diff --git a/NEWS b/NEWS
index 1ccffaae6c1..d1537408024 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,12 @@ PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 ?? ??? 2022, PHP 8.0.18
 
+- Intl:
+  . Fixed bug GH-8142 (Compilation error on cygwin). (David Carlier)
+
+- Pcntl:
+  . Fixed bug GH-8142 (Compilation error on cygwin). (David Carlier)
+
 - Standard:
   . Fixed bug GH-8048 (Force macOS to use statfs). (risner)
 
diff --git a/ext/intl/config.m4 b/ext/intl/config.m4
index b511f00451b..36221a9d7bf 100644
--- a/ext/intl/config.m4
+++ b/ext/intl/config.m4
@@ -85,6 +85,9 @@ if test "$PHP_INTL" != "no"; then
   PHP_REQUIRE_CXX()
   PHP_CXX_COMPILE_STDCXX(11, mandatory, PHP_INTL_STDCXX)
   PHP_INTL_CXX_FLAGS="$INTL_COMMON_FLAGS $PHP_INTL_STDCXX $ICU_CXXFLAGS"
+  case $host_alias in
+  *cygwin*) PHP_INTL_CXX_FLAGS="$PHP_INTL_CXX_FLAGS -D_POSIX_C_SOURCE=200809L"
+  esac
   if test "$ext_shared" = "no"; then
     PHP_ADD_SOURCES(PHP_EXT_DIR(intl), $PHP_INTL_CXX_SOURCES, $PHP_INTL_CXX_FLAGS)
   else
diff --git a/ext/pcntl/pcntl.c b/ext/pcntl/pcntl.c
index e59decb3a55..2b1f9f5f1f0 100644
--- a/ext/pcntl/pcntl.c
+++ b/ext/pcntl/pcntl.c
@@ -1160,7 +1160,7 @@ static void pcntl_siginfo_to_zval(int signo, siginfo_t *siginfo, zval *user_sigi
 			case SIGBUS:
 				add_assoc_double_ex(user_siginfo, "addr", sizeof("addr")-1, (zend_long)siginfo->si_addr);
 				break;
-#ifdef SIGPOLL
+#if defined(SIGPOLL) && !defined(__CYGWIN__)
 			case SIGPOLL:
 				add_assoc_long_ex(user_siginfo, "band", sizeof("band")-1, siginfo->si_band);
 # ifdef si_fd