termux-packages/scripts/build/termux_step_setup_toolchain.sh

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termux_step_setup_toolchain() {
export CFLAGS=""
export LDFLAGS="-L${TERMUX_PREFIX}/lib"
export AS=$TERMUX_HOST_PLATFORM-clang
export CC=$TERMUX_HOST_PLATFORM-clang
export CXX=$TERMUX_HOST_PLATFORM-clang++
export AR=$TERMUX_HOST_PLATFORM-ar
export CPP=$TERMUX_HOST_PLATFORM-cpp
export LD=$TERMUX_HOST_PLATFORM-ld
export OBJCOPY=$TERMUX_HOST_PLATFORM-objcopy
export OBJDUMP=$TERMUX_HOST_PLATFORM-objdump
export RANLIB=$TERMUX_HOST_PLATFORM-ranlib
export READELF=$TERMUX_HOST_PLATFORM-readelf
export STRIP=$TERMUX_HOST_PLATFORM-strip
if [ "$TERMUX_ON_DEVICE_BUILD" = "false" ]; then
export PATH=$TERMUX_STANDALONE_TOOLCHAIN/bin:$PATH
export CC_FOR_BUILD=gcc
export PKG_CONFIG=$TERMUX_STANDALONE_TOOLCHAIN/bin/${TERMUX_HOST_PLATFORM}-pkg-config
export CCTERMUX_HOST_PLATFORM=$TERMUX_HOST_PLATFORM$TERMUX_PKG_API_LEVEL
if [ $TERMUX_ARCH = arm ]; then
CCTERMUX_HOST_PLATFORM=armv7a-linux-androideabi$TERMUX_PKG_API_LEVEL
fi
else
export CC_FOR_BUILD=$CC
# Some build scripts use environment variable 'PKG_CONFIG', so
# using this for on-device builds too.
export PKG_CONFIG=pkg-config
fi
if [ "$TERMUX_ARCH" = "arm" ]; then
# https://developer.android.com/ndk/guides/standalone_toolchain.html#abi_compatibility:
# "We recommend using the -mthumb compiler flag to force the generation of 16-bit Thumb-2 instructions".
# With r13 of the ndk ruby 2.4.0 segfaults when built on arm with clang without -mthumb.
CFLAGS+=" -march=armv7-a -mfpu=neon -mfloat-abi=softfp -mthumb"
LDFLAGS+=" -march=armv7-a"
elif [ "$TERMUX_ARCH" = "i686" ]; then
# From $NDK/docs/CPU-ARCH-ABIS.html:
CFLAGS+=" -march=i686 -msse3 -mstackrealign -mfpmath=sse"
elif [ "$TERMUX_ARCH" = "aarch64" ]; then
:
elif [ "$TERMUX_ARCH" = "x86_64" ]; then
:
else
termux_error_exit "Invalid arch '$TERMUX_ARCH' - support arches are 'arm', 'i686', 'aarch64', 'x86_64'"
fi
# Android 7 started to support DT_RUNPATH (but not DT_RPATH).
LDFLAGS+=" -Wl,-rpath=$TERMUX_PREFIX/lib,--enable-new-dtags"
# Avoid linking extra (unneeded) libraries.
LDFLAGS+=" -Wl,--as-needed"
# Basic hardening.
CFLAGS+=" -fstack-protector-strong"
LDFLAGS+=" -Wl,-z,relro,-z,now"
if [ "$TERMUX_DEBUG" = "true" ]; then
CFLAGS+=" -g3 -O1 -D_FORTIFY_SOURCE=2"
else
CFLAGS+=" -Oz"
fi
export CXXFLAGS="$CFLAGS"
export CPPFLAGS="-I${TERMUX_PREFIX}/include"
# If libandroid-support is declared as a dependency, link to it explicitly:
if [ "$TERMUX_PKG_DEPENDS" != "${TERMUX_PKG_DEPENDS/libandroid-support/}" ]; then
LDFLAGS+=" -landroid-support"
fi
export ac_cv_func_getpwent=no
export ac_cv_func_getpwnam=no
export ac_cv_func_getpwuid=no
export ac_cv_func_sigsetmask=no
export ac_cv_c_bigendian=no
if [ "$TERMUX_ON_DEVICE_BUILD" = "false" ] && [ ! -d $TERMUX_STANDALONE_TOOLCHAIN ]; then
# Do not put toolchain in place until we are done with setup, to avoid having a half setup
# toolchain left in place if something goes wrong (or process is just aborted):
local _TERMUX_TOOLCHAIN_TMPDIR=${TERMUX_STANDALONE_TOOLCHAIN}-tmp
rm -Rf $_TERMUX_TOOLCHAIN_TMPDIR
local _NDK_ARCHNAME=$TERMUX_ARCH
if [ "$TERMUX_ARCH" = "aarch64" ]; then
_NDK_ARCHNAME=arm64
elif [ "$TERMUX_ARCH" = "i686" ]; then
_NDK_ARCHNAME=x86
fi
cp $NDK/toolchains/llvm/prebuilt/linux-x86_64 $_TERMUX_TOOLCHAIN_TMPDIR -r
# Remove android-support header wrapping not needed on android-21:
rm -Rf $_TERMUX_TOOLCHAIN_TMPDIR/sysroot/usr/local
# Use gold by default to work around https://github.com/android-ndk/ndk/issues/148
cp $_TERMUX_TOOLCHAIN_TMPDIR/bin/aarch64-linux-android-ld.gold \
$_TERMUX_TOOLCHAIN_TMPDIR/bin/aarch64-linux-android-ld
cp $_TERMUX_TOOLCHAIN_TMPDIR/aarch64-linux-android/bin/ld.gold \
$_TERMUX_TOOLCHAIN_TMPDIR/aarch64-linux-android/bin/ld
# Linker wrapper script to add '--exclude-libs libgcc.a', see
# https://github.com/android-ndk/ndk/issues/379
# https://android-review.googlesource.com/#/c/389852/
local linker
for linker in ld ld.bfd ld.gold; do
local wrap_linker=$_TERMUX_TOOLCHAIN_TMPDIR/arm-linux-androideabi/bin/$linker
local real_linker=$_TERMUX_TOOLCHAIN_TMPDIR/arm-linux-androideabi/bin/$linker.real
cp $wrap_linker $real_linker
echo '#!/bin/bash' > $wrap_linker
echo -n '$(dirname $0)/' >> $wrap_linker
echo -n $linker.real >> $wrap_linker
echo ' --exclude-libs libunwind.a --exclude-libs libgcc_real.a "$@"' >> $wrap_linker
done
for HOST_PLAT in aarch64-linux-android armv7a-linux-androideabi i686-linux-android x86_64-linux-android; do
# Setup the cpp preprocessor:
cp $_TERMUX_TOOLCHAIN_TMPDIR/bin/$HOST_PLAT$TERMUX_PKG_API_LEVEL-clang \
$_TERMUX_TOOLCHAIN_TMPDIR/bin/$HOST_PLAT-clang
cp $_TERMUX_TOOLCHAIN_TMPDIR/bin/$HOST_PLAT$TERMUX_PKG_API_LEVEL-clang++ \
$_TERMUX_TOOLCHAIN_TMPDIR/bin/$HOST_PLAT-clang++
cp $_TERMUX_TOOLCHAIN_TMPDIR/bin/$HOST_PLAT$TERMUX_PKG_API_LEVEL-clang \
$_TERMUX_TOOLCHAIN_TMPDIR/bin/$HOST_PLAT-cpp
sed -i 's/clang/clang -E/' \
$_TERMUX_TOOLCHAIN_TMPDIR/bin/$HOST_PLAT-cpp
cp $_TERMUX_TOOLCHAIN_TMPDIR/bin/$HOST_PLAT-clang \
$_TERMUX_TOOLCHAIN_TMPDIR/bin/$HOST_PLAT-gcc
cp $_TERMUX_TOOLCHAIN_TMPDIR/bin/$HOST_PLAT-clang++ \
$_TERMUX_TOOLCHAIN_TMPDIR/bin/$HOST_PLAT-gcc
done
cp $_TERMUX_TOOLCHAIN_TMPDIR/bin/armv7a-linux-androideabi$TERMUX_PKG_API_LEVEL-clang \
$_TERMUX_TOOLCHAIN_TMPDIR/bin/arm-linux-androideabi-clang
cp $_TERMUX_TOOLCHAIN_TMPDIR/bin/armv7a-linux-androideabi$TERMUX_PKG_API_LEVEL-clang++ \
$_TERMUX_TOOLCHAIN_TMPDIR/bin/arm-linux-androideabi-clang++
cp $_TERMUX_TOOLCHAIN_TMPDIR/bin/armv7a-linux-androideabi-cpp \
$_TERMUX_TOOLCHAIN_TMPDIR/bin/arm-linux-androideabi-cpp
cd $_TERMUX_TOOLCHAIN_TMPDIR/sysroot
for f in $TERMUX_SCRIPTDIR/ndk-patches/*.patch; do
sed "s%\@TERMUX_PREFIX\@%${TERMUX_PREFIX}%g" "$f" | \
sed "s%\@TERMUX_HOME\@%${TERMUX_ANDROID_HOME}%g" | \
patch --silent -p1;
done
# ifaddrs.h: Added in android-24 unified headers, use a inline implementation for now.
# libintl.h: Inline implementation gettext functions.
# langinfo.h: Inline implementation of nl_langinfo().
cp "$TERMUX_SCRIPTDIR"/ndk-patches/{ifaddrs.h,libintl.h,langinfo.h} usr/include
# Remove <sys/capability.h> because it is provided by libcap.
# Remove <sys/shm.h> from the NDK in favour of that from the libandroid-shmem.
# Remove <sys/sem.h> as it doesn't work for non-root.
# Remove <glob.h> as we currently provide it from libandroid-glob.
# Remove <iconv.h> as it's provided by libiconv.
# Remove <spawn.h> as it's only for future (later than android-27).
# Remove <zlib.h> and <zconf.h> as we build our own zlib
rm usr/include/sys/{capability.h,shm.h,sem.h} usr/include/{glob.h,iconv.h,spawn.h,zlib.h,zconf.h}
sed -i "s/define __ANDROID_API__ __ANDROID_API_FUTURE__/define __ANDROID_API__ $TERMUX_PKG_API_LEVEL/" \
usr/include/android/api-level.h
$TERMUX_ELF_CLEANER usr/lib/*/*/*.so
grep -lrw $_TERMUX_TOOLCHAIN_TMPDIR/sysroot/usr/include/c++/v1 -e '<version>' | xargs -n 1 sed -i 's/<version>/\"version\"/g'
mv $_TERMUX_TOOLCHAIN_TMPDIR $TERMUX_STANDALONE_TOOLCHAIN
fi
# On Android 7, libutil functionality is provided by libc.
# But many programs still may search for libutil.
if [ ! -f $TERMUX_PREFIX/lib/libutil.so ]; then
mkdir -p "$TERMUX_PREFIX/lib"
echo 'INPUT(-lc)' > $TERMUX_PREFIX/lib/libutil.so
fi
export PKG_CONFIG_LIBDIR="$TERMUX_PKG_CONFIG_LIBDIR"
if [ "$TERMUX_ON_DEVICE_BUILD" = "false" ]; then
# Create a pkg-config wrapper. We use path to host pkg-config to
# avoid picking up a cross-compiled pkg-config later on.
local _HOST_PKGCONFIG
_HOST_PKGCONFIG=$(which pkg-config)
mkdir -p $TERMUX_STANDALONE_TOOLCHAIN/bin "$PKG_CONFIG_LIBDIR"
cat > "$PKG_CONFIG" <<-HERE
#!/bin/sh
export PKG_CONFIG_DIR=
export PKG_CONFIG_LIBDIR=$PKG_CONFIG_LIBDIR
exec $_HOST_PKGCONFIG "\$@"
HERE
chmod +x "$PKG_CONFIG"
fi
}