<-- snip --> $ autoconf --version autoconf (GNU Autoconf) 2.69.22-787a ... $ gcc --version gcc (Debian 4.7.1-9) 4.7.1 ... $ cat configure.ac AC_INIT
AC_PROG_CC_C99 AC_PROG_CC_C11 $ ./configure checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for gcc option to accept ISO C99... -std=gnu99 checking for gcc -std=gnu99 option to accept ISO C11... none needed $ <-- snip --> cu Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed