guix/gnu/packages/patches/clasp-hide-event-ids.patch
Liliana Marie Prikler 3ed077e92c
gnu: clasp: Prevent ID clashes in dependent packages.
Clasp uses an interesting CRTP pattern to insert statically (i.e. compile-time)
generated numeric IDs into global fields.  However, these templates are
instantiated once per shared library---thus, whenever a library is linked, new
IDs are generated, and the original intent (safely type-casting objects across
libraries) is lost.  To help the linker out, we make sure that these IDs are
only instantiated in clasp and not when building other libraries.

* gnu/packages/patches/clasp-hide-event-ids.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it here.
* gnu/packages/clasp.scm (source)[patches]: Add it here.
(clingo)[#:phases]: Drop ‘skip-failing-tests’.
(python-clorm)[#:phases]<fix-breaking-tests>: Adjust accordingly.
(python-clintest): Drop arguments.
2024-07-07 08:04:47 +02:00

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From a4c4e4f3c410834c3e56f644841f5bcbb084225c Mon Sep 17 00:00:00 2001
From: Liliana Marie Prikler <liliana.prikler@ist.tugraz.at>
Date: Fri, 28 Jun 2024 11:15:16 +0200
Subject: [PATCH] clasp: Hide Event_t<T>::id_s.
This patch helps build clingo with non-local clasp while keeping the
event system working as intended.
---
clasp/util/misc_types.h | 2 ++
src/CMakeLists.txt | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/clasp/util/misc_types.h b/clasp/util/misc_types.h
index 3677873..09c2075 100644
--- a/clasp/util/misc_types.h
+++ b/clasp/util/misc_types.h
@@ -432,7 +432,9 @@ struct Event_t : Event {
Event_t(Subsystem sys, Verbosity verb) : Event(sys, id_s, verb) {}
static const uint32 id_s;
};
+#if _BUILDING_CLASP_
template <class T> const uint32 Event_t<T>::id_s = Event::nextId();
+#endif
template <class ToType, class EvType> const ToType* event_cast(const EvType& ev) { return ev.id == ToType::id_s ? static_cast<const ToType*>(&ev) : 0; }
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 8439d12..4f55990 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -123,6 +123,7 @@ source_group("${ide_header}\\mt" FILES ${header_mt})
endif()
add_library(libclasp ${header} ${header_util} ${header_cli} ${header_mt} ${src})
+target_compile_definitions(libclasp PRIVATE _BUILDING_CLASP_)
if (CLASP_BUILD_WITH_THREADS)
target_link_libraries(libclasp PUBLIC Threads::Threads)
target_compile_options(libclasp PRIVATE
--
2.45.1