[Bug target/114034] New: Failure of tests gcov-dump-{1,2}.C

["fxcoudert at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114034

            Bug ID: 114034
           Summary: Failure of tests gcov-dump-{1,2}.C
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fxcoudert at gcc dot gnu.org
  Target Milestone: ---

We have the following failures on x86_64-apple-darwin23:

FAIL: g++.dg/gcov/gcov-dump-1.C  -std=gnu++98 (test for excess errors)
FAIL: g++.dg/gcov/gcov-dump-1.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/gcov/gcov-dump-1.C  -std=gnu++17 (test for excess errors)
FAIL: g++.dg/gcov/gcov-dump-1.C  -std=gnu++20 (test for excess errors)
FAIL: g++.dg/gcov/gcov-dump-2.C  -std=gnu++98 (test for excess errors)
FAIL: g++.dg/gcov/gcov-dump-2.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/gcov/gcov-dump-2.C  -std=gnu++17 (test for excess errors)
FAIL: g++.dg/gcov/gcov-dump-2.C  -std=gnu++20 (test for excess errors)

Excess errors:
ld: warning: ignoring duplicate libraries: '-lgcov'

The compilation line only includes one -lgcov:

/Users/fx/ibin-20240219/gcc/testsuite/g++1/../../xg++
-B/Users/fx/ibin-20240219/gcc/testsuite/g++1/../../ 
/Users/fx/gcc-upstream/gcc/testsuite/g++.dg/gcov/gcov-dump-1.C   
-fdiagnostics-plain-output  -nostdinc++
-I/Users/fx/ibin-20240219/x86_64-apple-darwin23/libstdc++-v3/include/x86_64-apple-darwin23
-I/Users/fx/ibin-20240219/x86_64-apple-darwin23/libstdc++-v3/include
-I/Users/fx/gcc-upstream/libstdc++-v3/libsupc++
-I/Users/fx/gcc-upstream/libstdc++-v3/include/backward
-I/Users/fx/gcc-upstream/libstdc++-v3/testsuite/util -fmessage-length=0 
-std=gnu++98 -fprofile-generate -ftest-coverage -lgcov   
-L/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libstdc++-v3/src/.libs 
-B/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libstdc++-v3/src/.libs 
-L/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libstdc++-v3/src/.libs 
-L/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libstdc++-v3/src/experimental/.libs
-B/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libitm/
-L/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libitm/.libs -lm  -o
./gcov-dump-1.exe

but the driver somehow includes another one when calling collect2:

/Users/fx/ibin-20240219/gcc/testsuite/g++1/../../collect2 -demangle -syslibroot
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/ -dynamic -arch x86_64
-platform_version macos 14.0.0 0.0 -o ./gcov-dump-1.exe
-L/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libstdc++-v3/src/.libs
-L/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libstdc++-v3/src/.libs
-L/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libstdc++-v3/src/experimental/.libs
-L/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libitm/.libs
-L/Users/fx/ibin-20240219/gcc/testsuite/g++1/../..
-L/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libstdc++-v3/src/.libs
-L/Users/fx/ibin-20240219/x86_64-apple-darwin23/./libitm -lemutls_w -lheapt_w
/var/folders/_8/7ft0tbns6_l87s21n4s_1sc80000gn/T//ccyOpfRM.o -lgcov -lstdc++
-lgcov -lgcc_s.1.1 -lgcc -lSystem -no_compact_unwind -rpath @loader_path -rpath
/Users/fx/ibin-20240219/gcc -rpath
/Users/fx/ibin-20240219/x86_64-apple-darwin23/libstdc++-v3/src/.libs -rpath
/Users/fx/ibin-20240219/x86_64-apple-darwin23/libitm


I'm wondering if it's a good idea to simply ignore the warning in the two test
cases. It's not such a frequent use case, and darwin linker to being a pain
here.