ENH: Improve detection of perl.h/libperl, issue #7898

Modules/FindPerlLibs.cmake

@@ -3,63 +3,226 @@
 # and libraries are. It also determines what the name of the library is. This
 # code sets the following variables:
 #
+#  PERLLIBS_FOUND    = True if perl.h & libperl were found
 #  PERL_INCLUDE_PATH = path to where perl.h is found
+#  PERL_LIBRARY      = path to libperl
 #  PERL_EXECUTABLE   = full path to the perl binary
 #
+#  The following variables are also available if needed
+#  (introduced after CMake 2.6.4)
+#
+#  PERL_SITESEARCH    = path to the sitesearch install dir
+#  PERL_SITELIB       = path to the sitelib install directory
+#  PERL_VENDORARCH    = path to the vendor arch install directory
+#  PERL_VENDORLIB     = path to the vendor lib install directory
+#  PERL_ARCHLIB       = path to the arch lib install directory
+#  PERL_PRIVLIB       = path to the priv lib install directory
+#  PERL_EXTRA_C_FLAGS = Compilation flags used to build perl
+#
+
+# find the perl executable
+include(FindPerl)
 
-SET(PERL_POSSIBLE_INCLUDE_PATHS
-  /usr/lib/perl/5.8.3/CORE
-  /usr/lib/perl/5.8.2/CORE
-  /usr/lib/perl/5.8.1/CORE
-  /usr/lib/perl/5.8.0/CORE
-  /usr/lib/perl/5.8/CORE
+if (PERL_EXECUTABLE)
+  ### PERL_PREFIX
+  execute_process(
+    COMMAND
+      ${PERL_EXECUTABLE} -V:prefix
+      OUTPUT_VARIABLE
+        PERL_PREFIX_OUTPUT_VARIABLE
+      RESULT_VARIABLE
+        PERL_PREFIX_RESULT_VARIABLE
   )
 
-SET(PERL_POSSIBLE_LIB_PATHS
-  /usr/lib
+  if (NOT PERL_PREFIX_RESULT_VARIABLE)
+    string(REGEX REPLACE "prefix='([^']+)'.*" "\\1" PERL_PREFIX ${PERL_PREFIX_OUTPUT_VARIABLE})
+  endif (NOT PERL_PREFIX_RESULT_VARIABLE)
+
+  ### PERL_VERSION
+  execute_process(
+    COMMAND
+      ${PERL_EXECUTABLE} -V:version
+      OUTPUT_VARIABLE
+        PERL_VERSION_OUTPUT_VARIABLE
+      RESULT_VARIABLE
+        PERL_VERSION_RESULT_VARIABLE
   )
+  if (NOT PERL_VERSION_RESULT_VARIABLE)
+    string(REGEX REPLACE "version='([^']+)'.*" "\\1" PERL_VERSION ${PERL_VERSION_OUTPUT_VARIABLE})
+  endif (NOT PERL_VERSION_RESULT_VARIABLE)
 
-FIND_PATH(PERL_INCLUDE_PATH perl.h
-  ${PERL_POSSIBLE_INCLUDE_PATHS})
+  ### PERL_ARCHNAME
+  execute_process(
+    COMMAND
+      ${PERL_EXECUTABLE} -V:archname
+      OUTPUT_VARIABLE
+        PERL_ARCHNAME_OUTPUT_VARIABLE
+      RESULT_VARIABLE
+        PERL_ARCHNAME_RESULT_VARIABLE
+  )
+  if (NOT PERL_ARCHNAME_RESULT_VARIABLE)
+    string(REGEX REPLACE "archname='([^']+)'.*" "\\1" PERL_ARCHNAME ${PERL_ARCHNAME_OUTPUT_VARIABLE})
+  endif (NOT PERL_ARCHNAME_RESULT_VARIABLE)
 
-# find the perl executable
-INCLUDE(FindPerl)
 
 
-IF(PERL_EXECUTABLE)
-  EXEC_PROGRAM(${PERL_EXECUTABLE}
-    ARGS -e "'use Config; print \$Config{libperl}, \"\\n\"'"
-    OUTPUT_VARIABLE PERL_LIBRARY_OUTPUT_VARIABLE
-    RETURN_VALUE PERL_LIBRARY_RETURN_VALUE
+  ### PERL_EXTRA_C_FLAGS
+  execute_process(
+    COMMAND
+      ${PERL_EXECUTABLE} -V:cppflags
+    OUTPUT_VARIABLE
+      PERL_CPPFLAGS_OUTPUT_VARIABLE
+    RESULT_VARIABLE
+      PERL_CPPFLAGS_RESULT_VARIABLE
     )
-  IF(NOT PERL_LIBRARY_RETURN_VALUE)
-    FOREACH(path ${PERL_POSSIBLE_LIB_PATHS})
-      SET(PERL_POSSIBLE_LIBRARY_NAME ${PERL_POSSIBLE_LIBRARY_NAME} "${path}/${PERL_LIBRARY_OUTPUT_VARIABLE}")
-    ENDFOREACH(path ${PERL_POSSIBLE_LIB_PATHS})
-  ENDIF(NOT PERL_LIBRARY_RETURN_VALUE)
-  EXEC_PROGRAM(${PERL_EXECUTABLE}
-    ARGS -e "'use Config; print \$Config{cppflags}, \"\\n\"'"
-    OUTPUT_VARIABLE PERL_CPPFLAGS_OUTPUT_VARIABLE
-    RETURN_VALUE PERL_CPPFLAGS_RETURN_VALUE
+  if (NOT PERL_CPPFLAGS_RESULT_VARIABLE)
+    string(REGEX REPLACE "cppflags='([^']+)'.*" "\\1" PERL_EXTRA_C_FLAGS ${PERL_CPPFLAGS_OUTPUT_VARIABLE})
+  endif (NOT PERL_CPPFLAGS_RESULT_VARIABLE)
+
+  ### PERL_SITESEARCH
+  execute_process(
+    COMMAND
+      ${PERL_EXECUTABLE} -V:installsitesearch
+    OUTPUT_VARIABLE
+      PERL_SITESEARCH_OUTPUT_VARIABLE
+    RESULT_VARIABLE
+      PERL_SITESEARCH_RESULT_VARIABLE
+  )
+  if (NOT PERL_SITESEARCH_RESULT_VARIABLE)
+    string(REGEX REPLACE "install[a-z]+='([^']+)'.*" "\\1" PERL_SITESEARCH ${PERL_SITESEARCH_OUTPUT_VARIABLE})
+  endif (NOT PERL_SITESEARCH_RESULT_VARIABLE)
+
+  ### PERL_SITELIB
+  execute_process(
+    COMMAND
+      ${PERL_EXECUTABLE} -V:installsitelib
+    OUTPUT_VARIABLE
+      PERL_SITELIB_OUTPUT_VARIABLE
+    RESULT_VARIABLE
+      PERL_SITELIB_RESULT_VARIABLE
+  )
+  if (NOT PERL_SITELIB_RESULT_VARIABLE)
+    string(REGEX REPLACE "install[a-z]+='([^']+)'.*" "\\1" PERL_SITELIB ${PERL_SITELIB_OUTPUT_VARIABLE})
+  endif (NOT PERL_SITELIB_RESULT_VARIABLE)
+
+  ### PERL_VENDORARCH
+  execute_process(
+    COMMAND
+      ${PERL_EXECUTABLE} -V:installvendorarch
+    OUTPUT_VARIABLE
+      PERL_VENDORARCH_OUTPUT_VARIABLE
+    RESULT_VARIABLE
+      PERL_VENDORARCH_RESULT_VARIABLE
     )
-  IF(NOT PERL_CPPFLAGS_RETURN_VALUE)
-    SET(PERL_EXTRA_C_FLAGS ${PERL_CPPFLAGS_OUTPUT_VARIABLE})
-  ENDIF(NOT PERL_CPPFLAGS_RETURN_VALUE)
-ENDIF(PERL_EXECUTABLE)
-
-FIND_LIBRARY(PERL_LIBRARY
-  NAMES ${PERL_POSSIBLE_LIBRARY_NAME} perl5.8.0
-  PATHS ${PERL_POSSIBLE_LIB_PATHS}
+  if (NOT PERL_VENDORARCH_RESULT_VARIABLE)
+    string(REGEX REPLACE "install[a-z]+='([^']+)'.*" "\\1" PERL_VENDORARCH ${PERL_VENDORARCH_OUTPUT_VARIABLE})
+  endif (NOT PERL_VENDORARCH_RESULT_VARIABLE)
+
+  ### PERL_VENDORLIB
+  execute_process(
+    COMMAND
+      ${PERL_EXECUTABLE} -V:installvendorlib
+    OUTPUT_VARIABLE
+      PERL_VENDORLIB_OUTPUT_VARIABLE
+    RESULT_VARIABLE
+      PERL_VENDORLIB_RESULT_VARIABLE
+  )
+  if (NOT PERL_VENDORLIB_RESULT_VARIABLE)
+    string(REGEX REPLACE "install[a-z]+='([^']+)'.*" "\\1" PERL_VENDORLIB ${PERL_VENDORLIB_OUTPUT_VARIABLE})
+  endif (NOT PERL_VENDORLIB_RESULT_VARIABLE)
+
+  ### PERL_ARCHLIB
+  execute_process(
+    COMMAND
+      ${PERL_EXECUTABLE} -V:installarchlib
+      OUTPUT_VARIABLE
+        PERL_ARCHLIB_OUTPUT_VARIABLE
+      RESULT_VARIABLE
+        PERL_ARCHLIB_RESULT_VARIABLE
   )
+  if (NOT PERL_ARCHLIB_RESULT_VARIABLE)
+    string(REGEX REPLACE "install[a-z]+='([^']+)'.*" "\\1" PERL_ARCHLIB ${PERL_ARCHLIB_OUTPUT_VARIABLE})
+  endif (NOT PERL_ARCHLIB_RESULT_VARIABLE)
+
+  ### PERL_PRIVLIB
+  execute_process(
+    COMMAND
+      ${PERL_EXECUTABLE} -V:installprivlib
+    OUTPUT_VARIABLE
+      PERL_PRIVLIB_OUTPUT_VARIABLE
+    RESULT_VARIABLE
+      PERL_PRIVLIB_RESULT_VARIABLE
+  )
+  if (NOT PERL_PRIVLIB_RESULT_VARIABLE)
+    string(REGEX REPLACE "install[a-z]+='([^']+)'.*" "\\1" PERL_PRIVLIB ${PERL_PRIVLIB_OUTPUT_VARIABLE})
+  endif (NOT PERL_PRIVLIB_RESULT_VARIABLE)
+
+
+  ### PERL_POSSIBLE_INCLUDE_PATHS
+  set(PERL_POSSIBLE_INCLUDE_PATHS
+    /usr/lib/perl5/${PERL_VERSION}/${PERL_ARCHNAME}/CORE
+    /usr/lib/perl/${PERL_VERSION}/${PERL_ARCHNAME}/CORE
+    /usr/lib/perl5/${PERL_VERSION}/CORE
+    /usr/lib/perl/${PERL_VERSION}/CORE
+    )
+
+  ### PERL_POSSIBLE_LIB_PATHS
+  set(PERL_POSSIBLE_LIB_PATHS
+    ${PERL_ARCHLIB}/CORE
+    /usr/lib/perl5/${PERL_VERSION}/${PERL_ARCHNAME}/CORE
+    /usr/lib/perl/${PERL_VERSION}/${PERL_ARCHNAME}/CORE
+    /usr/lib/perl5/${PERL_VERSION}/CORE
+    /usr/lib/perl/${PERL_VERSION}/CORE
+  )
+
+  ### PERL_POSSIBLE_LIBRARY_NAME
+  execute_process(
+    COMMAND
+      ${PERL_EXECUTABLE} -V:libperl
+    OUTPUT_VARIABLE
+      PERL_LIBRARY_OUTPUT_VARIABLE
+    RESULT_VARIABLE
+      PERL_LIBRARY_RESULT_VARIABLE
+  )
+  if (NOT PERL_LIBRARY_RESULT_VARIABLE)
+    foreach(_perl_lib_path ${PERL_POSSIBLE_LIB_PATHS})
+      string(REGEX REPLACE "libperl='([^']+)'" "\\1" PERL_LIBRARY_OUTPUT_VARIABLE ${PERL_LIBRARY_OUTPUT_VARIABLE})
+      set(PERL_POSSIBLE_LIBRARY_NAME ${PERL_POSSIBLE_LIBRARY_NAME} "${_perl_lib_path}/${PERL_LIBRARY_OUTPUT_VARIABLE}")
+    endforeach(_perl_lib_path ${PERL_POSSIBLE_LIB_PATHS})
+  endif (NOT PERL_LIBRARY_RESULT_VARIABLE)
+
+  ### PERL_INCLUDE_PATH
+  find_path(PERL_INCLUDE_PATH
+    NAMES
+      perl.h
+    PATHS
+      ${PERL_POSSIBLE_INCLUDE_PATHS}
+  )
+  
+  ### PERL_LIBRARY
+  find_library(PERL_LIBRARY
+    NAMES
+      ${PERL_POSSIBLE_LIBRARY_NAME}
+      perl${PERL_VERSION}
+      perl
+    PATHS
+      ${PERL_POSSIBLE_LIB_PATHS}
+  )
+
+endif (PERL_EXECUTABLE)
 
 # handle the QUIETLY and REQUIRED arguments and set PERLLIBS_FOUND to TRUE if 
 # all listed variables are TRUE
 INCLUDE(FindPackageHandleStandardArgs)
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(PerlLibs DEFAULT_MSG PERL_LIBRARY PERL_INCLUDE_PATH)
 
+# Introduced after CMake 2.6.4 to bring module into compliance
+set(PERL_INCLUDE_DIR  ${PERL_INCLUDE_PATH})
+set(PERL_INCLUDE_DIRS ${PERL_INCLUDE_PATH})
+set(PERL_LIBRARIES    ${PERL_LIBRARY})
 
-MARK_AS_ADVANCED(
+mark_as_advanced(
   PERL_INCLUDE_PATH
   PERL_EXECUTABLE
   PERL_LIBRARY
-  )
+)