AC_CHECK_HEADERS_ONCE defines HAVE_ALLOCA_H if it is found. --- configure.ac | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/configure.ac b/configure.ac index ee352790..d8f81d09 100644 --- a/configure.ac +++ b/configure.ac @@ -314,7 +314,8 @@ case $sysdesc in esac AC_CHECK_HEADER([syslog.h], [AC_DEFINE([HAVE_SYSLOG], [1], [Define to 1 if you have the <syslog.h> header file])]) -AC_CHECK_HEADER([alloca.h], [AC_DEFINE([HAVE_ALLOCA_H], [1], [Define to 1 if you have the <alloca.h> header file])]) +AC_CHECK_HEADERS_ONCE([alloca.h]) + AC_MSG_CHECKING([whether 'struct sockaddr' has sa_len]) AC_COMPILE_IFELSE([ AC_LANG_PROGRAM( -- 2.12.0
