Hi, I have a question about checking headers. Suppose I have a simple program which includes unistd.h and nothing else. I could AC_CHECK_HEADERS([unistd.h]) but then it checks for the header twice because using AC_CHECK_HEADERS implies checking a whole bunch of headers: checking how to run the C preprocessor... gcc -E checking for grep that handles long lines and -e... /usr/bin/grep checking for egrep... /usr/bin/grep -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking for unistd.h... (cached) yes Is there a way of checking for the AC_INCLUDES_DEFAULT headers without checking for anything else? Calling _AC_INCLUDES_DEFAULT_REQUIREMENTS does this but it doesn't seem to be a public macro. Secondly, AC_TYPE_UINT32_T gives different results depending on whether any headers have been checked before (eg. if I first check for dlfcn.h, stdint.h is automatically checked for, but otherwise it is not). This seems nonintuitive; is it supposed to be like this? Lastly, AC_HEADER_STDC is declared obsolete yet it is required by _AC_INCLUDES_DEFAULT_REQUIREMENTS. Why is this? Thanks -- Ross Lagerwall _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf
