Changeset ba2263a for configure.in

Timestamp:

07/30/10 14:47:27 (10 years ago)

Author:

Shane Alcock <salcock@…>

Branches:

4.0.1-hotfixes, cachetimestamps, develop, dpdk-ndag, etsilive, getfragoff, help, libtrace4, master, ndag_format, pfring, rc-4.0.1, rc-4.0.2, rc-4.0.3, rc-4.0.4, ringdecrementfix, ringperformance, ringtimestampfixes

Children:

bd1e5fc

Parents:

3c2ddf4

Message:

• Add error message if no C++ compiler is available at configure time - we *could* do conditional compilation, I guess, but meh.
• Added fix for old versions of gcc that do not support -Wextra

File:

• configure.in (modified) (4 diffs)

configure.in

@@ -33 +33 @@
 dnl AC_GNU_SOURCE
 
+AC_DEFUN([rw_PROG_CXX_WORKS],
+[AC_REQUIRE([AC_PROG_CXX])dnl
+AC_CACHE_CHECK([whether the C++ compiler works],
+        [rw_cv_prog_cxx_works],
+        [AC_LANG_PUSH([C++])
+        AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
+                [rw_cv_prog_cxx_works=yes],
+                [rw_cv_prog_cxx_works=no])
+        AC_LANG_POP([C++])])
+])
+
 
 AM_CONFIG_HEADER([config.h])
@@ -38 +49 @@
 AC_PROG_CC
 AC_PROG_CXX
+rw_PROG_CXX_WORKS
+
+if test "$rw_cv_prog_cxx_works" = "no"; then
+        AC_MSG_ERROR("Failed to find working C++ compiler")
+fi
+
+
+
 AC_PROG_INSTALL
 dnl AC_PROG_YACC
@@ -72 +91 @@
         fi
         
-        CFLAGS="$CFLAGS -Wall -Wextra -Wmissing-prototypes -O2"
-        CXXFLAGS="$CXXFLAGS -Wall -Wextra -O2"
+        CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -O2"
+        CXXFLAGS="$CXXFLAGS -Wall -O2"
         LIBCFLAGS="$CFLAGS"
         LIBCFLAGS="$LIBCFLAGS -DLT_BUILDING_DLL=1"
@@ -80 +99 @@
         
         if test "$vis" = "yes"; then
-                LIBCFLAGS="$LIBCFLAGS -fvisibility=hidden"
-                LIBCXXFLAGS="$CXXFLAGS -fvisibility=hidden"
+                LIBCFLAGS="$LIBCFLAGS -Wextra -fvisibility=hidden"
+                LIBCXXFLAGS="$CXXFLAGS -Wextra -fvisibility=hidden"
         fi
 fi