debug: defend against renaming of panic using macros

CMakeLists.txt

@@ -32,6 +32,10 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 ###############################################################################
 add_library(cruft)
 
+# Preemptively define an identity panic macro so that TCL doens't fuck us over
+# by renaming a commonly used symbol.
+target_compile_definitions(cruft PUBLIC "-Dpanic=panic")
+
 
 ###############################################################################
 search_libs (BACKTRACE_LIB backtrace execinfo)

debug.hpp

@@ -422,6 +422,19 @@ void breakpoint (void);
 
 
 ///////////////////////////////////////////////////////////////////////////////
+// We define an identity macro for panic so that TCL and GCC don't decide to
+// fuck us over by redefine the symbol.
+//
+// Apparently this can't be taken care of via a '-Dpanic=panic' argument,
+// because it just ignores it for reasons I can't figure out.
+#ifdef panic
+#undef panic
+#endif
+
+#define panic panic
+
+
+//-----------------------------------------------------------------------------
 namespace cruft::debug::detail {
     void
     panic [[noreturn]] (const char *msg);
@@ -434,7 +447,7 @@ namespace cruft::debug::detail {
 }
 
 
-
+//-----------------------------------------------------------------------------
 constexpr void
 panic [[noreturn]] (const char *msg)
 {
@@ -444,6 +457,7 @@ panic [[noreturn]] (const char *msg)
 }
 
 
+//-----------------------------------------------------------------------------
 inline void
 panic [[noreturn]] (const std::string &msg)
 {