Add GCC version detection.

Add cconfig.h file for different version of GCC, which is automatically
detected and generated by scons script.

2 files changed, 194 insertions, 5 deletions

diff --git a/tools/building.py b/tools/building.py
index 1a49d3c3a0..22350b28b7 100644
--- a/tools/building.py
+++ b/tools/building.py
@@ -74,7 +74,6 @@ PatchedPreProcessor = SCons.cpp.PreProcessor
 PatchedPreProcessor.start_handling_includes = start_handling_includes
 PatchedPreProcessor.stop_handling_includes = stop_handling_includes
 
-
 class Win32Spawn:
     def spawn(self, sh, escape, cmd, args, env):
         # deal with the cmd build-in commands which cannot be used in
@@ -141,10 +140,6 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
         env['LIBLINKSUFFIX']   = '.lib'
         env['LIBDIRPREFIX'] = '--userlibpath '
 
-    if rtconfig.PLATFORM == 'gcc':
-        if str(env['LINKFLAGS']).find('nano.specs'):
-            env.AppendUnique(CPPDEFINES = ['_REENT_SMALL'])
-
     # patch for win32 spawn
     if env['PLATFORM'] == 'win32':
         win32_spawn = Win32Spawn()
@@ -174,6 +169,31 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
     PreProcessor.process_contents(contents)
     BuildOptions = PreProcessor.cpp_namespace
 
+    if rtconfig.PLATFORM == 'gcc':
+        contents = ''
+        if not os.path.isfile('cconfig.h'):
+            import gcc
+            gcc.GenerateGCCConfig(rtconfig)
+
+        # try again
+        if os.path.isfile('cconfig.h'):
+            f = file('cconfig.h', 'r')
+            if f:
+                contents = f.read()
+                f.close();
+
+                prep = PatchedPreProcessor()
+                prep.process_contents(contents)
+                options = prep.cpp_namespace
+
+                BuildOptions.update(options)
+
+                # add HAVE_CCONFIG_H definition
+                env.AppendUnique(CPPDEFINES = ['HAVE_CCONFIG_H'])
+
+        if str(env['LINKFLAGS']).find('nano.specs') != -1:
+            env.AppendUnique(CPPDEFINES = ['_REENT_SMALL'])
+
     # add copy option
     AddOption('--copy',
                       dest='copy',
@@ -673,6 +693,10 @@ def EndBuilding(target, program = None):
     import rtconfig
 
     Env.AddPostAction(target, rtconfig.POST_ACTION)
+    # Add addition clean files
+    Clean(target, 'cconfig.h')
+    Clean(target, 'rtua.py')
+    Clean(target, 'rtua.pyc')
 
     if GetOption('target') == 'mdk':
         from keil import MDKProject
diff --git a/tools/gcc.py b/tools/gcc.py
new file mode 100644
index 0000000000..bfa0ca4173
--- /dev/null
+++ b/tools/gcc.py
@@ -0,0 +1,165 @@
+import os
+import re
+
+def GetGCCRoot(rtconfig):
+    exec_path = rtconfig.EXEC_PATH
+    prefix = rtconfig.PREFIX
+
+    if prefix.endswith('-'):
+        prefix = prefix[:-1]
+
+    root_path = os.path.join(exec_path, '..', prefix)
+
+    return root_path
+
+def CheckHeader(rtconfig, filename):
+    root = GetGCCRoot(rtconfig)
+
+    fn = os.path.join(root, 'include', filename)
+    if os.path.isfile(fn):
+        return True
+
+    return False
+
+def GetNewLibVersion(rtconfig):
+    version = 'unknown'
+    root = GetGCCRoot(rtconfig)
+
+    if CheckHeader(rtconfig, '_newlib_version.h'): # get version from _newlib_version.h file
+        f = file(os.path.join(root, 'include', '_newlib_version.h'))
+        if f:
+            for line in f:
+                if line.find('_NEWLIB_VERSION') != -1 and line.find('"') != -1:
+                    version = re.search(r'\"([^"]+)\"', line).groups()[0]
+    elif CheckHeader(rtconfig, 'newlib.h'): # get version from newlib.h
+        f = file(os.path.join(root, 'include', 'newlib.h'))
+        if f:
+            for line in f:
+                if line.find('_NEWLIB_VERSION') != -1 and line.find('"') != -1:
+                    version = re.search(r'\"([^"]+)\"', line).groups()[0]
+
+    return version
+
+def GCCResult(rtconfig, str):
+    import subprocess
+
+    result = ''
+
+    def checkAndGetResult(pattern, string):
+        if re.search(pattern, string):
+            return re.search(pattern, string).group(0)
+        return None
+
+    gcc_cmd = os.path.join(rtconfig.EXEC_PATH, rtconfig.CC)
+
+    # use temp file to get more information 
+    f = file('__tmp.c', 'w')
+    if f:
+        f.write(str)
+        f.close()
+
+        # '-fdirectives-only', 
+        child = subprocess.Popen([gcc_cmd, '-E', '-P', '__tmp.c'], stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
+        stdout, stderr = child.communicate()
+
+        print(stdout)
+        if stderr != '':
+            print(stderr)
+
+        have_fdset = 0
+        have_sigaction = 0
+        have_sigevent = 0
+        have_siginfo = 0
+        have_sigval = 0
+        version = None
+        stdc = '1989'
+        posix_thread = 0
+
+        for line in stdout.split('\n'):
+            if re.search('fd_set', line):
+                have_fdset = 1
+
+            # check for sigal
+            if re.search('struct[ \t]+sigaction', line):
+                have_sigaction = 1
+            if re.search('struct[ \t]+sigevent', line):
+                have_sigevent = 1
+            if re.search('siginfo_t', line):
+                have_siginfo = 1
+            if re.search('union[ \t]+sigval', line):
+                have_sigval = 1
+
+            if re.search('char\* version', line):
+                version = re.search(r'\"([^"]+)\"', line).groups()[0]
+
+            if re.findall('iso_c_visible = [\d]+', line):
+                stdc = re.findall('[\d]+', line)[0]
+
+            if re.findall('pthread_create', line):
+                posix_thread = 1
+    
+        if have_fdset:
+            result += '#define HAVE_FDSET 1\n'
+
+        if have_sigaction:
+            result += '#define HAVE_SIGACTION 1\n'
+        if have_sigevent:
+            result += '#define HAVE_SIGEVENT 1\n'
+        if have_siginfo:
+            result += '#define HAVE_SIGINFO 1\n'
+        if have_sigval:
+            result += '#define HAVE_SIGVAL 1\n'
+
+        if version:
+            result += '#define GCC_VERSION "%s"\n' % version
+
+        result += '#define STDC "%s"\n' % stdc
+
+        if posix_thread:
+            result += '#define LIBC_POSIX_THREADS 1\n'
+
+        os.remove('__tmp.c')
+
+    return result
+
+def GenerateGCCConfig(rtconfig):
+    str = ''
+    cc_header = ''
+    cc_header += '#ifndef CCONFIG_H__\n'
+    cc_header += '#define CCONFIG_H__\n'
+    cc_header += '/* Automatically generated file; DO NOT EDIT. */\n'
+    cc_header += '/* compiler configure file for RT-Thread in GCC*/\n\n'
+
+    if CheckHeader(rtconfig, 'newlib.h'):
+        str += '#include <newlib.h>\n'
+        cc_header += '#define HAVE_NEWLIB_H 1\n'
+        cc_header += '#define LIBC_VERSION "newlib %s"\n\n' % GetNewLibVersion(rtconfig)
+
+    if CheckHeader(rtconfig, 'sys/signal.h'):
+        str += '#include <sys/signal.h>\n'
+        cc_header += '#define HAVE_SYS_SIGNAL_H 1\n'
+    if CheckHeader(rtconfig, 'sys/select.h'):
+        str += '#include <sys/select.h>\n'
+        cc_header += '#define HAVE_SYS_SELECT_H 1\n'
+    if CheckHeader(rtconfig, 'pthread.h'):
+        str += "#include <pthread.h>\n"
+        cc_header += '#define HAVE_PTHREAD_H 1\n'
+
+    # if CheckHeader(rtconfig, 'sys/dirent.h'):
+    #    str += '#include <sys/dirent.h>\n'
+
+    # add some common features
+    str += 'const char* version = __VERSION__;\n'
+    str += 'const int iso_c_visible = __ISO_C_VISIBLE;\n'
+    str += '\n#ifdef HAVE_INITFINI_ARRAY\n'
+    str += 'const int init_fini_array = HAVE_INITFINI_ARRAY;\n'
+    str += '#endif\n'
+
+    cc_header += '\n'
+    cc_header += GCCResult(rtconfig, str)
+    cc_header += '\n#endif\n'
+
+    cc_file = file('cconfig.h', 'w')
+    if cc_file:
+        cc_file.write(cc_header)
+        cc_file.close()