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#!/bin/sh -e
# Make sure gmp is built with generic options.
cp gcc/gmp/configfsf.guess gcc/gmp/config.guess
cp gcc/gmp/configfsf.sub gcc/gmp/config.sub
# Use lib not lib64 by default.
sed -i '/m64=/s/lib64/lib/' gcc/gcc/config/i386/t-linux64
sed -i 's/lib64/lib/' gcc/gcc/config/i386/linux64.h
# Build must happen outside of gcc source.
mkdir -p gcc-build
cd gcc-build
export libat_cv_have_ifunc=no
../gcc/configure \
--prefix=/usr \
--disable-multilib \
--disable-symvers \
--disable-libmpx \
--disable-libmudflap \
--disable-libsanitizer \
--disable-werror \
--disable-fixed-point \
--disable-libstdcxx-pch \
--disable-nls \
--without-included-gettext \
--enable-checking=release \
--mandir=/usr/share/man \
--infodir=/usr/share/info \
--with-system-zlib \
--enable-__cxa_atexit \
--enable-default-pie \
--enable-default-ssp \
--enable-shared \
--enable-threads \
--enable-tls \
--enable-languages=c,c++ \
--build=x86_64-pc-linux-musl \
--disable-bootstrap
make
make DESTDIR="$1" install
# Save 35MB.
find "$1" -name libgtkpeer.a -delete
find "$1" -name libgjsmalsa.a -delete
find "$1" -name libgij.a -delete
# Some legacy programs will expect cc
ln -s gcc "$1/usr/bin/cc"
# POSIX compliance.
install -Dm755 ../c99 "$1/usr/bin/c99"
# Symlink for LTO.
{
mkdir -p "$1/usr/lib/bfd-plugins"
ln -s /usr/libexec/gcc/x86_64-pc-linux-musl/9.2.0/liblto_plugin.so \
"$1/usr/lib/bfd-plugins/liblto_plugin.so"
}
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