warn on realloc GCC

Author: scivision

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.15)  # implicit CMP0094
 
 if(NOT CMAKE_BUILD_TYPE)
-  set(CMAKE_BUILD_TYPE Release CACHE STRING "default build type")
+  set(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING "default build type")
 endif()
 
 project(Fortran2018Examples

cmake/compilers.cmake

@@ -25,24 +25,22 @@ if(CMAKE_Fortran_COMPILER_ID STREQUAL Intel)
     add_compile_options(/arch:native)
     string(APPEND CMAKE_Fortran_FLAGS " /traceback /warn /heap-arrays")
     string(APPEND CMAKE_Fortran_FLAGS_DEBUG " /stand:f18")
-    string(APPEND CMAKE_Fortran_FLAGS_DEBUG " /debug /check:all")
+    string(APPEND CMAKE_Fortran_FLAGS " /debug /check:all")
   else()
     add_compile_options(-march=native)
     string(APPEND CMAKE_Fortran_FLAGS " -traceback -warn -heap-arrays")
     string(APPEND CMAKE_Fortran_FLAGS_DEBUG " -stand f18")
-    string(APPEND CMAKE_Fortran_FLAGS_DEBUG " -debug extended -check all")
+    string(APPEND CMAKE_Fortran_FLAGS " -debug extended -check all")
   endif()
 elseif(CMAKE_Fortran_COMPILER_ID STREQUAL GNU)
   add_compile_options(-mtune=native -Wall)
   if(CMAKE_Fortran_COMPILER_VERSION VERSION_GREATER_EQUAL 8)
     string(APPEND CMAKE_Fortran_FLAGS " -std=f2018")
   endif()
-  if(CMAKE_Fortran_COMPILER_VERSION VERSION_EQUAL 9.3.0)
-    string(APPEND CMAKE_Fortran_FLAGS " -Wno-maybe-uninitialized")
-  endif()
-  string(APPEND CMAKE_Fortran_FLAGS " -fimplicit-none")
 
-  string(APPEND CMAKE_Fortran_FLAGS_DEBUG " -Werror=array-bounds -fcheck=all")
+  string(APPEND CMAKE_Fortran_FLAGS " -fimplicit-none")
+  string(APPEND CMAKE_Fortran_FLAGS " -Wrealloc-lhs")  # not -Wrealloc-lhs-all which warns on character
+  string(APPEND CMAKE_Fortran_FLAGS " -Werror=array-bounds -fcheck=all")
 elseif(CMAKE_Fortran_COMPILER_ID STREQUAL PGI)
   string(APPEND CMAKE_Fortran_FLAGS " -C -Mdclchk")
 elseif(CMAKE_Fortran_COMPILER_ID STREQUAL NAG)