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Darwin: Handle the fPIE option specially.

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For Darwin, PIE requires PIC codegen, but otherwise is only a link-time
change. For almost all Darwin, we do not report __PIE__; the exception is
32bit X86 and from Darwin12 to 17 only (32 bit is no longer supported
after Darwin17).

gcc/ChangeLog:

	* config/darwin.cc (darwin_override_options): Handle fPIE.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
This commit is contained in:
Iain Sandoe 2023-10-25 15:28:52 +01:00
parent 8f62ce10bc
commit da9e72f80f
1 changed files with 13 additions and 2 deletions
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15
gcc/config/darwin.cc
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@ -3325,6 +3325,8 @@ darwin_override_options (void)
{
if (strverscmp (darwin_macosx_version_min, "10.14") >= 0)
generating_for_darwin_version = 18;
else if (strverscmp (darwin_macosx_version_min, "10.8") >= 0)
generating_for_darwin_version = 12;
else if (strverscmp (darwin_macosx_version_min, "10.7") >= 0)
generating_for_darwin_version = 11;
else if (strverscmp (darwin_macosx_version_min, "10.6") >= 0)
@ -3495,8 +3497,17 @@ darwin_override_options (void)
&& dwarf_debuginfo_p ())
flag_var_tracking_uninit = flag_var_tracking;
/* Final check on PCI options; for Darwin these are not dependent on the PIE
ones, although PIE does require PIC to support it. */
if (OPTION_SET_P (flag_pie) && flag_pie)
{
/* This is a little complicated, to match Xcode tools.
For Darwin, PIE requires PIC codegen, but otherwise is only a link-
time change. For almost all Darwin, we do not report __PIE__; the
exception is Darwin12-17 and for 32b only. */
flag_pie = generating_for_darwin_version >= 12 && !TARGET_64BIT ? 2 : 0;
flag_pic = 2; /* We always set this. */
}
/* Final check on PIC options. */
if (MACHO_DYNAMIC_NO_PIC_P)
{
if (flag_pic)