[Driver] do not link _p libs for -pg on FreeBSD 14 and later

In FreeBSD 14 the project will deprecate the _p special profiling
libraries.

Support for -pg (i.e., mcount) still exists but libraries compiled
with -pg will not be built by default, so stop linking against them.

Reviewed by:	Dimitry Andric
Sponsored by:   The FreeBSD Foundation
Differential Revision:  https://reviews.llvm.org/D104753

clang/lib/Driver/ToolChains/FreeBSD.cpp

@@ -293,6 +293,8 @@ void freebsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   addLinkerCompressDebugSectionsOption(ToolChain, Args, CmdArgs);
   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
 
+  bool Profiling = Args.hasArg(options::OPT_pg) &&
+                   ToolChain.getTriple().getOSMajorVersion() < 14;
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
     // Use the static OpenMP runtime with -static-openmp
     bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) &&
@@ -302,7 +304,7 @@ void freebsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
     if (D.CCCIsCXX()) {
       if (ToolChain.ShouldLinkCXXStdlib(Args))
         ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
-      if (Args.hasArg(options::OPT_pg))
+      if (Profiling)
         CmdArgs.push_back("-lm_p");
       else
         CmdArgs.push_back("-lm");
@@ -313,13 +315,13 @@ void freebsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
       linkXRayRuntimeDeps(ToolChain, CmdArgs);
     // FIXME: For some reason GCC passes -lgcc and -lgcc_s before adding
     // the default system libraries. Just mimic this for now.
-    if (Args.hasArg(options::OPT_pg))
+    if (Profiling)
       CmdArgs.push_back("-lgcc_p");
     else
       CmdArgs.push_back("-lgcc");
     if (Args.hasArg(options::OPT_static)) {
       CmdArgs.push_back("-lgcc_eh");
-    } else if (Args.hasArg(options::OPT_pg)) {
+    } else if (Profiling) {
       CmdArgs.push_back("-lgcc_eh_p");
     } else {
       CmdArgs.push_back("--as-needed");
@@ -328,13 +330,13 @@ void freebsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
     }
 
     if (Args.hasArg(options::OPT_pthread)) {
-      if (Args.hasArg(options::OPT_pg))
+      if (Profiling)
         CmdArgs.push_back("-lpthread_p");
       else
         CmdArgs.push_back("-lpthread");
     }
 
-    if (Args.hasArg(options::OPT_pg)) {
+    if (Profiling) {
       if (Args.hasArg(options::OPT_shared))
         CmdArgs.push_back("-lc");
       else
@@ -347,7 +349,7 @@ void freebsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
 
     if (Args.hasArg(options::OPT_static)) {
       CmdArgs.push_back("-lgcc_eh");
-    } else if (Args.hasArg(options::OPT_pg)) {
+    } else if (Profiling) {
       CmdArgs.push_back("-lgcc_eh_p");
     } else {
       CmdArgs.push_back("--as-needed");
@@ -416,7 +418,8 @@ void FreeBSD::addLibStdCxxIncludePaths(
 void FreeBSD::AddCXXStdlibLibArgs(const ArgList &Args,
                                   ArgStringList &CmdArgs) const {
   CXXStdlibType Type = GetCXXStdlibType(Args);
-  bool Profiling = Args.hasArg(options::OPT_pg);
+  bool Profiling =
+      Args.hasArg(options::OPT_pg) && getTriple().getOSMajorVersion() < 14;
 
   switch (Type) {
   case ToolChain::CST_Libcxx:

clang/test/Driver/freebsd.cpp

@@ -5,9 +5,12 @@
 // CHECK-TEN: "-lc++" "-lm"
 // CHECK-NINE: "-lstdc++" "-lm"
 
+// RUN: %clangxx %s -### -pg -o %t.o -target amd64-unknown-freebsd40.0 -stdlib=platform 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-PG-FOURTEEN %s
 // RUN: %clangxx %s -### -pg -o %t.o -target amd64-unknown-freebsd10.0 -stdlib=platform 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-PG-TEN %s
 // RUN: %clangxx %s -### -pg -o %t.o -target amd64-unknown-freebsd9.2 -stdlib=platform 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-PG-NINE %s
+// CHECK-PG-FOURTEEN: "-lc++" "-lm"
 // CHECK-PG-TEN: "-lc++_p" "-lm_p"
 // CHECK-PG-NINE: "-lstdc++_p" "-lm_p"