* m4/gccoptim.m4: Add missing AC_LANG_PUSH/AC_LANG_POP around the C test. It was using the C++ compiler instead...
* Makefile.am (EXTRA_DIST): Add them. * configure.ac: Call adl_ENABLE_DEVEL, adl_ENABLE_DEBUG, ad_GCC_OPTIM, and adl_NDEBUG.