cplusplus */
 
 #endif /* _SYS_TIME_H_ */
diff --git a/components/libc/compilers/musl/SConscript b/components/libc/compilers/musl/SConscript
new file mode 100644
index 0000000000..9bc5696157
--- /dev/null
+++ b/components/libc/compilers/musl/SConscript
@@ -0,0 +1,30 @@
+import os
+from building import *
+from gcc import *
+Import('rtconfig')
+
+group = []
+
+libc_name, libc_version = GetGCCLibcNameVersion(rtconfig)
+
+if libc_name == 'musl':
+    print('Musl version: ' + libc_version)
+
+    cwd = GetCurrentDir()
+    src = Glob('*.c')
+
+    CPPPATH = [cwd]
+    CPPDEFINES = ['RT_USING_MUSLLIBC', 'RT_USING_LIBC']
+    LIBS = ['c', 'gcc']
+    LINKFLAGS = ' --specs=kernel.specs'
+    AddDepend(['RT_USING_MUSLLIBC', 'RT_USING_LIBC'])
+
+    group = group + DefineGroup('Compiler', src, depend = [''], CPPPATH = CPPPATH, LINKFLAGS = LINKFLAGS, CPPDEFINES = CPPDEFINES, LIBS = LIBS)
+
+    list = os.listdir(cwd)
+    for d in list:
+        path = os.path.join(cwd, d)
+        if os.path.isfile(os.path.join(path, 'SConscript')):
+            group = group + SConscript(os.path.join(d, 'SConscript'))
+
+Return('group')
diff --git a/components/libc/compilers/musl/syscalls.c b/components/libc/compilers/musl/syscalls.c
new file mode 100644
index 0000000000..6d412cc0a1
--- /dev/null
+++ b/components/libc/compilers/musl/syscalls.c
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-11-18     Meco Man     first version
+ */
+
+#include <rtthread.h>
+
+int *__errno_location(void)
+{
+    return _rt_errno();
+}
+int *___errno_location(void)
+{
+    return _rt_errno();
+}
diff --git a/components/libc/compilers/newlib/SConscript b/components/libc/compilers/newlib/SConscript
index dd8966d5bd..14d3f737f5 100644
--- a/components/libc/compilers/newlib/SConscript
+++ b/components/libc/compilers/newlib/SConscript
@@ -3,28 +3,27 @@ from building import *
 from gcc import *
 Import('rtconfig')
 
-src = []
-cwd = GetCurrentDir()
 group = []
-LIBS = []
-CPPPATH = [cwd]
 
-if rtconfig.PLATFORM in ['gcc']:
-    LIBS += ['c', 'm'] # link libc and libm
-    src += Glob('*.c')
+libc_name, libc_version = GetGCCLibcNameVersion(rtconfig)
 
-    #report newlib version
-    print('Newlib version:' + GetNewLibVersion(rtconfig))
+if libc_name == 'newlib':
+    print('Newlib version: ' + libc_version)
 
-    # identify this is Newlib, and only enable POSIX.1-1990
-    CPPDEFINES = ['RT_USING_NEWLIBC', 'RT_USING_LIBC', '_POSIX_C_SOURCE=1']
+    cwd = GetCurrentDir()
+    src = Glob('*.c')
+
+    CPPPATH = [cwd]
+    CPPDEFINES = ['RT_USING_NEWLIBC', 'RT_USING_LIBC', '_POSIX_C_SOURCE=1'] # identify this is Newlib, and only enable POSIX.1-1990
+    LIBS = ['c', 'm'] # link libc and libm
     AddDepend(['RT_USING_NEWLIBC', 'RT_USING_LIBC'])
-    group = DefineGroup('Compiler', src, depend = [''], CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES, LIBS = LIBS)
 
-list = os.listdir(cwd)
-for d in list:
-    path = os.path.join(cwd, d)
-    if os.path.isfile(os.path.join(path, 'SConscript')):
-        group = group + SConscript(os.path.join(d, 'SConscript'))
+    group = group + DefineGroup('Compiler', src, depend = [''], CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES, LIBS = LIBS)
+
+    list = os.listdir(cwd)
+    for d in list:
+        path = os.path.join(cwd, d)
+        if os.path.isfile(os.path.join(path, 'SConscript')):
+            group = group + SConscript(os.path.join(d, 'SConscript'))
 
 Return('group')