[PATCH] Respect -fprofile-prefix-map for getcwd in .gcno files

[Fangrui Song]

so that
`gcc -c a.cc --coverage -fprofile-prefix-map=$PWD=.`
does not emit $PWD in the generated a.gcno file.

        PR gcov-profile/96092
---
 gcc/coverage.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/coverage.cc b/gcc/coverage.cc
index 1ed55fed547..c6e9aced6fe 100644
--- a/gcc/coverage.cc
+++ b/gcc/coverage.cc
@@ -1341,7 +1341,7 @@ coverage_init (const char *filename)
          gcov_write_unsigned (bbg_file_stamp);
          /* Use an arbitrary checksum */
          gcov_write_unsigned (0);
-         gcov_write_string (getpwd ());
+         gcov_write_string (remap_profile_filename (getpwd ()));
 
          /* Do not support has_unexecuted_blocks for Ada.  */
          gcov_write_unsigned (strcmp (lang_hooks.name, "GNU Ada") != 0);
-- 
2.47.1