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Index > Unix > How to build current FASM on MacOS?
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TmX



Joined: 02 Mar 2006
Posts: 826
Location: Jakarta, Indonesia
TmX
I used fasm-1.73.27.tar.gz as starting point.

First, built objconv found at here
Then grab FASM.

Convert the object file:
Code:
./objconv -fmacho -nu fasm.o fasm.obj


Quote:
Input file: fasm.o, output file: fasm.obj
Converting from ELF32 to Mach-O Little Endian32
Adding leading underscores to symbol names

0 Debug sections removed
0 Exception sections removed
14 Changes in leading underscores on symbol names


Last part: link with gcc
Code:
gcc fasm.obj -o fasm


I got this:
Quote:

ld: warning: ignoring file fasm.obj, building for macOS-x86_64 but attempting to link with file built for unknown-i386
Undefined symbols for architecture x86_64:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)


For those who are not familiar with MacOS:
Quote:
starting with macOS Catalina, 32-bit apps are no longer compatible with macOS

https://support.apple.com/en-us/HT208436


Any help?
Post 21 Feb 2021, 13:39
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 18068
Location: In your JS exploiting you and your system
revolution
You can make a 64-bit compatible binary here:
https://board.flatassembler.net/topic.php?t=19593
Post 21 Feb 2021, 15:18
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Tomasz Grysztar



Joined: 16 Jun 2003
Posts: 7888
Location: Kraków, Poland
Tomasz Grysztar
If you start with fasmg (which comes with a 64-bit Mach-O executable in the official package), you might be able to use its Mach-O formatter and make fasm.x64 in Mach-O format instead of ELF (similarly to what jacobly did for fasmg).
Post 21 Feb 2021, 16:10
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