m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
-# Enable more compiler warnings via -Wall and -Wextra.
-CFLAGS="$CFLAGS -Wall -Wextra"
+# Enable more compiler warnings.
+CFLAGS="$CFLAGS -std=c99 -Wall -Wextra -pedantic"
# Checks for programs.
AC_PROG_CC