[ipxe-devel] Unable to Make iPXE on Mac OSX 10.8.3

[Robin Smidsrød]

I think this is related to the license Makefile changes done
during/after the hackathon i July. Maybe a needed modification was not
performed on those files below. Look at those commits and see if you can
make sense of it.

-- Robin

On 19.08.2013 08:43, Richard D. Hornbaker wrote:
> Team,
> 
> Any takers here?
> 
> 
> [BUILD] bin/__divdi3.o
> cc1: error in backend: Global variable 'obj___divdi3' has an invalid
> section specifier '.provided': mach-o section specifier requires a
> segment and section separated by a comma
> make: *** [bin/__divdi3.o] Error 1
> 
> This seems to be an issue with the section directive in
> src/include/compiler.h.  The only suspicious thing is that the section
> appears to be referenced differently for assembly vs. non-assembly modules:
> #define PROVIDE_SYMBOL( _sym )                          \
>         *.section ".provided", "a", @nobits ;*
> 
> But seems to define this for non-assembly modules:
> #define PROVIDE_SYMBOL( _sym )                          \
>           __attribute__ (( *section ( ".provided" )* ))
> 
> The format of the __attribute__ statement seems to be missing the
> section name that the original error is compaining about.  Toying with
> the contents of this statement yielded different errors but no real
> progress (e.g., 'section ( ".provided,a" )'.
> 
> 
> Any ideas?  I'm really out of my depth to troubleshoot this, but it
> smells close.
> 
> 
>     -------- Original Message --------
>     Subject: Unable to Make iPXE on Mac OSX 10.8.3
>     From: "Richard D. Hornbaker" <Richard at Hornbaker.com
>     <mailto:Richard at Hornbaker.com>>
>     Date: Thu, July 25, 2013 10:51 pm
>     To: "iPXE Developers" <ipxe-devel at lists.ipxe.org
>     <mailto:ipxe-devel at lists.ipxe.org>>
> 
>     All,
> 
>     Redirecting from http://forum.ipxe.org/showthread.php?tid=6979 at
>     Robin's suggestion...
> 
>     I'm trying to build this package on Mac OS 10.8.3 (command-line
>     tools from Xcode 4.6.3), but getting an error during the make
>     process. I've only found one hit on the forums, but no resolution -
>     I've got the same issue:
>     http://forum.ipxe.org/showthread.php?tid=4559
> 
>     $ make
>     FATAL:/usr/bin/../libexec/as/x86_64/as: I don't understand '-' flag!
>     [...]
>     [DEPS] libgcc/__divdi3.c
>     FATAL:/usr/bin/../libexec/as/x86_64/as: I don't understand '-' flag!
>     [...]
>     FATAL:/usr/bin/../libexec/as/x86_64/as: I don't understand '-' flag!
>     [BUILD] bin/__divdi3.o
>     In file included from <command-line>:0:
>     ./include/compiler.h:196:1: error: "__weak" redefined
>     <built-in>: error: this is the location of the previous definition
>     make: *** [bin/__divdi3.o] Error 1
> 
> 
>     I managed to narrow down the error to this shell call in
>     Makefile.housekeeping:
>     OLDGAS := $(shell $(AS) --version | grep -q '2\.9\.1' && $(ECHO)
>     -DGAS291)
> 
>     In this context, it looks like the "fatal" console error is probably
>     cosmetic, and due to --version flag not being supported by 'as'.
>      The real hangup was this hard error:
>     ./include/compiler.h:196:1: error: "__weak" redefined
> 
>     I searched for "__weak" and only got a hit in compiler.h for its
>     definition.  I first tried making it conditional, then tried
>     commenting it out, both with the same result (apparently it's being
>     pre-defined somewhere outside of ipxe's source).  That
>     pre-definition may in itself be a conflict, but getting past that
>     error just revealed the next layer of the onion:
> 
>     [BUILD] bin/__divdi3.o
>     cc1: error in backend: Global variable 'obj___divdi3' has an invalid
>     section specifier '.provided': mach-o section specifier requires a
>     segment and section separated by a comma.
>     make: *** [bin/__divdi3.o] Error 1
> 
>     At Robin's suggestion, I tried make NO_WERROR=1 with the same result.
> 
> 
>     I'm happy to be a test mule here to get this debugged.  Caveat: I'm
>     a hack programmer, so a bit out of my element here; patience please. ;-)
> 
>     It seems to me that a few things need to be fixed:
>     * Add some intelligence around the 'as' check to skip it on certain
>     platforms like Xcode
>     * Figure out what's up with the pre-definition of __weak, and if
>     that's an issue
>     * Linker error for .provided
> 
>     Thanks,
>     Richard
> 
> 
> 
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