Hi binutils people!
ld (from binutils 2.16) on mipsel doesn't warn about
undefined symbols with elf32-little and binary output
formats (and possibly others).
When the output format is elf32-tradlittlemips, undefined
symbols are reported as expected.
I have created a small test case, wich I attach. You'll only
need to adjust your mipsel paths in the Makefile.
To see the undefined symbols in a statically linked ELF
binary, take a look at boot.bin after issuing make.
For the impatient, here goes the output from my mipsel nm:
/usr/local/mipsel/bin/mipsel-linux-gnu-nm boot.bin
U deadbeef
U _gp_disp
U __muldf3
00000000 T start
00000020 T test
My project needs to use both binary and elf32-little
targets, so it is essential for me to know what is going on.
Note: I use cross-compiled mipsel binutils and gcc. My
system is i386.
Best regards,
Jakub
MIPS_BINUTILS_DIR=/usr/local/mipsel/bin
MIPS_TARGET=mipsel-linux-gnu
CC=$(MIPS_BINUTILS_DIR)/$(MIPS_TARGET)-gcc
LD=$(MIPS_BINUTILS_DIR)/$(MIPS_TARGET)-ld
ASFLAGS=-mips2
LFLAGS=-e start -T _link.ld
.S.o:
$(CC) $(ASFLAGS) -c -o $@ $<
.c.o:
$(CC) -msoft-float -c -o $@ $<
boot.bin: boot.o test.o
$(LD) $(LFLAGS) boot.o test.o -o $@
clean:
-rm *.o *.bin
OUTPUT_FORMAT(elf32-little)
/*OUTPUT_FORMAT(binary)*/
SECTIONS {
.image 0x0: AT (0) {
*(.text);
*(.reginfo);
}
}
.text
.global start
start:
jal test
nop
j start
nop
extern double test(void);
double test(void)
{
double e, pi;
e = 2.7;
pi = 3.14;
deadbeef();
return e*pi;
}
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