[sr #111245] MSVC removes MAGIC_EXE when -Gw or -GL is specified

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URL:=0A  <https://savannah.gnu.org/support/?111245>=0A=0A                 S=
ummary: MSVC removes MAGIC_EXE when -Gw or -GL is specified=0A             =
      Group: GNU Libtool=0A               Submitter: None=0A               =
Submitted: Fri 23 May 2025 08:47:19 AM UTC=0A                Category: None=
=0A                Priority: 5 - Normal=0A                Severity: 3 - Nor=
mal=0A                  Status: None=0A                 Privacy: Public=0A =
            Assigned to: None=0A        Originator Email:=0A             Op=
en/Closed: Open=0A         Discussion Lock: Any=0A        Operating System:=
 Microsoft Windows=0A=0A=0A    ____________________________________________=
___________=0A=0AFollow-up Comments:=0A=0A=0A------------------------------=
-------------------------=0ADate: Fri 23 May 2025 08:47:19 AM UTC By: Anony=
mous=0AIn lt-main.in, MAGIC_EXE hold a magic string to distinguish it wheth=
er it is a=0Awrapper executable or not. It's ok on GCC because=0A__attribut=
e__((externally_visible)) was applied. However, in MSVC, it doesn't=0Ahave =
the similar attributes, then it would be eliminated by -Gw option (an=0Aopt=
ion like -fdata-sections).=0A=0AThere are two possible solutions came to my=
 mind.=0A=0A1. Use __pragma(comment(linker, "/INCLUDE:MAGIC_EXE"))=0A    It=
 places /INCLUDE:symbol_name option to linker, but please noticed that=0Ath=
e symbol name is _MAGIC_EXE instead of MAGIC_EXE in x86 (32-bit).=0A=0A2. U=
se (void) MAGIC_EXE in any function=0A    It mark MAGIC_EXE as used (even i=
n a strange way) prevent the effect of=0A-Gw. Yeah, I don't think it is a g=
ood way that MSVC doesn't change this=0Abehavior in future.=0A=0A3. Use ano=
ther strings to do so=0A    e.g. "libtool-wrapper" or "libtool wrapper (GNU=
 $PACKAGE) $VERSION". I=0Adon't think user will uses these strings in their=
 programs.=0A=0A=0A=0A=0A=0A=0A=0A    _____________________________________=
__________________=0A=0AReply to this item at:=0A=0A  <https://savannah.gnu=
.org/support/?111245>=0A=0A_______________________________________________=
=0AMessage sent via Savannah=0Ahttps://savannah.gnu.org/=0A
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