Automatic detection of host OS and also partial automatic detection of the

[libucw.git] / lib / autoconf.cfg

diff --git a/lib/autoconf.cfg b/lib/autoconf.cfg
index fed6f6c933906d31f7c3a6e24ed2245442a97d40..7bb50c7013b39a1bfe6c82431b324f3f8f971071 100644 (file)
--- a/lib/autoconf.cfg
+++ b/lib/autoconf.cfg
@@ -1,6 +1,54 @@
 # Automatic configuration of the UCW Library
 # (c) 2005 Martin Mares <mj@ucw.cz>
 
+### OS ###
+
+Test("OS", "Checking on which OS we run", sub {
+       my $os = `uname`;
+       chomp $os;
+       Fail "Unable to determine OS type" if $? || $os eq "";
+       return $os;
+});
+
+if (Get("OS") eq "Linux") {
+       Set("CONFIG_LINUX");
+} else {
+       Fail "Don't know how to run on this operating system.";
+}
+
+### CPU ###
+
+Test("CPU_ARCH", "Checking for CPU architecture", sub {
+       my $mach = `uname -m`;
+       chomp $mach;
+       Fail "Unable to determine machine type" if $? || $mach eq "";
+       if ($mach =~ /^i[0-9]86$/) {
+               Set("CPU_I386");
+               my $arch = "";
+               if (IsSet("CONFIG_EXACT_CPU") && IsSet("CONFIG_LINUX") && open X, "/proc/cpuinfo") {
+                       my %pc = ();
+                       while (<X>) {
+                               chomp;
+                               /^$/ && last;
+                               /^([^\t]+)\t+:\s*(.*)$/ and $pc{$1}=$2;
+                       }
+                       close X;
+                       if ($pc{'vendor_id'} eq "AuthenticAMD" && $pc{'cpu family'} >= 6) {
+                               $arch = "i686";
+                       }
+                       if ($arch ne "") {
+                               Log "(according to /proc/cpuinfo) ";
+                       } else {
+                               Log "(don't understand /proc/cpuinfo) ";
+                       }
+               }
+               return $arch ? $arch : "i386";
+       } else {
+               return "unknown";
+       }
+});
+if (Get("CPU_ARCH") eq "unknown") { Warn "CPU type not recognized, using defaults, keep fingers crossed."; }
+
 ### Compiler and its Options ###
 
 # Default compiler
@@ -20,6 +68,7 @@ Set("CLANG" => "-std=gnu99");
 
 # C optimizations
 Set("COPT" => '-O2 -fstrict-aliasing -march=$(CPU_ARCH)');
+Append("COPT", '-march=$(CPU_ARCH)') if IsSet("CPU_ARCH");
 
 # C optimizations for highly exposed code
 Set("COPT2" => '-O3');
@@ -46,7 +95,7 @@ if (Get("GCCVER") eq "3.0") {
        Append("CWARNS" => "-Wundef -Wredundant-decls");
        Append("COPT" => "-finline-limit=5000 --param large-function-insns=5000 --param inline-unit-growth=200 --param large-function-growth=400");
 } else {
-       Log "WARNING: Don't know anything about this GCC version, using default switches.\n";
+       Warn "Don't know anything about this GCC version, using default switches.\n";
 }
 
 if (IsSet("CONFIG_DEBUG")) {
@@ -67,17 +116,11 @@ if (IsSet("CONFIG_DEBUG")) {
 
 ### CPU Type and Features ###
 
-Set("CPU_ARCH" => 'i686') if !IsSet("CPU_ARCH");
-Set("CPU_I386");
 Set("CPU_LITTLE_ENDIAN");
 #CPU_BIG_ENDIAN=1
 Set("CPU_ALLOW_UNALIGNED");
 Set("CPU_STRUCT_ALIGN" => 4);
 Set("CPU_64BIT_POINTERS");
 
-### OS Type ###
-
-Set("CONFIG_LINUX");
-
 # Return success
 1;