Fix CI: add _POSIX_C_SOURCE for fileno, remove duplicate link

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: deftio

tools/CMakeLists.txt

@@ -10,7 +10,7 @@ add_executable(generate_fixtures generate_fixtures.c)
 target_link_libraries(generate_fixtures PRIVATE triepack_core)
 
 add_executable(trp trp_inspect.c)
-target_link_libraries(trp PRIVATE triepack_core triepack_json)
+target_link_libraries(trp PRIVATE triepack_json)
 install(TARGETS trp DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 # Custom target to generate test fixtures

tools/trp_inspect.c

@@ -20,6 +20,12 @@
  * BSD-2-Clause -- see LICENSE.txt
  */
 
+/* Expose POSIX isatty/fileno under strict C99 (must precede all includes) */
+#ifndef _WIN32
+#define _POSIX_C_SOURCE 200809L
+#include <unistd.h>
+#endif
+
 #include "triepack/triepack.h"
 #include "triepack/triepack_json.h"
 
@@ -32,8 +38,6 @@
 #include <io.h>
 #define isatty _isatty
 #define fileno _fileno
-#else
-#include <unistd.h>
 #endif
 
 /* ── ANSI colour helpers ─────────────────────────────────────────────── */