This macro does not work when the headers #define sigsetjmp to something else. I'm not finding the right alternative. Should the macro be enhanced, or is one expected to know ahead of time that "sigsetjmp" might be a macro and use a different autoconf macro? Thanks - Bruce + gcc -o conftest -g -O2 conftest.c -ldl /net/simpsons/export/ws/ws0/bkorb/tmp/ccZ30ygl.o: In function `main': /local/src/ag/autogen-5.8.5pre99/_b/conftest.c:79: undefined reference to `sigsetjmp' /net/simpsons/export/ws/ws0/bkorb/tmp/ccZ30ygl.o:(.data+0x0): undefined reference to `sigsetjmp' collect2: ld returned 1 exit status $ fgrep 'GNU Autoconf' ../configure # Generated by GNU Autoconf 2.59 for GNU AutoGen 5.8.5pre99. _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf