Added target for userspace stdlib.

.gitignore

@@ -1,6 +1,9 @@
 # Log files
 *.log
 
+# Variant Folder for Stdlib
+.stdlib_variant
+
 # Staging Folder
 staging/
 

targets/_any/bastl/include/exception

@@ -3,7 +3,9 @@
 #define BAD_APPLE_OS_EXCEPTION_INCLUDED
 
 #include <cstdlib>
+#if defined(__baos_kernel_source__)
 #include "os/panic.hpp"
+#endif
 
 #if defined(__cpp_exceptions)
 #define __ba_throw throw
@@ -32,7 +34,13 @@ private:
 public:
     [[noreturn]] ExceptionAbortHelper& operator=(const std::exception& ex) noexcept
     {
+#if defined(__baos_kernel_source__)
         panicf("Uncaught exception with message \"%s\" at %s:%d.", ex.what(), mFile, mLine);
+#else
+        // TODO!!!
+        std::abort();
+        __builtin_unreachable();
+#endif
     }
 
     ExceptionAbortHelper& operator()(const char* file, int line) noexcept

targets/_any/bastl/include/type_traits

@@ -85,7 +85,7 @@ struct type_identity
 };
 
 template<typename T>
-using type_identity_t = type_identity<T>::type;
+using type_identity_t = typename type_identity<T>::type;
 
 template<typename T, T v>
 struct integral_constant

targets/_any/stdlib/SConscript

@@ -1,13 +1,37 @@
 
 Import('env')
 
-stdlib_sources = Split('''
+shared_sources = Split('''
     src/assert.cpp
     src/stdio.cpp
     src/stdlib.cpp
     src/string.cpp
 ''')
 
-env.Append(KERNEL_SOURCES = [env.File(f) for f in stdlib_sources])
+kernel_sources = shared_sources
+
+env.Append(KERNEL_SOURCES = [env.File(f) for f in kernel_sources])
+
+### Stdlib
+stdlib_env = env.Clone()
+stdlib_env['AS'] = 'x86_64-baos-elf-as'
+stdlib_env['CC'] = 'x86_64-baos-elf-gcc'
+stdlib_env['CXX'] = 'x86_64-baos-elf-g++'
+stdlib_env['LD'] = 'x86_64-baos-elf-g++'
+stdlib_env.Append(CXXFLAGS = ['-fno-exceptions', '-fno-rtti', '-std=c++20'])
+stdlib_env.Append(CPPPATH = ['#targets/_any/bastl/include', '#targets/_any/stdlib/include', '#targets/_any/kernel/include'])
+
+stdlib_sources = Split('''
+    src/crt0.s
+''')
+for src in shared_sources:
+    new_src = stdlib_env.File(f'#.stdlib_variant/{stdlib_env.File(src).name}').abspath
+    stdlib_env.Command(new_src, src, Copy("$TARGET", "$SOURCE"))
+    stdlib_sources.append(new_src)
+lib_stdlib = stdlib_env.StaticLibrary(
+    target = stdlib_env.File('#stdlib.a'),
+    source = stdlib_sources
+)
+stdlib_env.Default(lib_stdlib)
 
 Return('env')

targets/_any/stdlib/src/crt0.s

@@ -0,0 +1,30 @@
+
+.section .text
+
+.global _start
+.type _start, @function
+_start:
+    # set up end of stack-frame list
+    movq $0, %rbp
+    pushq %rbp
+    pushq %rbp
+    movq %rsp, %rbp
+
+    # preserve argc and argv
+    pushq %rsi
+    pushq %rdi
+
+    # init C library
+    call _init
+
+    # restore argc and argv
+    popq %rdi
+    popq %rsi
+
+    # call main
+    call main
+
+    # exit by calling exit
+    movl %eax, %edi # exit code (return value of main)
+    call exit
+.size _start, . - _start

targets/_any/stdlib/src/stdio.cpp

@@ -2,13 +2,14 @@
 #include <stdio.h>
 
 #include <algorithm>
+#include <string>
 #include <stdarg.h>
-#include "os/tty.hpp"
 #include "os/tools/printf_helper.hpp"
 #include "os/tools/ringbuffer.hpp"
 
 #if defined(__baos_kernel_source__)
 #include "os/serial.hpp"
+#include "os/tty.hpp"
 #else
 #include "os/syscall.hpp"
 #endif
@@ -103,10 +104,14 @@ class StdinFile : public __file
 public:
     bool underflow() noexcept override
     {
+#if defined(__baos_kernel_source__)
         for (char chr : tty::readLine()) {
             mBuffer.append(chr);
         }
         return true;
+#else
+        return false; // TODO!!!
+#endif
     }
 };
 StdinFile gStdin;