+ AC_REQUIRE([AC_C_INLINE])
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_REQUIRE([gl_GETOPT_SUBSTITUTE])
+ AC_CHECK_DECLS([program_invocation_name, program_invocation_short_name],,,
+ [#include <errno.h>])
+ AC_CHECK_DECLS_ONCE(
+ [clearerr_unlocked feof_unlocked ferror_unlocked
+ fflush_unlocked fgets_unlocked fputc_unlocked fputs_unlocked
+ fread_unlocked fwrite_unlocked getc_unlocked
+ getchar_unlocked putc_unlocked putchar_unlocked])
+ AC_CHECK_FUNCS_ONCE([flockfile funlockfile])
+ AC_CHECK_HEADERS_ONCE([features.h linewrap.h])