toolchain/gcc: enable zstd support

LTO object files will now be compressed using zstd.

Compressing debug sections with zstd will have to wait for GCC 13,
which adds support for -gz=zstd.

NOTE: wiping the ccache is strongly recommended, not doing so might
yield build error later on:
"lto1: internal compiler error: original not compressed with zstd"

Signed-off-by: Andre Heider <a.heider@gmail.com>

diff --git a/toolchain/gcc/common.mk b/toolchain/gcc/common.mk
index e885141538c0e7478d2209c010e3d2a07f4c873c..25f7e1ef7029be3ca53e72383607c8eb19f7a33f 100644 (file)
--- a/toolchain/gcc/common.mk
+++ b/toolchain/gcc/common.mk
@@ -66,6 +66,9 @@ TAR_OPTIONS += \
        --exclude-from='$(CURDIR)/../exclude-testsuite' --exclude=gcc/ada/*.ad* \
        --exclude=libjava
 
+# this needs to be without -L/-lzstd flags or other parts fail to build
+# use an absolute path to ensure it really picks up our version
+export ac_cv_search_ZSTD_compress=$(STAGING_DIR_HOST)/lib/libzstd.a -pthread
 export libgcc_cv_fixed_point=no
 ifdef CONFIG_INSTALL_GCCGO
   export libgo_cv_c_split_stack_supported=no
@@ -103,7 +106,7 @@ GCC_CONFIGURE:= \
                $(if $(CONFIG_arc),--with-cpu=$(CONFIG_CPU_TYPE)) \
                $(if $(CONFIG_powerpc64), $(if $(CONFIG_USE_MUSL),--with-abi=elfv2)) \
                --with-system-zlib=$(STAGING_DIR_HOST) \
-               --without-zstd \
+               --with-zstd=$(STAGING_DIR_HOST) \
                --with-gmp=$(STAGING_DIR_HOST) \
                --with-mpfr=$(STAGING_DIR_HOST) \
                --with-mpc=$(STAGING_DIR_HOST) \