diff -Naur socat-1.7.4.0-orig/compat.h socat-1.7.4.0/compat.h

--- socat-1.7.4.0-orig/compat.h	2021-01-03 13:23:22.000000000 -0500

+++ socat-1.7.4.0/compat.h	2021-01-04 14:07:30.229747181 -0500

@@ -134,6 +134,8 @@

 #    define F_uint64_t "%u"

 #  elif HAVE_BASIC_UINT64_T==6

 #    define F_uint64_t "%lu"

+#  elif HAVE_BASIC_UINT64_T==8

+#    define F_uint64_t "%llu"

 #  else

 #    error "HAVE_BASIC_UINT64_T is out of range:" HAVE_BASIC_UINT64_T

 #  endif

@@ -147,7 +149,7 @@

 #  elif HAVE_BASIC_INT16_T==3

 #    define F_int16_t "%d"

 #  elif HAVE_BASIC_INT16_T==5

-#    define F_int16_t "%l"

+#    define F_int16_t "%ld"

 #  else

 #    error "HAVE_BASIC_INT16_T is out of range:" HAVE_BASIC_INT16_T

 #  endif

@@ -161,7 +163,7 @@

 #  elif HAVE_BASIC_INT32_T==3

 #    define F_int32_t "%d"

 #  elif HAVE_BASIC_INT32_T==5

-#    define F_int32_t "%l"

+#    define F_int32_t "%ld"

 #  else

 #    error "HAVE_BASIC_INT32_T is out of range:" HAVE_BASIC_INT32_T

 #  endif

@@ -175,7 +177,9 @@

 #  elif HAVE_BASIC_INT64_T==3

 #    define F_int64_t "%d"

 #  elif HAVE_BASIC_INT64_T==5

-#    define F_int64_t "%l"

+#    define F_int64_t "%ld"

+#  elif HAVE_BASIC_INT64_T==7

+#    define F_int64_t "%lld"

 #  else

 #    error "HAVE_BASIC_INT64_T is out of range:" HAVE_BASIC_INT64_T

 #  endif