X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=configure.ac;h=364884999cdf12005f99f50872bd4c94b0603726;hb=b052a89622c02b5888c0ca61e52b19e9dbec29c8;hp=cfef2a11362b7b411ad9face45cb0a1f477969d4;hpb=306cfa82f27bc7fcf798e6bc35e58ea695ef7bf2;p=meshlink

diff --git a/configure.ac b/configure.ac
index cfef2a11..36488499 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,8 +12,9 @@ AM_SILENT_RULES([yes])
 # Enable GNU extensions.
 # Define this here, not in acconfig's @TOP@ section, since definitions
 # in the latter don't make it into the configure-time tests.
-AC_GNU_SOURCE
+AC_USE_SYSTEM_EXTENSIONS
 AC_DEFINE([__USE_BSD], 1, [Enable BSD extensions])
+AC_DEFINE([_POSIX_C_SOURCE], 200809L, [Enable POSIX features])
 
 dnl Checks for programs.
 AM_PROG_CC_C_O
@@ -54,6 +55,8 @@ if test -d /sw/lib ; then
   LIBS="$LIBS -L/sw/lib"
 fi
 
+AX_CHECK_COMPILE_FLAG([-std=c11], [CFLAGS="$CFLAGS -std=c11"])
+
 dnl Compiler hardening flags
 dnl No -fstack-protector-all because it doesn't work on all platforms or architectures.
 
@@ -121,7 +124,7 @@ AM_CONDITIONAL(INSTALL_TESTS, test "$install_tests" = true)
 dnl Checks for header files.
 dnl We do this in multiple stages, because unlike Linux all the other operating systems really suck and don't include their own dependencies.
 
-AC_CHECK_HEADERS([syslog.h sys/file.h sys/param.h sys/resource.h sys/socket.h sys/time.h sys/un.h sys/wait.h netdb.h arpa/inet.h dirent.h curses.h ifaddrs.h])
+AC_CHECK_HEADERS([syslog.h sys/file.h sys/param.h sys/resource.h sys/socket.h sys/time.h sys/un.h sys/wait.h netdb.h arpa/inet.h dirent.h curses.h ifaddrs.h stdatomic.h])
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 MeshLink_ATTRIBUTE(__malloc__)