Changeset 34076 for branches/eam_branches/ipp-20120601/psLib/m4/ipp_stdopts.m4

Timestamp:

Jun 26, 2012, 9:57:00 AM (14 years ago)

Author:

eugene

Message:

configure.ac changes: invoke LDFLAGS *before* probes, invoke CFLAGS *after* probes

File:

• branches/eam_branches/ipp-20120601/psLib/m4/ipp_stdopts.m4 (modified) (3 diffs)

branches/eam_branches/ipp-20120601/psLib/m4/ipp_stdopts.m4

@@ -1 +1 @@
 
-    dnl this is currently written to override an user-defined LDFLAGS, is that OK?
-
+dnl IPP_STDCFLAGS must go *after* external probes (to avoid Werror confusing things)
 AC_DEFUN([IPP_STDCFLAGS],
 [
@@ -15 +14 @@
       ]
     )
+    dnl this section accepts a user-defined CFLAGS, and sets CFLAGS to the empty string if not present
     AC_ARG_ENABLE(debug-build,
       [AS_HELP_STRING(--enable-debug-build,enable debug build: ie disable Werror)],
@@ -32 +32 @@
       ]
     )
-    AC_ARG_ENABLE(no-as-needed, [AS_HELP_STRING(--enable-no-as-needed, prevent as-needed option sometimes supplied to gcc such as Ubuntu after 11.11)],
-      [AC_MSG_RESULT(compile optimization enabled) 
+])
+
+dnl IPP_STDLDFLAGS must go *before* external probes (so linking is done with --no-as-needed if needed)
+AC_DEFUN([IPP_STDLDFLAGS],
+[
+    dnl this section accepts a user-defined LDFLAGS, and sets LDFLAGS to the empty string if not present
+    AC_ARG_ENABLE(no-as-needed, 
+      [AS_HELP_STRING(--enable-no-as-needed, prevent as-needed option sometimes supplied to gcc such as Ubuntu after 11.11)],
+      [AC_MSG_RESULT(no-as-needed passed to linker) 
         if test x"${LDFLAGS}" == x; then
+          LDFLAGS="-Wl,--no-as-needed"
+        else
           LDFLAGS="${LDFLAGS=} -Wl,--no-as-needed"
-        else
-          LDFLAGS="-Wl,--no-as-needed"
+        fi
+      ],
+      [AC_MSG_RESULT(as-needed linker flags accepted) 
+        if test x"${LDFLAGS}" == x; then
+          LDFLAGS=""
         fi
       ]