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authorShinya Kuribayashi <shinya.kuribayashi@necel.com>2007-10-21 21:30:42 +0900
committerShinya Kuribayashi <skuribay@ruby.dti.ne.jp>2007-10-21 21:30:42 +0900
commit00101dd7a32d12f698150123e47e4b3420279f86 (patch)
tree32b365935919b0725281f031f1dc6c51850cf113 /mips_config.mk
parenteb700636db017d310edaeb559b13d82588560674 (diff)
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[MIPS] Add PIC-related switches to PLATFORM_{CPP,LD}FLAGS and cleanup
Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Diffstat (limited to 'mips_config.mk')
-rw-r--r--mips_config.mk25
1 files changed, 25 insertions, 0 deletions
diff --git a/mips_config.mk b/mips_config.mk
index d8aa5fa..67fb67d 100644
--- a/mips_config.mk
+++ b/mips_config.mk
@@ -22,3 +22,28 @@
#
PLATFORM_CPPFLAGS += -DCONFIG_MIPS -D__MIPS__
+
+#
+# From Linux arch/mips/Makefile
+#
+# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
+# code since it only slows down the whole thing. At some point we might make
+# use of global pointer optimizations but their use of $28 conflicts with
+# the current pointer optimization.
+#
+# The DECStation requires an ECOFF kernel for remote booting, other MIPS
+# machines may also. Since BFD is incredibly buggy with respect to
+# crossformat linking we rely on the elf2ecoff tool for format conversion.
+#
+# cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
+# cflags-y += -msoft-float
+# LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
+# MODFLAGS += -mlong-calls
+#
+
+#
+# Meanwhile, U-Boot rely on PIC. We add proper switches explicitly.
+#
+PLATFORM_CPPFLAGS += -G 0 -mabicalls -fpic -pipe
+PLATFORM_CPPFLAGS += -msoft-float
+PLATFORM_LDFLAGS += -G 0 -static -n -nostdlib