[PATCH 1/1] makefiles: Handle absolute path in create_dir() due to --with-wine64=(absolute path).

[Jinoh Kang]

From: Jinoh Kang

Since commit 7620f21ff98 (makefiles: Generate the wow64 symlinks from
makedep., 2025-02-18), makedep generates a symlink target for
"<wine64_dir>/loader-wow64".  This causes <wine64-dir> to be added as an
"ignore path," ultimately leading to create_file_directories() and then
create_dir().

create_dir() only expects relative paths.  If it's passed an absolute
path, it will recognize the "/" prefix as an empty path component
followed by slash, and will attempt to mkdir(""), which fails.

Fix this by skipping initial slashes in create_dir().

Fixes: 7620f21ff98a85249b0b110bcba9953b32763f28
---
 tools/makedep.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/makedep.c b/tools/makedep.c
index 6930472f8dc..a64c979620f 100644
--- a/tools/makedep.c
+++ b/tools/makedep.c
@@ -2007,12 +2007,13 @@ static void create_dir( const char *dir )
     char *p, *path;

p = path = xstrdup( dir );
-    while ((p = strchr( p, '/' )))
+    for (;;)
     {
+        while (*p == '/') p++;
+        if (!(p = strchr( p, '/' ))) break;
         *p = 0;
         if (mkdir( path, 0755 ) == -1 && errno != EEXIST) fatal_perror( "mkdir %s", path );
         *p++ = '/';
-        while (*p == '/') p++;
     }
     if (mkdir( path, 0755 ) == -1 && errno != EEXIST) fatal_perror( "mkdir %s", path );
     free( path );