Set gtest to static to fix:

[ 95%] Linking CXX executable ../../bin/ImageTests
/usr/bin/ld: ../../lib/libgtest_main.so.1.11.0: undefined reference to `std::ios_base_library_init()@GLIBCXX_3.4.32'
collect2: error: ld returned 1 exit status
make[2]:  [Testing/ImageTests/CMakeFiles/ImageTests.dir/build.make:500: bin/ImageTests] Error 1
make[1]:  [CMakeFiles/Makefile2:1273: Testing/ImageTests/CMakeFiles/ImageTests.dir/all] Error 2

The problem is that there is libstdc++ from conda and from the system and they don't have the same versioned symbols.

Author: akenmorris

Testing/CMakeLists.txt

@@ -1,6 +1,9 @@
 # GTest setup
 #find_package(GTest REQUIRED)
 
+set(BUILD_SHARED_LIBS_SAVED ${BUILD_SHARED_LIBS})
+set(BUILD_SHARED_LIBS OFF)
+
 # fetch googletest
 include(FetchContent)
 FetchContent_Declare(
@@ -14,6 +17,10 @@ if(NOT googletest_POPULATED)
   add_subdirectory(${googletest_SOURCE_DIR} ${googletest_BINARY_DIR})
 endif()
 
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+
+# Restore BUILD_SHARED_LIBS
+set(BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS_SAVED})
 
 # NOTE: must call enable_testing() before this in the top-level CMakeLists.txt