[Condor-devel] configure.ac --with-gcc-version-check flag

[Matthew Farrellee <matt@xxxxxxxxxxx>]

I'd like to add a --with[out]-gcc-version-check-flag to configure. The 
purpose is to allow configure to continue even when it does not find a 
blessed version of gcc. The resulting build attempt may or may not be 
successful because of the unsupported version of gcc, but that should 
not be a concern.

This will simplify quick clipped ports, by eliminating the need to edit 
configure.ac, and will help bt in cross tests on platforms that Condor 
is not compiled on but where the tests must be configured.

I would like to commit this flag, which is off by default, to the 7.0 
series before the next 7.1 merge to help bt.

Note: I considered providing meaningful values for CompilerMajor, 
CompilerMajor, CompilerMinor, CompilerPatch, but rejected the idea on 
the grounds that they might be confused in the code, and when you use 
this flag you are putting your ability to build in your own hands.

Best,


matt

---

diff --git a/src/configure.ac b/src/configure.ac
index af0150f..4a1aefb 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -507,6 +507,12 @@ AC_ARG_WITH(proper,
   [PROPER=$withval],
   [PROPER=no])

+AC_ARG_WITH(gcc-version-check,
+  [AS_HELP_STRING([--with-gcc-version-check],
+     [Fail if the gcc version is not explicitly blessed])],
+  [GCC_VERSION_CHECK=$withval],
+  [GCC_VERSION_CHECK=yes])
+
 AC_ARG_WITH(full-port,
   [AS_HELP_STRING([--with-full-port],
     [Perform a full build, i.e. Standard Universe included])],
@@ -841,9 +847,17 @@ case "$gcc_vers" in
     CompilerPatch="2"
     ;;
  * )
-   AC_MSG_RESULT([ERROR])
-   AC_MSG_ERROR([Condor will not compile with gcc version $gcc_vers])
-   ;;
+    if test "x$GCC_VERSION_CHECK" = "xyes"; then
+      AC_MSG_RESULT([ERROR])
+      AC_MSG_ERROR([Condor will not compile with gcc version $gcc_vers])
+    else
+      AC_MSG_RESULT([$gcc_vers (UNSUPPORTED)])
+      CompilerKind="UNSUPPORTED"
+      CompilerMajor="0"
+      CompilerMinor="0"
+      CompilerPatch="0"
+    fi
+    ;;
 esac
 AC_MSG_RESULT([$gcc_vers])