Hello,
I think that AC_CXX_CHECK_LIB fits not very good into the AC_LANG_PUSH ...
concept but I suppose there is no chance to avoid a new function. The problem
with AC_CHECK_LIB is that it uses C linkage for C++ libraries. I think the
interface to a C++ library check should look like:
AC_CXX_CHECK_LIB (LIBRARY, DECLARATION-SECTION,CALL-SECTION,
[ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND], [OTHER-LIBRARIES])
If someone uses header files in the DECLARATION-SECTION he is responsible to
check them. If header files are not availible, she can write the necessary
declarations explicitly.
An alternative is to write no new function, but place a hint into the
documentation that you cannot use AC_CHECK_LIB for C++ an should use
AC_TRY_LINK.
Ciao
Sebastian