Configuration
-------------
- Android is naturally cross-compiled target and you can't use ./config.
+ Android is a naturally cross-compiled target and you can't use ./config.
You have to use ./Configure and name your target explicitly; there are
android-arm, android-arm64, android-mips, android-mip64, android-x86
- and android-x86_64. Do not pass --cross-compile-prefix (as you might
- be tempted), as it will be "calculated" automatically based on chosen
- platform. Though you still need to know the prefix to extend your PATH,
- in order to invoke $(CROSS_COMPILE)gcc and company. (Configure will fail
- and give you a hint if you get it wrong.) Apart from PATH adjustment
- you need to set ANDROID_NDK environment to point at NDK directory
- as /some/where/android-ndk-<ver>. NDK customarily supports multiple
- Android API levels, e.g. android-14, android-21, etc. By default latest
- one available is chosen. If you need to target older platform, pass
- additional -D__ANDROID_API__=N to Configure. N is numeric value of the
- target platform version. For example, to compile for ICS on ARM with
- NDK 10d:
-
- ANDROID_NDK=/some/where/android-ndk-10d
- PATH=$ANDROID_NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin:$PATH
+ and android-x86_64 (*MIPS targets are no longer supported with NDK R20+).
+ Do not pass --cross-compile-prefix (as you might be tempted), as it will
+ be "calculated" automatically based on chosen platform. Though you still
+ need to know the prefix to extend your PATH, in order to invoke
+ $(CROSS_COMPILE)clang [*gcc on NDK 19 and lower] and company. (Configure
+ will fail and give you a hint if you get it wrong.) Apart from PATH
+ adjustment you need to set ANDROID_NDK_ROOT environment to point at the
+ NDK directory. If you're using a side-by-side NDK the path will look
+ something like /some/where/android-sdk/ndk/<ver>, and for a standalone
+ NDK the path will be something like /some/where/android-ndk-<ver>.
+ Both variables are significant at both configuration and compilation times.
+ The NDK customarily supports multiple Android API levels, e.g. android-14,
+ android-21, etc. By default latest API level is chosen. If you need to
+ target an older platform pass the argument -D__ANDROID_API__=N to Configure,
+ with N being the numerical value of the target platform version. For example,
+ to compile for Android 10 arm64 with a side-by-side NDK r20.0.5594570
+
+ export ANDROID_NDK_ROOT=/home/whoever/Android/android-sdk/ndk/20.0.5594570
+ PATH=$ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/linux-x86_64/bin:$ANDROID_NDK_ROOT/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin:$PATH
+ ./Configure android-arm64 -D__ANDROID_API__=29
+ make
+
+ Older versions of the NDK have GCC under their common prebuilt tools directory, so the bin path
+ will be slightly different. EG: to compile for ICS on ARM with NDK 10d:
+
+ export ANDROID_NDK_ROOT=/some/where/android-ndk-10d
+ PATH=$ANDROID_NDK_ROOT/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin:$PATH
./Configure android-arm -D__ANDROID_API__=14
+ make
Caveat lector! Earlier OpenSSL versions relied on additional CROSS_SYSROOT
- variable set to $ANDROID_NDK/platforms/android-<api>/arch-<arch> to
+ variable set to $ANDROID_NDK
_ROOT/platforms/android-<api>/arch-<arch> to
appoint headers-n-libraries' location. It's still recognized in order
to facilitate migration from older projects. However, since API level
appears in CROSS_SYSROOT value, passing -D__ANDROID_API__=N can be in
conflict, and mixing the two is therefore not supported. Migration to
CROSS_SYSROOT-less setup is recommended.
- One can engage clang by adjusting PATH to cover NDK's clang. Just keep
- in mind that if you miss it, Configure will try to use gcc... Also,
- PATH would need even further adjustment to cover unprefixed, yet
- target-specific, ar and ranlib (or not, if you use binutils-multiarch
- on your Linux).
+ One can engage clang by adjusting PATH to cover same NDK's clang. Just
+ keep in mind that if you miss it, Configure will try to use gcc...
+ Also, PATH would need even further adjustment to cover unprefixed, yet
+ target-specific, ar and ranlib. It's possible that you don't need to
+ bother, if binutils-multiarch is installed on your Linux system.
+
+ Another option is to create so called "standalone toolchain" tailored
+ for single specific platform including Android API level, and assign its
+ location to ANDROID_NDK_ROOT. In such case you have to pass matching
+ target name to Configure and shouldn't use -D__ANDROID_API__=N. PATH
+ adjustment becomes simpler, $ANDROID_NDK_ROOT/bin:$PATH suffices.
Running tests (on Linux)
------------------------
projects / openssl.git / blobdiff