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From: Iain D Sandoe <iains@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-10352] Darwin: Handle the fPIE option specially. Date: Fri, 19 Apr 2024 13:18:49 +0000 (GMT) [thread overview] Message-ID: <20240419131849.461853849AC5@sourceware.org> (raw) https://gcc.gnu.org/g:30766064e4f88bca3909ecd9737eeb5f4d36be81 commit r12-10352-g30766064e4f88bca3909ecd9737eeb5f4d36be81 Author: Iain Sandoe <iain@sandoe.co.uk> Date: Wed Oct 25 15:28:52 2023 +0100 Darwin: Handle the fPIE option specially. 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> (cherry picked from commit da9e72f80f3358bd9586e11aaf03341c1f867318) Diff: --- gcc/config/darwin.cc | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/gcc/config/darwin.cc b/gcc/config/darwin.cc index 129250a48fd..3cbdc97662d 100644 --- a/gcc/config/darwin.cc +++ b/gcc/config/darwin.cc @@ -3299,6 +3299,8 @@ 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) @@ -3469,8 +3471,17 @@ 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)
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