$ cat ehtest.cc 
//#include <stdio.h>

int main() {
  try {
    throw 1;
  }
  catch (...) {
    printf(" in catch\n");
    return 1;
  }
  printf(" back in main\n");
  return 10;
}

$ llvmg++ -O2 ehtest.cc -c
ehtest.cc: In function `int main()':
ehtest.cc:8: error: `printf' undeclared (first use this function)
ehtest.cc:8: error: (Each undeclared identifier is reported only once for each
function it appears in.)
 <var_decl 0x401b84d0 _ZTIi
    type <record_type 0x401b4150 __fundamental_type_info_pseudo readonly type_5 DI
        size <integer_cst 0x40021618 constant 64>
        unit size <integer_cst 0x4002199c constant 8>
        align 32 symtab 0 alias set -1
        fields <field_decl 0x401b3ee0 type <record_type 0x401b3c40
__type_info_pseudo>
            DI file <internal> line 0 size <integer_cst 0x40021618 64> unit size
<integer_cst 0x4002199c 8>
            align 32 offset_align 32
            offset <integer_cst 0x40021a64 constant 0>
            bit offset <integer_cst 0x40021b04 constant 0> context <record_type
0x401b3f50 __fundamental_type_info_pseudo> arguments <integer_cst 0x40021a64 0>>
        n_parents 0 use_template=0 interface-unknown>
    readonly public static common external DI file ehtest.cc line 5 size
<integer_cst 0x40021618 64> unit size <integer_cst 0x4002199c 8>
    align 32
    chain <function_decl 0x401b8310 __llvm_cxxeh_allocate_exception>>
ehtest.cc:5: internal compiler error: in llvm_expand_lvalue_expr, at
llvm-expand.c:4258
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://llvm.cs.uiuc.edu> for instructions.