Avoid false positive warnings turned into an error

* For instance, https://github.com/cp2k/dbcsr/actions/runs/9078189846/job/24944690222
cp2k · May 14, 2024 · f2c634b · f2c634b
1 parent fcff710
commit f2c634b
Showing 1 changed file with 6 additions and 3 deletions.
diff --git a/cmake/CompilerConfiguration.cmake b/cmake/CompilerConfiguration.cmake
@@ -1,9 +1,12 @@
 if (CMAKE_Fortran_COMPILER_ID STREQUAL "GNU")
-  set(CMAKE_Fortran_FLAGS          "${CMAKE_Fortran_FLAGS} -ffree-form -std=f2008ts -fimplicit-none -Werror=aliasing -Werror=ampersand -Werror=c-binding-type -Werror=intrinsic-shadow -Werror=intrinsics-std -Werror=line-truncation -Werror=tabs -Werror=target-lifetime -Werror=underflow -Werror=unused-but-set-parameter -Werror=unused-but-set-variable -Werror=unused-variable -Werror=unused-dummy-argument -Werror=conversion -Werror=zerotrip -Werror=uninitialized -Wno-maybe-uninitialized -Werror=unused-parameter")
-  if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 10)
+  set(CMAKE_Fortran_FLAGS          "${CMAKE_Fortran_FLAGS} -ffree-form -std=f2008ts -fimplicit-none -Werror=aliasing -Werror=ampersand -Werror=c-binding-type -Werror=intrinsic-shadow -Werror=intrinsics-std -Werror=line-truncation -Werror=tabs -Werror=target-lifetime -Werror=underflow -Werror=unused-but-set-parameter -Werror=unused-but-set-variable -Werror=unused-variable -Werror=unused-dummy-argument -Werror=conversion -Werror=zerotrip -Wno-maybe-uninitialized -Werror=unused-parameter")
+  if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 10) # comparison against CXX version rather than GFortran version
     set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Werror=argument-mismatch")  # gcc 10+ has this automatically
    else ()
-    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fallow-argument-mismatch") # requires for 10+ for the MPI wrap module
+    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fallow-argument-mismatch") # required for 10+ (MPI wrap)
+  endif ()
+  if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 13) # comparison against CXX version rather than GFortran version
+    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Werror=uninitialized") # false positive (allocatable array)
   endif ()
   set(CMAKE_Fortran_FLAGS_RELEASE  "-O3 -g -funroll-loops")
   set(CMAKE_Fortran_FLAGS_COVERAGE "-O0 -g --coverage -fno-omit-frame-pointer -fcheck=all,no-array-temps -ffpe-trap=invalid,zero,overflow -fbacktrace -finit-real=snan -finit-integer=-42 -finit-derived -Werror=realloc-lhs -finline-matmul-limit=0 -Werror")