cross-arm-none-eabi-gcc: update to 9.2.0 + build libgcc

This does other reworking, such as building in a separate directory
like is recommended by the project.

By importing some changes from Arch, I managed to fix building of
libgcc, which further enables building the rest of the toolchain.

However, building libstdc++ is skipped, as that requires newlib
to build, which itself is not available at this point. Newlib on
the other hand requires a built toolchain to compile. We solve
this by building gcc (complete but without libstdc++) first,
followed by building newlib, followed by building just libstdc++
on its own.

srcpkgs/cross-arm-none-eabi-gcc/template

@@ -1,55 +1,13 @@
-# Template file for 'cross-${_triplet}-${_pkgname}'
+# Template file for 'cross-${_triplet}-gcc'
 _triplet=arm-none-eabi
 _pkgname=gcc
-pkgname=cross-${_triplet}-${_pkgname}
-version=9.1.0
+pkgname=cross-${_triplet}-gcc
+version=9.2.0
 revision=1
-wrksrc="${_pkgname}-${version}"
+wrksrc="gcc-${version}"
+build_wrksrc=build
 build_style=gnu-configure
-configure_args="
- --disable-decimal-float
- --disable-libffi
- --disable-libgomp
- --disable-libmudflap
- --disable-libquadmath
- --disable-libssp
- --disable-libstdcxx-pch
- --disable-nls
- --disable-shared
- --disable-threads
- --disable-tls
- --disable-werror
- --enable-__cxa_atexit
- --enable-c99
- --enable-gnu-indirect-function
- --enable-interwork
- --enable-languages=c,c++
- --enable-long-long
- --enable-multilib
- --enable-plugins
- --host=${XBPS_CROSS_TRIPLET}
- --libdir=/usr/lib
- --libexecdir=/usr/lib
- --prefix=/usr
- --target=${_triplet}
- --with-gmp
- --with-gnu-as
- --with-gnu-ld
- --with-headers=/usr/${_triplet}/include
- --with-host-libstdcxx='-static-libgcc'
- --with-isl
- --with-libelf
- --with-mpc
- --with-mpfr
- --with-multilib-list=rmprofile
- --with-native-system-header-dir=/include
- --with-newlib
- --with-python-dir=share/${_pkgname}-${_triplet}
- --with-sysroot=/usr/${_triplet}
- --with-system-zlib
-"
-make_build_target="all-gcc"
-make_install_target="install-gcc"
+make_build_args="INHIBIT_LIBC_CFLAGS='-DUSE_TM_CLONE_REGISTRY=0'"
 hostmakedepends="autoconf automake cross-arm-none-eabi-binutils bison flex perl"
 makedepends="gmp-devel isl15-devel libmpc-devel mpfr-devel zlib-devel"
 depends="cross-arm-none-eabi-binutils"
@@ -57,12 +15,72 @@ short_desc="GNU Compiler Collection"
 maintainer="Ivan Sokolov <ivan-p-sokolov@ya.ru>"
 license="GFDL-1.2-or-later, GPL-3.0-or-later, LGPL-2.1-or-later"
 homepage="https://gcc.gnu.org"
-distfiles="${GNU_SITE}/${_pkgname}/${_pkgname}-${version}/${_pkgname}-${version}.tar.xz"
-checksum=79a66834e96a6050d8fe78db2c3b32fb285b230b855d0a66288235bc04b327a0
+distfiles="${GNU_SITE}/gcc/gcc-${version}/gcc-${version}.tar.xz"
+checksum=ea6ef08f121239da5695f76c9b33637a118dcf63e24164422231917fa61fb206
 alternatives="arm-none-eabi:/usr/bin/arm-none-eabi-cc:/usr/bin/arm-none-eabi-gcc"
 nocross=yes
 nopie=yes
+nostrip_files="libgcc.a libgcov.a"
+
+post_extract() {
+	mkdir -p build
+}
+
+pre_configure() {
+	export CFLAGS_FOR_TARGET="-g -Os -ffunction-sections -fdata-sections"
+	export CXXFLAGS_FOR_TARGET="-g -Os -ffunction-sections -fdata-sections"
+}
+
+do_configure() {
+	../configure \
+		--disable-decimal-float \
+		--disable-libffi \
+		--disable-libgomp \
+		--disable-libmudflap \
+		--disable-libquadmath \
+		--disable-libssp \
+		--disable-libstdcxx-pch \
+		--disable-libstdc__-v3 \
+		--disable-nls \
+		--disable-shared \
+		--disable-threads \
+		--disable-tls \
+		--disable-werror \
+		--enable-__cxa_atexit \
+		--enable-c99 \
+		--enable-gnu-indirect-function \
+		--enable-interwork \
+		--enable-languages=c,c++ \
+		--enable-long-long \
+		--enable-multilib \
+		--enable-plugins \
+		--host=${XBPS_CROSS_TRIPLET} \
+		--libdir=/usr/lib \
+		--libexecdir=/usr/lib \
+		--prefix=/usr \
+		--target=${_triplet} \
+		--with-gmp \
+		--with-gnu-as \
+		--with-gnu-ld \
+		--with-headers=/usr/${_triplet}/include \
+		--with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' \
+		--with-isl \
+		--with-libelf \
+		--with-mpc \
+		--with-mpfr \
+		--with-multilib-list=rmprofile \
+		--with-native-system-header-dir=/include \
+		--with-newlib \
+		--with-python-dir=share/gcc-${_triplet} \
+		--with-sysroot=/usr/${_triplet} \
+		--with-system-zlib
+}
+
+pre_build() {
+	pre_configure
+}
 
 post_install() {
 	rm -fr ${DESTDIR}/usr/share/{info,man/man7}
+	rm -fr ${DESTDIR}/usr/lib/libcc1.*
 }