Hi,

I am trying to build the latest development source (gambit-v4_8_8-devel) on Mac OS X (darwin14.5.0). I am running into the following error while configuring the source:

In file included from _num.c:705:0:
_num.c: In function ‘long int ___H__20___num(___processor_state)’:
../include/gambit.h:2880:98: error: ‘__builtin_add_overflow’ was not declared in this scope
 #define ___FIXADDP(x,y)(___EXPECT_FALSE(__builtin_add_overflow((___WORD)(x),(___WORD)(y),&___temp))?___FAL:___temp)
                                                                                                  ^
../include/gambit.h:4296:30: note: in definition of macro ‘___SET_R3’
 #define ___SET_R3(val)___R3=(val);
                              ^
../include/gambit.h:2880:25: note: in expansion of macro ‘___EXPECT_FALSE’
 #define ___FIXADDP(x,y)(___EXPECT_FALSE(__builtin_add_overflow((___WORD)(x),(___WORD)(y),&___temp))?___FAL:___temp)
                         ^
_num.c:22107:14: note: in expansion of macro ‘___FIXADDP’
    ___SET_R3(___FIXADDP(___R1,___R2))
              ^
../include/gambit.h:2890:95: error: ‘__builtin_mul_overflow’ was not declared in this scope
 #define ___FIXMULP(x,y)(___EXPECT_FALSE(__builtin_mul_overflow((___WORD)(x),___INT(y),&___temp))?___FAL:___temp)
                                                                                               ^
../include/gambit.h:4296:30: note: in definition of macro ‘___SET_R3’
 #define ___SET_R3(val)___R3=(val);
                              ^
../include/gambit.h:2890:25: note: in expansion of macro ‘___EXPECT_FALSE’
 #define ___FIXMULP(x,y)(___EXPECT_FALSE(__builtin_mul_overflow((___WORD)(x),___INT(y),&___temp))?___FAL:___temp)
                         ^
_num.c:22698:14: note: in expansion of macro ‘___FIXMULP’
    ___SET_R3(___FIXMULP(___R1,___R2))
              ^
../include/gambit.h:2907:98: error: ‘__builtin_sub_overflow’ was not declared in this scope
 #define ___FIXSUBP(x,y)(___EXPECT_FALSE(__builtin_sub_overflow((___WORD)(x),(___WORD)(y),&___temp))?___FAL:___temp)
                                                                                                  ^
../include/gambit.h:4296:30: note: in definition of macro ‘___SET_R3’
 #define ___SET_R3(val)___R3=(val);
                              ^
../include/gambit.h:2907:25: note: in expansion of macro ‘___EXPECT_FALSE’
 #define ___FIXSUBP(x,y)(___EXPECT_FALSE(__builtin_sub_overflow((___WORD)(x),(___WORD)(y),&___temp))?___FAL:___temp)
                         ^
_num.c:23679:14: note: in expansion of macro ‘___FIXSUBP’
    ___SET_R3(___FIXSUBP(___R1,___R2))
              ^

The complete configure command is:

./configure --enable-single-host --enable-multiple-threaded-vms --bindir=${MY_HOME}/platform/gsc/bin --includedir=${MY_HOME}/platform/gsc/include --libdir=${MY_HOME}/platform/gsc/lib

If the `--enable-multiple-threaded-vms` option is removed, I get a different error:

gcc -Wno-unused -Wno-write-strings -O1 -fwrapv -fno-strict-aliasing -fno-trapping-math -fno-math-errno -fschedule-insns2 -fomit-frame-pointer -fPIC -fno-common -mieee-fp -mpc64    -I"../include"  -o "gsi"    _gsi.o _gsi_.o "../lib/libgambit.a"  libgambitgsi.a
Undefined symbols for architecture x86_64:
  "___builtin_add_overflow", referenced from:
      ____H__20___num in libgambit.a(_num.o)
      ____H__20___system in libgambit.a(_system.o)
  "___builtin_mul_overflow", referenced from:
      ____H__20___num in libgambit.a(_num.o)
  "___builtin_sub_overflow", referenced from:
      ____H__20___num in libgambit.a(_num.o)
ld: symbol(s) not found for architecture x86_64

What am I doing wrong?

Thanks,

--Vijay