Changed the condition to add extra targets regarding formatting in cmake

This helps other projects dependent on Fortran-support to avoid having the same names for targets

CMakeLists.txt

@@ -56,52 +56,55 @@ install(
 
 include("${PROJECT_SOURCE_DIR}/cmake/list_sources.cmake")
 
-# Collect source files of the project:
-list_sources(format_sources)
-# Exclude source files of the external projects:
-list(FILTER format_sources EXCLUDE REGEX "/_deps/")
-# Exclude the configuration header file, which does not have the GENERATED
-# property ON because it is automatically generated at the configure time and
-# not at the build time:
-list(REMOVE_ITEM format_sources "${CMAKE_CURRENT_BINARY_DIR}/src/config.h")
-
-# Exclude source files (not yet automatically) generated with Ragel:
-file(GLOB ragel_sources "${CMAKE_CURRENT_SOURCE_DIR}/src/*.rl")
-list(TRANSFORM ragel_sources REPLACE "rl$" "c")
-list(REMOVE_ITEM format_sources ${ragel_sources})
-
-# Collect C/C++ source files:
-set(c_format_sources "${format_sources}")
-list(FILTER c_format_sources INCLUDE REGEX "\.(c|h|cpp|hpp)$")
-
-add_custom_target(format-c
-  COMMAND
-    clang-format
-    --style=file
-    -i
-    ${c_format_sources}
-)
-
-# Collect Fortran source files:
-set(fortran_format_sources "${format_sources}")
-list(FILTER fortran_format_sources INCLUDE REGEX "\.(f|F|f90|F90)$")
-
-add_custom_target(format-fortran
-  COMMAND
-    # We do not use a config file but specify the formatting arguments on the
-    # command line because the feature requires an extra Python package and
-    # does not work for certain arguments even in the latest release
-    # (e.g., see https://github.com/pseewald/fprettify/issues/94):
-    fprettify
-    --case 2 2 2 1
-    --indent 2
-    --whitespace 2
-    --strip-comments
-    ${fortran_format_sources}
-)
-
-add_custom_target(format
-  DEPENDS
-    format-c
-    format-fortran
-)
+# The following targets are only added if this is a parent project
+if("${CMAKE_PROJECT_NAME}" STREQUAL "${PROJECT_NAME}")
+  # Collect source files of the project:
+  list_sources(format_sources)
+  # Exclude source files of the external projects:
+  list(FILTER format_sources EXCLUDE REGEX "/_deps/")
+  # Exclude the configuration header file, which does not have the GENERATED
+  # property ON because it is automatically generated at the configure time and
+  # not at the build time:
+  list(REMOVE_ITEM format_sources "${CMAKE_CURRENT_BINARY_DIR}/src/config.h")
+
+  # Exclude source files (not yet automatically) generated with Ragel:
+  file(GLOB ragel_sources "${CMAKE_CURRENT_SOURCE_DIR}/src/*.rl")
+  list(TRANSFORM ragel_sources REPLACE "rl$" "c")
+  list(REMOVE_ITEM format_sources ${ragel_sources})
+
+  # Collect C/C++ source files:
+  set(c_format_sources "${format_sources}")
+  list(FILTER c_format_sources INCLUDE REGEX "\.(c|h|cpp|hpp)$")
+
+  add_custom_target(format-c
+    COMMAND
+      clang-format
+      --style=file
+      -i
+      ${c_format_sources}
+  )
+
+  # Collect Fortran source files:
+  set(fortran_format_sources "${format_sources}")
+  list(FILTER fortran_format_sources INCLUDE REGEX "\.(f|F|f90|F90)$")
+
+  add_custom_target(format-fortran
+    COMMAND
+      # We do not use a config file but specify the formatting arguments on the
+      # command line because the feature requires an extra Python package and
+      # does not work for certain arguments even in the latest release
+      # (e.g., see https://github.com/pseewald/fprettify/issues/94):
+      fprettify
+      --case 2 2 2 1
+      --indent 2
+      --whitespace 2
+      --strip-comments
+      ${fortran_format_sources}
+  )
+
+  add_custom_target(format
+    DEPENDS
+      format-c
+      format-fortran
+  )
+endif()