I'm trying to port flac 1.2.1 to OS X (I'm taking over maintainership
of the Fink package), and I'm running into some problems with
bitreader_asm.nasm. After adding the following to nasm.h:
+%elifdef OBJ_FORMAT_macho
+ %define FLAC__PUBLIC_NEEDS_UNDERSCORE
+ %idefine code_section section .text
+ %idefine data_section section .data
+ %idefine bss_section section .bss
I can get it compiling, but when it tries to link the libFLAC dylib,
it complains:
ld: warning codegen in
FLAC__bitreader_read_rice_signed_block_asm_ia32_bswap.c1_loop (offset
0x0000003A) prevents image from loading in dyld shared cache
ld: warning codegen in
FLAC__bitreader_read_rice_signed_block_asm_ia32_bswap.c1_next2 (offset
0x00000012) prevents image from loading in dyld shared cache
ld: warning codegen in
FLAC__bitreader_read_rice_signed_block_asm_ia32_bswap.c2_next4 (offset
0x00000015) prevents image from loading in dyld shared cache
ld: absolute addressing (perhaps -mdynamic-no-pic) used in
FLAC__bitreader_read_rice_signed_block_asm_ia32_bswap.c1_loop
from .libs/libFLAC.lax/libFLAC-asm.a/bitreader_asm.o not allowed in
slidable image
Mach-O shared libraries must be relocatable (-mdynamic-no-pic is a GCC
flag for Darwin that makes it generate code where only the external
references are relocatable, that's why the error message mentions that.)
I don't really know assembly, but based on <http://www.zathras.de/angelweb/blog-intel-assembler-on-mac-os-x.htm
>, I tried the following fix:
In c1_loop:
%ifdef FLAC__PUBLIC_NEEDS_UNDERSCORE
+%ifdef OBJ_FORMAT_macho
+ call .epilog
+.myAnchorPoint:
+ lea edi, [ebx + .myAnchorPoint + _FLAC__crc16_table]
+%else
mov edi, _FLAC__crc16_table
+%endif
%else
mov edi, FLAC__crc16_table
%endif
And then right before the end of the entire function:
ret
+%ifdef OBJ_FORMAT_macho+;; Needed for Mach-O PIC
+.epilog:
+ mov ebx, [esp]
+ ret
+%endif
+
end
That wasn't very helpful:
bitreader_asm.nasm:144: error: beroset-p-650-invalid effective address
bitreader_asm.nasm:577: warning: label alone on a line without a colon
might be in error
Does anyone have any other suggestions?
Thanks,
Matthew
--
Matthew Sachs <[EMAIL PROTECTED]>
FreeNode IRC: msachs
http://zevils.com/
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