Error handling

Tests for caosdb-cpplib!3 (merged)

test/CMakeLists.txt

@@ -27,11 +27,39 @@ set(test_cases
     test_ccaosdb
     )
 
+
+include(CheckCXXCompilerFlag)
+include(CheckCCompilerFlag)
+
+function(add_compiler_flag flag)
+    string(FIND "${CMAKE_CXX_FLAGS}" "${flag}" cxx_present)
+    if(cxx_present EQUAL -1)
+        check_cxx_compiler_flag("${flag}" flag_supported)
+        if(flag_supported)
+            set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" PARENT_SCOPE)
+        endif()
+        unset(flag_supported CACHE)
+    endif()
+    unset(cxx_present CACHE)
+endfunction()
+
+### but ignore these
+add_compiler_flag("-Wno-unused-parameter")
+add_compiler_flag("-Wno-unused-result")
+add_compiler_flag("-g")
+
 #######################################################
 ### Linting with clang-tidy and include-what-you-use
 #######################################################
 option(LINTING "clang-tidy and iwye" ON)
 if(LINTING)
+    ### set paranoid compiler flags
+    #add_compiler_flag("-Wall")
+    #add_compiler_flag("-Wextra")
+    #add_compiler_flag("-pedantic")
+    #add_compiler_flag("-Werror")
+
+
     find_program(iwyu
         NAMES include-what-you-use iwyu
         PATHS ${CMAKE_SOURCE_DIR}/tools/include-what-you-use/${iwyu_os}/bin)
@@ -54,7 +82,7 @@ if(LINTING)
             "--warnings-as-errors=*"
             "--fix")
         set(_CMAKE_CXX_CLANG_TIDY_CHECKS
-          "--checks=*,-fuchsia-*,-llvm-include-order,-llvmlibc-*,-cert-err58-cpp,-cppcoreguidelines-avoid-non-const-global-variables,-cppcoreguidelines-owning-memory,-modernize-use-trailing-return-type,-google-readability-avoid-underscore-in-googletest-name,-cppcoreguidelines-avoid-magic-numbers,-readability-magic-numbers,-cppcoreguidelines-avoid-goto,-hicpp-avoid-goto")
+          "--checks=*,-fuchsia-*,-llvmlibc-*,-cert-err58-cpp,-cppcoreguidelines-avoid-non-const-global-variables,-cppcoreguidelines-owning-memory,-modernize-use-trailing-return-type,-google-readability-avoid-underscore-in-googletest-name,-cppcoreguidelines-avoid-magic-numbers,-readability-magic-numbers,-cppcoreguidelines-avoid-goto,-hicpp-avoid-goto")
     endif()
 else()
     message(STATUS "LINTING is OFF")