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optionrom: fix compilation with mingw docker target

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Two fixes are needed.  First, mingw does not have -D_FORTIFY_SOURCE,
hence --enable-debug disables optimization.  This is not acceptable
for ROMs, which should override CFLAGS to force inclusion of -O2.

Second, PE stores global constructors and destructors using the
following linker script snippet:

     ___CTOR_LIST__ = .; __CTOR_LIST__ = . ;
			LONG (-1);*(.ctors); *(.ctor); *(SORT(.ctors.*));  LONG (0);
     ___DTOR_LIST__ = .; __DTOR_LIST__ = . ;
			LONG (-1); *(.dtors); *(.dtor); *(SORT(.dtors.*));  LONG (0);

The LONG directives cause the .img files to be 16 bytes too large;
the recently added check to signrom.py catches this.  To fix this,
replace -T and -e options with a linker script.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-08-09 22:50:40 +02:00
parent b0e8f5cadc
commit 9d4cd7b4ed
2 changed files with 15 additions and 1 deletions
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6
pc-bios/optionrom/flat.lds Normal file
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@ -0,0 +1,6 @@
SECTIONS
{
. = 0;
.text : { *(.text) *(.text.$) }
}
ENTRY(_start)