From: Harlan Stenn <stenn@ntp.org>
Date: Tue, 10 Oct 2006 06:27:12 +0000 (-0400)
Subject: Use NO_OPTION_NAME_WARNINGS if cc does not support #warning
X-Git-Tag: NTP_4_2_3P54~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=852a702069e043b107e7fa3dbc51a9d462b1b625;p=thirdparty%2Fntp.git

Use NO_OPTION_NAME_WARNINGS if cc does not support #warning

bk: 452b3d40Tz2bzh9_F0_pVXspKV_Ywg
---

diff --git a/configure.ac b/configure.ac
index 6a6496a88..7f11a8510 100644
--- a/configure.ac
+++ b/configure.ac
@@ -69,6 +69,17 @@ AMU_OS_CFLAGS
 
 LIBOPTS_CHECK(libopts)
 
+AC_MSG_CHECKING([[if $CC can handle #warning]])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[#warning foo]])],[ac_cv_cpp_warning=yes],[ac_cv_cpp_warning=no])
+AC_MSG_RESULT([$ac_cv_cpp_warning])
+
+case "$ac_cv_cpp_warning" in
+ no)
+    AC_DEFINE([NO_OPTION_NAME_WARNINGS], [1], [Should we avoid #warning on option name collisions?])
+    AC_MSG_RESULT([[Enabling NO_OPTION_NAME_WARNINGS as #warning does not work]])
+    ;;
+esac
+
 AC_MSG_CHECKING(for bin subdirectory)
 AC_ARG_WITH(binsubdir,
 	AC_HELP_STRING([--with-binsubdir], [bin ={bin,sbin}]),
diff --git a/sntp/configure.ac b/sntp/configure.ac
index 619cdf7c6..718fbef19 100644
--- a/sntp/configure.ac
+++ b/sntp/configure.ac
@@ -11,6 +11,17 @@ AC_PROG_LIBTOOL
 
 LIBOPTS_CHECK
 
+AC_MSG_CHECKING([[if $CC can handle #warning]])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[#warning foo]])],[ac_cv_cpp_warning=yes],[ac_cv_cpp_warning=no])
+AC_MSG_RESULT([$ac_cv_cpp_warning])
+
+case "$ac_cv_cpp_warning" in
+ no)
+    AC_DEFINE([NO_OPTION_NAME_WARNINGS], [1], [Should we avoid #warning on option name collisions?])
+    AC_MSG_RESULT([[Enabling NO_OPTION_NAME_WARNINGS as #warning does not work]])
+    ;;
+esac
+
 # Checks for libraries.
 
 # Checks for header files.