diff --git a/configure.ac b/configure.ac
index ded516b01f095..e830acfb25582 100644
--- a/configure.ac
+++ b/configure.ac
@@ -601,6 +601,9 @@ AX_FUNC_WHICH_GETHOSTBYNAME_R
 dnl Some systems (like OpenSolaris) do not have nanosleep in libc.
 PHP_CHECK_FUNC_LIB(nanosleep, rt)
 
+dnl Haiku does not have network api in libc.
+PHP_CHECK_FUNC_LIB(setsockopt, network)
+
 dnl Check for getaddrinfo, should be a better way, but... Also check for working
 dnl getaddrinfo.
 AC_CACHE_CHECK([for getaddrinfo], ac_cv_func_getaddrinfo,
diff --git a/ext/gd/libgd/gd_jpeg.c b/ext/gd/libgd/gd_jpeg.c
index 3f0241a8e0376..e7c3d752919b2 100644
--- a/ext/gd/libgd/gd_jpeg.c
+++ b/ext/gd/libgd/gd_jpeg.c
@@ -47,7 +47,7 @@ typedef struct _jmpbuf_wrapper
 	int ignore_warning;
 } jmpbuf_wrapper;
 
-static long php_jpeg_emit_message(j_common_ptr jpeg_info, int level)
+static void php_jpeg_emit_message(j_common_ptr jpeg_info, int level)
 {
 	char message[JMSG_LENGTH_MAX];
 	jmpbuf_wrapper *jmpbufw;
@@ -81,11 +81,9 @@ static long php_jpeg_emit_message(j_common_ptr jpeg_info, int level)
 			}
 		}
 	}
-	return 1;
 }
 
 
-
 /* Called by the IJG JPEG library upon encountering a fatal error */
 static void fatal_jpeg_error (j_common_ptr cinfo)
 {
@@ -356,8 +354,7 @@ gdImagePtr gdImageCreateFromJpegCtxEx (gdIOCtx * infile, int ignore_warning)
 
 	cinfo.err = jpeg_std_error (&jerr);
 	cinfo.client_data = &jmpbufw;
-
-	cinfo.err->emit_message = (void (*)(j_common_ptr,int)) php_jpeg_emit_message;
+	cinfo.err->emit_message = php_jpeg_emit_message;
 
 	if (setjmp (jmpbufw.jmpbuf) != 0) {
 		/* we're here courtesy of longjmp */
diff --git a/ext/opcache/jit/zend_jit_perf_dump.c b/ext/opcache/jit/zend_jit_perf_dump.c
index 663f9ae1e05cc..e61c49289535e 100644
--- a/ext/opcache/jit/zend_jit_perf_dump.c
+++ b/ext/opcache/jit/zend_jit_perf_dump.c
@@ -22,9 +22,10 @@
 #include <unistd.h>
 #include <time.h>
 #include <sys/mman.h>
-#include <sys/syscall.h>
 
-#if defined(__darwin__)
+#if defined(__linux__)
+#include <sys/syscall.h>
+#elif defined(__darwin__)
 # include <pthread.h>
 #elif defined(__FreeBSD__)
 # include <sys/thr.h>
diff --git a/ext/posix/posix.c b/ext/posix/posix.c
index 090f47a79536d..a697c0c4677eb 100644
--- a/ext/posix/posix.c
+++ b/ext/posix/posix.c
@@ -883,8 +883,14 @@ PHP_FUNCTION(posix_getgrgid)
 
 	grbuf = emalloc(grbuflen);
 
+try_again:
 	ret = getgrgid_r(gid, &_g, grbuf, grbuflen, &retgrptr);
 	if (ret || retgrptr == NULL) {
+		if (errno == ERANGE) {
+			grbuflen *= 2;
+			grbuf = erealloc(grbuf, grbuflen);
+			goto try_again;
+		}
 		POSIX_G(last_error) = ret;
 		efree(grbuf);
 		RETURN_FALSE;
@@ -952,7 +958,13 @@ PHP_FUNCTION(posix_getpwnam)
 	buf = emalloc(buflen);
 	pw = &pwbuf;
 
+try_again:
 	if (getpwnam_r(name, pw, buf, buflen, &pw) || pw == NULL) {
+		if (errno == ERANGE) {
+			buflen *= 2;
+			buf = erealloc(buf, buflen);
+			goto try_again;
+		}
 		efree(buf);
 		POSIX_G(last_error) = errno;
 		RETURN_FALSE;
@@ -1001,8 +1013,14 @@ PHP_FUNCTION(posix_getpwuid)
 	}
 	pwbuf = emalloc(pwbuflen);
 
+try_again:
 	ret = getpwuid_r(uid, &_pw, pwbuf, pwbuflen, &retpwptr);
 	if (ret || retpwptr == NULL) {
+		if (errno == ERANGE) {
+			pwbuflen *= 2;
+			pwbuf = erealloc(pwbuf, pwbuflen);
+			goto try_again;
+		}
 		POSIX_G(last_error) = ret;
 		efree(pwbuf);
 		RETURN_FALSE;
diff --git a/ext/standard/microtime.c b/ext/standard/microtime.c
index b33face760ff7..fe18e9b92aa9f 100644
--- a/ext/standard/microtime.c
+++ b/ext/standard/microtime.c
@@ -128,7 +128,7 @@ PHP_FUNCTION(getrusage)
 #ifdef PHP_WIN32 /* Windows only implements a limited amount of fields from the rusage struct */
 	PHP_RUSAGE_PARA(ru_majflt);
 	PHP_RUSAGE_PARA(ru_maxrss);
-#elif !defined(_OSD_POSIX)
+#elif !defined(_OSD_POSIX) && !defined(__HAIKU__)
 	PHP_RUSAGE_PARA(ru_oublock);
 	PHP_RUSAGE_PARA(ru_inblock);
 	PHP_RUSAGE_PARA(ru_msgsnd);
diff --git a/sapi/phpdbg/phpdbg.c b/sapi/phpdbg/phpdbg.c
index ea0653fd25e2b..f978c21ea348d 100644
--- a/sapi/phpdbg/phpdbg.c
+++ b/sapi/phpdbg/phpdbg.c
@@ -1683,6 +1683,9 @@ int main(int argc, char **argv) /* {{{ */
 			}
 
 #ifndef _WIN32
+# ifndef SIGIO
+#  define SIGIO SIGPOLL
+# endif
 			zend_sigaction(SIGIO, &sigio_struct, NULL);
 #endif