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Enable support for building libgccjit

Browse Source 
libgccjit is still under development and, despite its name, may also be used for
ahead-of-time compilation.

Documentation can be found on the gcc website:
https://gcc.gnu.org/onlinedocs/jit/internals/index.html
https://gcc.gnu.org/wiki/JIT

With this change it's possible to enable the building of the libgccjit. It's
enabled as a language (with --enable-languages=jit) even if not a language
frontend at all.

The main changes are related to the requirement of having everything host side
built as Position Independent Code (PIC) with --enable-host-shared. GCC has the
needed logic for building its dependencies (mpc, gmp, mpfr, ...) correctly when
built "in-tree", which is not the case with crosstool-ng (see
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=05048fc29f0)

Signed-off-by: Marc Poulhiès <dkm@kataplop.net>
This commit is contained in:
Marc Poulhiès 2022-12-13 21:16:22 +01:00 committed by Chris Packham
parent 500fe13654
commit cdae8d0559
9 changed files with 59 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
config/cc.in
View File

@ -20,6 +20,9 @@ config CC_SUPPORT_ADA
config CC_SUPPORT_D
bool
config CC_SUPPORT_JIT
bool
config CC_SUPPORT_OBJC
bool
@ -53,6 +56,17 @@ config CC_LANG_FORTRAN
Only select this if you know that your specific version of the
compiler supports this language.
config CC_LANG_JIT
bool
prompt "JIT (EXPERIMENTAL)"
depends on CC_SUPPORT_JIT
depends on EXPERIMENTAL
help
Enable building the GCC JIT library.
Only select this if you know that your specific version of the
compiler supports the libgccjit.
if ! BARE_METAL
config CC_LANG_JAVA

1
config/cc/gcc.in
View File

@ -5,6 +5,7 @@
## select CC_SUPPORT_JAVA if !GCC_7_or_later && OBSOLETE
## select CC_SUPPORT_ADA
## select CC_SUPPORT_D
## select CC_SUPPORT_JIT
## select CC_SUPPORT_OBJC
## select CC_SUPPORT_OBJCXX
## select CC_SUPPORT_GOLANG

5
scripts/build/cc/gcc.sh
View File

@ -45,6 +45,7 @@ cc_gcc_lang_list() {
[ "${CT_CC_LANG_ADA}" = "y" ] && lang_list+=",ada"
[ "${CT_CC_LANG_D}" = "y" ] && lang_list+=",d"
[ "${CT_CC_LANG_JAVA}" = "y" ] && lang_list+=",java"
[ "${CT_CC_LANG_JIT}" = "y" ] && lang_list+=",jit"
[ "${CT_CC_LANG_OBJC}" = "y" ] && lang_list+=",objc"
[ "${CT_CC_LANG_OBJCXX}" = "y" ] && lang_list+=",obj-c++"
[ "${CT_CC_LANG_GOLANG}" = "y" ] && lang_list+=",go"
@ -343,6 +344,10 @@ do_gcc_core_backend() {
extra_config+=("--enable-newlib-nano-formatted-io")
fi
if [ "${CT_CC_LANG_JIT}" = "y" ]; then
extra_config+=("--enable-host-shared")
fi
if [ "${CT_CC_CXA_ATEXIT}" = "y" ]; then
extra_config+=("--enable-__cxa_atexit")
else

4
scripts/build/companion_libs/050-zlib.sh
View File

@ -80,6 +80,10 @@ do_zlib_backend() {
eval "${arg// /\\ }"
done
if [ "${CT_CC_LANG_JIT}" = "y" ]; then
cflags="${cflags} -fPIC"
fi
case "${host}" in
*-mingw32)
# zlib treats mingw host differently and requires using a different

6
scripts/build/companion_libs/100-gmp.sh
View File

@ -109,7 +109,7 @@ do_gmp_backend() {
CT_DoLog EXTRA "Configuring GMP"
# To avoind “illegal text-relocation” linking error against
# To avoid “illegal text-relocation” linking error against
# the static library, see:
# https://github.com/Homebrew/homebrew-core/pull/25470
case "${host}" in
@ -118,6 +118,10 @@ do_gmp_backend() {
;;
esac
if [ "${CT_CC_LANG_JIT}" = "y" ]; then
extra_config+=("--with-pic")
fi
# GMP's configure script doesn't respect the host parameter
# when not cross-compiling, ie when build == host so set
# CC_FOR_BUILD and CPP_FOR_BUILD.

14
scripts/build/companion_libs/110-mpfr.sh
View File

@ -94,6 +94,7 @@ do_mpfr_backend() {
local cflags
local ldflags
local arg
local -a extra_config
for arg in "$@"; do
eval "${arg// /\\ }"
@ -101,12 +102,16 @@ do_mpfr_backend() {
# Under Cygwin, we can't build a thread-safe library
case "${CT_HOST}" in
*cygwin*) mpfr_opts+=( --disable-thread-safe );;
*mingw*) mpfr_opts+=( --disable-thread-safe );;
*darwin*) mpfr_opts+=( --disable-thread-safe );;
*) mpfr_opts+=( --enable-thread-safe );;
*cygwin*) extra_config+=( --disable-thread-safe );;
*mingw*) extra_config+=( --disable-thread-safe );;
*darwin*) extra_config+=( --disable-thread-safe );;
*) extra_config+=( --enable-thread-safe );;
esac
if [ "${CT_CC_LANG_JIT}" = "y" ]; then
extra_config+=("--with-pic")
fi
CT_DoLog EXTRA "Configuring MPFR"
CT_DoExecLog CFG \
CC="${host}-gcc" \
@ -117,6 +122,7 @@ do_mpfr_backend() {
--build=${CT_BUILD} \
--host=${host} \
--prefix="${prefix}" \
"${extra_config[@]}" \
--with-gmp="${prefix}" \
--disable-shared \
--enable-static

4
scripts/build/companion_libs/121-isl.sh
View File

@ -82,6 +82,10 @@ do_isl_backend() {
eval "${arg// /\\ }"
done
if [ "${CT_CC_LANG_JIT}" = "y" ]; then
extra_config+=("--with-pic")
fi
CT_DoLog EXTRA "Configuring ISL"
CT_DoExecLog CFG \

4
scripts/build/companion_libs/130-cloog.sh
View File

@ -83,6 +83,10 @@ do_cloog_backend() {
cloog_opts+=( --with-isl=system --with-isl-prefix="${prefix}" )
cloog_opts+=( --without-osl )
if [ "${CT_CC_LANG_JIT}" = "y" ]; then
cloog_opts+=("--with-pic")
fi
CT_DoLog EXTRA "Configuring CLooG"
CT_DoExecLog CFG \

12
scripts/build/companion_libs/140-mpc.sh
View File

@ -38,6 +38,11 @@ do_mpc_for_build() {
mpc_opts+=( "prefix=${CT_BUILDTOOLS_PREFIX_DIR}" )
mpc_opts+=( "cflags=${CT_CFLAGS_FOR_BUILD}" )
mpc_opts+=( "ldflags=${CT_LDFLAGS_FOR_BUILD}" )
if [ "${CT_CC_LANG_JIT}" = "y" ]; then
mpc_opts+=("--with-pic")
fi
do_mpc_backend "${mpc_opts[@]}"
CT_Popd
@ -73,11 +78,17 @@ do_mpc_backend() {
local cflags
local ldflags
local arg
local -a extra_config
for arg in "$@"; do
eval "${arg// /\\ }"
done
if [ "${CT_CC_LANG_JIT}" = "y" ]; then
extra_config+=("--with-pic")
fi
CT_DoLog EXTRA "Configuring MPC"
CT_DoExecLog CFG \
@ -87,6 +98,7 @@ do_mpc_backend() {
"${CT_SRC_DIR}/mpc/configure" \
--build=${CT_BUILD} \
--host=${host} \
"${extra_config[@]}" \
--prefix="${prefix}" \
--with-gmp="${prefix}" \
--with-mpfr="${prefix}" \