diff -up src/sage/libs/ecl.pxd.orig src/sage/libs/ecl.pxd
--- src/sage/libs/ecl.pxd.orig	2020-05-20 16:33:41.000000000 -0600
+++ src/sage/libs/ecl.pxd	2020-07-07 09:05:47.078665548 -0600
@@ -39,7 +39,6 @@ cdef extern from "ecl/ecl.h":
         ECL_OPT_TRAP_SIGINT,
         ECL_OPT_TRAP_SIGILL,
         ECL_OPT_TRAP_SIGBUS,
-        ECL_OPT_TRAP_SIGCHLD,
         ECL_OPT_TRAP_SIGPIPE,
         ECL_OPT_TRAP_INTERRUPT_SIGNAL,
         ECL_OPT_SIGNAL_HANDLING_THREAD,
@@ -53,7 +52,6 @@ cdef extern from "ecl/ecl.h":
         ECL_OPT_LISP_STACK_SAFETY_AREA,
         ECL_OPT_C_STACK_SIZE,
         ECL_OPT_C_STACK_SAFETY_AREA,
-        ECL_OPT_SIGALTSTACK_SIZE,
         ECL_OPT_HEAP_SIZE,
         ECL_OPT_HEAP_SAFETY_AREA,
         ECL_OPT_THREAD_INTERRUPT_SIGNAL,
diff -up src/sage/libs/ecl.pyx.orig src/sage/libs/ecl.pyx
--- src/sage/libs/ecl.pyx.orig	2020-05-20 16:33:41.000000000 -0600
+++ src/sage/libs/ecl.pyx	2020-07-07 09:07:43.622621879 -0600
@@ -15,7 +15,7 @@ Library interface to Embeddable Common L
 #adapted to work with pure Python types.
 
 from libc.stdlib cimport abort
-from libc.signal cimport SIGINT, SIGBUS, SIGSEGV, SIGCHLD
+from libc.signal cimport SIGINT, SIGBUS, SIGSEGV
 from libc.signal cimport raise_ as signal_raise
 from posix.signal cimport sigaction, sigaction_t
 cimport cysignals.signals
@@ -139,7 +139,6 @@ def test_ecl_options():
         ECL_OPT_TRAP_SIGINT = 1
         ECL_OPT_TRAP_SIGILL = 1
         ECL_OPT_TRAP_SIGBUS = 1
-        ECL_OPT_TRAP_SIGCHLD = 0
         ECL_OPT_TRAP_SIGPIPE = 1
         ECL_OPT_TRAP_INTERRUPT_SIGNAL = 1
         ECL_OPT_SIGNAL_HANDLING_THREAD = 0
@@ -153,7 +152,6 @@ def test_ecl_options():
         ECL_OPT_LISP_STACK_SAFETY_AREA = ...
         ECL_OPT_C_STACK_SIZE = ...
         ECL_OPT_C_STACK_SAFETY_AREA = ...
-        ECL_OPT_SIGALTSTACK_SIZE = 1
         ECL_OPT_HEAP_SIZE = ...
         ECL_OPT_HEAP_SAFETY_AREA = ...
         ECL_OPT_THREAD_INTERRUPT_SIGNAL = ...
@@ -171,8 +169,6 @@ def test_ecl_options():
         ecl_get_option(ECL_OPT_TRAP_SIGILL)))
     print('ECL_OPT_TRAP_SIGBUS = {0}'.format(
         ecl_get_option(ECL_OPT_TRAP_SIGBUS)))
-    print('ECL_OPT_TRAP_SIGCHLD = {0}'.format(
-        ecl_get_option(ECL_OPT_TRAP_SIGCHLD)))
     print('ECL_OPT_TRAP_SIGPIPE = {0}'.format(
         ecl_get_option(ECL_OPT_TRAP_SIGPIPE)))
     print('ECL_OPT_TRAP_INTERRUPT_SIGNAL = {0}'.format(
@@ -199,8 +195,6 @@ def test_ecl_options():
         ecl_get_option(ECL_OPT_C_STACK_SIZE)))
     print('ECL_OPT_C_STACK_SAFETY_AREA = {0}'.format(
         ecl_get_option(ECL_OPT_C_STACK_SAFETY_AREA)))
-    print('ECL_OPT_SIGALTSTACK_SIZE = {0}'.format(
-        ecl_get_option(ECL_OPT_SIGALTSTACK_SIZE)))
     print('ECL_OPT_HEAP_SIZE = {0}'.format(
         ecl_get_option(ECL_OPT_HEAP_SIZE)))
     print('ECL_OPT_HEAP_SAFETY_AREA = {0}'.format(
@@ -243,9 +237,6 @@ def init_ecl():
     if ecl_has_booted:
         raise RuntimeError("ECL is already initialized")
 
-    # we need it to stop handling SIGCHLD
-    ecl_set_option(ECL_OPT_TRAP_SIGCHLD, 0);
-
     #we keep our own GMP memory functions. ECL should not claim them
     ecl_set_option(ECL_OPT_SET_GMP_MEMORY_FUNCTIONS,0);
 
@@ -266,12 +257,6 @@ def init_ecl():
     sigaction(SIGBUS, NULL, &ecl_sigbus_handler)
     sigaction(SIGSEGV, NULL, &ecl_sigsegv_handler)
 
-    #verify that no SIGCHLD handler was installed
-    cdef sigaction_t sig_test
-    sigaction(SIGCHLD, NULL, &sig_test)
-    assert sage_action[SIGCHLD].sa_handler == NULL  # Sage does not set SIGCHLD handler
-    assert sig_test.sa_handler == NULL              # And ECL bootup did not set one 
-
     #and put the Sage signal handlers back
     for i in range(1,32):
         sigaction(i, &sage_action[i], NULL)