For example, rx-elf...
gcc/function.c: In function 'thread_prologue_and_epilogue_insns':
gcc/regs.h:322:34: error: array subscript is above array bounds
[-Werror=array-bounds]
function.c has this:
if (pic_offset_table_rtx)
add_to_hard_reg_set (&set_up_by_prologue, Pmode,
PIC_OFFSET_TABLE_REGNUM);
Which ends up here:
static inline unsigned int
end_hard_regno (enum machine_mode mode, unsigned int regno)
{
return regno + hard_regno_nregs[regno][(int) mode];
}
but if PIC_OFFSET_TABLE_REGNUM isn't defined by the target, you get:
#ifndef PIC_OFFSET_TABLE_REGNUM
#define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
#endif
which is ~0 and *always* out of range.
Does this warrant another excpetion to -Werror in Makefile.in ? Or is
there another way to get past this these days?
Index: Makefile.in
===================================================================
--- Makefile.in (revision 180992)
+++ Makefile.in (working copy)
@@ -195,12 +195,14 @@ GCC_WARN_CXXFLAGS = $(LOOSE_WARN) $($(@D
# flex output may yield harmless "no previous prototype" warnings
build/gengtype-lex.o-warn = -Wno-error
gengtype-lex.o-warn = -Wno-error
# mips-tfile.c contains -Wcast-qual warnings.
mips-tfile.o-warn = -Wno-error
expmed.o-warn = -Wno-error
+# non-PIC targets always get an array-bounds error in
thread_prologue_and_epilogue_insns
+function.o-warn = -Wno-error
# All warnings have to be shut off in stage1 if the compiler used then
# isn't gcc; configure determines that. WARN_CFLAGS will be either
# $(GCC_WARN_CFLAGS), or nothing. Similarly, WARN_CXXFLAGS will be
# either $(GCC_WARN_CXXFLAGS), or nothing.
WARN_CFLAGS = @warn_cflags@
