[clang] [flang][driver] Don't use -whole-archive on Darwin (PR #75393)

[Andrzej Warzyński via cfe-commits]

https://github.com/banach-space created https://github.com/llvm/llvm-project/pull/75393

Direct follow-up of #7312 - the linker on Darwin does not support
`-whole-archive`, so that needs to be removed from the linker
invocation.

For context:
  * https://github.com/llvm/llvm-project/pull/7312


>From 954ebbb19c7e0fa126cf55f34d8437a89a84010e Mon Sep 17 00:00:00 2001
From: Andrzej Warzynski <andrzej.warzynski at arm.com>
Date: Wed, 13 Dec 2023 22:05:07 +0000
Subject: [PATCH] [flang][driver] Don't use -whole-archive on Darwin

Direct follow-up of #7312 - the linker on Darwin does not support
`-whole-archive`, so that needs to be removed from the linker
invocation.

For context:
  * https://github.com/llvm/llvm-project/pull/7312
---
 clang/lib/Driver/ToolChains/CommonArgs.cpp | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index 51b336216c5653..4ce456d52c3e5e 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -1128,20 +1128,24 @@ void tools::addFortranRuntimeLibs(const ToolChain &TC, const ArgList &Args,
     // --whole-archive flag to the link line.  If it's not, add a proper
     // --whole-archive/--no-whole-archive bracket to the link line.
     bool WholeArchiveActive = false;
-    for (auto *Arg : Args.filtered(options::OPT_Wl_COMMA))
-      if (Arg)
+    for (auto *Arg : Args.filtered(options::OPT_Wl_COMMA)) {
+      if (Arg) {
         for (StringRef ArgValue : Arg->getValues()) {
           if (ArgValue == "--whole-archive")
             WholeArchiveActive = true;
           if (ArgValue == "--no-whole-archive")
             WholeArchiveActive = false;
         }
+      }
+    }
 
-    if (!WholeArchiveActive)
+    if (!WholeArchiveActive && !TC.getTriple().isMacOSX()) {
       CmdArgs.push_back("--whole-archive");
-    CmdArgs.push_back("-lFortran_main");
-    if (!WholeArchiveActive)
+      CmdArgs.push_back("-lFortran_main");
       CmdArgs.push_back("--no-whole-archive");
+    } else {
+      CmdArgs.push_back("-lFortran_main");
+    }
 
     // Perform regular linkage of the remaining runtime libraries.
     CmdArgs.push_back("-lFortranRuntime");