how to switch to read-only data section test mangled

[Jack Howarth]

  The reason the braces are missing from configure are that I forgot to
double-brace them in acinclude.m4 so that they aren't eaten away by automake.
The patch below should solve this issue and allow the single braces to survive
in the generated configure.

--- acinclude.m4.orig	2011-05-17 19:03:09.000000000 -0400
+++ acinclude.m4	2011-05-17 19:03:43.000000000 -0400
@@ -1941,8 +1941,8 @@
 esac
 
 cat >conftest.c <<EOF
-extern const int foo[];		/* Suppresses C++'s suppression of foo */
-const int foo[] = {1,2,3};
+extern const int foo[[]];		/* Suppresses C++'s suppression of foo */
+const int foo[[]] = {1,2,3};
 EOF
 echo "Test program:" >&AC_FD_CC
 cat conftest.c >&AC_FD_CC

Sorry about that ommission.
                Jack


On Tue, May 17, 2011 at 06:15:59PM -0400, Jack Howarth wrote:
>   The problem with llvm-gcc and gmp-5.0.2 turns out to be due to an improper
> regeneration of connfigure. The patch I sent to fix this only included an
> acinclude.m4 change which is properly applied...
> 
> http://gmplib.org/list-archives/gmp-bugs/2011-April/002236.html
> 
> however the regenerated configure in gmp 5.0.2 strangely ended up with
> the line...
> 
> const int foo[] = {1,2,3};
> 
> transformed into....
> 
> const int foo = {1,2,3};
> 
> This is a critical error as it produces warning in both clang....
> 
> conftest.c:1:22: warning: excess elements in scalar initializer
> const int foo = { 1, 2, 3 };
>                      ^
> 1 warning generated.
> 
> and llvm-gcc...
> 
> conftest.c:1: warning: excess elements in scalar initializer
> conftest.c:1: warning: (near initialization for 'foo')
> conftest.c:1: warning: excess elements in scalar initializer
> conftest.c:1: warning: (near initialization for 'foo')
> 
> More importantly this malformed test triggers the creation of a .literal4 section
> on llvm-gcc. I assume the configure was hand-edited as it should have matched the
> proper contents from acinclude.m4 in gmp-5.0.2. Can we please get this fixed
> for gmp 5.0.3?
>        Jack
> 
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