Merge with git+ssh://cvs.ucw.cz/projects/sherlock/GIT/sherlock.git#v3.8

[libucw.git] / lib / autoconf.cfg

diff --git a/lib/autoconf.cfg b/lib/autoconf.cfg
index 2fea596c734412421ad4fd68c0f88d3a79e2e873..3c81f034b021816b350b6c5ae30d0fcd089cf5d7 100644 (file)
--- a/lib/autoconf.cfg
+++ b/lib/autoconf.cfg
@@ -1,19 +1,136 @@
 # Automatic configuration of the UCW Library
 # (c) 2005 Martin Mares <mj@ucw.cz>
 
 # Automatic configuration of the UCW Library
 # (c) 2005 Martin Mares <mj@ucw.cz>
 

-Set("CC" => "gcc-3.0");
+### 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.";
+}
+
+### Compiler ###
+
+# Default compiler
+Test("CC", "Checking for C compiler", sub { return "gcc"; });
+
+# GCC version
+Test("GCCVER", "Checking for GCC version", sub {
+       my $gcc = Get("CC");
+       my $ver = `$gcc --version | sed '2,\$d; s/^\\(.* \\)\\?\\([0-9]*\\.[0-9]*\\).*/\\2/'`;
+       chomp $ver;
+       Fail "Unable to determine GCC version" if $? || $ver eq "";
+       return $ver;
+});
+my ($gccmaj, $gccmin) = split(/\./, Get("GCCVER"));
+my $gccver = 1000*$gccmaj + $gccmin;
+$gccver >= 3000 or Fail "GCC older than 3.0 doesn't support C99 well enough.";
+
+### CPU ###
+
+Test("ARCH", "Checking for machine architecture", sub {
+       my $mach = `uname -m`;
+       chomp $mach;
+       Fail "Unable to determine machine type" if $? || $mach eq "";
+       if ($mach =~ /^i[0-9]86$/) {
+               return "i386";
+       } elsif ($mach =~ /^(x86[_-]|amd)64$/) {
+               return "amd64";
+       } else {
+               return "unknown";
+       }
+});
+
+Test("CPU_ARCH", "Checking for CPU architecture", sub {
+       my $mach = Get("ARCH");
+       if ($mach eq "i386") {
+               Set("CPU_I386");
+               UnSet("CPU_64BIT_POINTERS");
+               Set("CPU_LITTLE_ENDIAN");
+               UnSet("CPU_BIG_ENDIAN");
+               Set("CPU_ALLOW_UNALIGNED");
+               Set("CPU_STRUCT_ALIGN" => 4);
+               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;
+
+                       # Try to understand CPU vendor, family and model [inspired by MPlayer's configure script]
+                       my $vendor = $pc{'vendor_id'} || "";
+                       my $family = $pc{'cpu family'} || 0;
+                       my $model  = $pc{'model'} || 0;
+                       if ($vendor eq "AuthenticAMD") {
+                               if ($family >= 6) {
+                                       if ($model >= 31 && $gccver >= 3004) { $arch = "athlon64"; }
+                                       elsif ($model >= 6 && $gccver >= 3003) { $arch = "athlon-xp"; }
+                                       else { $arch = "athlon"; }
+                               }
+                       } elsif ($vendor eq "GenuineIntel") {
+                               # We don't recognize Prescott and Nocona cores yet (gcc-3.4+)
+                               if ($family >= 15 && $gccver >= 3003) { $arch = "pentium4"; }
+                               elsif ($family >= 6 && $gccver >= 3003) {
+                                       if ($model >= 7) { $arch = "pentium3"; }
+                                       elsif ($model >= 3) { $arch = "pentium2"; }
+                               }
+                       }
+
+                       # No match on vendor, try the family
+                       if ($arch eq "") {
+                               if ($family >= 6) {
+                                       $arch = "i686";
+                               } elsif ($family >= 3) {
+                                       $arch = "i${family}86";
+                               }
+                       }
+                       if ($arch ne "") {
+                               Log "(using /proc/cpuinfo) ";
+                       } else {
+                               Log "(don't understand /proc/cpuinfo) ";
+                       }
+               }
+               return $arch ? $arch : "i386";
+       } elsif ($mach eq "amd64") {
+               Set("CPU_AMD64");
+               Set("CPU_64BIT_POINTERS");
+               Set("CPU_LITTLE_ENDIAN");
+               UnSet("CPU_BIG_ENDIAN");
+               Set("CPU_ALLOW_UNALIGNED");
+               Set("CPU_STRUCT_ALIGN" => 8);
+               return "x86-64";
+       } else {
+               return undef;
+       }
+});
+
+if (!IsSet("CPU_ARCH")) { Warn "CPU type not recognized, using defaults, keep fingers crossed."; }
+
+### Compiler and its Options ###

 
 # C flags: tell the compiler we're speaking C99
 Set("CLANG" => "-std=gnu99");
 
 # C optimizations
 
 # C flags: tell the compiler we're speaking C99
 Set("CLANG" => "-std=gnu99");
 
 # C optimizations

-Set("COPT" => '-O2 -fstrict-aliasing -march=$(CPU_ARCH)');
+Set("COPT" => '-O2');
+Append("COPT", '-march=$(CPU_ARCH)') if IsSet("CPU_ARCH");

 
 # C optimizations for highly exposed code
 Set("COPT2" => '-O3');
 
 # Warnings
 Set("CWARNS" => '-Wall -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -Winline');
 
 # C optimizations for highly exposed code
 Set("COPT2" => '-O3');
 
 # Warnings
 Set("CWARNS" => '-Wall -W -Wno-parentheses -Wstrict-prototypes -Wmissing-prototypes -Winline');

+Set("CWARNS_OFF" => '');

 
 # Linker flags
 Set("LOPT" => "");
 
 # Linker flags
 Set("LOPT" => "");


@@ -26,44 +143,40 @@ Set("CSHARED" => '-fPIC');
 Set("LSHARED" => '-shared -Wl,-soname,lib/$(@F)');
 
 # Extra switches depending on GCC version:
 Set("LSHARED" => '-shared -Wl,-soname,lib/$(@F)');
 
 # Extra switches depending on GCC version:

-# [FIXME]
-#GCCVER:=$(shell $(CC) --version | sed '2,$$d; s/^\(.* \)\?\([0-9]*\.[0-9]*\).*/\2/')
-#ifeq ($(GCCVER),3.3)
-#CWARNS+=-Wundef -Wredundant-decls
-#COPT+=-finline-limit=20000 --param max-inline-insns-auto=1000
-#endif
-#ifeq ($(GCCVER),3.4)
-#CWARNS+=-Wundef -Wredundant-decls
-#COPT+=-finline-limit=5000 --param large-function-insns=5000 --param inline-unit-growth=200 --param large-function-growth=400
-#endif
-
-# If debugging:
-Set("CDEBUG" => '-DDEBUG_ASSERTS -ggdb');
-#CDEBUG+=-DDEBUG_DIE_BY_ABORT
+if ($gccver == 3000) {
+       Append("COPT" => "-fstrict-aliasing");
+} elsif ($gccver == 3003) {
+       Append("CWARNS" => "-Wundef -Wredundant-decls");
+       Append("COPT" => "-finline-limit=20000 --param max-inline-insns-auto=1000");
+} elsif ($gccver == 3004) {
+       Append("CWARNS" => "-Wundef -Wredundant-decls");
+       Append("COPT" => "-finline-limit=2000 --param large-function-insns=5000 --param inline-unit-growth=200 --param large-function-growth=400");
+} elsif ($gccver == 4000) {
+       Append("CWARNS" => "-Wundef -Wredundant-decls -Wno-pointer-sign -Wdisabled-optimization -Wno-missing-field-initializers");
+       Append("CWARNS_OFF" => "-Wno-pointer-sign");
+       Append("COPT" => "-finline-limit=5000 --param large-function-insns=5000 --param inline-unit-growth=200 --param large-function-growth=400");
+} else {
+       Warn "Don't know anything about this GCC version, using default switches.\n";
+}
+
+if (IsSet("CONFIG_DEBUG")) {
+       # If debugging:
+       Set("DEBUG_ASSERTS");
+       Set("DEBUG_DIE_BY_ABORT") if Get("CONFIG_DEBUG") > 1;
+       Set("CDEBUG" => "-ggdb");
+} else {
+       # If building a release version:
+       Append("COPT" => "-fomit-frame-pointer");
+       Append("LOPT" => "-s");
+}
+
+# Decide how will lib/partmap.c work
+Set("PARTMAP_IS_MMAP") if IsSet("CPU_64BIT_POINTERS");

 
 # If debugging memory allocations:
 #LIBS+=-lefence
 #CDEBUG+=-DDEBUG_DMALLOC
 #LIBS+=-ldmalloc
 
 
 # If debugging memory allocations:
 #LIBS+=-lefence
 #CDEBUG+=-DDEBUG_DMALLOC
 #LIBS+=-ldmalloc
 

-# If building release versions:
-#CDEBUG=
-#COPT+=-fomit-frame-pointer
-#LOPT+=-s
-
-### CPU Type and Features ###
-
-Set("CPU_ARCH" => 'i686');
-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;
 # Return success
 1;