build: set hash-style to gnu via gcc default

Builds use a mix of styles for the hash table in the ELF header. Only
one style of table is necessary, and the GNU one is more performant
for lookups. Eliminating the SysV style hash table trims ~450kb. This
is done via setting the default linker in gcc instead of LDFLAGS as
some packages ignore LDFLAGS.

Note that if MIPS is ever added as a supported architecture, it
does not support hash-style=gnu at this time.

Signed-off-by: Ian Leonard <antonlacon@gmail.com>

config/optimize

@@ -1,4 +1,5 @@
 GCC_OPTIM="-Os"
+# Linker hash-style is set to gnu via gcc default
 LD_OPTIM="-Wl,--as-needed"
 
 if [ "${BUILD_WITH_DEBUG}" = "yes" ]; then

packages/lang/gcc/package.mk

@@ -41,6 +41,7 @@ GCC_COMMON_CONFIGURE_OPTS="--target=$TARGET_NAME \
                            --enable-lto \
                            --enable-gold \
                            --enable-ld=default \
+                           --with-linker-hash-style=gnu \
                            --disable-multilib \
                            --disable-nls \
                            --enable-checking=release \