cgcc

   1 #!/usr/bin/perl -w
   2 # -----------------------------------------------------------------------------
   3
   4 my $cc = $ENV{'REAL_CC'} || 'cc';
   5 my $check = $ENV{'CHECK'} || 'sparse';
   6
   7 my $m32 = 0;
   8 my $m64 = 0;
   9 my $has_specs = 0;
  10 my $do_check = 0;
  11 my $do_compile = 1;
  12 my $verbose = 0;
  13
  14 foreach (@ARGV) {
  15     # Look for a .c file.  We don't want to run the checker on .o or .so files
  16     # in the link run.  (This simplistic check knows nothing about options
  17     # with arguments, but it seems to do the job.)
  18     $do_check = 1 if /^[^-].*\.c$/;
  19
  20     # Ditto for stdin.
  21     $do_check = 1 if $_ eq '-';
  22
  23     $m32 = 1 if /^-m32$/;
  24     $m64 = 1 if /^-m64$/;
  25
  26     if (/^-specs=(.*)$/) {
  27         $check .= &add_specs ($1);
  28         $has_specs = 1;
  29         next;
  30     }
  31
  32     if ($_ eq '-no-compile') {
  33         $do_compile = 0;
  34         next;
  35     }
  36
  37     # If someone adds "-E", don't pre-process twice.
  38     $do_compile = 0 if $_ eq '-E';
  39
  40     $verbose = 1 if $_ eq '-v';
  41
  42     my $this_arg = ' ' . &quote_arg ($_);
  43     $cc .= $this_arg unless &check_only_option ($_);
  44     $check .= $this_arg unless &cc_only_option ($_);
  45 }
  46
  47 if ($do_check) {
  48     if (!$has_specs) {
  49         $check .= &add_specs ('host_arch_specs');
  50         $check .= &add_specs ('host_os_specs');
  51     }
  52     print "$check\n" if $verbose;
  53     if ($do_compile) {
  54         system ($check);
  55     } else {
  56         exec ($check);
  57     }
  58 }
  59
  60 if ($do_compile) {
  61     print "$cc\n" if $verbose;
  62     exec ($cc);
  63 }
  64
  65 exit 0;
  66
  67 # -----------------------------------------------------------------------------
  68 # Check if an option is for "check" only.
  69
  70 sub check_only_option {
  71     my ($arg) = @_;
  72     return 1 if $arg =~ /^-W(no-?)?(default-bitfield-sign|one-bit-signed-bitfield|cast-truncate|bitwise|typesign|context|undef|ptr-subtraction-blows|cast-to-as|decl|transparent-union|address-space|enum-mismatch|do-while|old-initializer|non-pointer-null|paren-string|return-void)$/;
  73     return 1 if $arg =~ /^-v(no-?)?(entry|dead)$/;
  74     return 0;
  75 }
  76
  77 # -----------------------------------------------------------------------------
  78 # Check if an option is for "cc" only.
  79
  80 sub cc_only_option {
  81     my ($arg) = @_;
  82     # -Wall turns on all Sparse warnings, including experimental and noisy
  83     # ones.  Don't include it just because a project wants to pass -Wall to cc.
  84     # If you really want cgcc to run sparse with -Wall, use
  85     # CHECK="sparse -Wall".
  86     return 1 if $arg =~ /^-Wall$/;
  87     return 0;
  88 }
  89
  90 # -----------------------------------------------------------------------------
  91 # Simple arg-quoting function.  Just adds backslashes when needed.
  92
  93 sub quote_arg {
  94     my ($arg) = @_;
  95     return "''" if $arg eq '';
  96     return join ('',
  97                  map {
  98                      m|^[-a-zA-Z0-9._/,=]+$| ? $_ : "\\" . $_;
  99                  } (split (//, $arg)));
 100 }
 101
 102 # -----------------------------------------------------------------------------
 103
 104 sub integer_types {
 105     my ($char,@dummy) = @_;
 106
 107     my %pow2m1 =
 108         (8 => '127',
 109          16 => '32767',
 110          32 => '2147483647',
 111          64 => '9223372036854775807',
 112          );
 113     my @types = (['SCHAR',''], ['SHRT',''], ['INT',''], ['LONG','L'], ['LONG_LONG','LL']);
 114
 115     my $result = " -D__CHAR_BIT__=$char";
 116     while (@types) {
 117         my $bits = shift @_;
 118         my ($name,$suffix) = @{ shift @types };
 119         die "$0: weird number of bits." unless exists $pow2m1{$bits};
 120         $result .= " -D__${name}_MAX__=" . $pow2m1{$bits} . $suffix;
 121     }
 122     return $result;
 123 }
 124
 125 # -----------------------------------------------------------------------------
 126
 127 sub float_types {
 128     my ($has_inf,$has_qnan,$dec_dig,@bitsizes) = @_;
 129     my $result = " -D__FLT_RADIX__=2";
 130     $result .= " -D__FINITE_MATH_ONLY__=" . ($has_inf || $has_qnan ? '0' : '1');
 131     $result .= " -D__DECIMAL_DIG__=$dec_dig";
 132
 133     my %constants =
 134         (24 =>
 135          {
 136              'MIN' => '1.17549435e-38',
 137              'MAX' => '3.40282347e+38',
 138              'EPSILON' => '1.19209290e-7',
 139              'DENORM_MIN' => '1.40129846e-45',
 140          },
 141          53 =>
 142          {
 143              'MIN' => '2.2250738585072014e-308',
 144              'MAX' => '1.7976931348623157e+308',
 145              'EPSILON' => '2.2204460492503131e-16',
 146              'DENORM_MIN' => '4.9406564584124654e-324',
 147          },
 148          64 =>
 149          {
 150              'MIN' => '3.36210314311209350626e-4932',
 151              'MAX' => '1.18973149535723176502e+4932',
 152              'EPSILON' => '1.08420217248550443401e-19',
 153              'DENORM_MIN' => '3.64519953188247460253e-4951',
 154          },
 155          113 =>
 156          {
 157              'MIN' => '3.36210314311209350626267781732175260e-4932',
 158              'MAX' => '1.18973149535723176508575932662800702e+4932',
 159              'EPSILON' => '1.92592994438723585305597794258492732e-34',
 160              'DENORM_MIN' => '6.47517511943802511092443895822764655e-4966',
 161          },
 162          );
 163
 164     my @types = (['FLT','F'], ['DBL',''], ['LDBL','L']);
 165     while (@types) {
 166         my ($mant_bits,$exp_bits) = @{ shift @bitsizes };
 167         my ($name,$suffix) = @{ shift @types };
 168
 169         my $h = $constants{$mant_bits};
 170         die "$0: weird number of mantissa bits." unless $h;
 171
 172         my $mant_dig = int (($mant_bits - 1) * log (2) / log (10));
 173         my $max_exp = 1 << ($exp_bits - 1);
 174         my $min_exp = 3 - $max_exp;
 175         my $max_10_exp = int ($max_exp * log (2) / log (10));
 176         my $min_10_exp = -int (-$min_exp * log (2) / log (10));
 177
 178         $result .= " -D__${name}_MANT_DIG__=$mant_bits";
 179         $result .= " -D__${name}_DIG__=$mant_dig";
 180         $result .= " -D__${name}_MIN_EXP__='($min_exp)'";
 181         $result .= " -D__${name}_MAX_EXP__=$max_exp";
 182         $result .= " -D__${name}_MIN_10_EXP__='($min_10_exp)'";
 183         $result .= " -D__${name}_MAX_10_EXP__=$max_10_exp";
 184         $result .= " -D__${name}_HAS_INFINITY__=" . ($has_inf ? '1' : '0');
 185         $result .= " -D__${name}_HAS_QUIET_NAN__=" . ($has_qnan ? '1' : '0');;
 186
 187         foreach my $inf (sort keys %$h) {
 188             $result .= " -D__${name}_${inf}__=" . $h->{$inf} . $suffix;
 189         }
 190     }
 191     return $result;
 192 }
 193
 194 # -----------------------------------------------------------------------------
 195
 196 sub define_size_t {
 197     my ($text) = @_;
 198     # We have to undef in order to override check's internal definition.
 199     return ' -U__SIZE_TYPE__ ' . &quote_arg ("-D__SIZE_TYPE__=$text");
 200 }
 201
 202 # -----------------------------------------------------------------------------
 203
 204 sub add_specs {
 205     my ($spec) = @_;
 206     if ($spec eq 'sunos') {
 207         return &add_specs ('unix') .
 208             ' -D__sun__=1 -D__sun=1 -Dsun=1' .
 209             ' -D__svr4__=1 -DSVR4=1' .
 210             ' -D__STDC__=0' .
 211             ' -D_REENTRANT' .
 212             ' -D_SOLARIS_THREADS' .
 213             ' -DNULL="((void *)0)"';
 214     } elsif ($spec eq 'linux') {
 215         return &add_specs ('unix') .
 216             ' -D__linux__=1 -D__linux=1 -Dlinux=linux';
 217     } elsif ($spec eq 'unix') {
 218         return ' -Dunix=1 -D__unix=1 -D__unix__=1';
 219     } elsif ( $spec =~ /^cygwin/) {
 220         return &add_specs ('unix') .
 221             ' -D__CYGWIN__=1 -D__CYGWIN32__=1' .
 222             " -D'_cdecl=__attribute__((__cdecl__))'" .
 223             " -D'__cdecl=__attribute__((__cdecl__))'" .
 224             " -D'_stdcall=__attribute__((__stdcall__))'" .
 225             " -D'__stdcall=__attribute__((__stdcall__))'" .
 226             " -D'_fastcall=__attribute__((__fastcall__))'" .
 227             " -D'__fastcall=__attribute__((__fastcall__))'" .
 228             " -D'__declspec(x)=__attribute__((x))'";
 229     } elsif ($spec eq 'i86') {
 230         return (' -Di386=1 -D__i386=1 -D__i386__=1' .
 231                 &integer_types (8, 16, 32, $m64 ? 64 : 32, 64) .
 232                 &float_types (1, 1, 21, [24,8], [53,11], [64,15]) .
 233                 &define_size_t ($m64 ? "long unsigned int" : "unsigned int"));
 234     } elsif ($spec eq 'sparc') {
 235         return (' -Dsparc=1 -D__sparc=1 -D__sparc__=1' .
 236                 &integer_types (8, 16, 32, $m64 ? 64 : 32, 64) .
 237                 &float_types (1, 1, 33, [24,8], [53,11], [113,15]) .
 238                 &define_size_t ($m64 ? "long unsigned int" : "unsigned int"));
 239     } elsif ($spec eq 'x86_64') {
 240         return (' -Dx86_64=1 -D__x86_64=1 -D__x86_64__=1' .
 241                 &integer_types (8, 16, 32, $m32 ? 32 : 64, 64) .
 242                 &float_types (1, 1, 33, [24,8], [53,11], [113,15]) .
 243                 &define_size_t ($m32 ? "unsigned int" : "long unsigned int"));
 244     } elsif ($spec eq 'ppc') {
 245         return (' -D__powerpc__=1 -D_BIG_ENDIAN -D_STRING_ARCH_unaligned=1' .
 246                 &integer_types (8, 16, 32, $m64 ? 64 : 32, 64) .
 247                 &float_types (1, 1, 21, [24,8], [53,11], [113,15]) .
 248                 &define_size_t ($m64 ? "long unsigned int" : "unsigned int"));
 249     } elsif ($spec eq 'host_os_specs') {
 250         my $os = `uname -s`;
 251         chomp $os;
 252         return &add_specs (lc $os);
 253     } elsif ($spec eq 'host_arch_specs') {
 254         my $arch = `uname -m`;
 255         chomp $arch;
 256         if ($arch =~ /^(i.?86|athlon)$/i) {
 257             return &add_specs ('i86');
 258         } elsif ($arch =~ /^(sun4u)$/i) {
 259             return &add_specs ('sparc');
 260         } elsif ($arch =~ /^(x86_64)$/i) {
 261             return &add_specs ('x86_64');
 262         } elsif ($arch =~ /^(ppc)$/i) {
 263             return &add_specs ('ppc');
 264         }
 265     } else {
 266         die "$0: invalid specs: $spec\n";
 267     }
 268 }
 269
 270 # -----------------------------------------------------------------------------