Configurations/15-android.conf

   1 #### Android...
   2 #
   3 # See NOTES.ANDROID for details, and don't miss platform-specific
   4 # comments below...
   5
   6 {
   7     my $android_ndk = {};
   8     my %triplet = (
   9         arm    => "arm-linux-androideabi",
  10         arm64  => "aarch64-linux-android",
  11         mips   => "mipsel-linux-android",
  12         mips64 => "mips64el-linux-android",
  13         x86    => "i686-linux-android",
  14         x86_64 => "x86_64-linux-android",
  15     );
  16
  17     sub android_ndk {
  18         unless (%$android_ndk) {
  19             if ($now_printing =~ m|^android|) {
  20                 return $android_ndk = { bn_ops => "BN_AUTO" };
  21             }
  22
  23             my $ndk = $ENV{ANDROID_NDK};
  24             die "\$ANDROID_NDK is not defined"  if (!$ndk);
  25             die "\$ANDROID_NDK=$ndk is invalid" if (!-d "$ndk/platforms");
  26
  27             my $ndkver = undef;
  28
  29             if (open my $fh, "<$ndk/source.properties") {
  30                 local $_;
  31                 while(<$fh>) {
  32                     if (m|Pkg\.Revision\s*=\s*([0-9]+)|) {
  33                         $ndkver = $1;
  34                         last;
  35                     }
  36                 }
  37                 close $fh;
  38             }
  39
  40             my $sysroot;
  41
  42             if (!($sysroot = $ENV{CROSS_SYSROOT})) {
  43                 my $api = "*";
  44
  45                 # see if user passed -D__ANDROID_API__=N
  46                 foreach (@{$useradd{CPPDEFINES}}, @{$user{CPPFLAGS}}) {
  47                     if (m|__ANDROID_API__=([0-9]+)|) {
  48                         $api = $1;
  49                         last;
  50                     }
  51                 }
  52
  53                 # list available platforms (numerically)
  54                 my @platforms = sort { $a =~ m/-([0-9]+)$/; my $aa = $1;
  55                                        $b =~ m/-([0-9]+)$/; $aa <=> $1;
  56                                      } glob("$ndk/platforms/android-$api");
  57                 die "no $ndk/platforms/android-$api" if ($#platforms < 0);
  58
  59                 $config{target} =~ m|[^-]+-([^-]+)$|;   # split on dash
  60                 $sysroot = "@platforms[$#platforms]/arch-$1";
  61             }
  62             die "no sysroot=$sysroot"   if (!-d $sysroot);
  63
  64             $sysroot =~ m|/android-([0-9]+)/arch-(\w+)/?$|;
  65             my ($api, $arch) = ($1, $2);
  66
  67             my $triarch = $triplet{$arch};
  68             my $cflags = "-Wa,--noexecstack";
  69             my $cppflags;
  70
  71             # see if there is NDK clang on $PATH
  72             if (which("clang") =~ m|^$ndk/.*/prebuilt/([^/]+)/|) {
  73                 my $host=$1;
  74                 # harmonize with gcc default
  75                 my $arm = $ndkver > 16 ? "armv7a" : "armv5te";
  76                 (my $tridefault = $triarch) =~ s/^arm-/$arm-/;
  77                 (my $tritools   = $triarch) =~ s/(?:x|i6)86(_64)?-.*/x86$1/;
  78                 $cflags .= " -target $tridefault "
  79                         .  "-gcc-toolchain \$(ANDROID_NDK)/toolchains"
  80                         .  "/$tritools-4.9/prebuilt/$host";
  81                 $user{CC} = "clang" if ($user{CC} !~ m|clang|);
  82                 $user{CROSS_COMPILE} = undef;
  83             } elsif ($user{CC} eq "clang") {
  84                 die "no NDK clang on \$PATH";
  85             } else {
  86                 if (which("$triarch-gcc") !~ m|^$ndk/.*/prebuilt/([^/]+)/|) {
  87                     die "no NDK $triarch-gcc on \$PATH";
  88                 }
  89                 $cflags .= " -mandroid";
  90                 $user{CROSS_COMPILE} = "$triarch-";
  91             }
  92
  93             if (!-d "$sysroot/usr/include") {
  94                 my $incroot = "$ndk/sysroot/usr/include";
  95                 die "no $incroot"          if (!-d $incroot);
  96                 die "no $incroot/$triarch" if (!-d "$incroot/$triarch");
  97                 $incroot =~ s|^$ndk/||;
  98                 $cppflags  = "-D__ANDROID_API__=$api";
  99                 $cppflags .= " -isystem \$(ANDROID_NDK)/$incroot/$triarch";
 100                 $cppflags .= " -isystem \$(ANDROID_NDK)/$incroot";
 101             }
 102
 103             $sysroot =~ s|^$ndk/||;
 104             $android_ndk = {
 105                 cflags   => "$cflags --sysroot=\$(ANDROID_NDK)/$sysroot",
 106                 cppflags => $cppflags,
 107                 bn_ops   => $arch =~ m/64$/ ? "SIXTY_FOUR_BIT_LONG"
 108                                             : "BN_LLONG",
 109             };
 110         }
 111
 112         return $android_ndk;
 113     }
 114 }
 115
 116 my %targets = (
 117     "android" => {
 118         inherit_from     => [ "linux-generic32" ],
 119         template         => 1,
 120         ################################################################
 121         # Special note about -pie. The underlying reason is that
 122         # Lollipop refuses to run non-PIE. But what about older systems
 123         # and NDKs? -fPIC was never problem, so the only concern is -pie.
 124         # Older toolchains, e.g. r4, appear to handle it and binaries
 125         # turn out mostly functional. "Mostly" means that oldest
 126         # Androids, such as Froyo, fail to handle executable, but newer
 127         # systems are perfectly capable of executing binaries targeting
 128         # Froyo. Keep in mind that in the nutshell Android builds are
 129         # about JNI, i.e. shared libraries, not applications.
 130         cflags           => add(sub { android_ndk()->{cflags} }),
 131         cppflags         => add(sub { android_ndk()->{cppflags} }),
 132         cxxflags         => add(sub { android_ndk()->{cflags} }),
 133         bn_ops           => sub { android_ndk()->{bn_ops} },
 134         bin_cflags       => "-pie",
 135     },
 136     "android-arm" => {
 137         ################################################################
 138         # Contemporary Android applications can provide multiple JNI
 139         # providers in .apk, targeting multiple architectures. Among
 140         # them there is "place" for two ARM flavours: generic eabi and
 141         # armv7-a/hard-float. However, it should be noted that OpenSSL's
 142         # ability to engage NEON is not constrained by ABI choice, nor
 143         # is your ability to call OpenSSL from your application code
 144         # compiled with floating-point ABI other than default 'soft'.
 145         # (Latter thanks to __attribute__((pcs("aapcs"))) declaration.)
 146         # This means that choice of ARM libraries you provide in .apk
 147         # is driven by application needs. For example if application
 148         # itself benefits from NEON or is floating-point intensive, then
 149         # it might be appropriate to provide both libraries. Otherwise
 150         # just generic eabi would do. But in latter case it would be
 151         # appropriate to
 152         #
 153         #   ./Configure android-arm -D__ARM_MAX_ARCH__=8
 154         #
 155         # in order to build "universal" binary and allow OpenSSL take
 156         # advantage of NEON when it's available.
 157         #
 158         # Keep in mind that (just like with linux-armv4) we rely on
 159         # compiler defaults, which is not necessarily what you had
 160         # in mind, in which case you would have to pass additional
 161         # -march and/or -mfloat-abi flags. NDK defaults to armv5te.
 162         # Newer NDK versions reportedly require additional -latomic.
 163         #
 164         inherit_from     => [ "android", asm("armv4_asm") ],
 165         bn_ops           => add("RC4_CHAR"),
 166     },
 167     "android-arm64" => {
 168         inherit_from     => [ "android", asm("aarch64_asm") ],
 169         bn_ops           => add("RC4_CHAR"),
 170         perlasm_scheme   => "linux64",
 171     },
 172
 173     "android-mips" => {
 174         inherit_from     => [ "android", asm("mips32_asm") ],
 175         bn_ops           => add("RC4_CHAR"),
 176         perlasm_scheme   => "o32",
 177     },
 178     "android-mips64" => {
 179         ################################################################
 180         # You are more than likely have to specify target processor
 181         # on ./Configure command line. Trouble is that toolchain's
 182         # default is MIPS64r6 (at least in r10d), but there are no
 183         # such processors around (or they are too rare to spot one).
 184         # Actual problem is that MIPS64r6 is binary incompatible
 185         # with previous MIPS ISA versions, in sense that unlike
 186         # prior versions original MIPS binary code will fail.
 187         #
 188         inherit_from     => [ "android", asm("mips64_asm") ],
 189         bn_ops           => add("RC4_CHAR"),
 190         perlasm_scheme   => "64",
 191     },
 192
 193     "android-x86" => {
 194         inherit_from     => [ "android", asm("x86_asm") ],
 195         CFLAGS           => add(picker(release => "-fomit-frame-pointer")),
 196         bn_ops           => add("RC4_INT"),
 197         perlasm_scheme   => "android",
 198     },
 199     "android-x86_64" => {
 200         inherit_from     => [ "android", asm("x86_64_asm") ],
 201         bn_ops           => add("RC4_INT"),
 202         perlasm_scheme   => "elf",
 203     },
 204
 205     ####################################################################
 206     # Backward compatible targets, (might) requre $CROSS_SYSROOT
 207     #
 208     "android-armeabi" => {
 209         inherit_from     => [ "android-arm" ],
 210     },
 211     "android64" => {
 212         inherit_from     => [ "android" ],
 213     },
 214     "android64-aarch64" => {
 215         inherit_from     => [ "android-arm64" ],
 216     },
 217     "android64-x86_64" => {
 218         inherit_from     => [ "android-x86_64" ],
 219     },
 220     "android64-mips64" => {
 221         inherit_from     => [ "android-mips64" ],
 222     },
 223 );