1#### Android... 2# 3# See NOTES.ANDROID for details, and don't miss platform-specific 4# comments below... 5 6{ 7 use File::Spec::Functions; 8 9 my $android_ndk = {}; 10 my %triplet = ( 11 arm => "arm-linux-androideabi", 12 arm64 => "aarch64-linux-android", 13 mips => "mipsel-linux-android", 14 mips64 => "mips64el-linux-android", 15 x86 => "i686-linux-android", 16 x86_64 => "x86_64-linux-android", 17 ); 18 19 sub android_ndk { 20 unless (%$android_ndk) { 21 if ($now_printing =~ m|^android|) { 22 return $android_ndk = { bn_ops => "BN_AUTO" }; 23 } 24 25 my $ndk_var; 26 my $ndk; 27 foreach (qw(ANDROID_NDK_HOME ANDROID_NDK)) { 28 $ndk_var = $_; 29 $ndk = $ENV{$ndk_var}; 30 last if defined $ndk; 31 } 32 die "\$ANDROID_NDK_HOME is not defined" if (!$ndk); 33 if (!-d "$ndk/platforms" && !-f "$ndk/AndroidVersion.txt") { 34 # $ndk/platforms is traditional "all-inclusive" NDK, while 35 # $ndk/AndroidVersion.txt is so-called standalone toolchain 36 # tailored for specific target down to API level. 37 die "\$ANDROID_NDK_HOME=$ndk is invalid"; 38 } 39 $ndk = canonpath($ndk); 40 41 my $ndkver = undef; 42 43 if (open my $fh, "<$ndk/source.properties") { 44 local $_; 45 while(<$fh>) { 46 if (m|Pkg\.Revision\s*=\s*([0-9]+)|) { 47 $ndkver = $1; 48 last; 49 } 50 } 51 close $fh; 52 } 53 54 my ($sysroot, $api, $arch); 55 56 $config{target} =~ m|[^-]+-([^-]+)$|; # split on dash 57 $arch = $1; 58 59 if ($sysroot = $ENV{CROSS_SYSROOT}) { 60 $sysroot =~ m|/android-([0-9]+)/arch-(\w+)/?$|; 61 ($api, $arch) = ($1, $2); 62 } elsif (-f "$ndk/AndroidVersion.txt") { 63 $sysroot = "$ndk/sysroot"; 64 } else { 65 $api = "*"; 66 67 # see if user passed -D__ANDROID_API__=N 68 foreach (@{$useradd{CPPDEFINES}}, @{$user{CPPFLAGS}}) { 69 if (m|__ANDROID_API__=([0-9]+)|) { 70 $api = $1; 71 last; 72 } 73 } 74 75 # list available platforms (numerically) 76 my @platforms = sort { $a =~ m/-([0-9]+)$/; my $aa = $1; 77 $b =~ m/-([0-9]+)$/; $aa <=> $1; 78 } glob("$ndk/platforms/android-$api"); 79 die "no $ndk/platforms/android-$api" if ($#platforms < 0); 80 81 $sysroot = "@platforms[$#platforms]/arch-$arch"; 82 $sysroot =~ m|/android-([0-9]+)/arch-$arch|; 83 $api = $1; 84 } 85 die "no sysroot=$sysroot" if (!-d $sysroot); 86 87 my $triarch = $triplet{$arch}; 88 my $cflags; 89 my $cppflags; 90 91 # see if there is NDK clang on $PATH, "universal" or "standalone" 92 if (which("clang") =~ m|^$ndk/.*/prebuilt/([^/]+)/|) { 93 my $host=$1; 94 # harmonize with gcc default 95 my $arm = $ndkver > 16 ? "armv7a" : "armv5te"; 96 (my $tridefault = $triarch) =~ s/^arm-/$arm-/; 97 (my $tritools = $triarch) =~ s/(?:x|i6)86(_64)?-.*/x86$1/; 98 $cflags .= " -target $tridefault " 99 . "-gcc-toolchain \$($ndk_var)/toolchains" 100 . "/$tritools-4.9/prebuilt/$host"; 101 $user{CC} = "clang" if ($user{CC} !~ m|clang|); 102 $user{CROSS_COMPILE} = undef; 103 if (which("llvm-ar") =~ m|^$ndk/.*/prebuilt/([^/]+)/|) { 104 $user{AR} = "llvm-ar"; 105 $user{ARFLAGS} = [ "rs" ]; 106 $user{RANLIB} = ":"; 107 } 108 } elsif (-f "$ndk/AndroidVersion.txt") { #"standalone toolchain" 109 my $cc = $user{CC} // "clang"; 110 # One can probably argue that both clang and gcc should be 111 # probed, but support for "standalone toolchain" was added 112 # *after* announcement that gcc is being phased out, so 113 # favouring clang is considered adequate. Those who insist 114 # have option to enforce test for gcc with CC=gcc. 115 if (which("$triarch-$cc") !~ m|^$ndk|) { 116 die "no NDK $triarch-$cc on \$PATH"; 117 } 118 $user{CC} = $cc; 119 $user{CROSS_COMPILE} = "$triarch-"; 120 } elsif ($user{CC} eq "clang") { 121 die "no NDK clang on \$PATH"; 122 } else { 123 if (which("$triarch-gcc") !~ m|^$ndk/.*/prebuilt/([^/]+)/|) { 124 die "no NDK $triarch-gcc on \$PATH"; 125 } 126 $cflags .= " -mandroid"; 127 $user{CROSS_COMPILE} = "$triarch-"; 128 } 129 130 if (!-d "$sysroot/usr/include") { 131 my $incroot = "$ndk/sysroot/usr/include"; 132 die "no $incroot" if (!-d $incroot); 133 die "no $incroot/$triarch" if (!-d "$incroot/$triarch"); 134 $incroot =~ s|^$ndk/||; 135 $cppflags = "-D__ANDROID_API__=$api"; 136 $cppflags .= " -isystem \$($ndk_var)/$incroot/$triarch"; 137 $cppflags .= " -isystem \$($ndk_var)/$incroot"; 138 } 139 140 $sysroot =~ s|^$ndk/||; 141 $android_ndk = { 142 cflags => "$cflags --sysroot=\$($ndk_var)/$sysroot", 143 cppflags => $cppflags, 144 bn_ops => $arch =~ m/64$/ ? "SIXTY_FOUR_BIT_LONG" 145 : "BN_LLONG", 146 }; 147 } 148 149 return $android_ndk; 150 } 151} 152 153my %targets = ( 154 "android" => { 155 inherit_from => [ "linux-generic32" ], 156 template => 1, 157 ################################################################ 158 # Special note about -pie. The underlying reason is that 159 # Lollipop refuses to run non-PIE. But what about older systems 160 # and NDKs? -fPIC was never problem, so the only concern is -pie. 161 # Older toolchains, e.g. r4, appear to handle it and binaries 162 # turn out mostly functional. "Mostly" means that oldest 163 # Androids, such as Froyo, fail to handle executable, but newer 164 # systems are perfectly capable of executing binaries targeting 165 # Froyo. Keep in mind that in the nutshell Android builds are 166 # about JNI, i.e. shared libraries, not applications. 167 cflags => add(sub { android_ndk()->{cflags} }), 168 cppflags => add(sub { android_ndk()->{cppflags} }), 169 cxxflags => add(sub { android_ndk()->{cflags} }), 170 bn_ops => sub { android_ndk()->{bn_ops} }, 171 bin_cflags => "-pie", 172 enable => [ ], 173 }, 174 "android-arm" => { 175 ################################################################ 176 # Contemporary Android applications can provide multiple JNI 177 # providers in .apk, targeting multiple architectures. Among 178 # them there is "place" for two ARM flavours: generic eabi and 179 # armv7-a/hard-float. However, it should be noted that OpenSSL's 180 # ability to engage NEON is not constrained by ABI choice, nor 181 # is your ability to call OpenSSL from your application code 182 # compiled with floating-point ABI other than default 'soft'. 183 # (Latter thanks to __attribute__((pcs("aapcs"))) declaration.) 184 # This means that choice of ARM libraries you provide in .apk 185 # is driven by application needs. For example if application 186 # itself benefits from NEON or is floating-point intensive, then 187 # it might be appropriate to provide both libraries. Otherwise 188 # just generic eabi would do. But in latter case it would be 189 # appropriate to 190 # 191 # ./Configure android-arm -D__ARM_MAX_ARCH__=8 192 # 193 # in order to build "universal" binary and allow OpenSSL take 194 # advantage of NEON when it's available. 195 # 196 # Keep in mind that (just like with linux-armv4) we rely on 197 # compiler defaults, which is not necessarily what you had 198 # in mind, in which case you would have to pass additional 199 # -march and/or -mfloat-abi flags. NDK defaults to armv5te. 200 # Newer NDK versions reportedly require additional -latomic. 201 # 202 inherit_from => [ "android", asm("armv4_asm") ], 203 bn_ops => add("RC4_CHAR"), 204 }, 205 "android-arm64" => { 206 inherit_from => [ "android", asm("aarch64_asm") ], 207 bn_ops => add("RC4_CHAR"), 208 perlasm_scheme => "linux64", 209 }, 210 211 "android-mips" => { 212 inherit_from => [ "android", asm("mips32_asm") ], 213 bn_ops => add("RC4_CHAR"), 214 perlasm_scheme => "o32", 215 }, 216 "android-mips64" => { 217 ################################################################ 218 # You are more than likely have to specify target processor 219 # on ./Configure command line. Trouble is that toolchain's 220 # default is MIPS64r6 (at least in r10d), but there are no 221 # such processors around (or they are too rare to spot one). 222 # Actual problem is that MIPS64r6 is binary incompatible 223 # with previous MIPS ISA versions, in sense that unlike 224 # prior versions original MIPS binary code will fail. 225 # 226 inherit_from => [ "android", asm("mips64_asm") ], 227 bn_ops => add("RC4_CHAR"), 228 perlasm_scheme => "64", 229 }, 230 231 "android-x86" => { 232 inherit_from => [ "android", asm("x86_asm") ], 233 CFLAGS => add(picker(release => "-fomit-frame-pointer")), 234 bn_ops => add("RC4_INT"), 235 perlasm_scheme => "android", 236 }, 237 "android-x86_64" => { 238 inherit_from => [ "android", asm("x86_64_asm") ], 239 bn_ops => add("RC4_INT"), 240 perlasm_scheme => "elf", 241 }, 242 243 #################################################################### 244 # Backward compatible targets, (might) require $CROSS_SYSROOT 245 # 246 "android-armeabi" => { 247 inherit_from => [ "android-arm" ], 248 }, 249 "android64" => { 250 inherit_from => [ "android" ], 251 }, 252 "android64-aarch64" => { 253 inherit_from => [ "android-arm64" ], 254 }, 255 "android64-x86_64" => { 256 inherit_from => [ "android-x86_64" ], 257 }, 258 "android64-mips64" => { 259 inherit_from => [ "android-mips64" ], 260 }, 261); 262