diff --git a/plugins/airbrake/uwsgiplugin.py b/plugins/airbrake/uwsgiplugin.py
index 10db6fc190..43b475c59d 100644
--- a/plugins/airbrake/uwsgiplugin.py
+++ b/plugins/airbrake/uwsgiplugin.py
@@ -2,8 +2,11 @@
 
 NAME='airbrake'
 
-CFLAGS = [spcall('xml2-config --cflags')]
+CFLAGS = [spcall('pkg-config --cflags libxml-2.0')]
 LDFLAGS = []
-LIBS = ['-lcurl', spcall('xml2-config --libs')]
+LIBS = [
+    '-lcurl',
+    spcall('pkg-config --libs libxml-2.0')
+]
 GCC_LIST = ['airbrake_plugin']
 
diff --git a/plugins/jvm/uwsgiplugin.py b/plugins/jvm/uwsgiplugin.py
index 23f7da8ff7..657c96357c 100644
--- a/plugins/jvm/uwsgiplugin.py
+++ b/plugins/jvm/uwsgiplugin.py
@@ -48,13 +48,18 @@
             break
 
 try:
-    JVM_INCPATH = ['-I"' + os.environ['UWSGICONFIG_JVM_INCPATH'] + '"']
-except:
+    JVM_INCPATH = ['-I' + os.environ['UWSGICONFIG_JVM_INCPATH']]
+except KeyError:
     pass
 
 try:
-    JVM_LIBPATH = ['-L"' + os.environ['UWSGICONFIG_JVM_LIBPATH'] + '"']
-except:
+    JVM_INCPATH = [os.environ['UWSGICONFIG_JVM_INCLUDES']]
+except KeyError:
+    pass
+
+try:
+    JVM_LIBPATH = ['-L' + os.environ['UWSGICONFIG_JVM_LIBPATH']]
+except KeyError:
     pass
 
 if not JVM_INCPATH or not JVM_LIBPATH:
diff --git a/plugins/php/session.c b/plugins/php/session.c
index cce0698559..1e19f8bedd 100644
--- a/plugins/php/session.c
+++ b/plugins/php/session.c
@@ -14,7 +14,7 @@ PS_READ_FUNC(uwsgi) {
 	uint64_t valsize = 0;
 	char *value = uwsgi_cache_magic_get(key->val, key->len , &valsize, NULL, cache);
 	if (!value) {
-		*val = STR_EMPTY_ALLOC();
+		*val = ZSTR_EMPTY_ALLOC();
 		return SUCCESS;
 	}
 	*val = zend_string_init(value, valsize, 0);
diff --git a/plugins/php/uwsgiplugin.py b/plugins/php/uwsgiplugin.py
index 492926023d..9fc09188a7 100644
--- a/plugins/php/uwsgiplugin.py
+++ b/plugins/php/uwsgiplugin.py
@@ -24,9 +24,9 @@
 # PHP8 and above does not add the version to the library
 # name
 if int(php_version) < 8:
-    LIBS = [os.popen(PHPPATH + ' --libs').read().rstrip(), '-lphp' + php_version]
+    LIBS = ['-lphp' + php_version]
 else:
-    LIBS = [os.popen(PHPPATH + ' --libs').read().rstrip(), '-lphp']
+    LIBS = ['-lphp']
 
 phplibdir = os.environ.get('UWSGICONFIG_PHPLIBDIR')
 if phplibdir:
diff --git a/plugins/pty/pty.c b/plugins/pty/pty.c
index aa19563d74..68617f31c4 100644
--- a/plugins/pty/pty.c
+++ b/plugins/pty/pty.c
@@ -259,7 +259,7 @@ static void uwsgi_pty_init() {
 
 }
 
-static void uwsgi_pty_winch() {
+static void uwsgi_pty_winch(int sig) {
 	// 2 uwsgi packets
 	char uwsgi_pkt[8];
 #ifdef TIOCGWINSZ
@@ -309,7 +309,7 @@ static int uwsgi_pty_client() {
 	if (upty.uremote) {
 		signal(SIGWINCH, uwsgi_pty_winch);
 		// send current terminal size
-		uwsgi_pty_winch();
+		uwsgi_pty_winch(SIGWINCH);
 	}
 
 	upty.queue = event_queue_init();
diff --git a/plugins/tuntap/tuntap.c b/plugins/tuntap/tuntap.c
index a05db3814b..067a550563 100644
--- a/plugins/tuntap/tuntap.c
+++ b/plugins/tuntap/tuntap.c
@@ -409,7 +409,7 @@ void uwsgi_tuntap_router_loop(int id, void *arg) {
 	}
 }
 
-static void uwsgi_tuntap_router() {
+static void uwsgi_tuntap_router(int (*start)(void *), char **argv) {
 
 	if (!utt.routers) return;
 
diff --git a/plugins/webdav/uwsgiplugin.py b/plugins/webdav/uwsgiplugin.py
index b5395604f7..70648045fb 100644
--- a/plugins/webdav/uwsgiplugin.py
+++ b/plugins/webdav/uwsgiplugin.py
@@ -3,8 +3,8 @@
 NAME = 'webdav'
 
 CFLAGS = ['-Wno-deprecated-declarations']
-CFLAGS += os.popen('xml2-config --cflags').read().rstrip().split()
+CFLAGS += os.popen('pkg-config --cflags libxml-2.0').read().rstrip().split()
 LDFLAGS = []
-LIBS = os.popen('xml2-config --libs').read().rstrip().split()
+LIBS = os.popen('pkg-config --libs libxml-2.0').read().rstrip().split()
 
 GCC_LIST = ['webdav']
diff --git a/uwsgiconfig.py b/uwsgiconfig.py
index d702c996bf..9c77900d0d 100644
--- a/uwsgiconfig.py
+++ b/uwsgiconfig.py
@@ -1315,10 +1315,10 @@ def get_gcll(self):
 
         if self.get('xml'):
             if self.get('xml') == 'auto':
-                xmlconf = spcall('xml2-config --libs')
+                xmlconf = spcall('pkg-config --libs libxml-2.0')
                 if xmlconf and uwsgi_os != 'Darwin':
                     self.libs.append(xmlconf)
-                    xmlconf = spcall("xml2-config --cflags")
+                    xmlconf = spcall("pkg-config --cflags libxml-2.0")
                     self.cflags.append(xmlconf)
                     self.cflags.append("-DUWSGI_XML -DUWSGI_XML_LIBXML2")
                     self.gcc_list.append('core/xmlconf')
@@ -1329,13 +1329,13 @@ def get_gcll(self):
                     self.gcc_list.append('core/xmlconf')
                     report['xml'] = 'expat'
             elif self.get('xml') == 'libxml2':
-                xmlconf = spcall('xml2-config --libs')
+                xmlconf = spcall('pkg-config --libs libxml-2.0')
                 if xmlconf is None:
                     print("*** libxml2 headers unavailable. uWSGI build is interrupted. You have to install libxml2 development package or use libexpat or disable XML")
                     sys.exit(1)
                 else:
                     self.libs.append(xmlconf)
-                    xmlconf = spcall("xml2-config --cflags")
+                    xmlconf = spcall("pkg-config --cflags libxml-2.0")
                     if xmlconf is None:
                         print("*** libxml2 headers unavailable. uWSGI build is interrupted. You have to install libxml2 development package or use libexpat or disable XML")
                         sys.exit(1)