cgcc

   1 #!/usr/bin/perl -w
   2 # -----------------------------------------------------------------------------
   3
   4 use strict;
   5 use warnings;
   6
   7 my $cc = $ENV{'REAL_CC'} || 'cc';
   8 my $check = $ENV{'CHECK'} || 'sparse';
   9 my $ccom = $cc;
  10
  11 my $m32 = 0;
  12 my $m64 = 0;
  13 my $has_specs = 0;
  14 my $gendeps = 0;
  15 my $do_check = 0;
  16 my $do_compile = 1;
  17 my $gcc_base_dir;
  18 my $multiarch_dir;
  19 my $verbose = 0;
  20 my $nargs = 0;
  21
  22 while (@ARGV) {
  23     $_ = shift(@ARGV);
  24
  25     if ($nargs) {
  26         $nargs--;
  27         goto add_option;
  28     }
  29
  30     # Look for a .c file.  We don't want to run the checker on .o or .so files
  31     # in the link run.
  32     $do_check = 1 if /^[^-].*\.c$/;
  33
  34     # Ditto for stdin.
  35     $do_check = 1 if $_ eq '-';
  36
  37     if (/^-(o|MF|MT|MQ)$/) {
  38         # Need to be checked explicitly since otherwise
  39         # the argument would be processed as a
  40         # (non-existant) source file or as an option.
  41         die ("$0: missing argument for $_") if !@ARGV;
  42         $nargs = 1;
  43     }
  44
  45     # Ignore the extension if '-x c' is given.
  46     if ($_ eq '-x') {
  47         die ("$0: missing argument for $_") if !@ARGV;
  48         die ("$0: invalid argument for $_") if $ARGV[0] ne 'c';
  49         $do_check = 1;
  50         $nargs = 1;
  51     }
  52
  53     $m32 = 1 if /^-m32$/;
  54     $m64 = 1 if /^-m64$/;
  55     $gendeps = 1 if /^-(M|MM)$/;
  56
  57     if (/^-target=(.*)$/) {
  58         $check .= &add_specs ($1);
  59         $has_specs = 1;
  60         next;
  61     }
  62
  63     if ($_ eq '-no-compile') {
  64         $do_compile = 0;
  65         next;
  66     }
  67
  68     if (/^-gcc-base-dir$/) {
  69         $gcc_base_dir = shift @ARGV;
  70         die ("$0: missing argument for -gcc-base-dir option") if !$gcc_base_dir;
  71         next;
  72     }
  73
  74     if (/^-multiarch-dir$/) {
  75         $multiarch_dir = shift @ARGV;
  76         die ("$0: missing argument for -multiarch-dir option") if !$multiarch_dir;
  77         next;
  78     }
  79
  80     # If someone adds "-E", don't pre-process twice.
  81     $do_compile = 0 if $_ eq '-E';
  82
  83     $verbose = 1 if $_ eq '-v';
  84
  85 add_option:
  86     my $this_arg = ' ' . &quote_arg ($_);
  87     $cc .= $this_arg unless &check_only_option ($_);
  88     $check .= $this_arg;
  89 }
  90
  91 if ($gendeps) {
  92     $do_compile = 1;
  93     $do_check = 0;
  94 }
  95
  96 if ($do_check) {
  97     if (!$has_specs) {
  98         $check .= &add_specs ('host_arch_specs');
  99         $check .= &add_specs ('host_os_specs');
 100     }
 101
 102     $gcc_base_dir = qx($ccom -print-file-name=) if !$gcc_base_dir;
 103     chomp($gcc_base_dir);  # possibly remove '\n' from compiler
 104     $check .= " -gcc-base-dir " . $gcc_base_dir if $gcc_base_dir;
 105
 106     $multiarch_dir = qx($ccom -print-multiarch) if ! defined $multiarch_dir;
 107     chomp($multiarch_dir);  # possibly remove '\n' from compiler
 108     $check .= " -multiarch-dir " . $multiarch_dir if $multiarch_dir;
 109
 110     print "$check\n" if $verbose;
 111     if ($do_compile) {
 112         system ($check);
 113     } else {
 114         exec ($check);
 115     }
 116 }
 117
 118 if ($do_compile) {
 119     print "$cc\n" if $verbose;
 120     exec ($cc);
 121 }
 122
 123 exit 0;
 124
 125 # -----------------------------------------------------------------------------
 126 # Check if an option is for "check" only.
 127
 128 sub check_only_option {
 129     my ($arg) = @_;
 130     return 1 if $arg =~ /^-W(no-?)?(address-space|bitwise|cast-to-as|cast-truncate|constant-suffix|context|decl|default-bitfield-sign|designated-init|do-while|enum-mismatch|external-function-has-definition|init-cstring|memcpy-max-count|non-pointer-null|old-initializer|one-bit-signed-bitfield|override-init-all|paren-string|ptr-subtraction-blows|return-void|sizeof-bool|sparse-all|sparse-error|transparent-union|typesign|undef|unknown-attribute)$/;
 131     return 1 if $arg =~ /^-v(no-?)?(entry|dead)$/;
 132     return 1 if $arg =~ /^-f(dump-ir|memcpy-max-count|diagnostic-prefix)(=\S*)?$/;
 133     return 1 if $arg =~ /^-f(mem2reg|optim)(-enable|-disable|=last)?$/;
 134     return 1 if $arg =~ /^-msize-(long|llp64)$/;
 135     return 0;
 136 }
 137
 138 # -----------------------------------------------------------------------------
 139 # Simple arg-quoting function.  Just adds backslashes when needed.
 140
 141 sub quote_arg {
 142     my ($arg) = @_;
 143     return "''" if $arg eq '';
 144     return join ('',
 145                  map {
 146                      m|^[-a-zA-Z0-9._/,=]+$| ? $_ : "\\" . $_;
 147                  } (split (//, $arg)));
 148 }
 149
 150 # -----------------------------------------------------------------------------
 151
 152 sub float_types {
 153     my ($has_inf,$has_qnan,$dec_dig,@bitsizes) = @_;
 154     my $result = " -D__FLT_RADIX__=2";
 155     $result .= " -D__FINITE_MATH_ONLY__=" . ($has_inf || $has_qnan ? '0' : '1');
 156     $result .= " -D__DECIMAL_DIG__=$dec_dig";
 157
 158     my %constants =
 159         (24 =>
 160          {
 161              'MIN' => '1.17549435e-38',
 162              'MAX' => '3.40282347e+38',
 163              'EPSILON' => '1.19209290e-7',
 164              'DENORM_MIN' => '1.40129846e-45',
 165          },
 166          53 =>
 167          {
 168              'MIN' => '2.2250738585072014e-308',
 169              'MAX' => '1.7976931348623157e+308',
 170              'EPSILON' => '2.2204460492503131e-16',
 171              'DENORM_MIN' => '4.9406564584124654e-324',
 172          },
 173          64 =>
 174          {
 175              'MIN' => '3.36210314311209350626e-4932',
 176              'MAX' => '1.18973149535723176502e+4932',
 177              'EPSILON' => '1.08420217248550443401e-19',
 178              'DENORM_MIN' => '3.64519953188247460253e-4951',
 179          },
 180          113 =>
 181          {
 182              'MIN' => '3.36210314311209350626267781732175260e-4932',
 183              'MAX' => '1.18973149535723176508575932662800702e+4932',
 184              'EPSILON' => '1.92592994438723585305597794258492732e-34',
 185              'DENORM_MIN' => '6.47517511943802511092443895822764655e-4966',
 186          },
 187          );
 188
 189     my @types = (['FLT','F'], ['DBL',''], ['LDBL','L']);
 190     while (@types) {
 191         my ($mant_bits,$exp_bits) = @{ shift @bitsizes };
 192         my ($name,$suffix) = @{ shift @types };
 193
 194         my $h = $constants{$mant_bits};
 195         die "$0: weird number of mantissa bits." unless $h;
 196
 197         my $mant_dig = int (($mant_bits - 1) * log (2) / log (10));
 198         my $max_exp = 1 << ($exp_bits - 1);
 199         my $min_exp = 3 - $max_exp;
 200         my $max_10_exp = int ($max_exp * log (2) / log (10));
 201         my $min_10_exp = -int (-$min_exp * log (2) / log (10));
 202
 203         $result .= " -D__${name}_MANT_DIG__=$mant_bits";
 204         $result .= " -D__${name}_DIG__=$mant_dig";
 205         $result .= " -D__${name}_MIN_EXP__='($min_exp)'";
 206         $result .= " -D__${name}_MAX_EXP__=$max_exp";
 207         $result .= " -D__${name}_MIN_10_EXP__='($min_10_exp)'";
 208         $result .= " -D__${name}_MAX_10_EXP__=$max_10_exp";
 209         $result .= " -D__${name}_HAS_INFINITY__=" . ($has_inf ? '1' : '0');
 210         $result .= " -D__${name}_HAS_QUIET_NAN__=" . ($has_qnan ? '1' : '0');;
 211
 212         foreach my $inf (sort keys %$h) {
 213             $result .= " -D__${name}_${inf}__=" . $h->{$inf} . $suffix;
 214         }
 215     }
 216     return $result;
 217 }
 218
 219 # -----------------------------------------------------------------------------
 220
 221 sub add_specs {
 222     my ($spec) = @_;
 223     if ($spec eq 'sunos') {
 224         return " --os=$spec" .
 225             ' -DSVR4=1' .
 226             ' -D__STDC__=0' .
 227             ' -D_REENTRANT' .
 228             ' -D_SOLARIS_THREADS' .
 229             ' -DNULL="((void *)0)"';
 230     } elsif ($spec eq 'linux') {
 231         return " --os=$spec";
 232     } elsif ($spec eq 'gnu/kfreebsd') {
 233         return &add_specs ('unix') .
 234             ' -D__FreeBSD_kernel__=1';
 235     } elsif ($spec eq 'openbsd') {
 236         return " --os=$spec";
 237     } elsif ($spec eq 'freebsd') {
 238         return " --os=$spec";
 239     } elsif ($spec eq 'netbsd') {
 240         return " --os=$spec";
 241     } elsif ($spec eq 'darwin') {
 242         return " --os=$spec";
 243     } elsif ($spec eq 'gnu') {          # Hurd
 244         return &add_specs ('unix') .    # So, GNU is Unix, uh?
 245             ' -D__GNU__=1 -D__gnu_hurd__=1 -D__MACH__=1';
 246     } elsif ($spec eq 'unix') {
 247         return ' -Dunix=1 -D__unix=1 -D__unix__=1';
 248     } elsif ( $spec =~ /^cygwin/) {
 249         return ' --os=cygwin';
 250     } elsif ($spec eq 'i386') {
 251         $m32 = 1;
 252         return (
 253                 ' --arch=i386' .
 254                 &float_types (1, 1, 21, [24,8], [53,11], [64,15]));
 255     } elsif ($spec eq 'sparc') {
 256         return (
 257                 ' --arch=sparc' .
 258                 &float_types (1, 1, 33, [24,8], [53,11], [113,15]));
 259     } elsif ($spec eq 'sparc64') {
 260         return (
 261                 ' --arch=sparc64' .
 262                 &float_types (1, 1, 33, [24,8], [53,11], [113,15]));
 263     } elsif ($spec eq 'x86_64') {
 264         return (' --arch=x86_64' .
 265                 &float_types (1, 1, 33, [24,8], [53,11], [113,15]));
 266     } elsif ($spec eq 'ppc') {
 267         return (' --arch=ppc' .
 268                 &float_types (1, 1, 21, [24,8], [53,11], [113,15]));
 269     } elsif ($spec eq 'ppc64') {
 270         return (
 271                 ' --arch=ppc64' .
 272                 &float_types (1, 1, 21, [24,8], [53,11], [113,15]));
 273     } elsif ($spec eq 'ppc64be') {
 274         return &add_specs ('ppc64') . ' -mbig-endian -D_CALL_ELF=1';
 275     } elsif ($spec eq 'ppc64le') {
 276         return &add_specs ('ppc64') . ' -mlittle-endian -D_CALL_ELF=2';
 277     } elsif ($spec eq 's390x') {
 278         return (' -D_BIG_ENDIAN' .
 279                 ' --arch=s390x' .
 280                 &float_types (1, 1, 36, [24,8], [53,11], [113,15]));
 281     } elsif ($spec eq 'riscv32') {
 282         return (' --arch=riscv32' .
 283                 &float_types (1, 1, 33, [24,8], [53,11], [53,11]));
 284     } elsif ($spec eq 'riscv64') {
 285         return (' --arch=riscv64' .
 286                 &float_types (1, 1, 33, [24,8], [53,11], [113,15]));
 287     } elsif ($spec eq 'arm') {
 288         return (' --arch=arm' .
 289                 &float_types (1, 1, 36, [24,8], [53,11], [53, 11]));
 290     } elsif ($spec eq 'arm+hf') {
 291         return &add_specs ('arm') . ' -mfloat-abi=hard';
 292     } elsif ($spec eq 'aarch64') {
 293         return (' --arch=aarch64' .
 294                 &float_types (1, 1, 36, [24,8], [53,11], [113,15]));
 295     } elsif ($spec eq 'host_os_specs') {
 296         my $os = `uname -s`;
 297         chomp $os;
 298         return &add_specs (lc $os);
 299     } elsif ($spec eq 'host_arch_specs') {
 300         my $gccmachine;
 301         my $arch;
 302
 303         $gccmachine = `$ccom -dumpmachine`;
 304         chomp $gccmachine;
 305
 306         if ($gccmachine =~ '^aarch64-') {
 307             return &add_specs ('aarch64');
 308         } elsif ($gccmachine =~ '^arm-.*eabihf$') {
 309             return &add_specs ('arm+hf');
 310         } elsif ($gccmachine =~ '^arm-') {
 311             return &add_specs ('arm');
 312         } elsif ($gccmachine =~ '^i[23456]86-') {
 313             return &add_specs ('i386');
 314         } elsif ($gccmachine =~ '^(powerpc|ppc)64le-') {
 315             return &add_specs ('ppc64le');
 316         } elsif ($gccmachine =~ '^s390x-') {
 317             return &add_specs ('s390x');
 318         } elsif ($gccmachine eq 'x86_64-linux-gnux32') {
 319             return &add_specs ('x86_64') . ' -mx32';
 320         } elsif ($gccmachine =~ '^x86_64-') {
 321             return &add_specs ('x86_64');
 322         }
 323
 324         # fall back to uname -m to determine the specifics.
 325         # Note: this is only meaningful when using natively
 326         #       since information about the host is used to
 327         #       guess characteristics of the target.
 328
 329         $arch = `uname -m`;
 330         chomp $arch;
 331         if ($arch =~ /^(i.?86|athlon)$/i) {
 332             return &add_specs ('i386');
 333         } elsif ($arch =~ /^(sun4u)$/i) {
 334             return &add_specs ('sparc');
 335         } elsif ($arch =~ /^(x86_64)$/i) {
 336             return &add_specs ('x86_64');
 337         } elsif ($arch =~ /^(ppc)$/i) {
 338             return &add_specs ('ppc');
 339         } elsif ($arch =~ /^(ppc64)$/i) {
 340             return &add_specs ('ppc64be');
 341         } elsif ($arch =~ /^(ppc64le)$/i) {
 342             return &add_specs ('ppc64le');
 343         } elsif ($arch =~ /^(s390x)$/i) {
 344             return &add_specs ('s390x');
 345         } elsif ($arch =~ /^(sparc64)$/i) {
 346             return &add_specs ('sparc64');
 347         } elsif ($arch =~ /^arm(?:v[78]l)?$/i) {
 348             return &add_specs ('arm');
 349         } elsif ($arch =~ /^(aarch64)$/i) {
 350             return &add_specs ('aarch64');
 351         }
 352     } else {
 353         die "$0: invalid specs: $spec\n";
 354     }
 355 }
 356
 357 # -----------------------------------------------------------------------------