cmake: drop seemingly redundant quotations

CMakeLists.txt

@@ -17,7 +17,7 @@ option(MTIME_ENABLE_FORTRAN_HL "Enable the high-level Fortran interface" ON)
 option(MTIME_BUILD_EXAMPLES "Build examples" ON)
 option(MTIME_BUILD_DOCS "Build documentation" OFF)
 
-list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake")
+list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
 
 # Set line limit to none for GNU compiler (default is 132) to enable long
 # __FILE__ macro:
@@ -45,28 +45,26 @@ if(MTIME_BUILD_DOCS)
   add_subdirectory(doc)
 endif()
 
-export(EXPORT "mtime-targets" FILE "${PROJECT_BINARY_DIR}/mtime-targets.cmake")
+export(EXPORT mtime-targets FILE ${PROJECT_BINARY_DIR}/mtime-targets.cmake)
 
 include(CMakePackageConfigHelpers)
 configure_package_config_file(
-  "${PROJECT_SOURCE_DIR}/cmake/config.cmake.in"
-  "${PROJECT_BINARY_DIR}/mtime-config.cmake"
-  INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake"
+  ${PROJECT_SOURCE_DIR}/cmake/config.cmake.in
+  ${PROJECT_BINARY_DIR}/mtime-config.cmake
+  INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake
   NO_SET_AND_CHECK_MACRO NO_CHECK_REQUIRED_COMPONENTS_MACRO
 )
 
 write_basic_package_version_file(
-  "${PROJECT_BINARY_DIR}/mtime-config-version.cmake"
-  VERSION "${mtime_VERSION_MAJOR}.${mtime_VERSION_MINOR}"
+  ${PROJECT_BINARY_DIR}/mtime-config-version.cmake
+  VERSION ${mtime_VERSION_MAJOR}.${mtime_VERSION_MINOR}
   COMPATIBILITY AnyNewerVersion
 )
 
-install(
-  EXPORT "mtime-targets" DESTINATION "${CMAKE_INSTALL_LIBDIR}/mtime/cmake"
-)
+install(EXPORT mtime-targets DESTINATION ${CMAKE_INSTALL_LIBDIR}/mtime/cmake)
 
 install(
-  FILES "${PROJECT_BINARY_DIR}/mtime-config.cmake"
-        "${PROJECT_BINARY_DIR}/mtime-config-version.cmake"
-  DESTINATION "${CMAKE_INSTALL_LIBDIR}/mtime/cmake"
+  FILES ${PROJECT_BINARY_DIR}/mtime-config.cmake
+        ${PROJECT_BINARY_DIR}/mtime-config-version.cmake
+  DESTINATION ${CMAKE_INSTALL_LIBDIR}/mtime/cmake
 )

cmake/FindCheck.cmake

@@ -21,8 +21,8 @@ if(NOT TARGET Check::Interface)
       add_library(Check::Interface UNKNOWN IMPORTED)
       set_target_properties(
         Check::Interface
-        PROPERTIES IMPORTED_LOCATION "${Check_LIBRARY}"
-                   INTERFACE_INCLUDE_DIRECTORIES "${Check_INCLUDE_DIR}"
+        PROPERTIES IMPORTED_LOCATION ${Check_LIBRARY}
+                   INTERFACE_INCLUDE_DIRECTORIES ${Check_INCLUDE_DIR}
       )
     endif()
   endif()

cmake/SearchFunctionLibrary.cmake

@@ -22,7 +22,7 @@
 function(search_function_library function var_found var_library)
   cmake_parse_arguments(PARSE_ARGV 3 ARG "" "" "OPTIONS")
 
-  if(DEFINED "${var_found}")
+  if(DEFINED ${var_found})
     return()
   endif()
 
@@ -33,7 +33,7 @@ function(search_function_library function var_found var_library)
   set(CMAKE_REQUIRED_QUIET True)
   set(save_CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES}")
 
-  if(DEFINED "${var_library}")
+  if(DEFINED ${var_library})
     set(options "${${var_library}}")
   else()
     set(options ";${ARG_OPTIONS}")

cmake/config.cmake.in

@@ -5,7 +5,7 @@
 
 @PACKAGE_INIT@
 
-include("${CMAKE_CURRENT_LIST_DIR}/mtime-targets.cmake")
+include(${CMAKE_CURRENT_LIST_DIR}/mtime-targets.cmake)
 
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(mtime REQUIRED_VARS mtime_DIR)

src/CMakeLists.txt

@@ -61,11 +61,11 @@ endif()
 
 add_library(mtime::mtime ALIAS mtime)
 
-set(Fortran_MODULE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/mod")
+set(Fortran_MODULE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/mod)
 set_target_properties(
   mtime
   PROPERTIES Fortran_PREPROCESS ON
-             Fortran_MODULE_DIRECTORY "${Fortran_MODULE_DIRECTORY}"
+             Fortran_MODULE_DIRECTORY ${Fortran_MODULE_DIRECTORY}
              C_STANDARD 99
              C_STANDARD_REQUIRED ON
              PUBLIC_HEADER "${public_headers}"
@@ -92,6 +92,6 @@ endif()
 
 target_link_libraries(mtime PRIVATE ${MTIME_LIBM})
 
-install(TARGETS mtime EXPORT "mtime-targets")
+install(TARGETS mtime EXPORT mtime-targets)
 
-install(DIRECTORY "${Fortran_MODULE_DIRECTORY}/" TYPE INCLUDE)
+install(DIRECTORY ${Fortran_MODULE_DIRECTORY}/ TYPE INCLUDE)