From 2d536724bf981fd9e811826b3de2a442ccb3cb07 Mon Sep 17 00:00:00 2001
From: Magne Sjaastad <magne.sjaastad@ceetronsolutions.com>
Date: Mon, 12 May 2025 07:57:37 +0200
Subject: [PATCH] Add custom search path for stdc++exp

On older Linux distributions, the `libstdc++exp.a` is not part of the package system. This requires a local build of this library. Add a configuration option `RESINSIGHT_GCC_STDCPP_EXP_PATH` to be able to link with this custom library.
---
 ApplicationLibCode/CMakeLists.txt | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/ApplicationLibCode/CMakeLists.txt b/ApplicationLibCode/CMakeLists.txt
index b91696f12b..a250850089 100644
--- a/ApplicationLibCode/CMakeLists.txt
+++ b/ApplicationLibCode/CMakeLists.txt
@@ -308,8 +308,28 @@ if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
   # https://github.com/OPM/ResInsight/pull/7
   list(APPEND EXTERNAL_LINK_LIBRARIES rt)
 
-  # stdc++exp is required for std::stacktrace
-  list(APPEND EXTERNAL_LINK_LIBRARIES stdc++exp)
+  # std::stacktrace requires stdc++exp. If a custom build of GCC stdc++exp is
+  # reqiured, define the search path here.
+  set(RESINSIGHT_GCC_STDCPP_EXP_PATH
+      ""
+      CACHE PATH "Path to search for stdc++exp"
+  )
+
+  if(RESINSIGHT_GCC_STDCPP_EXP_PATH)
+    find_library(
+      STDCPP_EXP_LIBRARY
+      NAMES stdc++exp
+      HINTS ${RESINSIGHT_GCC_STDCPP_EXP_PATH}
+    )
+    if(STDCPP_EXP_LIBRARY)
+      message(STATUS "stdc++exp library found at custom location: ${STDCPP_EXP_LIBRARY}")
+      list(APPEND EXTERNAL_LINK_LIBRARIES ${STDCPP_EXP_LIBRARY})
+    endif()
+  else()
+    # stdc++exp is required for std::stacktrace
+    message(STATUS "stdc++exp library found at default location")
+    list(APPEND EXTERNAL_LINK_LIBRARIES stdc++exp)
+  endif()
 endif()
 
 target_link_libraries(