lib/autoconf.cfg

   1 # Automatic configuration of the UCW Library
   2 # (c) 2005 Martin Mares <mj@ucw.cz>
   3
   4 ### OS ###
   5
   6 Test("OS", "Checking on which OS we run", sub {
   7         my $os = `uname`;
   8         chomp $os;
   9         Fail "Unable to determine OS type" if $? || $os eq "";
  10         return $os;
  11 });
  12
  13 if (Get("OS") eq "Linux") {
  14         Set("CONFIG_LINUX");
  15 } else {
  16         Fail "Don't know how to run on this operating system.";
  17 }
  18
  19 ### CPU ###
  20
  21 Test("CPU_ARCH", "Checking for CPU architecture", sub {
  22         my $mach = `uname -m`;
  23         chomp $mach;
  24         Fail "Unable to determine machine type" if $? || $mach eq "";
  25         if ($mach =~ /^i[0-9]86$/) {
  26                 Set("CPU_I386");
  27                 my $arch = "";
  28                 if (IsSet("CONFIG_EXACT_CPU") && IsSet("CONFIG_LINUX") && open X, "/proc/cpuinfo") {
  29                         my %pc = ();
  30                         while (<X>) {
  31                                 chomp;
  32                                 /^$/ && last;
  33                                 /^([^\t]+)\t+:\s*(.*)$/ and $pc{$1}=$2;
  34                         }
  35                         close X;
  36
  37                         # Try to understand CPU vendor, family and model [inspired by MPlayer's configure script]
  38                         my $vendor = $pc{'vendor_id'} || "";
  39                         my $family = $pc{'cpu family'} || 0;
  40                         my $model  = $pc{'model'} || 0;
  41                         if ($vendor eq "AuthenticAMD") {
  42                                 if ($family >= 6) {
  43                                         if ($model >= 31) { $arch = "athlon64"; }
  44                                         elsif ($model >= 6) { $arch = "athlon-xp"; }
  45                                         else { $arch = "athlon"; }
  46                                 }
  47                         } elsif ($vendor eq "GenuineIntel") {
  48                                 # We don't recognize Prescott and Nocona cores yet
  49                                 if ($family >= 15) { $arch = "pentium4"; }
  50                                 elsif ($family >= 6) {
  51                                         if ($model >= 7) { $arch = "pentium3"; }
  52                                         elsif ($model >= 3) { $arch = "pentium2"; }
  53                                 }
  54                         }
  55
  56                         # No match on vendor, try the family
  57                         if ($arch eq "") {
  58                                 if ($family >= 6) {
  59                                         $arch = "i686";
  60                                 } elsif ($family >= 3) {
  61                                         $arch = "i${family}86";
  62                                 }
  63                         }
  64                         if ($arch ne "") {
  65                                 Log "(using /proc/cpuinfo) ";
  66                         } else {
  67                                 Log "(don't understand /proc/cpuinfo) ";
  68                         }
  69                 }
  70                 return $arch ? $arch : "i386";
  71         } else {
  72                 return "unknown";
  73         }
  74 });
  75 if (Get("CPU_ARCH") eq "unknown") { Warn "CPU type not recognized, using defaults, keep fingers crossed."; }
  76
  77 ### Compiler and its Options ###
  78
  79 # Default compiler
  80 Test("CC", "Checking for C compiler", sub { return "gcc"; });
  81
  82 # GCC version
  83 Test("GCCVER", "Checking for GCC version", sub {
  84         my $gcc = Get("CC");
  85         my $ver = `$gcc --version | sed '2,\$d; s/^\\(.* \\)\\?\\([0-9]*\\.[0-9]*\\).*/\\2/'`;
  86         chomp $ver;
  87         Fail "Unable to determine GCC version" if $? || $ver eq "";
  88         return $ver;
  89 });
  90
  91 # C flags: tell the compiler we're speaking C99
  92 Set("CLANG" => "-std=gnu99");
  93
  94 # C optimizations
  95 Set("COPT" => '-O2 -fstrict-aliasing -march=$(CPU_ARCH)');
  96 Append("COPT", '-march=$(CPU_ARCH)') if IsSet("CPU_ARCH");
  97
  98 # C optimizations for highly exposed code
  99 Set("COPT2" => '-O3');
 100
 101 # Warnings
 102 Set("CWARNS" => '-Wall -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -Winline');
 103
 104 # Linker flags
 105 Set("LOPT" => "");
 106
 107 # Extra libraries
 108 Set("LIBS" => "");
 109
 110 # Extra flags for compiling and linking shared libraries
 111 Set("CSHARED" => '-fPIC');
 112 Set("LSHARED" => '-shared -Wl,-soname,lib/$(@F)');
 113
 114 # Extra switches depending on GCC version:
 115 if (Get("GCCVER") eq "3.0") {
 116 } elsif (Get("GCCVER") eq "3.3") {
 117         Append("CWARNS" => "-Wundef -Wredundant-decls");
 118         Append("COPT" => "-finline-limit=20000 --param max-inline-insns-auto=1000");
 119 } elsif (Get("GCCVER") eq "3.4") {
 120         Append("CWARNS" => "-Wundef -Wredundant-decls");
 121         Append("COPT" => "-finline-limit=5000 --param large-function-insns=5000 --param inline-unit-growth=200 --param large-function-growth=400");
 122 } else {
 123         Warn "Don't know anything about this GCC version, using default switches.\n";
 124 }
 125
 126 if (IsSet("CONFIG_DEBUG")) {
 127         # If debugging:
 128         Set("DEBUG_ASSERTS");
 129         Set("DEBUG_DIE_BY_ABORT") if Get("CONFIG_DEBUG") > 1;
 130         Set("CDEBUG" => "-ggdb");
 131 } else {
 132         # If building a release version:
 133         Append("COPT" => "-fomit-frame-pointer");
 134         Append("LOPT" => "-s");
 135 }
 136
 137 # If debugging memory allocations:
 138 #LIBS+=-lefence
 139 #CDEBUG+=-DDEBUG_DMALLOC
 140 #LIBS+=-ldmalloc
 141
 142 ### CPU Type and Features ###
 143
 144 Set("CPU_LITTLE_ENDIAN");
 145 #CPU_BIG_ENDIAN=1
 146 Set("CPU_ALLOW_UNALIGNED");
 147 Set("CPU_STRUCT_ALIGN" => 4);
 148 Set("CPU_64BIT_POINTERS");
 149
 150 # Return success
 151 1;