From e8a3d363f4db70a4ee55c8fb15e88650d00084ad Mon Sep 17 00:00:00 2001
From: Efraim Flashner <efraim@flashner.co.il>
Date: Mon, 9 Jun 2025 10:08:00 +0300
Subject: [PATCH] gnu: cppdap: Link with libatomic.

* gnu/packages/debug.scm (cppdap)[arguments]: Remove configure-flag
linking the executable with libatomic when building for riscv64-linux.
Add a phase to link with libatomic.

Change-Id: I16c899d921967caafa159d11d30d6c81a6d67729
---
 gnu/packages/debug.scm | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/gnu/packages/debug.scm b/gnu/packages/debug.scm
index d558cbd503e..d454bceb409 100644
--- a/gnu/packages/debug.scm
+++ b/gnu/packages/debug.scm
@@ -220,10 +220,20 @@ tools that process C/C++ code.")
          ;; Only one of the following three can be enabled at the same time
          ;; "-DCPPDAP_USE_EXTERNAL_RAPIDJSON_PACKAGE=ON"
          ;; "-DCPPDAP_USE_EXTERNAL_JSONCPP_PACKAGE=ON"
-         "-DCPPDAP_USE_EXTERNAL_NLOHMANN_JSON_PACKAGE=ON"
-         #$@(if (target-riscv64?)
-                '("-DCMAKE_EXE_LINKER_FLAGS=-latomic")
-                '()))))
+         "-DCPPDAP_USE_EXTERNAL_NLOHMANN_JSON_PACKAGE=ON")
+      #:phases
+      (if (target-riscv64?)
+          #~(modify-phases %standard-phases
+              ;; We need to unconditionally link with libatomic on some
+              ;; architectures to successfully build cmake.
+              (add-after 'unpack 'link-with-libatomic
+                (lambda _
+                  (substitute* "CMakeLists.txt"
+                    (("cppdap_set_target_options\\(cppdap\\)" all)
+                     (string-append
+                       all "\n\n"
+                       "target_link_libraries(cppdap PRIVATE atomic)"))))))
+          #~%standard-phases)))
     (native-inputs
      (list googletest))
     ;; see lib/cmake/cppdap/cppdapConfig.cmake