erl-xcomp-arm-android.conf

## -*-shell-script-*-
##
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##
## Copyright Ericsson AB 2009-2022. All Rights Reserved.
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## Licensed under the Apache License, Version 2.0 (the "License");
## you may not use this file except in compliance with the License.
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## Unless required by applicable law or agreed to in writing, software
## distributed under the License is distributed on an "AS IS" BASIS,
## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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## %CopyrightEnd%
##
## File: erl-xcomp-arm-android.conf
## Author: Dmitry Kolesnikov
##
## -----------------------------------------------------------------------------
## When cross compiling Erlang/OTP using `otp_build', copy this file and set
## the variables needed below. Then pass the path to the copy of this file as
## an argument to `otp_build' in the configure stage:
##   `otp_build configure --xcomp-conf=<FILE>'
## -----------------------------------------------------------------------------

## Note that you cannot define arbitrary variables in a cross compilation
## configuration file. Only the ones listed below will be guaranteed to be
## visible throughout the whole execution of all `configure' scripts. Other
## variables needs to be defined as arguments to `configure' or exported in
## the environment.

## -- Variables for `otp_build' Only -------------------------------------------

## Variables in this section are only used, when configuring Erlang/OTP for
## cross compilation using `$ERL_TOP/otp_build configure'.

## *NOTE*! These variables currently have *no* effect if you configure using
## the `configure' script directly.

# * `erl_xcomp_build' - The build system used. This value will be passed as
#   `--build=$erl_xcomp_build' argument to the `configure' script. It does
#   not have to be a full `CPU-VENDOR-OS' triplet, but can be. The full
#   `CPU-VENDOR-OS' triplet will be created by
#   `$ERL_TOP/make/autoconf/config.sub $erl_xcomp_build'. If set to `guess',
#   the build system will be guessed using
#   `$ERL_TOP/make/autoconf/config.guess'.
erl_xcomp_build=guess

# * `erl_xcomp_host' - Cross host/target system to build for. This value will
#   be passed as `--host=$erl_xcomp_host' argument to the `configure' script.
#   It does not have to be a full `CPU-VENDOR-OS' triplet, but can be. The
#   full `CPU-VENDOR-OS' triplet will be created by
#   `$ERL_TOP/make/autoconf/config.sub $erl_xcomp_host'.
erl_xcomp_host=arm-linux-androideabi

# * `erl_xcomp_configure_flags' - Extra configure flags to pass to the
#   `configure' script.
# Set --enable-builtin-zlib to avoid a inflateGetDictionary missing symbol
erl_xcomp_configure_flags="--without-termcap --without-wx \
                           --enable-builtin-zlib --enable-deterministic-build"


## -- Cross Compiler and Other Tools -------------------------------------------

##
##
#   Previously with older Android NDK versions before NDK r14, each Android
#   API level had a different set of headers, each in its own directory.
#NDK_SYSROOT=$NDK_ROOT/platforms/$NDK_PLAT/arch-arm
#   Starting with Android NDK r14, a single set of headers (called Unified
#   Headers) is provided in one location for every Android API level.
#NDK_SYSROOT=$NDK_ROOT/sysroot
#   Starting with Android NDK r19, the actual sysroot path is not needed
#   anymore as the NDK toolchain handles it implicitly.
#   For reference: https://github.com/android/ndk/issues/1407
#NDK_SYSROOT=$NDK_ROOT/toolchains/llvm/prebuilt/linux-x86_64/sysroot

## If the cross compilation tools are prefixed by `<HOST>-' you probably do
## not need to set these variables (where `<HOST>' is what has been passed as
## `--host=<HOST>' argument to `configure').

## All variables in this section can also be used when native compiling.

# * `CC' - C compiler.
#
#   For older Android NDK versions still supporting GCC.
#CC="arm-linux-androideabi-gcc --sysroot=$NDK_SYSROOT"
#   For more recent Android NDK versions only supporting Clang/LLVM.
#NDK_ABI_PLAT=androideabi16  # when targeting Android 4.1 Jelly Bean
CC="armv7a-linux-$NDK_ABI_PLAT-clang"

# * `CFLAGS' - C compiler flags.
CFLAGS="-g -O2 -march=armv7-a -mfloat-abi=softfp -mthumb"

# * `STATIC_CFLAGS' - Static C compiler flags.
#STATIC_CFLAGS=

# * `CFLAG_RUNTIME_LIBRARY_PATH' - This flag should set runtime library
#   search path for the shared libraries. Note that this actually is a
#   linker flag, but it needs to be passed via the compiler.
#CFLAG_RUNTIME_LIBRARY_PATH=

# * `CPP' - C pre-processor.
#
#   For older Android NDK versions still supporting GCC.
#CPP="arm-linux-androideabi-cpp --sysroot=$NDK_SYSROOT"
#   Not needed when using Clang/LLVM.
#CPP=

# * `CPPFLAGS' - C pre-processor flags.
#
#   For older Android NDK versions still supporting GCC.
#CPPFLAGS="-static -march=armv7-a -msoft-float -mthumb"
#   Not needed when using Clang/LLVM.
#CPPFLAGS=

# * `CXX' - C++ compiler.
#
#   For older Android NDK versions still supporting GCC.
#CXX="arm-linux-androideabi-c++ --sysroot=$NDK_SYSROOT
#   For more recent Android NDK versions only supporting Clang/LLVM.
CXX="armv7a-linux-$NDK_ABI_PLAT-clang++"

# * `CXXFLAGS' - C++ compiler flags.
CXXFLAGS="-march=armv7-a -mfloat-abi=softfp -mthumb"

# * `LD' - Linker.
#
#   Not needed when using GCC.
#LD=
#   For more recent Android NDK versions only supporting Clang/LLVM.
LD="arm-linux-androideabi-ld"

# * `LDFLAGS' - Linker flags.
LDFLAGS="-march=armv7-a -mfloat-abi=softfp -mthumb"

# * `LIBS' - Libraries.
#LIBS=

## -- *D*ynamic *E*rlang *D*river Linking --

## *NOTE*! Either set all or none of the `DED_LD*' variables.

# * `DED_LD' - Linker for Dynamically loaded Erlang Drivers.
#DED_LD=

# * `DED_LDFLAGS' - Linker flags to use with `DED_LD'.
#DED_LDFLAGS=

# * `DED_LD_FLAG_RUNTIME_LIBRARY_PATH' - This flag should set runtime library
#   search path for shared libraries when linking with `DED_LD'.
#DED_LD_FLAG_RUNTIME_LIBRARY_PATH=

## -- Large File Support --

## *NOTE*! Either set all or none of the `LFS_*' variables.

# * `LFS_CFLAGS' - Large file support C compiler flags.
#LFS_CFLAGS=

# * `LFS_LDFLAGS' - Large file support linker flags.
#LFS_LDFLAGS=

# * `LFS_LIBS' - Large file support libraries.
#LFS_LIBS=

## -- Other Tools --

# * `RANLIB' - `ranlib' archive index tool.
#RANLIB=

# * `AR' - `ar' archiving tool.
#AR=

# * `GETCONF' - `getconf' system configuration inspection tool. `getconf' is
#   currently used for finding out large file support flags to use, and
#   on Linux systems for finding out if we have an NPTL thread library or
#   not.
#GETCONF=

## -- Cross System Root Locations ----------------------------------------------

# * `erl_xcomp_sysroot' - The absolute path to the system root of the cross
#   compilation environment. Currently, the `crypto', `odbc', `ssh' and
#   `ssl' applications need the system root. These applications will be
#   skipped if the system root has not been set. The system root might be
#   needed for other things too. If this is the case and the system root
#   has not been set, `configure' will fail and request you to set it.
#
#   Previously for older Android NDK versions before NDK r19.
#erl_xcomp_sysroot="$NDK_SYSROOT"
#   Starting with Android NDK r19, this path does not matter anymore
#   as the NDK toolchain handles the sysroot directory implicitly.
#   Set a value anyway to enable all applications as described above.
erl_xcomp_sysroot=/sysroot/path/handled/by/the/Android/NDK


# * `erl_xcomp_isysroot' - The absolute path to the system root for includes
#   of the cross compilation environment. If not set, this value defaults
#   to `$erl_xcomp_sysroot', i.e., only set this value if the include system
#   root path is not the same as the system root path.
#erl_xcomp_isysroot=

## -- Optional Feature, and Bug Tests ------------------------------------------

## These tests cannot (always) be done automatically when cross compiling. You
## usually do not need to set these variables. Only set these if you really
## know what you are doing.

## Note that some of these values will override results of tests performed
## by `configure', and some will not be used until `configure' is sure that
## it cannot figure the result out.

## The `configure' script will issue a warning when a default value is used.
## When a variable has been set, no warning will be issued.

# * `erl_xcomp_after_morecore_hook' - `yes|no'. Defaults to `no'. If `yes',
#   the target system must have a working `__after_morecore_hook' that can be
#   used for tracking used `malloc()' implementations core memory usage.
#   This is currently only used by unsupported features.
#erl_xcomp_after_morecore_hook=

# * `erl_xcomp_bigendian' - `yes|no'. No default. If `yes', the target system
#   must be big endian. If `no', little endian. This can often be
#   automatically detected, but not always. If not automatically detected,
#   `configure' will fail unless this variable is set. Since no default
#   value is used, `configure' will try to figure this out automatically.
#erl_xcomp_bigendian=

# * `erl_xcomp_clock_gettime_cpu_time' - `yes|no'. Defaults to `no'. If `yes',
#   the target system must have a working `clock_gettime()' implementation
#   that can be used for retrieving process CPU time.
#erl_xcomp_clock_gettime_cpu_time=

# * `erl_xcomp_getaddrinfo' - `yes|no'. Defaults to `no'. If `yes', the target
#   system must have a working `getaddrinfo()' implementation that can
#   handle both IPv4 and IPv6.
#erl_xcomp_getaddrinfo=

# * `erl_xcomp_gethrvtime_procfs_ioctl' - `yes|no'. Defaults to `no'. If `yes',
#   the target system must have a working `gethrvtime()' implementation and
#   is used with procfs `ioctl()'.
#erl_xcomp_gethrvtime_procfs_ioctl=

# * `erl_xcomp_dlsym_brk_wrappers' - `yes|no'. Defaults to `no'. If `yes', the
#   target system must have a working `dlsym(RTLD_NEXT, <S>)' implementation
#   that can be used on `brk' and `sbrk' symbols used by the `malloc()'
#   implementation in use, and by this track the `malloc()' implementations
#   core memory usage. This is currently only used by unsupported features.
#erl_xcomp_dlsym_brk_wrappers=

# * `erl_xcomp_kqueue' - `yes|no'. Defaults to `no'. If `yes', the target
#   system must have a working `kqueue()' implementation that returns a file
#   descriptor which can be used by `poll()' and/or `select()'. If `no' and
#   the target system has not got `epoll()' or `/dev/poll', the kernel-poll
#   feature will be disabled.
#erl_xcomp_kqueue=

# * `erl_xcomp_linux_clock_gettime_correction' - `yes|no'. Defaults to `yes' on
#   Linux; otherwise, `no'. If `yes', `clock_gettime(CLOCK_MONOTONIC, _)' on
#   the target system must work. This variable is recommended to be set to
#   `no' on Linux systems with kernel versions less than 2.6.
#erl_xcomp_linux_clock_gettime_correction=

# * `erl_xcomp_linux_nptl' - `yes|no'. Defaults to `yes' on Linux; otherwise,
#   `no'. If `yes', the target system must have NPTL (Native POSIX Thread
#   Library). Older Linux systems have LinuxThreads instead of NPTL (Linux
#   kernel versions typically less than 2.6).
#erl_xcomp_linux_nptl=

# * `erl_xcomp_linux_usable_sigaltstack' - `yes|no'. Defaults to `yes' on Linux;
#   otherwise, `no'. If `yes', `sigaltstack()' must be usable on the target
#   system. `sigaltstack()' on Linux kernel versions less than 2.4 are
#   broken.
#erl_xcomp_linux_usable_sigaltstack=

# * `erl_xcomp_linux_usable_sigusrx' - `yes|no'. Defaults to `yes'. If `yes',
#   the `SIGUSR1' and `SIGUSR2' signals must be usable by the ERTS. Old
#   LinuxThreads thread libraries (Linux kernel versions typically less than
#   2.2) used these signals and made them unusable by the ERTS.
#erl_xcomp_linux_usable_sigusrx=

# * `erl_xcomp_poll' - `yes|no'. Defaults to `no' on Darwin/MacOSX; otherwise,
#   `yes'. If `yes', the target system must have a working `poll()'
#   implementation that also can handle devices. If `no', `select()' will be
#   used instead of `poll()'.
#erl_xcomp_poll=

# * `erl_xcomp_putenv_copy' - `yes|no'. Defaults to `no'. If `yes', the target
#   system must have a `putenv()' implementation that stores a copy of the
#   key/value pair.
#erl_xcomp_putenv_copy=

# * `erl_xcomp_reliable_fpe' - `yes|no'. Defaults to `no'. If `yes', the target
#   system must have reliable floating point exceptions.
#erl_xcomp_reliable_fpe=

## -----------------------------------------------------------------------------