Merge branch 'ps/no-writable-strings'

Building with "-Werror -Wwrite-strings" is now supported.

* ps/no-writable-strings: (27 commits)
  config.mak.dev: enable `-Wwrite-strings` warning
  builtin/merge: always store allocated strings in `pull_twohead`
  builtin/rebase: always store allocated string in `options.strategy`
  builtin/rebase: do not assign default backend to non-constant field
  imap-send: fix leaking memory in `imap_server_conf`
  imap-send: drop global `imap_server_conf` variable
  mailmap: always store allocated strings in mailmap blob
  revision: always store allocated strings in output encoding
  remote-curl: avoid assigning string constant to non-const variable
  send-pack: always allocate receive status
  parse-options: cast long name for OPTION_ALIAS
  http: do not assign string constant to non-const field
  compat/win32: fix const-correctness with string constants
  pretty: add casts for decoration option pointers
  object-file: make `buf` parameter of `index_mem()` a constant
  object-file: mark cached object buffers as const
  ident: add casts for fallback name and GECOS
  entry: refactor how we remove items for delayed checkouts
  line-log: always allocate the output prefix
  line-log: stop assigning string constant to file parent buffer
  ...

1 files changed, 3 insertions, 3 deletions

diff --git a/diffcore-rename.c b/diffcore-rename.c
index 5a6e2bcac7..0e1adb87df 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -406,7 +406,7 @@ static const char *get_highest_rename_path(struct strintmap *counts)
 	return highest_destination_dir;
 }
 
-static char *UNKNOWN_DIR = "/";  /* placeholder -- short, illegal directory */
+static const char *UNKNOWN_DIR = "/";  /* placeholder -- short, illegal directory */
 
 static int dir_rename_already_determinable(struct strintmap *counts)
 {
@@ -429,8 +429,8 @@ static int dir_rename_already_determinable(struct strintmap *counts)
 }
 
 static void increment_count(struct dir_rename_info *info,
-			    char *old_dir,
-			    char *new_dir)
+			    const char *old_dir,
+			    const char *new_dir)
 {
 	struct strintmap *counts;
 	struct strmap_entry *e;