X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d85949accc8820a54c468fbdf930063be5873296..e2030cb82d5b8f8b39696794f036e5ffc435f9bf:/acmacro/ax_cxx_check_lib.m4

diff --git a/acmacro/ax_cxx_check_lib.m4 b/acmacro/ax_cxx_check_lib.m4
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-dnl @synopsis AX_CXX_CHECK_LIB(libname, functioname, action-if, action-if-not)
-dnl
-dnl The standard AC_CHECK_LIB can not test functions in namespaces.
-dnl Therefore AC_CHECK_LIB(cgicc, cgicc::Cgicc::getVersion) will always
-dnl fail. We need to decompose the functionname into a series of namespaces
-dnl where it gets declared so that it can be used for a link test.
-dnl
-dnl In the first version I did allow namespace::functionname to be a
-dnl reference to a void-argument global functionname (just wrapped in a
-dnl namespace) like its C counterparts would be - but in reality such
-dnl thing does not exist. The only global / static functions are always
-dnl made const-functions which is an attribute mangled along into the
-dnl library function export name. 
-dnl
-dnl The normal usage will ask for a test of a class-member function which
-dnl should be presented with a full function spec with arguments given in 
-dnl parentheses following the function name - if the function to test for 
-dnl does expect arguments then you should add default initial values in the 
-dnl prototype (even if they do not exist originally, these are used only 
-dnl locally to build a correct function call in the configure test script).
-dnl
-dnl In the current version if you do omit the parenthesis from the macro
-dnl argument then the macro will assume that you want to check for the
-dnl class name - which is really to check for default constructor being
-dnl exported from the given library name. 
-dnl
-dnl   EXAMPLE:
-dnl AX_CXX_CHECK_LIB(cgicc, [cgicc::HTTPCookie])
-dnl AX_CXX_CHECK_LIB(cgicc, [cgicc::Cgicc::getVersion () const],
-dnl AX_CXX_CHECK_LIB(boost_regex, [boost::RegEx::Position (int i = 0) const])
-dnl
-dnl Result:
-dnl Just as the usual AX_CXX_CHECK_LIB - defines HAVE_LIBCGICC 
-dnl and adds the libraries to the default library path (and
-dnl uses internally the normal ac_check_lib cache symbol
-dnl like ac_cv_lib_cgicc_cgicc__Cgicc)
-dnl
-dnl Footnote: The C++ language is not good at creating stable library
-dnl interfaces at the binary level - a lot of functionality is usually being 
-dnl given as inline functions plus there is hardly a chance to create opaque 
-dnl types. Therefore most C++ library tests will only do compile tests using
-dnl the header files. Doing a check_lib is however good to check the link
-dnl dependency before hitting it as an error in the build later.
-dnl
-dnl @category C++
-dnl @author Guido U. Draheim
-dnl @vesion 2006-12-18
-
-AC_DEFUN([AX_CXX_CHECK_LIB],
-[m4_ifval([$3], , [AH_CHECK_LIB([$1])])dnl
-AS_LITERAL_IF([$1],
-	      [AS_VAR_PUSHDEF([ac_Lib], [ac_cv_lib_$1_$2])],
-	      [AS_VAR_PUSHDEF([ac_Lib], [ac_cv_lib_$1''_$2])])dnl
-AC_CACHE_CHECK([for $2 in -l$1], ac_Lib,
-[ac_check_lib_save_LIBS=$LIBS
-LIBS="-l$1 $5 $LIBS"
-case "$2" 
-in *::*::*\(*)
-AC_LINK_IFELSE([AC_LANG_PROGRAM([
- namespace `echo "$2" | sed -e "s/::.*//"` 
- { class `echo "$2" | sed -e "s/.*::\\(.*\\)::.*/\\1/" -e "s/(.*//"` 
-   { public: int `echo "$2" | sed -e "s/.*:://" -e "/(/!s/..*/&()/"`;
-   };
- }
-],[`echo "$2" | sed  -e "s/(.*//" -e "s/\\(.*\\)::\\(.*\\)/((\\1*)(0))->\\2/g"`()])],
-	       [AS_VAR_SET(ac_Lib, yes)],
-	       [AS_VAR_SET(ac_Lib, no)])
-;; *::*::*)
-AC_LINK_IFELSE([AC_LANG_PROGRAM([
- namespace `echo "$2" | sed -e "s/::.*//"` 
- { namespace `echo "$2" | sed -e "s/.*::\\(.*\\)::.*/\\1/"` 
-   { class `echo "$2" | sed -e "s/.*:://"` 
-      { public: `echo "$2" | sed -e "s/.*:://"` ();
-      };
-   }
- }
-],[new $2()])],
-	       [AS_VAR_SET(ac_Lib, yes)],
-	       [AS_VAR_SET(ac_Lib, no)])
-;; *::*\(*)
-AC_LINK_IFELSE([AC_LANG_PROGRAM([
- class `echo "$2" | sed -e "s/\\(.*\\)::.*/\\1/" -e "s/(.*//"` 
-   { public: int `echo "$2" | sed -e "s/.*:://" -e "/(/!s/..*/&()/"`;
-   };
-],[`echo "$2" | sed  -e "s/(.*//" -e "s/\\(.*\\)::\\(.*\\)/((\\1*)(0))->\\2/g"`()])],
-	       [AS_VAR_SET(ac_Lib, yes)],
-	       [AS_VAR_SET(ac_Lib, no)])
-;; *::*)
-AC_LINK_IFELSE([AC_LANG_PROGRAM([
- namespace `echo "$2" | sed -e "s/::.*//"` 
- { class `echo "$2" | sed -e "s/.*:://"`
-   { public: `echo "$2" | sed -e "s/.*:://"` ();
-   };
- }
-],[new $2()])],
-	       [AS_VAR_SET(ac_Lib, yes)],
-	       [AS_VAR_SET(ac_Lib, no)])
-;; *)
-AC_LINK_IFELSE([AC_LANG_CALL([], [$2])],
-	       [AS_VAR_SET(ac_Lib, yes)],
-	       [AS_VAR_SET(ac_Lib, no)])
-;; esac
-LIBS=$ac_check_lib_save_LIBS])
-AS_IF([test AS_VAR_GET(ac_Lib) = yes],
-      [m4_default([$3], [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_LIB$1))
-  LIBS="-l$1 $LIBS"
-])],
-      [$4])dnl
-AS_VAR_POPDEF([ac_Lib])dnl
-])# AC_CHECK_LIB