support gcc < 4

uwsgiconfig.py

@@ -63,16 +63,37 @@ GCC = os.environ.get('CC', sysconfig.get_config_var('CC'))
 if not GCC:
 	GCC = 'gcc'
 
+
+def spcall(cmd):
+	p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE)
+
+	if p.wait() == 0:
+		return p.stdout.read().rstrip().decode()
+	else:
+		return None
+
+def spcall2(cmd):
+	p = subprocess.Popen(cmd, shell=True, stderr=subprocess.PIPE)
+
+	if p.wait() == 0:
+		return p.stderr.read().rstrip().decode()
+	else:
+		return None
+
+gcc_version = str(spcall2("%s -v" % GCC)).split('\n')[-1].split()[2]
+
+gcc_major = int(gcc_version.split('.')[0])
+
+
 gcc_list = ['utils', 'pyutils', 'protocol', 'socket', 'logging', 'wsgi_handlers', 'wsgi_headers', 'uwsgi_handlers', 'plugins', 'uwsgi']
 
-# large file support
-try:
-	cflags = ['-O2', '-fno-strict-aliasing', '-Wall', '-Werror', '-Wextra', '-Wno-unused-parameter', '-Wno-missing-field-initializers', '-D_LARGEFILE_SOURCE', '-D_FILE_OFFSET_BITS=64'] + os.environ.get("CFLAGS", "").split()
-except:
-	print("You need python headers to build uWSGI.")
-	sys.exit(1)
+cflags = ['-O2', '-fno-strict-aliasing', '-Wall', '-Werror', '-D_LARGEFILE_SOURCE', '-D_FILE_OFFSET_BITS=64'] + os.environ.get("CFLAGS", "").split()
+
+if gcc_major >= 4:
+	cflags = cflags + [ '-Wextra', '-Wno-unused-parameter', '-Wno-missing-field-initializers' ]
 
 cflags = cflags + ['-I' + sysconfig.get_python_inc(), '-I' + sysconfig.get_python_inc(plat_specific=True) ]
+
 ldflags = os.environ.get("LDFLAGS", "").split()
 libs = ['-lpthread', '-rdynamic'] + sysconfig.get_config_var('LIBS').split() + sysconfig.get_config_var('SYSLIBS').split()
 if not sysconfig.get_config_var('Py_ENABLE_SHARED'):
@@ -90,13 +111,6 @@ def depends_on(what, dep):
 			print("%s needs %s support." % (what, d))
 			sys.exit(1)
 
-def spcall(cmd):
-	p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE)
-
-	if p.wait() == 0:
-		return p.stdout.read().rstrip().decode()
-	else:
-		return None
 
 def add_o(x):
 	if x == 'uwsgi':