parisc: add CONFIG_MLONGCALLS option to enable linkage of huge vmlinux executables
When building a 64bit kernel which includes all necessary drivers and
filesystems the vmlinux kernel often gets so huge, that the linker won't
be able to resolve the branch stubs. This patch overcomes this limit by
providing an option to compile the kernel with the -mlong-calls compiler
option.
Signed-off-by: Helge Deller <deller@gmx.de>
diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 87f64d6..ed9a14c 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -64,6 +64,10 @@
cflags-y += -ffunction-sections
endif
+# Use long jumps instead of long branches (needed if your linker fails to
+# link a too big vmlinux executable)
+cflags-$(CONFIG_MLONGCALLS) += -mlong-calls
+
# select which processor to optimise for
cflags-$(CONFIG_PA7100) += -march=1.1 -mschedule=7100
cflags-$(CONFIG_PA7200) += -march=1.1 -mschedule=7200