3 files changed, 21 insertions, 19 deletions
diff --git a/components/libc/Kconfig b/components/libc/Kconfig
index 8a790c298d..a89b252caa 100644
--- a/components/libc/Kconfig
+++ b/components/libc/Kconfig
@@ -16,26 +16,26 @@ endif
 
 if RT_USING_LIBC && RT_USING_DFS
     config RT_USING_POSIX
-        bool "Enable POSIX layer for poll/select, stdin etc"
+        bool "Enable POSIX layer for compatibility with UNIX APIs, poll/select etc"
         select RT_USING_DFS_DEVFS
         default y
 
     if RT_USING_POSIX
-    config RT_USING_POSIX_MMAP
-        bool "Enable mmap() API"
-        default n
+        config RT_USING_POSIX_MMAP
+            bool "Enable mmap() API"
+            default n
 
-    config RT_USING_POSIX_TERMIOS
-        bool "Enable termios APIs"
-        default n
+        config RT_USING_POSIX_TERMIOS
+            bool "Enable termios APIs"
+            default n
 
-    config RT_USING_POSIX_GETLINE
-        bool "Enable getline()/getdelim() APIs"
-        default n
+        config RT_USING_POSIX_GETLINE
+            bool "Enable getline()/getdelim() APIs"
+            default n
 
-    config RT_USING_POSIX_AIO
-        bool "Enable AIO"
-        default n
+        config RT_USING_POSIX_AIO
+            bool "Enable AIO"
+            default n
     endif
 
 endif
diff --git a/components/libc/compilers/common/SConscript b/components/libc/compilers/common/SConscript
index d9de1cf17f..039e53a0b3 100644
--- a/components/libc/compilers/common/SConscript
+++ b/components/libc/compilers/common/SConscript
@@ -23,9 +23,11 @@ else:
 
 if GetDepend('RT_USING_LIBC') or GetDepend('RT_LIBC_USING_TIME'):
     group = DefineGroup('libc', src, depend = [''], CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES)
-    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'))
+
+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/common/none-gcc/SConscript b/components/libc/compilers/common/none-gcc/SConscript
index 346e69b478..c5838f8949 100644
--- a/components/libc/compilers/common/none-gcc/SConscript
+++ b/components/libc/compilers/common/none-gcc/SConscript
@@ -8,6 +8,6 @@ CPPPATH = [cwd]
 group = []
 src += Glob('*.c')
 
-if rtconfig.PLATFORM != 'gcc':
+if rtconfig.PLATFORM != 'gcc' or rtconfig.ARCH == 'sim':
     group = DefineGroup('libc', src, depend = ['RT_USING_LIBC'], CPPPATH = CPPPATH)
 Return('group')