busybox: Compile with crc32 for kernel. GCC: Use right arguments based on host.

core/busybox/checksums

@@ -1,2 +1,2 @@
 3d1d04a4dbd34048f4794815a5c48ebb9eb53c5277e09ffffc060323b95dfbdc  busybox-1.30.1.tar.bz2
-32b5172f1bc896e9934d15936fc013892ec0260349380b4325077d0351509330  .config
+df3b3f0319daee88fc0dabff32ae57b0b62184ac67b2845adb64505bb9eafd0d  .config

core/busybox/files/.config

@@ -154,6 +154,7 @@ CONFIG_LZMA=y
 CONFIG_UNXZ=y
 CONFIG_XZCAT=y
 CONFIG_XZ=y
+CONFIG_CRC32=y
 CONFIG_BZIP2=y
 CONFIG_BZIP2_SMALL=8
 CONFIG_FEATURE_BZIP2_DECOMPRESS=y

core/gcc/build

@@ -5,6 +5,7 @@ mkdir -p gcc-build
 cd gcc-build
 
 export libat_cv_have_ifunc=no
+machine=$(gcc -dumpmachine)
 
 ../gcc/configure \
     --prefix=/usr \
@@ -27,7 +28,10 @@ export libat_cv_have_ifunc=no
     --enable-shared \
     --enable-threads \
     --enable-tls \
-    --enable-languages=c,c++
+    --enable-languages=c,c++ \
+    --build="$machine" \
+    --target="$machine" \
+    --host="$machine"
 
 make BOOT_CFLAGS='-O'
 make DESTDIR="$1" install