Using feenableexcept() does not really work on linux: it is broken and makes the signal handler be ignored.

src/CHANGELOG

@@ -11,6 +11,11 @@ ECL 9.10.2:
  - The package MP is needed also in single-threaded versions (for
    mp:with-lock, which is used in CLX).
 
+ - In Linux there is a problem with handlers for SIGFPE being totally ignored
+   by the system. The problem seems to be solved by refusing to use
+   feenableexcept() and restricting to C99 exception tests. That is bad because
+   we can not reliably and cheaply detect underflow exceptions.
+
 ECL 9.10.1:
 ===========
 

src/configure

@@ -12988,9 +12988,8 @@ done
 
 
 
-
 for ac_func in nanosleep alarm times select setenv putenv \
-                lstat mkstemp sigprocmask isatty feenableexcept tzset \
+                lstat mkstemp sigprocmask isatty tzset \
 		gettimeofday getrusage
 do
 as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
@@ -13109,6 +13108,7 @@ done
 
 
 
+
 
 for ac_func in expf logf sqrtf cosf sinf tanf sinhf coshf tanhf \
 		floorf ceilf fabsf frexpf ldexpf log1p log1pf log1pl \

src/configure.in

@@ -653,9 +653,11 @@ AC_CHECK_FUNCS( [floor getcwd gethostbyaddr gethostbyname getpagesize] \
 dnl !!! end autoscan
 
 AC_CHECK_FUNCS( [nanosleep alarm times select setenv putenv] \
-                [lstat mkstemp sigprocmask isatty feenableexcept tzset] \
+                [lstat mkstemp sigprocmask isatty tzset] \
 		[gettimeofday getrusage] )
 
+dnl AC_CHECK_FUNCS( [ feenableexcept ] )
+
 AC_CHECK_FUNCS( [expf logf sqrtf cosf sinf tanf sinhf coshf tanhf] \
 		[floorf ceilf fabsf frexpf ldexpf log1p log1pf log1pl] \
                 [copysign] )