cmake_modules/FindReadline.cmake

   1 find_path(READLINE_INCLUDE_DIR readline/readline.h)
   2 find_library(READLINE_LIBRARY NAMES readline)
   3
   4 if (READLINE_INCLUDE_DIR AND READLINE_LIBRARY)
   5   set (READLINE_FOUND TRUE)
   6 endif ()
   7
   8 if (READLINE_INCLUDE_DIR AND EXISTS "${READLINE_INCLUDE_DIR}/readline/readline.h")
   9   file(STRINGS "${READLINE_INCLUDE_DIR}/readline/readline.h"
  10                READLINE_MAJOR_VERSION
  11        REGEX "^#define RL_VERSION_MAJOR.*$")
  12   file(STRINGS "${READLINE_INCLUDE_DIR}/readline/readline.h"
  13                READLINE_MINOR_VERSION
  14        REGEX "^#define RL_VERSION_MINOR.*$")
  15
  16   string(REGEX REPLACE "^.*RL_VERSION_MAJOR.*([0-9]+).*$"
  17                        "\\1"
  18                        READLINE_MAJOR_VERSION
  19                        "${READLINE_MAJOR_VERSION}")
  20   string(REGEX REPLACE "^.*RL_VERSION_MINOR.*([0-9]+).*$"
  21                        "\\1"
  22                        READLINE_MINOR_VERSION
  23                        "${READLINE_MINOR_VERSION}")
  24
  25   if(READLINE_MAJOR_VERSION)
  26     set(READLINE_VERSION "${READLINE_MAJOR_VERSION}.${READLINE_MINOR_VERSION}")
  27   else()
  28     set(READLINE_VERSION "(unknown)")
  29   endif()
  30 endif ()
  31
  32 if (READLINE_FOUND)
  33   if (Readline_FIND_VERSION VERSION_GREATER READLINE_VERSION)
  34     message(STATUS "Found version ${READLINE_VERSION} of GNU Readline at ${READLINE_LIBRARY}, but version ${Readline_FIND_VERSION} required")
  35     unset(READLINE_FOUND)
  36   else()
  37     if (NOT READLINE_FIND_QUIETLY)
  38       message(STATUS "Found GNU Readline version ${READLINE_VERSION}: ${READLINE_LIBRARY}")
  39     endif ()
  40   endif ()
  41 else ()
  42   if (READLINE_FIND_REQUIRED)
  43     message(FATAL_ERROR "Could not find GNU Readline")
  44   endif ()
  45 endif ()