Better options for gfortran

ConfigureCompilerFlags.cmake

@@ -6,7 +6,7 @@ if(CMAKE_Fortran_COMPILER_ID MATCHES GNU)
   string(APPEND CMAKE_Fortran_FLAGS
     " -fmax-errors=1 -pedantic -Wall -Wcharacter-truncation -Wunused-parameter"
     " -Wno-conversion -Wimplicit-interface -Wimplicit-procedure"
-    " -Wno-integer-division")
+    " -Wno-integer-division -Wno-maybe-uninitialized")
 
   # Debugging options:
   set(CMAKE_Fortran_FLAGS_DEBUG "-fbacktrace -g -ffpe-trap=zero,overflow")
@@ -15,7 +15,8 @@ if(CMAKE_Fortran_COMPILER_ID MATCHES GNU)
 
   # Code generation options:
   string(APPEND CMAKE_Fortran_FLAGS_DEBUG
-    " -fcheck=bounds,do,mem,pointer,recursion -finit-real=nan -O0")
+    " -fcheck=bounds,do,mem,pointer,recursion -finit-derived -finit-real=snan "
+    "-O0")
 
   # Optimization options:
   set(CMAKE_Fortran_FLAGS_RELEASE -O3)